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基于压缩感知的MIMO-OFDM系统信道状态信息反馈方案研究 被引量:7

Study on Compressed Sensing Based CSI Feedback Scheme for MIMO-OFDM Systems
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摘要 在MIMO-OFDM系统中,信道状态信息反馈技术是现在的研究热点。在研究了3GPP-LTE系统中使用的一些信道状态信息反馈方案的基础上,提出了一种基于最新的压缩感知技术的反馈方案。该方案中利用高速数字信道频域的稀疏性,通过压缩感知算法重建反馈的信道状态信息,有效减少了系统处理复杂度和传输的数据量。仿真证明,在反馈量相同的前提下,新方案的系统容量和误码率性能都优于传统的基于码本的反馈方案。 In MIMOOFDM systems, channel state information (CSI) feedback technology is a hot research spot. Based on some existing CSI feedback schemes in 3GPPLTE system, a novel compressed sensing based feedback scheme is proposed. Considering the frequency domain sparsity of highspeed digital channels, the scheme employs a compressed sensing algorithm to reconstruct the feedback CSI so that the system processing complexity and the transmitted amount of data can be reduced effectively. Simula- tion results have shown that, with the same amount of feedback data, the proposed scheme is superior to the conventional codebookbased scheme in terms of both system capacity and bit error rate.
出处 《南京邮电大学学报(自然科学版)》 北大核心 2012年第1期54-58,共5页 Journal of Nanjing University of Posts and Telecommunications:Natural Science Edition
基金 国家重点基础研究发展计划(973计划)(2007CB310607) 国家自然科学基金(60972041) 江苏省高校自然科学基础研究计划重大项目(08KJD510001) 教育部博士点基金(20080293004) 东南大学移动通信国家重点实验室开放课题(N200809) 国家科技重大专项(2009ZX03003-006) 研究生创新计划(CX10B_186Z)资助项目
关键词 多输入多输出 正交频分复用 压缩感知 信道状态信息反馈 MIMO OFDM compressed sensing CSI feedback
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