CAJ | 학술논문

多分量LFM信号源个数估计是进行后续信号处理的基础。考虑到压缩测量值较好地保留了原信号的特征信息，基于压缩感知部分重构的思想，提出了一种基于压缩感知和OMP分解的信源个数估计算法，算法在基于OMP的信号重构算法上改进而来，以归一化残差为迭代终止的条件，引入一种自适应阈值选择策略，根据迭代分解次数进行信号源个数估计。仿真结果表明，在信噪比为-3 db左右、压缩比大于0.25的情况下，该算法进行信源个数估计的成功率高于90%。
다분량LFM신호원개수고계시진행후속신호처리적기출。고필도압축측량치교호지보류료원신호적특정신식，기우압축감지부분중구적사상，제출료일충기우압축감지화OMP분해적신원개수고계산법，산법재기우OMP적신호중구산법상개진이래，이귀일화잔차위질대종지적조건，인입일충자괄응역치선택책략，근거질대분해차수진행신호원개수고계。방진결과표명，재신조비위-3 db좌우、압축비대우0.25적정황하，해산법진행신원개수고계적성공솔고우90%。
The source number estimation of multi-resource LFM signals is the base of subsequent signal analysis. Considering the compressed measurements which could maintain the feature infor-mation of the original signal, a source number estimation algorithm based on compressed sensing and OMP decomposition is proposed. The algorithm for estimating the source number according the iteration number based on the improved OMP and the iteration termination threshold could be estimated with an adaptive strategy. Experiments results show that the proposed algorithm could obtain high correct rate under the conderation SNR≥-3dB and compression ratio M/N≥0. 25.