DOA AND POWER ESTIMATION BY CONTROLLING THE ROOTS OF THE ANTENNA ARRAY POLYNOMIAL
Mohammad Jamil Mismar, Taiseer Hasan Ismail · Progress In Electromagnetics Research M · 2016
A new direction-of-arrival (DOA) and power estimation method of unknown number of source signals is proposed. The direction and power of coherent and/or noncoherent signals are estimated by controlling the roots of the array polynomial on the unit circle. The genetic algorithm is used to find the phases of the array polynomial roots that minimize the array output power. The pseudo-spectrum is obtained by phase rotation of the estimated roots, and the real power spectrum is derived from the pseudo-spectrum and the array factor. The results indicate that the direction of arrivals, power of the signals, and number of source signals are estimated from the real power spectrum.