Simultaneous Data Communication and Channel Estimation in Multi-User Full Duplex MIMO Systems

TL;DR

This paper introduces a novel multi-user full duplex MIMO scheme that enables simultaneous data transmission and channel estimation, significantly improving throughput and reducing hardware complexity.

Contribution

It presents a new joint beamforming and SI cancellation design for FD MIMO systems that enhances sum rate performance and reduces hardware complexity.

Findings

Outperforms half duplex systems in sum rate.

Achieves 50% reduction in hardware complexity.

Demonstrates effectiveness through simulations.

Abstract

In this paper, we study Simultaneous Communication of Data and Control (SCDC) information signals in Full Duplex (FD) Multiple-Input Multiple-Output (MIMO) wireless systems. In particular, considering an FD MIMO base station serving multiple single-antenna FD users, a novel multi-user communication scheme for simultaneous DownLink (DL) beamformed data transmission and UpLink (UL) pilot-assisted channel estimation is presented. Capitalizing on a recent FD MIMO hardware architecture with reduced complexity self-interference analog cancellation, we jointly design the base station's transmit and receive beamforming matrices as well as the settings for the multiple analog taps and the digital SI canceller with the objective to maximize the DL sum rate. Our simulation results showcase that the proposed approach outperforms its conventional half duplex counterpart with 50% reduction in hardware complexity compared to the latest FD-based SCDC schemes.