Publications

Books:

1. F. Tariq, M. Khandaker, and I. S. Ansari, 6G Wireless: The Communication Paradigm Beyond 2030, CRC Press, 2023. ISBN: 9781003282211.

2. Imran Shafique Ansari, On the Performance of Free-Space Optical Systems, Lambert Academic Publishing, 2015. ISBN: 9783659513794.

3. Imran Shafique Ansari, Composite and Cascaded Generalized-K Channel Model and Some Analyses, Lambert Academic Publishing, 2011. ISBN: 3845408634, 9783845408637.

Book Chapters:

1. M. Usman, M. Qaraqe, M. R. Asghar, and I. S. Ansari, Demystifying Futuristic Satellite Networks: Requirements, Security Threats, and Issues, Wiley Publishing, DOI 10:1002/9781119751717.ch13, Print ISBN 978-1-119-xxxxx-x, Online ISBN 978-1-119-75171-7, 2021.

2. M. Usman, M. Qaraqe, M. R. Asghar, and I. S. Ansari, Role of D2D Communications in Mobile Health Applications: Security Threats and Requirements, Wiley Publishing, DOI 10.1002/9781119644316.ch9, Print ISBN 978-1-119-64424-8, Online ISBN 978-1-119-64431-6, 2021.

3. M. Usman, M. Usman, M. R. Asghar, I. S. Ansari, and F. Granelli, Integrating Public Safety Networks to 5G: Applications and Standards, Wiley Publishing, DOI 10.1002/9781119515579.ch11, Print ISBN 978-1-119-51553-1, Online ISBN 978-1-119-51557-9, 2019.

4. I. S. Ansari, H. AlQuwaiee, E. Zedini, and M.-S. Alouini, Information Theoretical Limits of Free-Space Optical Links, Springer Publishing, DOI 10:1007/978-3-319-30201-0_9, Print ISBN 978-3-319-30200-3, Online ISBN 978-3-319-30201-0, 2016.

Journals:

1. V. Ozduran, N. Nomikos, E. S.-Nasab, I. S. Ansari, and P. Trakadas, "Relay-aided uplink NOMA under non-orthogonal CCI and imperfect SIC in 6G networks," to appear in IEEE Open Journal of Vehicular Technology.

2. S. M. AlHidai, M. R. Asghar, and I. S. Ansari, "Towards a cyber resilience quantication framework (CRQF) for IT infrastructure," to appear in Elsevier Computer Networks.

3. H. Lei, H. Yang, K.-H. Park, I. S. Ansari, G. Pan, and M.-S. Alouini, "Trajectory and power design for aerial CRNs with colluding eavesdroppers," to appear in IEEE Transactions on Vehicular Technology.

4. Z. Xiao, L. Yang, P. S. Bithas, I. S. Ansari, X. Li, and M.-S. Alouini, "Performance analysis of mixed underwater acoustic/optical relaying systems," to appear in IEEE Transactions on Wireless Communications.

5. H. Lei, H. Ran, I. S. Ansari, K.-H. Park, and M.-S. Alouini, "DDPG-based aerial secure data collection," to appear in IEEE Transactions on Communications.

6. H. Lei, J. Jiang, I. S. Ansari, G. Pan, and M.-S. Alouini, "Trajectory and power design for aerial multi-user covert communications," to appear in IEEE Transactions on Aerospace and Electronic Systems.

7. M. K. Ghosh, M. K. Kundu, M. Ibrahim, A. S. M. Badrudduza, M. S. Anower, I. S. Ansari, and H. Yu, "Physical layer security in mixed UOWC-RF networks with energy harvesting relay against multiple eavesdroppers," to appear in IEEE Open Journal of the Communications Society.

8. H. Lei, S. Zhou, I. S. Ansari, Y. Li, G. Pan, and M.-S. Alouini, "On secure mmWave RSMA systems," to appear in IEEE Internet of Things Journal.

9. S. M. AlHidaifi, M. R. Asghar, and I. S. Ansari, "A survey on cyber resilience: Key strategies, research challenges, and future directions," to appear in ACM Computing Surveys.

10. M. A. Rakib, M. Ibrahim, A. S. M. Badrudduza, I. S. Ansari, S. Chakravarty, I. Ahmed, S. M. Razzak, "A RIS empowered THz-UWO relay system for air-to-underwater mixed network: Performance analysis with pointing errors," to appear in IEEE Internet of Things Juornal.

11. M. R. A. Ruku, M. Ibrahim, A. S. M. Badrudduza, I. S. Ansari, W. Khalid, and H. Yu, "Effects of co-channel interference on RIS empowered wireless networks amid multiple eavesdropping attempts," to appear in ICT Express.

12. H. Lei, C. Zhu, K.-H. Park, I. S. Ansari, W. Lei, H. Tang, and K. J. Kim, "Outage analysis of aerial semi-grant-free NOMA systems," to appear in Elsevier Digital Communications and Networks.

13. N. S. Mandita, M. K. Kundu, S. H. Islam, A. S. M. Badrudduza, and I. S. Ansari, "On secrecy performance of mixed a-n-u and Malaga RF-FSO variable gain relaying channel," to appear in SPIE Optical Engineering.

14. M. Qaraqe, M. Usman, A. Serbes, I. S. Ansari, and M.-S. Alouini, "Power hotspots in space: Powering cubeSats via inter-satellite optical wireless power transfer," to appear in IEEE Internet of Things Magazine.

15. A. Samir, M. Elsayed, A. El-Banna, K. M. Rabie, I. S. Ansari, and B. M. ElHalawany, "Performance analysis of dual-hop hybrid RF-UOWC NOMA systems," to appear in MDPI Sensors.

16. A. S. M. Badrudduza, S. H. Islam, M. K. Kundu, and I. S. Ansari, "Secrecy performance of a-k-u shadowed fading channel," to appear in Elsevier ICT Express.

17. D. Bremner, I. S. Ansari, J. MacDougall, S. Hussain, M. Ma, J. Ponciano, X. Liu, H. T. Abbas, K. A. A. Gamage, and M. A. Imran, "Looking back: Reviewing the challenges of policy development during the covid-19 pandemic for a TNE partnership in higher education," to appear in Frontiers in Education.

