Uplink performance of MC-CDMA/TDD systems with pre-compensation

The paper presents a novel power-limited pre-compensation method in MC-CDMA/TDD systems, which can avoid pilot insertion on the uplink and increase the spectral/power efficiency. To keep the transmission power constant, only the phase of the signal is predistorted before transmission at the mobile station's transmitter while the amplitude estimation and compensation of the received signal are performed at the base station's receiver on the uplink. The performance degradation due to the time varying channel is also included in our analysis. Simulation results show good performance with the proposed pre-compensation method and our conclusion is given finally.