COMMUNICATION SYSTEM, TRANSMITTER APPARATUS AND RECEIVER APPARATUS

摘要

A transmitter apparatus of a communication system comprises: a band spreading unit that divides a transmitted signal into a plurality of subspectrums at a first sampling rate (F1) and further generates, from the subspectrums obtained by the division, one or more low-rate intermediate combined signals; and a multiplexing unit that multiplexes the intermediate combined signals at a second sampling rate (F2) higher than the first sampling rate (F1) (F2 > F1) for spread into a wide band. A receiver apparatus comprises: a demultiplexing unit that extracts, from a received signal, one or more low-rate intermediate combined signals at the second sampling rate (F2); and a band combining unit that combines the intermediate combined signals at the first sampling rate (F1), thereby extracting the subspectrums to reconstruct the transmitted signal.