18. M. Usman, M. Qaraqe, M. R. Asghar, and I. S. Ansari, “Process mining and user privacy in D2D and IoT networks,” to appear in Springer Informatik Spektrum.

19. H. Savojbolaghchi, S. M. S. Sadough, M. T. Dabiri, and I. S. Ansari, “Generalized channel estimation and data detection for MIMO multiplexing FSO parallel channels over limited space,” to appear in Elsevier Optics Communications.

20. A. Akhlaq, I. S. Ansari, G. Lechner, M. Rice, and I. Ahmad, “Statistical characterisation and analysis of differential correlation based frame detector,” to appear in IET Communications.

21. V. K. Jagadeesh, I. S. Ansari, V. Palliyembil, P. M. Nathan, and K. A. Qaraqe, “Performance analysis of DF relay based RF-FSO communication system in the presence of pointing errors,” to appear in IET Signal Processing.

22. A. M. Magableh, O. S. Badarneh, I. S. Ansari, and T. Aldalgamouni, “Error analysis of TAS/MRC in Rayleigh fading channel with non-Gaussian noise,” to appear in Journal of The Franklin Institute.

23. J. Gupta, V. Dwivedi, V. Karwal, I. S. Ansari, and G. K. Karagiannidis, “Free space optical communications with distributed switch-and-stay combining,” to appear in IET Communications.

24. T. Shafique, O. Amin, M. Abdallah, I. S. Ansari, M.-S. Alouini, and K. A. Qaraqe, "Performance analysis of single photon avalanche diode underwater VLC system using ARQ," to appear in IEEE Photonics Journal.

25. H. Lei, J. Zhang, K.-H. Park, I. S. Ansari, G. Pan, and M.-S. Alouini, "Secrecy performance analysis of SIMO underlay cognitive radio systems with outdated CSI," to appear in IET Communications.

26. L. Yang, M. Hasna, and I. S. Ansari, "Unified performance analysis for multiuser mixed $\eta$-$\mu$ and M-distribution dual-hop RF/FSO systems," to appear in IEEE Transactions on Communications.

27. H. Zhang, H. Lei, I. S. Ansari, G. Pan, and K. A. Qaraqe, "Security performance analysis of DF cooperative relay networks over Nakagami-m fading channels," to appear in TIIS KSII Transactions on Internet and Information Systems.

28. H. Lei, Z. Huan, I. S. Ansari, G. Pan, R. Zhi, and K. A. Qaraqe, "Security performance analysis over SIMO generalized-K fading channels," to appear in Journal of Electronics & Information Technology.

29. P. Du, H. Lei, I. S. Ansari, J. Du, and X. Chu, "Distributionally robust optimization based chance-constrained energy management in hybrid energy powered cellular networks," to appear in Elsevier Digital Communications and Networks (DCN).

30. H. Lei, F. Yang, H. Liu, I. S. Ansari, K. J. Kim, and T. A. Tsiftsis, "On secure NOMA-aided semi-grant-free systems," IEEE Transactions on Wireless Communications, vol. 23, no. 1, pp. 74-90, Jan. 2024.

31. T. Ahmed, A. S. M. Badrudduza, S. M. R. Islam, S. H. Islam, M. Ibrahim, M. A. Al-Wadud, and I. S. Ansari, "Enhancing physical layer secrecy performance for RIS-assisted RF-FSO mixed wireless system," IEEE Access, vol. 11, pp. 127737-127753, 2023.

32. M. M. Rahman, A. S. M. Badrudduza, N. A. Sarker, M. Ibrahim, I. S. Ansari, and H. Yu, "RIS-aided mixed RF-FSO wireless networks: Secrecy performance analysis with simultaneous  eavesdropping," IEEE Access, vol. 11, pp. 126507-126523, 2023.

33. V. Ozduran, M. Mohammadi, I. S. Ansari, and N. Nomikos, "Performance analysis of uplink non-orthogonal multiple access in the presence of co-channel interference," IEEE Transactions on Vehicular Technology, vol. 72, no. 9, pp. 11590-11602, Sep. 2023.

34. N. A. Sarker, A. S. M. Badrudduza, M. K. Kundu, I. S. Ansari, I. Ahmed, "Effects of eavesdropper on the performance of mixed n-u and DGG cooperative relaying system," IEEE Systems Journal, vol. 17, no. 3, pp. 4627-4638, Sep. 2023.

35. S. Chen, L. Yang, Q. Zhu, Y. Yuan, I. S. Ansari, and G. Zhu, "On the performance of the UAV RIS-assisted dual-hop PLC-RF systems," IEEE Transactions on Vehicular Technology, vol. 72, no. 8, pp. 11035-11040, Aug. 2023.

36. H. Lei, H. Yang, K.-H. Park, I. S. Ansari, J. Jiang, and M.-S. Alouini, "Joint trajectory design and user scheduling for secure aerial underlay IoT systems," IEEE Internet of Things Journal, vol. 10, no. 15, pp. 13637-13648, Aug. 2023.

37. H. Lei, F. Yang, I. S. Ansari, H. Liu, K. J. Kim, and T. A. Tsiftsis, "Secrecy outage performance analysis for uplink CR-NOMA systems with hybrid SIC," IEEE Internet of Things Journal, vol. 10, no. 15, pp. 13181-13195, Aug. 2023.

38. H. Lei, C. Zhu, I. S. Ansari, K.-H. Park, and G. Pan, "Secrecy outage performance analysis of dual-hop RF-UOWC systems," IEEE Systems Journal, vol. 17, no. 2, pp. 2133-2144, Jun. 2023.

39. W. Lei, Y. Zhang, I. S. Ansari, H. Tang, and H. Lei, "Filter design and power allocation for uplink time-reversal NOMA," IEEE Transactions on Communications, vol. 71, no. 4, pp. 2074-2086, Apr. 2023.

40. M. Ibrahim, A. S. M. Badrudduza, M. S. Hossen, M. K. Kundu, I. S. Ansari, and I. Ahmed, "On effective secrecy throughput of underlay spectrum sharing  $\alpha$-$\mu$-/Malaga hybrid model under interference-and-transmit power constraints," IEEE Photonics Journal, vol. 15, no. 2, pp. 1-13, Apr. 2023.

