压缩感知理论应用于OFDM接收机系统的研究  

Application of Compressive Sensing in OFDM Receiver System

作　　者：王庆国[1] 王华力[2] 罗章凯[3] 苏国杰[1] 

机构地区：[1]解放军理工大学通信工程学院研究生1队,江苏南京210007 [2]解放军理工大学通信工程学院 [3]解放军理工大学通信工程学院研究生2队

出　　处：《军事通信技术》2014年第4期65-70,共6页Journal of Military Communications Technology

基　　金：国家自然科学基金资助项目(61271345)

摘　　要：压缩感知是一种新的采样理论,能够实现信号的无损低速采样,且只需信号在某个变换域内是稀疏的而具体位置可是未知的。文章基于正交频分复用(OFDM)信号在频域呈现出一定的稀疏性,将压缩感知理论应用到OFDM接收机中,提出了一种压缩感知OFDM接收机。理论分析表明该接收机性能主要依赖压缩感知的重构性能和判断域的选择。仿真验证了理论分析,在低信噪比环境中,采样率不低于奈奎斯特频率一半时,压缩感知OFDM接收机的性能优于传统OFDM接收机,有更好的抗噪声能力。Compressive Sensing（CS）is a new sampling theory,and can realize sampling blindly at a low speed,if only the signal is sparse in some domain without its location.This paper,based on the fact that Orthogonal Frequency Division Multiplexing（OFDM）signals are sparse in frequency domain,put forward a compressive sensing OFDM receiver by applying CS to OFDM receiver system.Theoretical analysis shows that the CS OFDM receiver is mostly impacted by reconstruction in CS and determine domain.Simulation results validate the theoretical analysis and show that when the SNR is low,and the sampling rate is not lower than half of the Nyquist rate,the performance of the CS OFDM receiver is better than the traditional OFDM receiver with a better ability to resist noise.

关 键 词：正交频分复用接收机 压缩感知 判断域 抗噪声 

分 类 号：TN911.72[电子电信—通信与信息系统]