FIELD: communication devices.
SUBSTANCE: invention relates to a communication system which uses multi-accessing. Provided is a method and device for transmitting/receiving in a wireless communication system based on orthogonal frequency-division multiplexing (OFDM), in which the data transmitting device adaptively selects a multiplexing scheme in accordance with code rate of the transmission packet or actual signal-to-noise ratio (SNR) of the wireless channel for the corresponding terminal during transmission of the data packet channel. The adaptive multiplexing scheme has the same concept as the scheme for adaptive unitary precoding. Multiplexing with unitary precoding involves orthogonal frequency and code division multiplexing (OFCDM), fast Fourier transformation with spectrum broadening OFDM (FFT-S-OFDM), fast frequency hopping OFDM (FFH-OFDM) etc. The method and device adaptively select the multiplexing scheme and transmit/receive data using the selected multiplexing scheme, thereby increasing efficiency of receiving data packets.
EFFECT: increased efficiency of receiving data packets at high code rate.
14 cl, 14 dwg