41. H. Lei, S. Zhou, K.-H. Park, I. S. Ansari, H. Tang, and M.-S. Alouini, "Outage analysis of millimeter wave RSMA systems," IEEE Transactions on Communications, vol. 71, no. 3, pp. 1504-1520, Mar. 2023.

42. T. Hossain, S. Shabab, A. S. M. Badrudduza, M. K. Kundu, and I. S. Ansari, "On the physical layer security performance over RIS-aided dual-hop RF-UOWC mixed network," IEEE Transactions on Vehicular Technology, vol. 72, no. 2, pp. 2246-2257, Feb. 2023.

43. H. Lei, X. She, K.-H. Park, I. S. Ansari, Z. Shi, J. Jiang, and M.-S. Alouini, "On secure CDRT with NOMA and physical-layer network coding," IEEE Transactions on Communications, vol. 71, no. 1, pp. 381-396, Jan. 2023.

44. G. Tang, P. Du, H. Lei, I. S. Ansari, and Y. Fu, "Trajectory design and communication resources allocation for wireless powered secure UAV communication systems," IEEE Systems Journal, vol. 16, no. 4, pp. 6300-6308, Dec. 2022.

45. M. Ibrahim, A. S. M. Badrudduza, M. S. Hossen, M. K. Kundu, and I. S. Ansari, "Enhancing security of TAS/MRC based mixed RF-UOWC system with induced underwater turbulence effect," IEEE Systems Journal, vol. 16, no. 4, pp. 5584-5595, Dec. 2022.

46. H. Lei, C. Zhu, K.-H. Park, W. Lei, I. S. Ansari, and T. A. Tsiftsis, "On secure NOMA-based terrestrial and aerial IoT systems," IEEE Internet of Things Journal, vol. 9, no. 7, pp. 5329-5343, Apr. 2022.

47. N. A. Sarker, A. S. M. Badrudduza, S. M. R. Islam, S. H. Islam, M. K. Kundu, I. S. Ansari, and K.-S. Kwak, "On the intercept probability and secure outage analysis of mixed (a-k-u)-shadowed and Malaga turbulent models," IEEE Access, vol. 9, pp. 133849-133860, 2021.

48. N. H. Juel, A. S. M. Badrudduza, S. M. R. Islam, S. H. Islam, M. K. Kundu, I. S. Ansari, M. M. Mowla, and K.-S. Kwak, "Secrecy performance analysis of mixed a-u and exponentiated Weibull RF-FSO cooperative relaying system," IEEE Access, vol. 9, pp. 72342-72356, 2021.

49. A. S. M. Badrudduza, M. Ibrahim, S. M. R. Islam, M. S. Hossen, M. K. Kundu, I. S. Ansari, and H. Yu, "Security at the physical layer over GG fading and mEGG turbulence induced RF-UOWC mixed system," IEEE Access, vol. 9, pp. 18123-18136, 2021.

50. M. T. Dabiri, S. Kalantary, H. Sa, M. J. Piran, I. S. Ansari, D. Y. Suh, and M. Uysal, "Iterative signal detection under timing errors for optical wireless links with high mobility," IEEE Transactions on Vehicular Technology, vol. 70, no. 11, pp. 11710-11720, Nov. 2021.

51. I. S. Ansari, L. Jan, Y. Tang, L. Yang, and M. H. Zafar, "Outage and error analysis of dual-hop TAS/MRC MIMO RF-UOWC systems," IEEE Transactions on Vehicular Technology, vol. 70, no. 10, pp. 10093-10104, Oct. 2021.

52. M. T. Dabiri, S. K. Kalantary, M. J. Piran, I. S. Ansari, M. Uysal, W. Saad, and, C. S. Hong, "UAV-assisted free space optical communication system with amplify-and-forward relaying," IEEE Transactions on Vehicular Technology, vol. 70, no. 9, pp. 8926-8936, Sep. 2021.

53. L. Yang, Q. Zhu, S. Li, I. S. Ansari, and S. Yu, "On the performance of mixed FSO-UWOC dual-hop transmission systems," to appear in IEEE Wireless Communications Letters, vol. 10, no. 9, pp. 2041-2045, Sep. 2021.

54. S. H. Islam, A. S. M. Badrudduza, S. M. R. Islam, F. I. Shahid, I. S. Ansari, and M. K. Kundu, "Impact of correlation and pointing error on secure outage performance over arbitrary correlated Nakagami-m and M-turbulent fading mixed RF-FSO channel," IEEE Photonics Journal, vol. 13, no. 2, pp. 1-17, Apr. 2021.

55. T. R. Rasethuntsa and I. S. Ansari, "Applications of Meijer's factorization theorems in performance analyses of all-optical multi-hop FSO systems," IEEE Transactions on Wireless Communications, vol. 20, no. 3, pp. 2078-2091, Mar. 2021.

56. D.-T. Do, M.-S. V. Nguyen, F. Jameel, R. Jantti, and I. S. Ansari, "Performance evaluation of relay-aided CR-NOMA for beyond 5G communications," IEEE Access, vol. 8, pp. 134838-134855, 2020.

57. N. A. Sarker, A. S. M. Badrudduza, S. M. R. Islam, S. H. Islam, I. S. Ansari, M. K. Kundu, M. F. Samad, M. B. Hossain, and H. Yu, "Secrecy performance analysis of mixed hyper-Gamma and Gamma-Gamma cooperative relaying system," IEEE Access, vol. 8, pp. 131273-131285, 2020.

58. M. T. Dabiri, M. Rezaee, I. S. Ansari, and V. Yazdanian, "Channel modeling for UAV-based optical wireless links with nonzero boresight pointing errors," IEEE Transactions on Vehicular Technology, vol. 69, no. 12, pp. 14238-14246, Dec. 2020.

59. H. Lei, R. Guo, K.-H. Park, I. S. Ansari, K. J. Kim, and M.-S. Alouini, "On secure downlink NOMA systems with outage constraint," IEEE Transactions on Communications, vol. 68, no. 12, pp. 7824-7836, Dec. 2020.

