HIGH RESOLUTION DOA ESTIMATION METHOD AND SYSTEM

摘要

The present invention applies to the technical field of MIMO radars. A high resolution DOA estimation method and system. The method comprises the following steps: all receive antennas receiving transmitted signals reflected by target sources (A); scanning a received signal of each receive antenna by using each transmitted signal (B); separately multiplying the scanned signal by the transmitted signal to obtain a phase corresponding to each peak signal in the received signal of each receive antenna (C); constructing a virtual received signal according to the obtained phase and the transmitted signal to serve as an obtained virtual extended signal (D); and forming a new received signal by the virtual extended signal and the original received signal, and calculating a covariance and a Capon beamforming coefficient of the new received signal, so as to complete DOA estimation (E). By means of the method, the estimation accuracy is improved and the number of target sources that can be estimated is increased without adding antennas.