利用有限字符集的数字信号压缩感知模型  

Compressed sensing of digital signals with finite alphabets

作　　者：邢政利 周劼[1] 叶江峰[1] 严俊[1] 邹麟[2] 万群[2] Xing Zhengli;Zhou Jie;Ye Jiangfeng;Yan Jun;Zou Lin;Wan Qun(Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang Sichuan 621999,China;School of Electronic Engineering,University of Electronic Science&Technology of China,Chengdu 611731,China)

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621999 [2]电子科技大学电子工程学院,成都611731

出　　处：《计算机应用研究》2018年第3期863-865,共3页Application Research of Computers

基　　金：国家自然科学基金委员会-中国工程物理研究院NSAF联合基金资助项目(U153010137)

摘　　要：针对具有有限字符集特征的数字信号,研究了其压缩感知方法;同时研究了多进制相移键控(M-PSK),利用其有限字符集特征对其进行亚奈奎斯特采样并重构。在提出的模型中,有限字符集信号所需采样率与符号率成正比,且远低于奈奎斯特率。数值仿真表明,通过利用有限字符集特征,可以对相应数字信号进行有效的压缩采样。This paper investigated the compressed sensing of digital signals with finite alphabets.More specifically,it sutdied multiple-phase-shift-keying(M-PSK)alphabet.Exploring the finite alphabets character,the sampling procedure could be achieved at Sub-Nyquist rate.Considering the modulation procedure,the model also could serve to a joint demodulation model.Furthermore,the sampling rate required here scaled with the symbol rate,which was much lower than the Nyquist rate.Numerical simulations verified its validity.And the simulation conclusion shows that,utilizing the finite alphabets character,compressed sensing theory also applies to the digital signal.

关 键 词：压缩感知 有限字符集 数字信号 

分 类 号：TN911.72[电子电信—通信与信息系统]