ON THE M-ARY DS/SS COMMUNICATION SYSTEMS

摘要

This paper focuses on the performances of data throughput and error rate of Mary DS/SS communication systems.The extending constant weight code(ECWC)is defined and some issues on code selection are considered.The concept of optimal mapping from data symbol space to ECWC(or PN sequence combina tion)is proposed.The simulation results show that the performances can be improved very much by chosing a proper ECWC and employing a good mapping.In addition,we find that the ECWCs with code weight one and correlation zero are very powerful.