Patent ID: 7373127

Claim:
A method for a communications system comprising: shifting a phase of a quadrature down-converter reference signal utilizing a phase adjustment (Ψ n ) to phase shift an antenna element channel baseband signal for phase aligning the antenna element channel; maximizing a sum of an array coherent summation equation to determine an input signal angle of arrival wherein φ n is set equal to −Δφ n for each antenna element channel, wherein the φ n and the Δφ n are terms from the array coherent summation equation given as ∑ n = 0 N - 1 ⁢ y n ⁡ ( t ) ⁢ w n ⁢ ⅇ jφ n = ∑ n = 0 N - 1 ⁢ z ⁡ ( t ) ⁢ ⅇ j ⁡ [ ( ω 1 - ω lo ) ⁢ t + Δϕ ⁢ ⁢ n ] ⁢ w n ⁢ ⅇ jφ n ; and determining the φ n that maximizes the array coherent summation equation, wherein the Ψ n is set to the input signal angle of arrival values, wherein the Ψ n is set equal to φ n .