Spatial Transmit Diversity for GFDM via Low Complexity Transceiver Design

• Published in: 2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring) pp. 1 - 5
• Main Authors: Khan, M. Qurratulain, Danish Nisar, M.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.04.2021
• Subjects: 5G Systems; Fading channels; Generalized Frequency Division Multiplexing; Low-Complexity GFDM; MIMO; Robustness; Space-Time Coding; Spectral efficiency; Transceivers; Transmitting antennas; Vehicular and wireless technologies; Wireless communication
• DOI: 10.1109/VTC2021-Spring51267.2021.9448721

Generalized frequency division multiplexing (GFDM) is a novel multi-carrier technique that provides the flexibility required by various emerging applications, thanks to the low out-of-band emissions due to better prototype filters and lower loss in spectral efficiency due to combined cyclic prefix for a group of sub-symbols. To improve robustness in multipath fading wireless channels, GFDM can be combined with transmit and receive multi-antenna diversity. In this work, we propose a generic framework for achieving multi-antenna transmit diversity in GFDM via standard orthogonal space time block codes in combination with time reversal coding and simple linear receivers. We have shown the attainment of full diversity order for four and eight transmit antennas. Appropriate array and diversity gains are also achieved by increasing the number of antennas at receiver side. Moreover, a mechanism to reduce GFDM transceiver computational complexity via the use of chirp Z-transform has been proposed along with benchmarking with prior works.