60. S. H. Islam, A. S. M. Badrudduza, S. M. R. Islam, F. I. Shahid, I. S. Ansari, M. K. Kundu, S. K. Ghosh, M. B. Hossain, A. S. M. S. Hosen, and G. H. Cho, "On secrecy performance of mixed generalized Gamma and Malaga RF-FSO variable gain relaying channel," IEEE Access, vol. 8, no. 1, pp. 104127-104138, Dec. 2020.

61. Y. Ai, A. Mathur, H. Lei, M. Cheffena, and I. S. Ansari, "Secrecy enhancement of RF backhaul system with parallel FSO communication link," Elsevier Optics Communications, vol. 475, no. 126193, pp. 1-10, Nov. 2020.

62. H. Lei, H. Luo, K.-H. Park, I. S. Ansari, W. Lei, G. Pan, and M.-S. Alouini, "On secure mixed RF-FSO systems with TAS and imperfect CSI," IEEE Transactions on Communications, vol. 68, no. 7, pp. 4461-4475, Jul. 2020.

63. G. Wang, L. Yang, and I. S. Ansari, "Mixed dual-hop FSO-RF communication systems through reconfigurable intelligent surface," IEEE Communications Letters, vol. 24, no. 7, pp. 1558-1562, Jul. 2020.

64. D. R. Pattanayak, V. K. Dwivedi, V. Karwal, I. S. Ansari, H. Lei, and M.-S. Alouini, "On the physical layer security of a decode and forward based mixed FSO/RF cooperative system," IEEE Wireless Communications Letters, vol. 9, no. 7, pp. 1031-1035, Jul. 2020.

65. G. Nauryzbayev, M. Abdallah, I. S. Ansari, N. Al-Dhahir, and K. Qaraqe, "Outage of cognitive electric vehicle networks over mixed RF/VLC channels with signal-dependent noise and imperfect CSI," IEEE Transactions on Vehicular Technology, vol. 69, no. 6, pp. 6828-6832, Jun. 2020.

66. M. Usman, M. Qaraqe, M. R. Asghar, and I. S. Ansari, "Mitigating DDoS attacks in satellite networks," Wiley Transactions on Emerging Telecommunications Technologies, vol. 31, no. 6, pp. 1-9, Jun. 2020.

67. M. Usman, M. Qaraqe, M. R. Asghar, A. A. Gebremariam, I. S. Ansari, F. Granelli, and Q. Abbasi, "A business and legislative perspective of V2X and mobility applications in 5G networks," IEEE Access, vol. 8, no. 1, pp. 67426-67435, Apr. 2020.

68. H. Lei, Y. Zhang, K.-H. Park, I. S. Ansari, G. Pan, and M.-S. Alouini, "Performance analysis of dual-hop RF-UWOC systems," IEEE Photonics Journal, vol. 12, no. 2, pp. 1-15, Apr. 2020.

69. H. Lei, W. Di, K.-H. Park, I. S. Ansari, J. Jiang, G. Pan, and M.-S. Alouini, “Safeguarding UAV IoT communication systems against randomly located eavesdroppers," IEEE Internet of Things Journal, vol. 7, no. 2, pp. 1230-1244, Feb. 2020.

70. M. T. Dabiri, S. M. S. Sadough, and I. S. Ansari, “Tractable optical channel modeling between UAVs,” IEEE Transactions on Vehicular Technology, vol. 68, no. 12, pp. 11543-11550, Dec. 2019.

71. H. Lei, Z. Yang, K.-H. Park, I. S. Ansari, Y. Guo, G. Pan, and M.-S. Alouini, “Secrecy outage analysis for cooperative NOMA systems with relay selection schemes,” IEEE Transactions on Communications, vol. 67, no. 9, pp. 6283-6298, Sep. 2019.

72. C. Christopoulou, H.G. Sandalidis, and I. S. Ansari, “Outage probability of a multisensor mixed UOWC-FSO setup,” IEEE Sensors Letters, vol. 3, no. 8, pp. 1-4, Aug. 2019.

73. H. Safi, A. A. Sharifi, M. Dabiri, I. S. Ansari, and J. Cheng, “Adaptive channel coding and power control for practical FSO communication systems under channel estimation error,” IEEE Transactions on Vehicular Technology, vol. 68, no. 8, pp. 7566-7577, Aug. 2019.

74. M. Petkovic, I. S. Ansari, G. Djordjevic, and K. A. Qaraqe, “Error rate and ergodic capacity of RF-FSO system with partial relay selection in the presence of pointing errors,” Elsevier Optics Commmunications, vol. 438, pp. 118-125, May 2019.

75. L. Yang, M. Hasna, and I. S. Ansari, “Physical layer security for TAS/MRC systems with and without co-channel interference over η-µ fading channels,” IEEE Transactions on Vehicular Technology, vol. 67, no. 12, pp. 12421-12426, Dec. 2018.

76. M. Usman, M. R. Asghar, I. S. Ansari, and M. Qaraqe, “Security in wireless body area networks: From in-body to off-body communications,” IEEE Access, vol. 6, no. 1, pp. 58064-58074, Dec. 2018.

77. M. Usman, M. R. Asghar, I. S. Ansari, F. Granelli, and K. A. Qaraqe, “Technologies and solutions for location-based services in smart cities: past, present, and future,” IEEE Access, vol. 6, no. 1, pp. 22240-22248, Dec. 2018.

78. L. Yang, M.-S. Alouini, and I. S. Ansari, “Asymptotic performance analysis of two-way relaying FSO networks with nonzero boresight pointing errors over double-generalized Gamma fading channels,” IEEE Transactions on Vehicular Technology, vol. 67, no. 8, pp. 7800-7805, Aug. 2018.

79. O. Kucur, G. K. Kurt, M. Z. Shakir, and I. S. Ansari, “Nonorthogonal multiple access for 5G and beyond,” Hindawi Wireless Communications and Mobile Computing, vol. 2018, Jul. 2018.

80. B. Bag, A. Das, I. S. Ansari, A. Prokes, C. Bose, and A. Chandra, “Performance analysis of hybrid FSO systems using FSO/RF-FSO link adaptation,” IEEE Photonics Journal, vol. 10, no. 3, pp. 1-17, Jun. 2018.

