Direction-of-Arrival Estimation of Closely Spaced Emitters Using Compact Arrays
Summary of DOA estimations using MPM for a four-element ULA with the number of array elements varying from 6 to 20. Three equal-power incoming signals are from the directions of to , , and with an SNR of 5 dB. The step size of is considered. The figures show the average biases of the estimated directions with array aperture (a) , (b) , (c) , and (d) .