下行MIMO广播信道中基于偏袒干扰消除的回溯干扰对齐方案

doi:10.11959/j.issn.1000-436x.2021092

Abstract

Abstract:

For interference networks, the degree of delay (DoD) was proposed to quantify the information delay among traditional interference alignment (IA) schemes.It indicated that networks suffer from the issue of latency caused by IA schemes.Herein, for the MIMO downlink broadcast channel (BC), the partial interference elimination based retrospective interference alignment scheme (PIE-RIA) was put forward.In the scheme, relay technique was adopted to eliminate partial interference signals so that part of desired symbols could be decoded promptly in user sides.Meanwhile, in the last slot, the eliminated signals could be regenerated in base station side with the retrospective interference alignment (RIA) scheme .The simulation results show that PIE-RIA scheme maintains degree of freedom (DoF) gain of RIA scheme and in the meantime, achieves lower DoD than the other schemes.

Key words: delay sensitive network, retrospective interference alignment, partial interference elimination, degree of freedom, degree of delay

CLC Number:

TN919.1

Jingfu LI, Wenjiang FENG, Wenshou WANG, Weiheng JIANG, Chonghai YANG. Partial interference elimination based retrospective interference alignment scheme in the downlink MIMO broadcast channel[J]. Journal on Communications, 2021, 42(6): 94-106.

Figures/Tables 11

References 30

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Partial interference elimination based retrospective interference alignment scheme in the downlink MIMO broadcast channel

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