DS-CDMA系统基于高阶累积量的盲波束形成及DOA估计

Blind Beamforming and DOA Estimation for DS-CDMA System Based on Higher Order Cumulant

依据DS-CDMA系统的扩频码和扰码特性,提出了一种新的基于高阶量的盲波束形成算法,然后根据得到的波束形成权值实时估计信号波达方向(DOA)。该方法充分利用了接收信号的高阶统计特性,在高斯有色噪声及非高斯噪声信道环境下具有良好的性能。另外,该算法不需要已知信道参数和训练序列等先验知识,收敛速度较快,适合在实际信道环境中的应用。

According to the characters of spread spectrum code and scrambling code, a new algorithm of blind beamforming and DOA estimation based on higher order cumulant is proposed in the paper. In Gaussian color noise or non - Gaussian situations, the approach we presented, without the need of channel parameters or training sequence, has higher estimation accuracy and faster convergence.