Transmitters and receiver of spectrum spread communication system, and modulation and demodulation methods thereof

摘要

Data hopping means is provided with a hopping generation unit 21 and a data selection unit 23, the hopping pattern generation unit 21 generating a predetermined hopping pattern, and the data selection unit 23 outputting a plurality of subcarrier transmission signals corresponding to respective subcarriers, by receiving transmission data and outputting only the data carried in the subcarrier designated by the hopping pattern as the subcarrier transmission signal, while maintaining the other subcarrier transmission signals at a zero output level. Inverse Fourier transform means subjects the entirety of subcarrier reception signals output from the data selection unit 23 to inverse Fourier transform and outputs frequency-hopped spread-spectrum transmission signals.