RECEIVER DEVICE, TRANSMIT/RECEIVE TERMINAL, PROPAGATION DELAY TIME MEASUREMENT METHOD AND COMPUTER PROGRAM

摘要

A receiver device is provided with: channel estimation unit which obtains channel estimation values for a frequency domain on the basis of pilot symbols disposed in an OFDM subcarrier; interpolation unit which performs interpolation so that the number of samples of channel estimation values obtained by the channel estimation unit is a power of 2; transformation unit which transforms the channel estimation values interpolated by the interpolation unit into a time domain to obtain a delay profile; and power peak position detection unit which detects a power peak position of the delay profile so as to obtain a propagation delay time. The power peak position detection unit references the signal power of the portion interpolated by the interpolation unit in order to detect a suitable power peak position in the delay profile.

主权项

1. A receiver device receiving a signal transmitted by means of an orthogonal frequency division multiplexing system, comprising:
a channel estimation means which calculates channel estimation values in a frequency domain based on pilot symbols arranged in orthogonal frequency division multiplexing subcarriers; an interpolation means which carries out an interpolation on the channel estimation values calculated by way of the channel estimation means to make the number of samples become a power of 2; a transforming means which transforms the channel estimation values, interpolated by the interpolation means, into a time domain to obtain a delay profile; and a power peak position detecting means which detects a power peak position in the delay profile to calculate a propagation delay time of the signal transmitted; wherein the power peak position detecting means refers to a signal power of a part interpolated by the interpolation means to detect an appropriate power peak position in the delay profile.