Equalizing signal combiner

摘要

A signal combiner in a digital radio system space diversity receiver measures (19) the power in selected portions of the spectrum of the output signal (18) and varies the circuit parameters (17) in a manner to maintain any preselected relationship among the measured powers. In a specific embodiment, means are provided for varying the relative phase phi of the local oscillator signals coupled to a pair of frequency converters in the signal paths 10, 11 as one means for maintaining a preselected relationship among the measured powers.