Patent ID: 7859459

Claim:
A phased array receiver, comprising: a plurality of receive paths; a plurality of local oscillators, each configured to receive a digital reference phase signal and one of a plurality of independently generated digital phase control signals, each local oscillator having: an accumulator configured to repeatedly accumulate successive samples of said digital reference phase signal at an accumulation rate to generate a digital reference phase number; an adder configured to generate a digital sum by adding said digital reference phase number to a digital phase control number carried by one of said plurality of independently generated digital phase control signals; a converter configured to generate a sine wave having an intermediate frequency based on said accumulation rate and a phase based on said digital sum; and a low pass filter configured to generate a local oscillator signal by removing high-frequency components of said sine wave; a plurality of downconverters, each coupled to one of said plurality of local oscillators and each configured within one of said plurality of receive paths operable to downconvert a radio frequency signal received in said respective receive path to an intermediate frequency signal according to said respective local oscillator signal of said respective local oscillator; and a combiner configured to combine the intermediate frequency signals.