上行MC-CDMA／TDD系统中的新型预补偿技术
A Novel Pre-compensation Scheme in Uplink MC-CDMA/TDD Systems
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摘要: 该文提出了MC-CDMA／TDD系统中的一种新型限制功率的预补偿技术，避免了在上行链路中插入导频，从而提高了频率／功率利用率。在上行链路中，为了保持发射功率不变，移动台发射机只对发射信号的相位进行预处理，而对接收信号幅度的估计和补偿都由基站接收机来完成。文中的分析包括由于信道时变引起的性能损失。仿真结果表明所提出的预补偿系统具有良好的性能。Abstract: This 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 signal is predistorted before transmission at the mobile stations transmitter while the amplitude estimation and compensation of received signal are performed at the base stations receiver on the uplink. The performance degradation due to the time varying channel is also included in the analysis. Simulation results show the good performance of the proposed pre-compensation method.
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