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arXiv 2405.04400cs.ITeess.SPmath.IT
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分布式 MIMO 中抑制系统外干扰的去中心化算法

Decentralized Algorithms for Out-of-System Interference Suppression in Distributed MIMO

Zakir Hussain Shaik, Erik G. Larsson

AI总结:

针对分布式 MIMO 中完全未知的系统外干扰,提出基于 Procrustes 旋转平均的 AP 链式分布式估计算法,以低前传负载达到接近集中式干扰抑制合并的性能。

摘要:

系统外(OoS)干扰对于工作在非授权频谱或频谱共享场景中的分布式网络而言,是一项潜在限制。OoS 干扰与系统内干扰的不同之处在于,OoS 信号及其相关信道(甚至其统计特性)完全未知。本文提出一种新型分布式算法,可在上行链路中缓解 OoS 干扰,并在下行链路中抑制 OoS 方向上的信号传输。为估计 OoS 干扰,每个接入点(AP)在接收到前一个 AP 给出的 OoS 干扰估计后,利用 Procrustes 方法通过旋转与平均计算出更优的 OoS 干扰估计,并将该估计转发给下一个 AP。该过程持续进行,直到中央处理单元(CPU)收到最终估计。我们的方法具有与完全集中式干扰抑制合并算法相当的性能,同时前传负载要求低得多。

英文摘要:

Out-of-system (OoS) interference is a potential limitation for distributed networks that operate in unlicensed spectrum or in a spectrum sharing scenario. The OoS interference differs from the in-system interference in that OoS signals and their associated channels (or even their statistics) are completely unknown. In this paper, we propose a novel distributed algorithm that can mitigate OoS interference in the uplink and suppress the signal transmission in the OoS direction in the downlink. To estimate the OoS interference, each access point (AP), upon receiving an estimate of OoS interference from a previous AP, computes a better estimate of OoS interference by rotate-and-average using Procrustes method and forwards the estimates to the next AP. This process continues until the central processing unit (CPU) receives the final estimate. Our method has comparable performance to that of a fully centralized interference rejection combining algorithm and has much lower fronthaul load requirements.

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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