通信学报2017，Vol.38Issue(11)：1-12,12.DOI:10.11959/j.issn.1000-436x.2017215
基于优化比特分配的有限反馈干扰对齐方案
Interference alignment based on optimizing bit allocation with limited feedback in interfering MIMO-MAC networks
摘要
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
干扰对齐/有限反馈/比特分配/量化误差/比特利用度Key words
interference alignment/limited feedback/bit allocation/quantization error/bit utilization分类
信息技术与安全科学引用本文复制引用
谢显中,李丹,雷维嘉,张森林..基于优化比特分配的有限反馈干扰对齐方案[J].通信学报,2017,38(11):1-12,12.基金项目
国家自然科学基金资助项目(No.61271259,No.61301123,No.61471076) （No.61271259,No.61301123,No.61471076）
重庆市教委科学技术研究基金资助项目(No.KJ130536) （No.KJ130536）
长江学者和创新团队发展计划基金资助项目(No.IRT1299) （No.IRT1299）
重庆市科委重点实验室专项基金资助项目(No.CSTC2012zbsy006) （No.CSTC2012zbsy006）
安徽省教育厅基金资助项目(No.AQKJ2015B008) The National Natural Science Foundation of China (No.61271259,No.61301123,No.61471076),The Science and Technology Research Project of Chongqing Education Commission (No.KJ130536),The Changjiang Scholars and Innovative Research Team Plan (No.IRT1299),The Special Fund of Chongqing Key Laboratory(No.CSTC2012zbsy006),The Project of Education Department of Anhui Province (No.AQKJ2015B008) （No.AQKJ2015B008）
