LOW COMPLEXITY DATA DETECTION USING FAST FOURIER TRANSFORM OF CHANNEL CORRELATION MATRIX

摘要

PROBLEM TO BE SOLVED: To simplify a receiving apparatus of multiplex communication by common frequency spectrum such as TDD/CDMA communication system.;SOLUTION: A combined signal is received via common frequency spectrum of a time division duplex (TDD) communication system using code division multiple access(CDMA). Each data signal experiences a similar channel response. The similar channel response is estimated. A matrix representing a channel of the data signals based on in part the estimated channel response is constructed. A spread data vector is determined based on in part a fast fourier transform (FFT) of a circulant version of the channel matrix. The spread data vector is despread to recover data from the received combined signal.;COPYRIGHT: (C)2007,JPO&INPIT