基于小波与SSWIA的单通道混合信号个数估计算法

Source Number Estimation Algorithm in Single Channel Based on Wavelet and SSWIA

针对单通道混合信号个数估计这一问题，提出了一种基于小波与方正弦波差值算法（SSWIA）的单通道混合信号个数估计算法。该算法条理清晰，通过对接收的混合信号数据进行小波变换及小波降噪来提取其码元跳变点的时间序列，而后将时间序列用SS．WIA处理后得到含有信号码元信息的谱线。同时，文章验证了在大数据量情况下，采取合适的降噪阈值若损失了部分码元信息对算法的性能没有影响。最后，仿真验证了此文算法的有效性且性能较Teager能量算子高。

According to the problem of source number estimation of co-channel signals, based on wavelet and SSWIA（Square Sine Wave Interpolating Algorithm） is proposed. per, the algorithm is distinct, through doing wavelet transform and wavelet denoising to signals data in order to extract the time point of chip rate, after disposing the time array an algorithm In this pa- the received through SS- WIA and receiving the spectrum-line which included the information of chip rate. At the same time, the conclusion is proved, with a large data, the suitable threshold for denoising will not influence the algorithm＇ s property if it lose part of the chip rate information. Finally, the efficiency of this algorithm is proved through simulation and it＇s performance is higher than Teager energy operation