Abstract:

Correlation estimator is widely exploited to realize spread spectrum signal detection, because of many advantages, such as less computation cost and making full use of the statistic character of signal and noise. A unified signal model, which is suitable to direct sequence spread spectrum (DS/SS) signal, direct sequence code division multiple access (DS/CDMA) signal, multirate DS/CDMA signal and multicarrier DS/CDMA signal, is established. Then, according to the principle of secondorder moment of autocorrelation, the theoretical value which is contributed to the unified model signal is deduced and the establishment of condition for classic literature is pointed out. Finally, simulation results demonstrate the validity of the algorithm.