Spread spectrum communication system performance analysis based on the complete complementary sequence

The bit error rate (BER) performance of CDMA system will rapidly deteriorate under the co-channel interferences. To solve the problem, we give a polyphase complete complementary sequence-based direct-sequence code-division multiple access (CC-DS-CDMA) for additive white Gaussian noise (AWGN) channel in this paper. Sets of sequences with complete complementary principle are known because of their ability to achieve excellent correlation properties. Different from the classical CDMA systems, we take the quadri-phase complete complementary sequences (CC-S) for example to do the performance simulation owing to polyphase CC-S are superior to a single sequence in properties. We draw a conclusion that using CC-S as spread spectrum code can suppress noise interference more effectively and greatly reduce the interference among different users in comparison to those conventional pseudo-random(PN) sequence (such as m-sequence, gold-sequence) within lots of simulation.