Patent ID: 7310503
Filing Date: 2007-12-18
Classification: H04B,H04L

Abstract:
1. A diversity receiver comprising: a plurality of demodulation paths for demodulating received signals and outputting demodulated signals; a power ratio comparator for calculating a power ratio from a first power corresponding to a first received signal on one of the demodulation paths and a second power corresponding to a second received signal on another one of the demodulation paths, and comparing the power ratio with a predetermined threshold value; a signal selector for selecting one of the demodulated signals output from the plurality of demodulation paths and outputting the selected demodulated signal; an equal-gain signal combiner for combining the demodulated signals output from the plurality of demodulation paths with predetermined gains, and outputting a combined demodulated signal; a demodulated signal output unit for outputting one of the demodulated signals, either the selected demodulated signal or the combined demodulated signal, responsive to a result of the comparison in the power ratio comparator; and an estimated power value calculator that outputs, as said first power, an estimated power value obtained from the result of channel characteristic estimation using a reference signal contained in the first received signal.