SPREAD CODE ALLOCATING METHOD, SIGNAL TRANSMITTING METHOD, SIGNAL RECEIVING METHOD, TRANSMITTING DEVICE, RECEIVING DEVICE, AND RECORDING MEDIUM OF MOBILE COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To efficiently use a spread code for a downlink of a mobile communication system using a multi-carrier CDMA system. SOLUTION: An information symbol is multiplied by a short code and further multiplied by a long code. An information symbol series is copied as many times as symbols equal to the series length of the short code by information symbols and arranged on a frequency axis. Then the arranged information symbol series on the frequency axis is multiplied by the short code. Further, the information symbol series on the frequency axis multiplied by the series length N is multiplied by the long code.