Interference alignment based on optimizing bit allocation with limited feedback in interfering MIMO-MAC networks

Xian-zhong XIE; Dan LI; Wei-jia LEI; Sen-lin ZHANG

doi:10.11959/j.issn.1000-436x.2017215

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Interference alignment based on optimizing bit allocation with limited feedback in interfering MIMO-MAC networks

Papers | 更新时间：2024-06-05

- Interference alignment based on optimizing bit allocation with limited feedback in interfering MIMO-MAC networks
- Journal on Communications Vol. 38, Issue 11, Pages: 1-12(2017)
- 作者机构：
  
  重庆邮电大学个人通信研究所，重庆 400065
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61271259);The National Natural Science Foundation of China(61301123);The National Natural Science Foundation of China(61471076);The Science and Technology Research Project of Chongqing Education Commission(KJ130536);The Program for Changjiang Scholars and Innovative Research Team in University(IRT1299);The Special Fund of Chongqing Key Laboratory(CSTC2012zbsy006);The Project of Anhui Education Department(AQKJ2015B008)
- DOI：10.11959/j.issn.1000-436x.2017215
  CLC： TN929.53
- Online First：2017-11，
  
  Published：25 November 2017
- 稿件说明：
移动端阅览
Xian-zhong XIE, Dan LI, Wei-jia LEI, et al. Interference alignment based on optimizing bit allocation with limited feedback in interfering MIMO-MAC networks[J]. Journal on Communications, 2017, 38(11): 1-12.
DOI：

Xian-zhong XIE, Dan LI, Wei-jia LEI, et al. Interference alignment based on optimizing bit allocation with limited feedback in interfering MIMO-MAC networks[J]. Journal on Communications, 2017, 38(11): 1-12. DOI： 10.11959/j.issn.1000-436x.2017215.

摘要

针对多小区MIMO上行链路中有限反馈干扰对齐方案的不足，给出一种基于优化比特分配的有限反馈干扰对齐方案。为克服低 SNR 时频谱效率的损失，通过最大化用户的信号功率与泄露到其他小区的干扰与噪声功率之和的比值来求预编码，基于最大化每个数据流的信干噪比来设计干扰抑制矩阵。进一步，为克服传统比特分配方案反馈比特利用度不高的问题，给出一种新颖的比特分配方案来改善比特分布，减小了量化误差的影响。仿真实验表明，本算法能有效减少量化误差对系统性能的影响并显著提高系统的比特利用率，使有限反馈CSI时的干扰对齐性能得以提升。

Abstract

A novel limited feedback for interference alignment algorithm was proposed based on the disadvantages of traditional limited feedback interference alignment schemes for MIMO uplink.Unlike the traditional linear interference alignment

an iterative scheme was presented.The pre-coder was designed through maximizing the target signal to the interference leakage and noise ratio

and interference suppression matrix was designed by maximizing the signal to interference plus noise ratio for each data stream

which can come over rate loss in low SNR.In addition

the bit allocation of traditional limited feedback schemes were based on the mean of interference leakage

which were not perfect and make the total number of the effective bits less than the bits provided by system.Thus

a novel bit allocation scheme was provided that improving bit utilize and decreasing quantization error.Theoretical analysis and simulation experiments show that compare to the existed classical algorithms

the algorithm was a stepwise enhancement of signal quality for iterative search in perfect CSI which was better than linear algorithm and has a larger space with no need for strictly align interference in limited feedback CSI which reduces the influence of quantization error more.The effective bit distribution and bit utilization are improved by bit allocation

resulting in improved performance in limited feedback.

关键词

Keywords

references

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