ABSTRACT
For possessing outstanding performance, spread spectrum communication has been widely used in secret communication and commercial communication for decades. And correspondingly, the detection of spread spectrum communication has become an important research content for communication monitoring and electronic warfare. C. Bouder et al. (2003) did some intensive research on the non-cooperative baseband detection of BPSK-DS communication, and proposed a detection method which is based on the analysis of the second-order moment of the autocorrelation of the received signal; J.D. Vlok et al. (2012) did some research on the detection of direct sequence spread spectrum (DSSS) communication, and a semi-blind approach was proposed; Sha Z.C. et al. (2013) discussed the baseband detection of the multi-rate DSSS communication according to the principle of the second-order moment of autocorrelation; The paper, which takes the blind detection of QPSK-DS communication as the research topic, proposes a simple algorithm for QPSK-DS communication detection.
