Testbeds:
OFDM empowered Sparse Code Multiple Access (SCMA) systems over GRURadio-USRP @ University of Essex, UK. 2025.
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.