Receiver apparatus, reception method, communication system, and communication method

Abstract

A receiver apparatus includes a channel estimator (b106) to perform channel estimation. The channel estimator includes an interim channel impulse estimating unit (b106-1) that calculates an interim channel impulse response estimation value, a path extracting unit (b106-3) that extracts a path for use in calculation of a channel impulse response estimation value from among paths forming the interim channel impulse response estimation values, a channel impulse response estimating unit (b106-4) that calculates the channel impulse response estimation value using the path extracted by the path extracting unit, and a frequency response estimating unit (b106-5) that converts the channel impulse response estimation value into a frequency response estimation value by time-frequency transforming the channel impulse response estimation value. In this way, a receiver apparatus capable of performing accurate channel estimation results.

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