A radio frequency receiver includes a first and second analog to digital converter (ADC) connected in parallel. Each ADC is coupled to a corresponding mixer that receives a local oscillator (LO) frequency signal and an analog input signal. Each LO down-converts the analog input signal to a band of frequencies falling within the band of operation of the LO's corresponding ADC. The frequency is selected such that each LO down-converts the input signal such that a portion of the operating band of each LO overlaps. For frequencies falling within the overlapped region, each ADC samples the overlapped frequency band and the corresponding outputs of the parallel ADCs are coherently summed to provide an output having up to about 3 dB improvement in SNR. For sampled frequencies outside the overlapped frequency range, a single corresponding ADC samples the signal which is down coverted and equalized to generate a direct output to expand the instantaneous bandwidth of the receiver.
