短波多径环境中一种DOA方法

A DOA Method Under Multipath Environment in SW Communication

短波通信存在着多径衰落和干扰的问题，影响了通信的质量。通过使用智能天线，可以提高通信质量和可靠性。但是短波多径环境中会产生多个相干信号，造成智能天线的波达方向（DOA）识剥模糊。本文利用短波信号的循环平稳特性，结合均匀线性阵列，提出了在短波环境中识别DOA的前向空间平滑Cyclic Music方法。

Multipath fading and interference in shortwave communication affect the quality of communication. The quality and the reliabilty of communication could be improved by the use of smart antenna. However, some coherent signals arising in multipath environment will result in ambiguous identification of direction of arrival （DOA） of smart antenna. By utilizing the cyclostationarity of short wave signal and uniform linear array, this paper proposes the method of forward spatial smoothing Cyclic Music to identify DOA in short wave environment.