81. O. S. Badarneh, F. S. Almehmadi, I. S. Ansari, and X. Yang, "Wireless energy harvesting in cooperative decode-and-forward relaying networks over mixed generalized $\eta$-$\mu$ and $\kappa$-$\mu$ fading channels," Wiley Transactions on Emerging Telecommunications Technologies, vol. 29, no. 2, pp. 1-18, Feb. 2018.

82. H. Lei, H. Zhang, I. S. Ansari, Z. Ren, G. Pan, K. A. Qaraqe, and M.-S. Alouini, "On secrecy outage of relay selection in underlay cognitive radio networks over Nakagami-m fading channels," IEEE Transactions on Cognitive Communications and Networking, vol. 3, no. 4, pp. 614-627, Dec. 2017.

83. N. H. Mahmood, I. S. Ansari, P. Popovski, P. Mogensen, and K. A. Qaraqe, "Physical-layer security with full-duplex transceivers and multiuser receiver at eve," IEEE Transactions on Communications, vol. 65, no. 10, pp. 4392-4405, Oct. 2017.

84. H. Lei, J. Zhang, K.-H. Park, P. Xu, I. S. Ansari, G. Pan, B. Alomair, and M.-S. Alouini, "On secure NOMA systems with transmit antenna selection schemes," IEEE Access, vol. 5, no. 1, pp. 17450-17464, Sep. 2017.

85. H. Lei, Z. Dai, I. S. Ansari, K.-H. Park, G. Pan, and M.-S. Alouini, "On secrecy performance of mixed RF-FSO systems," IEEE Photonics Journal, vol. 9, no. 4, pp. 1-14, Aug. 2017.

86. H. Lei, M. Xu, I. S. Ansari, G. Pan, K. A. Qaraqe, and M.-S. Alouini, "On secure underlay MIMO cognitive radio networks with energy harvesting and transmit antenna selection," IEEE Transactions on Green Communications and Networking, vol. 1, no. 2, pp. 1-12, Jun. 2017.

87. H. Lei, I. S. Ansari, G. Pan, B. Alomair, and M.-S. Alouini, "Secrecy capacity analysis over $\alpha$-$\mu$ fading channels," IEEE Communications Letters, vol. 21, no. 6, pp. 1445-1448, Jun. 2017.

88. F. S. Al-Qahtani, A. H. Abd El-Malek, I. S. Ansari, R. M. Radaydeh, and S. A. Zummo, "Outage analysis of mixed underlay cognitive RF MIMO and FSO relaying with interference reduction," IEEE Photonics Journal, vol. 9, no. 2, pp. 1-22, Apr. 2017.

89. H. Lei, C. Gao, I. S. Ansari, Y. Guo, Y. Zou, G. Pan, and K. A. Qaraqe, "Secrecy outage performance of transmit antenna selection for MIMO underlay cognitive radio systems over Nakagami-m channels," IEEE Transactions on Vehicular Technology, vol. 66, no. 3, pp. 2237-2250, Mar. 2017.

90. I. S. Ansari, F. Yilmaz, M.-S. Alouini, and O. Kucur, “New results on the sum of Gamma random variates with application to the performance of wireless communication systems over Nakagami-m fading channels", Wiley Transactions on Emerging Technologies in Telecommunications, vol. 28, no. 1, pp. 1-14, Jan. 2017.

91. H. Lei, H. Zhang, I. S. Ansari, C. Gao, Y. Guo, G. Pan, and K. A. Qaraqe, "Secrecy outage performance for SIMO underlay cognitive radio systems with generalized selection combining over Nakagami-m channels," IEEE Transactions on Vehicular Technology, vol. 65, no. 12, pp. 10126-10132, Dec. 2016.

92. H. M. AlQuwaiee, I. S. Ansari, and M.-S. Alouini, "On the maximum and minimum of double generalized Gamma variates with applications to the performance of free-space optical communication systems," IEEE Transactions on Vehicular Technology, vol. 65, no. 11, pp. 8822-8831, Nov. 2016.

93. H. Lei, I. S. Ansari, C. Gao, Y. Guo, G. Pan, and K. A. Qaraqe, "Physical-layer security over generalized-K fading channels," IET Communications, vol. 10, no. 16, pp. 2233-2237, Oct. 2016.

94. V. K. Jagadeesh, I. S. Ansari, V. Palliyembil, P. M. Nathan, and K. A. Qaraqe, "Channel capacity analysis of a mixed dual-hop radio-frequency-free space optical transmission system with Malaga distribution," IET Communications, vol. 10, no. 16, pp. 2119-2124, Oct. 2016.

95. H. Lei, C. Gao, I. S. Ansari, Y. Guo, G. Pan, and K. A. Qaraqe, "On physical layer security over SIMO generalized-K fading channel," IEEE Transactions on Vehicular Technology, vol. 65, no. 9, pp. 7780-7785, Sep. 2016.

96. H. Lei, H. Zhang, I. S. Ansari, G. Pan, and K. A. Qaraqe, "Secrecy outage analysis for SIMO underlay cognitive radio networks over generalized-K fading channels," IEEE Signal Processing Letters, vol. 23, no. 8, pp. 1106-1110, Aug. 2016.

97. H. Lei, H. Zhang, I. S. Ansari, Y. Guo, C. Gao, G. Pan, and K. A. Qaraqe, "Performance analysis of physical layer security over generalized-K fading channels using a mixture Gamma distribution," IEEE Communications Letters, vol. 20, no. 2, pp. 408-411, Feb. 2016.

98. I. S. Ansari, F. Yilmaz, and M.-S. Alouini, "Performance analysis of free-space optical links over Málaga (M) turbulence channels with pointing errors," IEEE Transactions on Wireless Communications, vol. 15, no. 1, pp. 91-102, Jan. 2016.

99. H. M. AlQuwaiee, I. S. Ansari, and M.-S. Alouini, "On the performance of free-space optical communication systems over double generalized Gamma channel," IEEE Journal on Selected Areas in Communications, vol. 33, no. 9, pp. 1829-1840, Sep. 2015.

