期刊文献+

认知无线电NC-OFDM系统中基于压缩感知的信道估计新方法 被引量:18

Compressive sensing based channel estimation for NC-OFDM systems in cognitive radio context
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摘要 提出了一种基于压缩感知(CS,compressive sensing)理论的不连续子载波正交频分复用(NC-OFDM,non-contiguous orthogonal frequency division multiplexing)系统信道估计新方法,全面研究了认知无线电NC-OFDM系统CS信道估计的理论框架、导频图案的设计、信道估计算法,并依据CS测量矩阵设计理论提出了测量矩阵互相关最小化的导频图案优化准则。仿真结果表明,同已有的NC-OFDM系统信道估计方法相比,CS信道估计能够在多种禁用子载波场景下,使用较少导频获得很好的信道估计性能。 A new channel estimation based on compressive sensing(CS) in non-contiguous orthogonal frequency division multiplexing(NC-OFDM) system was proposed.As for NC-OFDM systems in cognitive radio context,the infrastructure of CS-based channel estimation,the design of pilot patterns and the algorithm of channel estimation were explored.Es-pecially,a criterion of optimizing pilot pattern in the CS-based channel estimation was proposed by minimizing the mu-tual coherence of the measurement matrix in CS theory.Simulations show that,under many patterns of deactivated sub-carriers,CS-based channel estimation obtains much better performance than existing NC-OFDM channel estimation methods in terms of the mean square error of the channel estimate as well as the bit error rate of the system.
出处 《通信学报》 EI CSCD 北大核心 2011年第11期85-94,共10页 Journal on Communications
基金 国家自然科学基金资助项目(60972041 60872104) 江苏省高校自然科学基础研究计划重大项目(08KJD510001) 教育部博士点基金资助项目(200802930004) 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) 国家重点基础研究发展计划("973"计划)基金资助项目(2007CB310607) 江苏省高校研究生创新计划项目(CXZZ11_0385)~~
关键词 认知无线电 不连续子载波正交频分复用 压缩感知 信道估计 cognitive radio NC-OFDM compressive sensing channel estimation
作者简介 何雪云(1978-),女,安徽铜陵人,南京邮电大学讲师、在读博士生,主要研究方向为宽带无线通信理论与技术。 宋荣方(1964-),男,江苏武进人,南京邮电大学教授、博士生导师,主要研究方向为宽带无线通信理论与技术。 周克琴(1975-),女,四川成都人,南京邮电大学讲师、在读博士生,主要研究方向为宽带无线通信理论与技术。
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共引文献715

同被引文献129

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引证文献18

二级引证文献59

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