Method of transmitting or receiving uplink signals and equipment therefor

摘要

A method of transmitting or receiving uplink signals in a wireless communication system and an apparatus therefor are provided. In one aspect of the method of transmitting the uplink signals, a base station determines whether each of user equipments uses an orthogonal frequency division multiple access (OFDMA) scheme or a single carrier-frequency division multiple access (SC-FDMA) scheme in uplink transmission. Further, the base station transmits scheduling information containing information regarding the determined multiple access scheme to the user equipments, and thus reports a multiplexing scheme to be used by each user equipment. In addition, each user equipment transmits the uplink data to the base station by multiplexing the uplink data by using the OFDMA scheme or the SC-FDMA scheme according to the scheduling information.

主权项

1. A base station in a wireless communication system, comprising:
a scheduler configured to assign uplink transmission scheme to a user equipment (UE) based on channel state of the UE, a distance between the UE and the base station, and the number of UEs assigned the uplink transmission scheme in a cell, the uplink transmission scheme for the UE being one of: an orthogonal frequency division multiple access (OFDMA) scheme and a single carrier-frequency division multiple access (SC-FDMA) scheme; a receiver configured to process a signal received from the user equipment; a fast Fourier transform (FFT) processor configured to perform an FFT operation on the received signal to convert the signal into a frequency region signal; a demultiplexer (DEMUX) configured to separate an orthogonal frequency division multiple access (OFDMA) signal and a single carrier-frequency division multiple access (SC-FDMA) signal from a signal output from the FFT processor; a channel/interference estimator configured to perform a channel/interference estimation operation on the OFDMA signal and the SC-FDMA signal output from the DEMUX; an OFDMA signal processing unit configured to restore first data by processing the OFDMA signal output from the channel/interference estimator; and an SC-FDMA signal processing unit configured to restore second data by processing the SC-FDMA signal output from the channel/interference estimator, wherein the SC-FDMA signal processing unit comprises a first interference canceller configured to cancel interference of the SC-FDMA signal output from the channel/interference estimator by using the first data output from the OFDMA signal processing unit, and wherein the OFDMA signal processing unit comprises a second interference canceller configured to cancel interference of the OFDMA signal output from the channel/interference estimator by using the second data output from the SC-FDMA signal processing unit.