PARAFAC Receiver for Two-dimensional Spread Spectrum Systems
Dazhuan Xu · Journal of Nanjing University of Posts and Telecommunications · 2007
An analysis of the DFT received signal of two-dimensional spread spectrum system shows that the received signal has trilinear model characteristics.Hence PARAFAC(PARArallel FACtor) receiver algorithm for two-dimension spread spectrum system is proposed in this paper.The algorithm uses trilinear alternating least square algorithm to attain the source matrix and then makes decision for the matrix.The simulation results reveal that,in comparison to non-blind correlator receiver,the performance of PARAFAC receiver algorithm is approaching to the former with SNR increasing and is similar to the former under the condition of lower SNR.It is a true blind detection algorithm in that it needs no knowledge of channel fading information as well as time domain and frequency domain spread spectrum codes.