DIRECT SPREAD SPECTRUM COMMUNICATION SYSTEM HAVING PROVISION FOR DELAYED MULTIPLEX SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a direct spread spectrum communication system having a simplex part and a multiplex part adopting a data format for optimum transmission while keeping compatibility with the format RCR-STD 33A. SOLUTION: In this direct spread spectrum communication system applicable to a delayed multiplex method having a simplex part and a multiplex part, data with a format in compliance with the Japanese standard RCR-STD 33A for spread spectrum communication are incorporated in the simplex part. In this system consisting of the simplex part and the multiplex part, wherein the simplex part provides an excellent error rate with respect the same C/N, format data in compliance with the RCR standard, that is, a SYNC/a synchronizing bit/a call signal/an ID that are important information for connection are imbeded only in the simplex part providing a smaller error rate than that of the multiplex part and not incorporated in the multiplex part. Also adapted data in compliance with the standards IEEE 802.11, data denoting the multiplex part (length, number of multiplex and modulation system), basic information and application information may be imbeded as a format in the simplex part.