FLEXIBLE TIME-FREQUENCY MULTIPLEXING STRUCTURE FOR WIRELESS COMMUNICATION

摘要

PROBLEM TO BE SOLVED: To provide techniques for efficiently sending data in a wireless communication system.SOLUTION: Code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) is selected for each traffic segment. Each traffic segment carries CDM data at a chip rate if CDM is selected or carries OFDM data if OFDM is selected. OFDM symbols are generated at a sample rate being an integer ratio of the chip rate and have a duration determined based on the traffic segment duration. An output waveform carries CDM data and/or OFDM data on at least one carrier in spectral allocation and further carries OFDM data on remaining usable subcarriers in the spectral allocation.