TANG You-xi, PAN Wen-sheng, SHAO Shi-hai, et al. A De-spread Spectrum Method of DS-CDMA Based on Time-Frequency Two Dimension Spread Spectrum[J]. Acta Electronica Sinica, 2006, 34(1): 1-4.
TANG You-xi, PAN Wen-sheng, SHAO Shi-hai, et al. A De-spread Spectrum Method of DS-CDMA Based on Time-Frequency Two Dimension Spread Spectrum[J]. Acta Electronica Sinica, 2006, 34(1): 1-4.DOI：
Considering the methods of detecting DS-CDMA signal in multipath fading channels
a new method based on time-frequency two dimensional spread-spectrum is proposed in this paper.The received signals in the symbol duration are transformed into the frequency domain by
N
f
-point DFT where
N
f
is less than the processing gain
N
then the signals are combined both in the frequency and time domain.The complexities of the RAKE receiver
the method proposed in the paper and the receiver with channel sounding with path selection are compared.Finally computer simulation results show that the performance of the proposed receiver is the best among the three methods in the channels which have small root mean square (r.m.s.)
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