100. I. S. Ansari, M.-S. Alouini, and J. Cheng, "Ergodic capacity analysis of free-space optical links with nonzero boresight pointing errors," IEEE Transactions on Wireless Communications, vol. 14, no. 8, pp. 4248-4264, Aug. 2015.

101. E. Zedini, I. S. Ansari, and M.-S. Alouini, “Performance analysis of mixed Nakagami-m and Gamma-Gamma dual-hop FSO transmission systems", IEEE Photonics Journal, vol. 7, no. 1, Dec. 2014.

102. I. S. Ansari, F. Yilmaz, and M.-S. Alouini, “Impact of pointing errors on the performance of mixed RF/FSO dual-hop transmission systems", IEEE Wireless Communications Letters, vol. 2, no. 3, pp. 351-354, Jun. 2013.

103. I. S. Ansari, S. Al-Ahmadi, F. Yilmaz, M.-S. Alouini, and H. Yanikomeroglu, “A new formula for the BER of binary modulations with dual-branch selection over generalized-K composite fading channels”, IEEE Transactions on Communications, vol. 59, no. 10, pp. 2654–2658, Oct. 2011.

Conferences:

1. S. K. Yoo, P. C. Sofotasios, S. L. Cotton, L. Zhang, J. S. Song, I. S. Ansari, and Y. J. Chun, "Measurements based physical layer security in device to device mm-Wave  communications," in Proceedings of IEEE 97th Vehicular Technology Conference (VTC Spring' 2023), Florence, Italy, Jun. 2023.

2. S. K. Yoo, S. L. Cotton, L. Zhang, J. S. Song, I. S. Ansari, and P. C. Sofotasios, "On the secrecy capacity of F composite fading channels with multiple eavesdroppers," in Proceedings of IEEE International Conference on Communications (ICC' 2023), Rome, Italy, May-Jun. 2023.

3. S. K. Yoo, P. C. Sofotasios, S. L. Cotton, L. Zhang, J. S. Song, and I. S. Ansari, "Secure outage probability in the presence of two eavesdroppers and composite fading," in Proceedings of Global Information Infrastructure and Networking Symposium (GIIS' 2022), Argostoli, Kefalonia, Greece, Sep. 2022.

4. H. Lei, Z. Chen, K.-H. Park, W. Lei, and I. S. Ansari, "On secure downlink NOMA systems with aerial eavesdroppers," in Proceedings of 32nd Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC' 2021), Virtual, Sep. 2021.

5. S. Hussain, Q. H. Abbasi, M. U. Rehman, H. T. Abbas, I. S. Ansari, and M. A. Imran, "Student-staff partnership for co-creating tutorial based feedback approach," in Proceedings of 14th Annual University of Glasgow Learning and Teaching Conference, Glasgow, UK, Jun. 2021.

6. M. U. Rehman, S. Hussain, I. S. Ansari, A. M. Abdulghani, A. Centeno, H. T. Abbas, H. Heidari, H. Ye, J. Ponciano, Q. H. Abbasi, J. Qadir, and M. A. Imran, "Assessment and feedback under disruptive circumstances in transnational education," in Proceedings of IEEE An International Conference on Engineering, Technology and Education (TALE' 2020), Online, Dec. 2020.

7. D. Bremner, I. S. Ansari, J. MacDougall, S. Hussain, M. Ma, J. Ponciano, X. Liu, and M. A. Imran, "A novel approach to policy development under disruptive circumstances using situation awareness and scenario planning in higher education," in Proceedings of IEEE An International Conference on Engineering, Technology and Education (TALE' 2020), Online, Dec. 2020.

8. M. Usman, M. Qaraqe, M. R. Asghar, I. S. Ansari, and F. Granelli, "Optimizing energy in WiFi direct based multi-hop D2D networks," in Proceedings of IEEE Global Communications Conference (GLOBECOM' 2020), Taipei, Taiwan, Dec. 2020.

9. M. A. Iqbal, I. S. Ansari, S. Hussain, H. Xing, Q. H. Abbasi, J. Qadir, and M. A. Imran, "Teaching continuity of electrical and computer engineering courses under covid-19 pandemic," in Proceedings of ACM SigcommEdu' 2020, USA, Aug. 2020.

10. R. Ghannam and I. S. Ansari, "Interactive tree map for visualising transnational engineering curricula," in Proceedings of IEEE Transnational Engineering Education using Technology Workshop (TREET' 2020), Glasgow, UK, Jul. 2020.

11. H. Lei, R. Guo, K.-H. Park, I. S. Ansari, K. J. Kim, and M.-S. Alouini, "Security performance analysis for the downlink NOMA systems with outage constraint," in Proceedings of IEEE International Conference on Communications (ICC' 2020) Workshop on Non-Orthogonal Mulitple Access for 5G (NOMA5G), Dublin, Ireland, Jun. 2020.

12. H. Lei, Y. Zhang, K.-H. Park, I. S. Ansari, G. Pan, and M.-S. Alouini, "On the performance of dual-hop RF-UWOC system," in Proceedings of IEEE International Conference on Communications (ICC' 2020) Workshop on Optical Wireless Communications, Dublin, Ireland, Jun. 2020.

13. M. Usman, M. Qaraqe, M. R. Asghar, and I. S. Ansari, "Energy efficient wireless body area networks: Proximity-based clustering in medical implants," in Proceedings of The 8th International Conference on Communications and Networking (ComNet' 2020), Hammamet, Tunisia, Mar. 2020.

14. H. Lei, W. Di, K.-H. Park, I. S. Ansari, G. Pan, and M.-S. Alouini, “On secure UAV communication systems with randomly located eavesdroppers,” in Proceedings of IEEE/CIC International Conference on Communications in China (ICCC’ 2019), Changchun, China, Aug. 2019.

15. H. Lei, Z. Yang, K.-H. Park, I. S. Ansari, G. Pan, and M.-S. Alouini, “On physical layer security of multiple-relay assisted NOMA systems,” in Proceedings of 5th International Workshop on Non-Orthogonal Multiple Access Techniques for 5G (NOMA5G) in IEEE International Conference on Communications (ICC’ 2019), Shanghai, China, May 2019.

