a low-complex setup for doa estimation of coherent signals of unknown sources located at endfire angles

in order to estimate doa of coherent sources, shirvani moghaddam and keshavarz nasab proposed a method based on uniform linear array configuration that first determines the number of noncoherent sources and then estimates the doa of coherent signals in each group. for estimating doas close to the array endfire, ula does not perform well. as the main goal of this investigation, using the proposed threshold-based jade-music algorithm, a new method is proposed which divides angles in two parts. simulation results demonstrate this new proposed scenario offers higher performance for doa estimation of narrowband signals with respect to ula and ca configurations. also, its computational load is less than other realizations.