摘要
调制宽带转换器(Modulated Wideband Converter,MWC)是一种针对宽带稀疏模拟信号的压缩采样方法,它可以实现以远低于奈奎斯特率对宽带稀疏模拟信号进行无失真采样。针对MWC系统中最常用的同步正交匹配追踪(Simultaneous Orthogonal Matching Pursuit,SOMP)算法,利用正交投影思想更新观测矩阵,可以明显降低原子错误匹配概率。相比传统SOMP算法,该算法在信号通道数较少的情况下,可以明显提高支撑频带的恢复概率。通过不同宽带稀疏模拟信号在MWC系统下的仿真实验,表明该算法具有很好的恢复性能。
The MWC（ Modulated Wideband Converter） is a compressive sampling method for wideband spare analog signals,the wideband sparse analog signals can be sampled without distortion at a sampling rate which is far below Nyquist rate. For the most commonly used SOMP（ Simultaneous Orthogonal Matching Pursuit） recovery algorithm in the MWC system,the orthogonal projection strategy is employed to update the observation matrix in this paper and the probability of false atoms can be reduced obviously. Compared with traditional SOMP algorithm,the proposed algorithm can improve the recovery probability of support band obviously under the condition of less signal channels. Simulation results demonstrate its good performance for different wideband sparse analog signals in the MWC system.
出处
《电子信息对抗技术》
2015年第6期10-14,44,共6页
Electronic Information Warfare Technology
关键词
压缩采样
调制宽带转换器
正交投影
compressive sampling
modulated wideband converter
orthogonal projection
