CAJ | 학술논문

采用基于信号处理领域最近兴起的压缩感知理论对 NC-OFDM 系统进行信道估计，并将回溯迭代自适应正交匹配追踪算法（ BAOMP ）应用到 NC-OFDM 系统的信道估计中，该算法在每次回溯迭代中核查所选原子的可靠性并删除不可靠原子。理论分析和仿真实验表明， BAOMP 算法不但可以减少导频的数目，而且其在保持 OMP 类算法优点的同时，有着更好的重构性能，且不需要预先知道稀疏度 K。
채용기우신호처리영역최근흥기적압축감지이론대 NC-OFDM 계통진행신도고계，병장회소질대자괄응정교필배추종산법（ BAOMP ）응용도 NC-OFDM 계통적신도고계중，해산법재매차회소질대중핵사소선원자적가고성병산제불가고원자。이론분석화방진실험표명， BAOMP 산법불단가이감소도빈적수목，이차기재보지 OMP 류산법우점적동시，유착경호적중구성능，차불수요예선지도희소도 K。
This paper is based on the lately rising compressing sensing theory , studying channel estimation for NC-OFDM sys-tem and using BAOMP algorithm to NC-OFDM system ’ s channel estimation . It detects the previous chosen atoms ’ reliability and then deletes the unreliable atoms at each backtracking iteration . Simulation and theoretical analysis shows that BAOMP algorithm can reduce the pilots number . Besides , BAOMP not only has the advantages of the OMP-type but also has superior performance of signal construction . Besides , it doesn ’ t need to know the sparsity level K .