The Detection Methods Based on the Fourth-order Moment Slices and the Accumulation for DSSS/QPSK Signal

This paper applies the higher order statistical theory to the detection of the DSSS signal, and proposes time domain and frequency domain detection methods based on the fourth-order moment different slices. Simulation results show that the detection performance of frequency domain method is better than that of the time domain method, its detection probability is above 50% at SNR -20 dB. Using the accumulation technology, the detection performance improves 5 dB. The proposed methods don´t involve extensive matrix operations, so they are easy to implement and their computation complexities are low