16. M. Usman, M. R. Asghar, I. S. Ansari, F. Granelli, and M. Qaraqe, “Trust-based DoS mitigation technique for medical implants in wireless body area networks,” in Proceedings of IEEE International Conference on Communications (ICC’ 2019), Shanghai, China, May 2019.

17. S. Hussain, Q. H. Abbasi, I. S. Ansari, J. Qadir, and M. A. Imran, “Online interactivity tools to support student centered learning in large classes,” in Proceedings of 12th Annual University of Glasgow Learning and Teaching Conference, Glasgow, UK, Apr. 2019.

18. M. Usman, M. R. Asghar, I. S. Ansari, M. Qaraqe, and F. Granelli, “An energy consumption model for WiFi direct based D2D communications,” in Proceedings of IEEE Global Communications Conference (GLOBECOM’ 2018), Abu Dhabi, UAE, Dec. 2018.

19. I. U. Khan, I. M. Qureshi, M. A. Khan, S. B. H. Shah, I. S. Ansari, and M. H. Akhlaq, “Ant colony based optimization techniques to mitigate dynamic routing challenges in packet based networks,” in Proceedings of International Conference on Future Networks and Distributed Systems / International Workshop on Smart Technologies (ICFNDS / WOSTech’ 2018), Amman, Jordan, Jun. 2018.

20. M. Usman, M. R. Asghar, I. S. Ansari, F. Granelli, Q. Abbasi, and K. A. Qaraqe, “A marketplace for efficient and secure caching for IoT applications in 5G networks,” in Proceedings of IEEE Wireless Communications and Networking Conference (WCNC’ 2018), Barcelona, Spain, Apr. 2018.

21. V. K. Jagadeesh, V. Palliyembil, I. S. Ansari, P. M. Nathan, and K. A. Qaraqe, “Performance analysis of relay assisted mixed dual-hop RF-FSO transmission systems with pointing errors,” in Proceedings of International Telecommunications Conference (ITELCON’ 2017), Istanbul, Turkey, Dec. 2017.

22. V. K. Jagadeesh, V. Palliyembil, I. S. Ansari, P. M. Nathan, and K. A. Qaraqe, “Performance analysis of relaying FSO system over M-distributed turbulent channel with variable gain AF protocol,” in Proceedings of International Telecommunications Conference (ITELCON’ 2017), Istanbul, Turkey, Dec. 2017.

23. M. Usman, M. R. Asghar, I. S. Ansari, F. Granelli, and K. A. Qaraqe, "Towards energy efficient multi-hop D2D networks using WiFi direct," in Proceedings of IEEE Global Communications Conference (GLOBECOM' 2017), Singapore, Dec. 2017.

24. O. S. Badarneh, I. S. Ansari, M. Kadoch, and X. Yang, "Wireless power transfer in cooperative dual-hop relaying systems with beamforming over generalized fading channels," in Proceedings of 28th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio  Communications (PIMRC' 2017), Montreal, QC, Canada, Oct. 2017.

25. I. Sahnoun, I. S. Ansari, M. Abdallah, and K. Qaraqe, "Performance analysis of adaptive modulation in underwater visible light communications," in Proceedings of 24th International Conference on Software, Telecommunications and Computer Networks (SoftCOM' 2017), Split, Croatia, Sep. 2017.

26. H. Zhang, H. Lei, I. S. Ansari, G. Pan, Z. Ren, and K. A. Qaraqe, "Secrecy performance analysis with optimal DF relay selection of underlay CR networks over Nakagami-m fading channels," in Proceedings of IEEE International Conference on Communications (ICC' 2017), Paris, France, May 2017.

27. N. H. Mahmood, I. S. Ansari, P. Mogensen, and K. Qaraqe, "On the ergodic secrecy capacity with full duplex communication," in Proceedings of IEEE International Conference on Communications (ICC' 2017), Paris, France, May 2017.

28. M. Usman, M. R. Asghar, I. S. Ansari, and F. Granelli, "Towards bootstrapping trust in D2D using PGP and reputation mechanism," in Proceedings of IEEE International Conference on Communications (ICC' 2017), Paris, France, May 2017.

29. J. Zhang, X. Li, I. S. Ansari, Y. Liu, and K. A. Qaraqe, "Performance analysis of dual-hop DF satellite relaying over k-u shadowed fading channels," in Proceedings of IEEE Wireless Communications and Networking Conference (WCNC' 2017), San Francisco, CA, USA, Mar. 2017.

30. H. Lei, M. Xu, H. Zhang, G. Pan, I. S. Ansari, and K. A. Qaraqe, "Secrecy outage performance for underlay MIMO CRNs with energy harvesting and transmit antenna selection," in Proceedings of IEEE Global Communications Conference (GLOBECOM' 2016), Washington, DC, USA, Dec. 2016.

31. I. S. Ansari, M. M. Abdallah, M.-S. Alouini, and K. A. Qaraqe, "Outage analysis of asymmetric RF-FSO systems," in Proceedings of IEEE 84th Vehicular Technology Conference (VTC Fall' 2016),  Montreal, Canada, Sep. 2016.

32. H. Lei, I. S. Ansari, H. Zhang, K. A. Qaraqe, and G. Pan, "Security performance analysis of SIMO generalized-K fading channels using a mixture Gamma distribution," in Proceedings of IEEE 84th Vehicular Technology Conference (VTC Fall' 2016), Montreal, Canada, Sep. 2016.

33. N. H. Mahmood, I. S. Ansari, G. Berardinelli, P. Mogensen, and K. A. Qaraqe, "Analysing self interference cancellation in full duplex radios," in Proceedings of IEEE Wireless Communications and Networking Conference (WCNC' 2016), Doha, Qatar, Apr. 2016, pp. 1-6.

34. I. S. Ansari and M.-S. Alouini, "Asymptotic ergodic capacity analysis of composite lognormal shadowed channels," in Proceedings of IEEE 81st Vehicular Technology Conference (VTC Spring'  2015), Glasgow, Scotland, May 2015, pp. 1-5.

