基于空域滤波的方向波数域测向测频新方法

Novel method of angle and frequency estimation in direction wavenumber region using space filtering

针对宽带接收机对窄带信号进行到达角(DOA)和频率估计问题,提出了信号的方向波数概念,并将信号的导向矢量表示成方向波数的函数,进而提出了方向波数域MUSIC算法以达到在方向波数域分离空间信号的目的。为了准确估计信号的频率和DOA,提出了利用空域滤波实现不同方向波数信号的分离,并利用快速傅立叶变换进行相应信号频率的测量,进而利用方向波数定义式计算出信号的DOA,实现了信号DOA和频率的准确、快速估计。最后的仿真分析验证了所提出方法的正确性和有效性。

For the problem of the direction of arrive (DOA) and frequency united estimation of narrow band signal for wide band receiver,the concept of signal direction wavenumber is proposed. The signal steering vector is expressed as the function of its direction wavenumber,then the MUSIC algorithm in direction wavenumber region is proposed and is used to separate space signal. In order to estimate the signal frequency and DOA,the space filtering is used to separate the signals with different direction wavenumber,an...