TRANSMITTER AND RECEIVER FOR SPREAD SPECTRUM RADIO COMMUNICATION SYSTEM, AND MODULATING-DEMODULATING METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a spread spectrum radio communication system of a frequency hopping type, which raises the data transfer efficiency and improves the communication quality. SOLUTION: The system comprises a hopping pattern generator for generating a prescribed hopping pattern, a data hopping means having a data selector which outputs inputted transmission data about sub-carriers designated by the hopping pattern as sub-carrier transmission signals, as they are, and outputs a plurality of sub-carrier transmission signals, corresponding to other sub-carriers about which sub-carrier transmission signals are fixed to zero-output, and an inverse Fourier transforming means for inverse-Fourier transforming all the sub-carrier transmission signals outputted from the data selector, thereby outputting spread spectrum transmission signals in a frequency-hopping system.