A study on coded parallel combinatorial spread spectrum systems using multiphase modulation

摘要

This paper investigates a Reed Solomon (RS) coding scheme for multiphase parallel combinatorial spread spectrum (PC/SS) systems. In the PC/SS systems, multiple pseudo-noise (PN) sequences are simultaneously transmitted out of a pre-assigned spreading sequences set through mapping data onto a specific combination of PN sequences. Using M-ary P5K modulation enables increasing data rate in the PC/SS system. In this paper, the bit error performance is evaluated in RS coded multiphase PC/SS systems with errors-only decoding and error-and-erasure decoding. We also discussed the relations between the error rate performance and the total information bit rate. It is found that the PC/SS system with QPSK yields a superior performance both for error performance and data rate.