Patent ID: 7221716

Claim:
A signal receiving apparatus adapted for use with a time-variant channel, the signal receiving apparatus which receives, as a received signal, a signal transmitted through the channel with a time-varying characteristic and which restores original user information from the received signal, comprising: a first channel characteristic estimator to estimate a first delay characteristic signal representing a delay characteristic of the channel from a restored transmitted signal and the received signal, and output the estimated first delay characteristic signal; a first channel characteristic predictor to decimate the estimated first delay characteristic signal input from the first channel characteristic estimator, predict the characteristic values of the channel from the decimated result of the first delay characteristic signal, interpolate the predicted channel characteristic values, and output the interpolated result of the channel characteristic values as a first predictive characteristic signal representing the predicted characteristic of the channel; and a first receiver adapted to estimate a decision value from the first predictive characteristic signal and the received signal, restore the transmitted signal from the estimated decision value, and output the restored transmitted signal to the first channel characteristic estimator, whereby the original user information is restored from the decision value.