Estimation of the parameters and angle-of-arrival of wideband signals on sensor arrays based on the phase differentiation algorithm

Abstract

Phase differentiation algorithms represent a powerful tool for estimation of polynomial phase wideband signals parameters. They are used for development of a suboptimal algorithm for estimation of parameters of wideband signals received on a linear sensor array. The proposed suboptimal method is considered in the case of linear FM signal and compared with the chirp-beamformer approach. The proposed approach behaves slightly worse than the later. However, the chirp beamformer requires a 3D search procedure (or genetic algorithms) that is very consuming comparing to the 1D search for chirp-rate parameter and 2D search for carrier frequency and angle-of-arrival estimation. This approach can be generalized to the polynomial phase signals of higher order.