Device and method for receiving downlink signal in wireless communication system

摘要

A device and method is provided for iterative inter-cell interference cancellation and channel equalization in the mobile communication system. A downlink receiver of a mobile communication system according to the present invention includes a channel estimator for estimating channel impulse response of a selected cell from channel signals of respective cells; an equalizer for equalizing the channel impulse response output by the channel estimator using an equalization coefficient; a despreader for generating a symbol observation value per code channel by despreading the output of the equalizer with a code of the selected cell; and a cell interference estimator for estimating a symbol signal power and noise power of a data code channel from the symbol observation value and generates the estimated MMSE as a chip level regeneration sample.

主权项

1. A downlink receiver in a mobile communication system, comprising:
a channel estimator for estimating channel impulse response of a selected cell from channel signals of respective cells; an equalizer for equalizing an output of the channel impulse response by the channel estimator using an equalization coefficient; a despreader for generating a symbol observation value, per code channel by despreading an output of the equalizer with a code of the selected cell; a cell interference estimator for estimating a symbol signal power and noise power of a data code channel from the symbol observation value and generating an estimated Minimum Mean Square Error (MMSE) as a chip level regeneration sample; and an interference canceler connected between an input node of the downlink receiver and the equalizer, for buffering the output of the cell interference estimator to a regeneration sample buffer of the selected cell, subtracting a sum of regeneration samples of interfering cells from an input sample signal to remove interference, and inputting a result of the subtraction to the equalizer.