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Combining-Based Spatial Domain SIC Method in a FD MIMO System by Addition of an RF Chain
  • +2
  • Xuan Chen,
  • Vincent Savaux ,
  • Matthieu Crussière,
  • Patrick Savelli,
  • Kofi-Clément Yao
Xuan Chen
TDF, IETR UMR-6164, Univ. Rennes, INSA Rennes, CNRS, b<>com

Corresponding Author:[email protected]

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Vincent Savaux
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Matthieu Crussière
IETR UMR-6164, Univ. Rennes, INSA Rennes, CNRS
Patrick Savelli
b<>com
Kofi-Clément Yao
Lab-STICC, UMR 6285, CNRS

Abstract

In this paper, we propose and evaluate a spatial domain self-interference cancellation (SIC) method based on the principle of zero-forcing (ZF) beamforming for a generic multiple-input multiple-output (MIMO) full-duplex (FD) transceiver system in a large-scale communication scenario. The core of the proposed SIC method is to implement an additional radio-frequency (RF) chain at the receiver (RX) to induce an additional dimension on the channel matrix, so that the inversion of the channel matrix becomes feasible. To this end, we adapt, as an example, a simple ZF digital combiner in our system model to simultaneously perform SIC and enhance the communication link performance. Simulations results further confirm our proposal. In particular, our method demonstrates a strong SIC capability, even with an erroneous knowledge of the channel state information (CSI), and effectively improves the communication link performance of the FD system.
29 May 2024Submitted to TechRxiv
07 Jun 2024Published in TechRxiv