Research

1. mmWave Quasi-Deterministic Channel Modeling based on Real Measurements

We @NIST released quasi-deterministic mmWave channel model software which has several functionalities as described below.

  • Multiple-Input Multiple-Output (MIMO) support

  • Configurable devices rotation and antennas orientation

  • New reference indoor and outdoor scenarios

  • New material libraries management, including NIST measurements-based, Task group 802.11ay measurements-based or custom libraries

2. 802.11ay WLAN Systems

We @NIST released physical layer model of IEEE 802.11ay enhanced directional multi-gigabit (EDMG) Wireless local access network (WLAN) which has several key features as described below.

      • IEEE 802.11ay Single Carrier/OFDM waveform generation

      • IEEE 802.11ay spatial multiplexing schemes: SU-SISO, SU-MIMO, MU-MIMO

      • Perform link-level bit error rate (BER), packet error rate (PER), data rate tests and analytical link-level spectral efficiency (SE) bound

      • Receiver algorithms: synchronization, channel estimation, carrier frequency offset (CFO) correction

3. 802.11bf Joint Sensing and Communication

4. THz-band Wireless Communication

5. Design and Analysis of Molecular Communication based Applications for Internet-of-Nano-Things

The prime research objectives are as follows:

      1. Design and analysis of multiple molecular transmitter-receiver communication in a blood vessel

      2. Design and analysis of hormonal molecular communication systems for long range (mm-m) communication within the human endocrine system

      3. Design and analysis of cooperative abnormality detection schemes for detecting abnormality inside the human body

      4. Design and analysis of localization and tracking techniques to monitor the disease locations in the body

6. Underlay Cognitive Radio based Satellite-Terrestrial Non-Cooperative/Cooperative Communication for Efficient Resource Utilization: Protocols Design and Performance Analysis

The prime objectives of this project are as follows:

      1. Study the integration of underlay cognitive radio (CR) in hybrid satellite-terrestrial communication systems with/ without relay cooperation for efficient use of the available resources.

      2. Study the impact of various MIMO transmission schemes such as orthogonal space-time block code (OSTBC), maximum ratio transmission (MRT), transmit antenna selection etc., on the performance of underlay CR based hybrid satellite-terrestrial networks.

      3. Design cooperative/ non-cooperative protocols in underlay CR based hybrid satellite-terrestrial networks with single and multiple antenna nodes in order to observe and enhance the end-to-end reliability, data rates while utilizing the spectrum efficiently.

      4. Study the impact of time-selective fading arising due to the node mobility, elevation angle under which the satellite is observed as well as imperfect channel estimates on the performance of cooperative/non-cooperative underlay CR based hybrid satellite-terrestrial systems over land mobile satellite (LMS) channels.

      5. To analyze the performance of these protocols under node mobility and channel estimation errors, in terms of the symbol error rate, SNR outage probability and Ergodic capacity etc., by deriving the analytical expressions and validating the derived results through simulations.

This Indian Space Research Organisation (ISRO) sponsored project has been completed in 2019-2020 and the complete report can be found below.

7. Cooperative Communication in Cellular Networks: Protocol Design and Performance Analysis

The prime objectives of this project are as follows:

      1. Design optimal relay selection based cooperative protocols in the cellular network to minimize the cost of synchronization overhead required for cooperation.

      2. Design path selection based cooperative protocols in the cellular network in order to achieve higher bandwidth efficiency.

      3. To analyze the performance of these protocols under channel uncertainty, in terms of the average bandwidth efficiency, symbol error rate, SNR outage probability and Ergodic capacity etc, by deriving the analytical expressions and validating the derived results through simulations.

This IIMA-IDEA Telecom Center of Excellence (IITCOE) sponsored project has been completed in 2016 and the interim report can be found below.

8. Development of algorithms for Narrow Band Interference reduction in IRNSS received signal

This Indian Space Research Organisation (ISRO) sponsored project has been completed in 2012 and the complete report can be found below. Mr. Shashank Kumar, who is currently working at Amazon, Seattle Washington, completed the DSP implementation part.