Blind Demodulation for DS-CDMA transmission over frequency selective channels

In this paper, we focus our attention on blind demodulation for DS-CDMA transmission in the context of radio surveillance and military applications. We present a blind demodulation technique for DS-CDMA transmission over frequency selective channels. The technique exploits the autocorrelation properties of the transmitted signal to estimate the parameters (symbol duration, timing offset, phase offset, spreading sequences) and to demodulate the transmitted symbols without requiring any additional pilots. Simulation results are performed on various channel models with timing offsets.