一种新的循环平稳盲自适应波束形成方法

New cyclic blind adaptive beamforming method

循环平稳在阵列信号处理中的应用可以改善传统阵列信号处理方法仅仅利用空域先验信息对阵列误差敏感的缺点。但目前大部分的应用都是基于信号的循环频率已知的前提下进行处理 ,而在盲信号处理中 ,这一前提常常是不满足的。因此有必要研究在感兴趣信号的循环频率未知情况下的循环平稳盲信号处理问题。在现有的循环频率已知的循环平稳盲自适应波束形成方法的基础上提出一种新的盲信号处理方法 ,新方法不需要预先知道信号的循环频率。

Array beamforming techniques have been employed in digital communication systems to suppress co channel interference. Conventional array processing methods exploit spatial structure only and are severel influenced by mismatched array structures. Many researchers have utilized the cyclostationary properties of communication signals to overcome this defect. Most cyclostationary signal processing applications are based on the assumption that the cyclic frequency of the signal of interest is known a priori. This is not practical in real applications. A new cyclostationary blind adaptive beamforming algorithm is proposed, which does not need the cyclic frequencies beforehand. Computer simulations show the effectiveness of our method.