Testbeds:
AFDM Goes Over the Air: Possibly the World's First Real-time USRP Hardware Demonstrator of AFDM @ University of Essex, UK. May 2026. Please click here to see our description of this demo in LinkedIn. Click here to see our AFDM demonstrator poster.
OFDM empowered Sparse Code Multiple Access (SCMA) systems over GRURadio-USRP @ University of Essex, UK. 2025. Please click here to see our OFDM-SCMA USRP testbed poster.
Picture transmission demo: simultaneous transmission of six colorful pictures upon 802.11p-OFDM frame structure.
Video transmission demo: simultaneous transmission of two animations upon 802.11p-OFDM frame structure.
Demonstration of Sparse Code Multiple Access (SCMA) system over Labview-USRP2 platform @ 5G Innovation Centre, University of Surrey, UK (2019).
Notes:
D2.5 of the H2020 EU-Taiwan project “Converged Wireless Access for Reliable 5G MTC for Factories of Future - Clear5G” (61745, clear5g.eu).
SCMA is an overloaded code-domain NOMA scheme which exploits the sparsity of codebooks for efficient ML-approaching decoding. The original idea of SCMA is called low-density signatures (LDS) CDMA invented by researchers at University of Surrey in the following TSP'2018 paper: "Novel low-density signature forsynchronous CDMA systems over AWGN channels".
Demonstration of Network-Coded Cooperative Relaying for Range Extension and Diversity Enhancement Over USRP2 platform @ School of EEE, Nanyang Technological University (NTU), Singapore (2016).
Notes:
CRC-aided Decode-and-Forward (DF), i.e., each relay decodes the picture message from the source followed by CRC check. If no errors are found, encoded and forward the message to the destination receiver; otherwise, stop transmission.
Modulation: QPSK based single-carrier frequency-domain equalization (SC-FDE). Linear MMSE equalization.
Network Coding scheme on top: BATS encoding at the source + P2P Cooperation and BATS decoding at the destinations.
Publications:
K. Jiang, Z. Liu, P. Yang, Y. Xiao, and S. Li, "An Experimental Investigation of Enhanced SM-OFDM Over Indoor Rician Multipath Channels," IEEE Transactions on Vehicular Technology, vol. 69, no. 2, pp. 2291-2295, Feb. 2020.
S. Hu, Q. Luo, F. Li, Z. Liu, Y. Gao, and J. Wu, “Practical Implementation of Multi-user Transform Domain Communication System on Control Channels in Cloud-based Cognitive Radio Networks,” IEEE Access, vol. 6, pp. 17010-17021, Jan. 2018.
S. Hu, Q. Luo, J. Zhang, Z. Liu, D. Huang, and Y. Gao, "Practical Implementation of MIMO-FBMC System," in The International Conference on Communications, Signal Processing, and Systems (CSPS'2018), 14-16 July, 2018, Dalian, China.