| Abstract: | A propagator-based algorithm for direction of arrival(DOA)estimation of noncoherent one-dimensional(1-D) non-circular sources is presented such as binary phase shift keying(BPSK) and amplitude modulation(AM). The algorithm achieves DOA estimation through searching a 1-D spectrum,which is newly formed on the basis of the rank reduction criterion,and works well without knowledge of the non-circular phases. And then,a searchfree implementation of the algorithm is also developed by using the polynomial rooting technique. According to the noncircular property,the algorithm can virtually enlarge the array aperture,thus significantly improving its estimation accuracy and enabling it to handle more sources than the number of sensors. Moreover,the algorithm requires no rotational invariance,so it can be applied to arbitrary array geometry and dispense with the high-complexity procedure of the eigen-decomposition of the correlation sample matrix. Finally,numerical simulations verify the performance and effectiveness of the proposed algorithm. |
