DOA Estimation Algorithm for Weak Signals in the Presence of Strong Jamming
Qiu Lian · Radar Science and Technology · 2012
For the weak signal DOA estimation in the presence of strong jamming,a few-snapshot coherent DOA estimation algorithm in the presence strong jamming is proposed.The proposed algorithm uses the modified Toeplitz algorithm to de-correlate the coherent sources and then eliminate the effect of the strong jamming based on the jamming jam method(JJM),so the angles of the weak signals can be estimated.The proposed algorithm has good performance to restrain the nonstationary noise,and is suitable for the few snapshots environment.Furthermore,it has low computational load compared with the RELAX method and high-order cumulate method.Computer simulation results demonstrate the proposed algorithm has good bearing performance and can estimate the target signal spatial azimuth effectively in electronic warfare environment.