基于二维恒模算法的直达波提纯技术

The purification technology based on 2D constant modulus algorithm for direct waves

为了有效提取被多径杂波污染的直达波信号，采用了二维恒模盲均衡算法。该算法采用多天线多通道接收直达波信号，并综合利用接收信号的空域和时域信息。进一步采用变步长方法提高了算法的收敛速度，获得了较好的提纯效果。实验结果表明，改进的方法能较好地提纯被多径杂波污染的直达波信号，更具优越性。

The 2D constant modulus algorithm （CMA） is adopted to effectively purify direct wave signals polluted by muhipath clutters. The direct wave signals are received through multiple antennas and channels, and the algorithm comprehensively utilizing the space-and time-domain information of signals. Besides, the variable step lengths are adopted to increase the convergence rate and obtain better purification results. The simulation results show that the improved algorithm is superior in purifying direct wave signals polluted by muhipath clutters.