Transceiver optimization for multiuser multiple-input multiple-output full-duplex amplify-and-forward relay downlink communications
Date
2024
Authors
Shao, Yunlong
Gulliver, Aaron
Journal Title
Journal ISSN
Volume Title
Publisher
Telecom
Abstract
This paper considers the transceiver design in a multiuser multiple-input multiple-output (MIMO) full-duplex (FD) amplify-and-forward (AF) relay downlink communication system, where users simultaneously transmit data via an FD relay node. The design incorporates an imperfect loop interference (LI) cancellation which results in a residual LI. Linear precoders are employed at the sources and relay, and minimum mean-squared-error (MMSE) combiners are employed at the destinations to mitigate the effect of the residual LI. The corresponding design problem is highly nonconvex, so a closed-form solution is intractable. Thus, an iterative method is developed to solve this optimization problem. Simulation results are presented which show that the proposed iterative algorithm provides better performance than the corresponding half-duplex (HD) solution in terms of the achievable rate under residual LI.
Description
Keywords
amplify and forward (AF), capacity, downlink, full-duplex (FD), loop interference (LI), MIMO, transceiver
Citation
Shao, Y., & Gulliver, T. A. (2024). Transceiver optimization for multiuser multiple-input multiple-output full-duplex amplify-and-forward relay downlink communications. Telecom, 5(1), 216–227. https://doi.org/10.3390/telecom5010011