FDM-CDMA TRANSMITTING METHOD, FDM-CDMA RECEIVING METHOD AND DEVICE FOR THESE

摘要

PROBLEM TO BE SOLVED: To integrate broadcasting of an FDM method and the communication of a CDMA method. SOLUTION: A diffusion code setting circuit 3 generates N pieces of vectors, whose polarities are each +1 or -1 which are specific to a communication user. A multiplier 4-n multiplies the N-th data by the N-th diffusion code corresponding to the data to perform diffusion modulation. An FDM synthesis circuit 5 modulates N pieces of data in the FDM method. An FDM separation circuit 8 demodulates a received signal in the FDM method. An inverse diffusion code setting circuit 9 generates N pieces of vectors, whose polarities are each +1 or -1 and which are proper to the user of a transmitting side. A multiplier 10-N multiplies the n-th data by the N-th inverse diffusion code corresponding to the data to perform inverse diffusion modulation.