Patent ID: 6512738
Filing Date: 2003-01-28
Classification: H04B,H04L

Abstract:
A method of receiving diversity comprising:a receiving step for receiving orthogonal frequency division multiplexing signals; a frequency transforming step for obtaining a plurality of frequency spectrum signals through frequency transforming of said orthogonal frequency division multiplexing signals; a weighting step for carrying out weighting on frequency spectrum signals obtained from said frequency transforming step based on transmission channel frequency responses obtained from said frequency spectrum signals; a combining step for obtaining combined frequency spectrum signals by combining a plurality of said frequency spectrum signals; a demodulating step for demodulating digital signal sequence from said combined frequency spectrum signals; a step for generating reference frequency spectrum signals for reference, wherein said transmission channel frequency responses are calculated on the basis of said frequency spectrum signals and said reference frequency spectrum signals; and a filtering step for removing noise component contained in said transmission channel frequency responses, wherein said weighting step carries out weighting on each of said frequency spectrum signals or said combined frequency spectrum signals on the basis of transmission channel frequency responses from which noise component has been removed by said filtering step, and wherein said filtering step comprises: a step for transforming said transmission channel frequency responses into transmission channel time responses, a step for measuring propagation time delay in the environment of multipath reflection of wave propagation, using said transmission channel time responses, and a step, in which a band width has been set up so as to remove noises on the basis of said propagation delay time, for carrying out filtering on said transmission channel frequency responses.