35. I. S. Ansari and M.-S. Alouini, "On the performance analysis of digital communications over Weibull-Gamma channels," in Proceedings of IEEE 81st Vehicular Technology Conference (VTC Spring' 2015), Glasgow, Scotland, May 2015, pp. 1-7.

36. I. S. Ansari, F. Yilmaz, and M.-S. Alouini, "Performance analysis of FSO links over unified Gamma-Gamma turbulence channels," in Proceedings of IEEE 81st Vehicular Technology Conference (VTC Spring' 2015), Glasgow, Scotland, May 2015, pp. 1-5.

37. E. Zedini, I. S. Ansari, and M.-S. Alouini, "Unified performance analysis of mixed line of sight RF-FSO fixed gain dual-hop transmission systems," in Proceedings of IEEE Wireless Communications and Networking Conference (WCNC' 2015), New Orleans, LA, USA, Mar. 2015, pp. 46-51.

38. E. Zedini, I. S. Ansari, and M.-S. Alouini, "On the performance of hybrid line of sight RF and RF-FSO fixed gain dual-hop transmission systems," in Proceedings of IEEE Global Communications Conference (GLOBECOM' 2014), Austin, TX, USA, Dec. 2014, pp. 2119-2124.

39. I. S. Ansari, M. M. Abdallah, M.-S. Alouini, and K. A. Qaraqe, "Outage performance analysis of underlay cognitive RF and FSO wireless channels," in Proceedings of 3rd International Workshop on Optical Wireless Communications (IWOW’ 2014), Funchal, Madeira Islands, Portugal, Sep. 2014, pp. 6-10.

40. I. S. Ansari, M.-S. Alouini, and J. Cheng, “On the capacity of FSO links under lognormal and Rician-lognormal turbulences”, in Proceedings of IEEE 80th Vehicular Technology Conference (VTC Fall’ 2014), Vancouver, Canada, Sep. 2014, pp. 1-6.

41. H. M. AlQuwaiee, I. S. Ansari, and M.-S. Alouini, "On the maximum and minimum of two modified Gamma-Gamma variates with applications," in Proceedings of IEEE Wireless Communications and Networking Conference (WCNC' 2014), Istanbul, Turkey, Apr. 2014, pp. 269-274.

42. I. S. Ansari, M. M. Abdallah, M.-S. Alouini, and K. A. Qaraqe, "A performance study of two hop transmission in mixed underlay RF and FSO fading channels," in Proceedings of IEEE Wireless Communications and Networking Conference (WCNC' 2014), Istanbul, Turkey, Apr. 2014, pp. 388-393.

43. H. M. AlQuwaiee, I. S. Ansari, and M.-S. Alouini, "On the performance of free space optical wireless communication systems over double generalized Gamma fading channel," in Proceedings of the 4th International Conference on Communications and Networking (COMNET' 2014), Hammamet, Tunisia, 19-22 Mar. 2014, pp. 1-5.

44. I. S. Ansari, F. Yilmaz, and M.-S. Alouini, “On the performance of hybrid RF and RF/FSO dual-hop transmission systems”, in Proceedings of 2nd International Workshop on Optical Wireless Communications (IWOW’ 2013), Newcastle Upon Tyne, UK, Oct. 2013, pp. 45-59.

45. I. S. Ansari, F. Yilmaz, and M.-S. Alouini, “On the performance of mixed RF/FSO variable gain dual-hop transmission systems with pointing errors”, in Proceedings of IEEE 78th Vehicular Technology Conference (VTC Fall’ 2013), Las Vegas, USA, Sep. 2013, pp. 1-5.

46. I. S. Ansari, F. Yilmaz, and M.-S. Alouini, “On the performance of mixed RF/FSO dual-hop transmission systems”, in Proceedings of IEEE 77th Vehicular Technology Conference (VTC Spring’ 2013), Dresden, Germany, Jun. 2013, pp. 1-5.

47. I. S. Ansari, F. Yilmaz, and M.-S. Alouini, “On the sum of squared eta-mu random variates with application to the performance of wireless communication systems”, in Proceedings of IEEE 77th Vehicular Technology Conference (VTC Spring’ 2013), Dresden, Germany, Jun. 2013, pp.1-6.

48. I. S. Ansari, F. Yilmaz, and M.-S. Alouini, “On the performance of hybrid RF and RF/FSO fixed gain dual-hop transmission systems," in Proceedings of The Second Saudi International Electronics, Communications and Photonics Conference (SIECPC' 2013), Riyadh, Saudi Arabia, Apr. 2013, pp. 1-6.

49. I. S. Ansari, F. Yilmaz, and M.-S. Alouini, “On the sum of Gamma random variates with application to the performance of maximal ratio combining over Nakagami-m fading channels”, in Proceedings of IEEE 13th Workshop on Signal Processing Advances in Wireless Communications (SPAWC’ 2012), Cesme, Turkey, 17-20 Jun. 2012, pp. 394-398.

50. I. S. Ansari, S. Al-Ahmadi, F. Yilmaz, M.-S. Alouini, and H. Yanikomeroglu, “An exact closed-form expression for the BER of binary modulations with dual-branch selection over generalized-K fading”, in Proceedings of IEEE 73rd Vehicular Technology Conference (VTC Spring’ 2011), Budapest, Hungary, 15-19 May 2011, pp. 1-4.

51. I. S. Ansari, “An implementation of traffic light system using multi-hop ad hoc networks”, in Proceedings of IEEE International Conference on Network-Based Information Systems (NBIS/ISEUPS’ 2009), Indianapolis, Indiana, US, 19-21 Aug. 2009, pp. 177-181.

52. I. S. Ansari, and A. S. Qutbuddin, “Biometrics for home networks security”, in Proceedings of IEEE Student Conference on Research and Development 2009 (SCOReD’ 2009), Malaysia, 16-18 Nov. 2009, pp. 136-138.

Dissertation: I. S. Ansari, On the Performance of Free-Space Optical Systems over Generalized Atmospheric Turbulence Channels with Pointing Errors, Electrical Engineering Program, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia, Feb. 2015.

Thesis: I. S. Ansari, Composite and Cascaded Generalized-K Fading Channel Modeling and Their Diversity and Performance Analyses, Electrical Engineering Program, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia, Dec. 2010.