Receiver and reception method for estimating channel in an orthogonal frequency division multiple access system

摘要

A receiver and reception method for estimating a channel in an Orthogonal Frequency Division Multiple Access (OFDMA) system is provided. The receiver includes a delay estimator for estimating, from a signal received from a transmitter through multipaths, at least one of an average time delay of the multipaths and a time delay of one of the multipaths having a maximum power among the multipaths, a rotator for circular-rotating the received signal using the estimated delay, and a channel estimator for estimating a channel impulse response of the circular-rotated signal.

主权项

1. A receiver for estimating a channel in an orthogonal frequency division multiple access (OFDMA) system, the receiver comprising:
a maximum estimator configured to estimate, from a reference signal received from a transmitter through multipaths, a delay value of a multipath having a maximum power among the multipaths; a rotator configured to circular-rotate a signal using the estimated delay value before the signal is input to a fast Fourier transform (FFT) unit; and a channel estimator configured to estimate a channel impulse response of the circular-rotated signal.