本文選題：多輸入多輸出 + 閉環(huán)與開環(huán)　； 參考：《南京理工大學(xué)》2014年碩士論文

【摘要】：近些年,無線通信技術(shù)進(jìn)入了一個高速發(fā)展的階段,無線通信的終端數(shù)正與日俱增,這就對當(dāng)今的無線數(shù)據(jù)傳輸速率以及通信質(zhì)量提出了更高的要求與挑戰(zhàn)。多輸入多輸出(MIMO)技術(shù)就是在這樣的背景下發(fā)展起來的,并迅速成為了無線通信的熱門研究領(lǐng)域。MIMO技術(shù)不僅可以提高鏈路的傳輸速率,也提高了系統(tǒng)的可靠性,具有很大的實用價值。MIMO技術(shù)可以分為開環(huán)與閉環(huán)MIMO技術(shù)。在開環(huán)MIMO系統(tǒng)中,發(fā)送端無法獲得信道信息,但發(fā)送端能夠利用開環(huán)MIMO技術(shù)來增強(qiáng)接收端接收到信號強(qiáng)度或者獲得空間復(fù)用增益。在閉環(huán)MIMO系統(tǒng)中,發(fā)送端利用接收端反饋回來的信道信息進(jìn)行信號預(yù)處理,從而獲得增益。 本文圍繞LTE系統(tǒng)中的預(yù)編碼技術(shù),對以下幾個方面進(jìn)行了研究：開環(huán)MIMO預(yù)編碼技術(shù)的實現(xiàn)方案以及適用場景；閉環(huán)MIMO預(yù)編碼技術(shù)的具體實施以及應(yīng)用場景；基于閉環(huán)交替差分碼本預(yù)編碼技術(shù)的實現(xiàn)方案以及性能分析。通過仿真,分析了各種預(yù)編碼技術(shù)的優(yōu)點與缺點。
[Abstract]:In recent years, wireless communication technology has entered a stage of rapid development, and the number of wireless communication terminals is increasing, which puts forward higher requirements and challenges to the wireless data transmission rate and communication quality. Multi-input multiple-output (MIMO) technology is developed under this background, and has rapidly become a hot research area of wireless communication. MIMO technology can not only improve the transmission rate of links, but also improve the reliability of the system. It has great practical value. MIMO technology can be divided into open loop and closed loop MIMO technology. In an open-loop MIMO system, the sender can not obtain channel information, but the sender can use open-loop MIMO technology to enhance the received signal strength or gain spatial multiplexing gain. In the closed-loop MIMO system, the transmitter uses the channel information feedback from the receiver to preprocess the signal and obtain the gain. This paper focuses on the precoding technology in LTE system and studies the following aspects: the implementation scheme and applicable scenario of open-loop MIMO precoding technology, the concrete implementation of closed-loop MIMO precoding technology and the application scenario; The implementation scheme and performance analysis based on closed loop alternating differential codebook precoding technology. Through simulation, the advantages and disadvantages of various precoding techniques are analyzed.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.5

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