上行MC-CDMA／TDD系統(tǒng)中的新型預補償技術
A Novel Pre-compensation Scheme in Uplink MC-CDMA/TDD Systems
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摘要: 該文提出了MC-CDMA／TDD系統(tǒng)中的一種新型限制功率的預補償技術，避免了在上行鏈路中插入導頻，從而提高了頻率／功率利用率。在上行鏈路中，為了保持發(fā)射功率不變，移動臺發(fā)射機只對發(fā)射信號的相位進行預處理，而對接收信號幅度的估計和補償都由基站接收機來完成。文中的分析包括由于信道時變引起的性能損失。仿真結果表明所提出的預補償系統(tǒng)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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