上行MC-CDMA／TDD系統(tǒng)中的新型預(yù)補(bǔ)償技術(shù)
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(yù)補(bǔ)償技術(shù)，避免了在上行鏈路中插入導(dǎo)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(dòng)臺(tái)發(fā)射機(jī)只對發(fā)射信號(hào)的相位進(jìn)行預(yù)處理，而對接收信號(hào)幅度的估計(jì)和補(bǔ)償都由基站接收機(jī)來完成。文中的分析包括由于信道時(shí)變引起的性能損失。仿真結(jié)果表明所提出的預(yù)補(bǔ)償系統(tǒng)具有良好的性能。
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關(guān)鍵詞:
- MC-CDMA; 上行; 預(yù)補(bǔ)償; TDD
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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