Abstract:

A new algorithm called ‘Root-ISM algorithm’ is proposed in this paper based on the ISM algorithm for the large amount of calculation and poor performance of the traditional ISM algorithm in condition of low SNR in wideband incoherent signal DOA estimation.The algorithm not only effectively reduces the amount of calculation,but also achieves a better performance of DOA estimation than the traditional ISM algorithm.The new algorithm is improved by combining two existing algorithms.The simulation has verified that the improved algorithms based on Root-ISM algorithm can further improve the performance of DOA estimation.

Key words: direction of arrive;Root-ISM algorithm;estimation performance