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arXiv 2112.08970cs.ITeess.SPmath.IT
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宽带全双工MIMO系统的模数联合收发器设计

Joint Analog and Digital Transceiver Design for Wideband Full Duplex MIMO Systems

Md Atiqul Islam, George C. Alexandropoulos, Besma Smida

摘要:

在本文中,我们提出了一种宽带全双工(FD)多输入多输出(MIMO)通信系统,包括一个FD MIMO节点同时与两个多天线上行链路(UL)和下行链路(DL)节点利用相同的时间和频率资源进行通信。为了抑制FD MIMO系统中由于同时发送和接收而产生的强自干扰(SI)信号,提出了一种基于基带正交频分复用(OFDM)信号建模的模拟和数字(A/D)相消以及发送和接收波束形成的联合设计。考虑到实际的发射机损伤,我们提出了一种多抽头宽带模拟消除器的架构,其抽头的数量不与收发器天线和多径SI组件的数量成比例。我们还提出了一种新的自适应数字抵消截断奇异值分解的基础上,减少残留SI信号估计参数。为了最大化FD和速率,提出了一种用于A/D抵消和数字波束形成的联合优化框架。最后,我们广泛的波形仿真结果表明,所提出的宽带FD MIMO设计具有更高的SI消除能力,降低了复杂度相比,现有的消除技术,从而提高可实现的速率性能。

英文摘要:

In this paper, we propose a wideband Full Duplex (FD) Multiple-Input Multiple-Output (MIMO) communication system comprising of an FD MIMO node simultaneously communicating with two multi-antenna UpLink (UL) and DownLink (DL) nodes utilizing the same time and frequency resources. To suppress the strong Self-Interference (SI) signal due to simultaneous transmission and reception in FD MIMO systems, we propose a joint design of Analog and Digital (A/D) cancellation as well as transmit and receive beamforming capitalizing on baseband Orthogonal Frequency-Division Multiplexing (OFDM) signal modeling. Considering practical transmitter impairments, we present a multi-tap wideband analog canceller architecture whose number of taps does not scale with the number of transceiver antennas and multipath SI components. We also propose a novel adaptive digital cancellation based on truncated singular value decomposition that reduces the residual SI signal estimation parameters. To maximize the FD sum rate, a joint optimization framework is presented for A/D cancellation and digital beamforming. Finally, our extensive waveform simulation results demonstrate that the proposed wideband FD MIMO design exhibits higher SI cancellation capability with reduced complexity compared to existing cancellation techniques, resulting in improved achievable rate performance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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