本文選題：毫米波 + MIMO�。� 參考：《南京郵電大學(xué)》2017年碩士論文

【摘要】：在第五代無(wú)線通信技術(shù)的研究中,毫米波(mmWave)通信憑借著其可利用頻譜寬、抗干擾能力強(qiáng)、易于集成化等優(yōu)勢(shì),得到了廣泛的關(guān)注和研究。而將mmWave技術(shù)與目前已經(jīng)廣泛使用的大規(guī)模MIMO系統(tǒng)結(jié)合,可以在可用帶寬和頻譜效率上得到大幅度的提升,這是未來(lái)5G無(wú)線通信系統(tǒng)的一個(gè)技術(shù)方向。但與此同時(shí),mmWave信號(hào)比目前大多數(shù)無(wú)線應(yīng)用和所有蜂窩系統(tǒng)中使用的微波信號(hào)都要經(jīng)歷更大的路徑損耗。大天線陣列的應(yīng)用,可以很好的緩解毫米波系統(tǒng)難以避免的路徑損耗問(wèn)題,使用多個(gè)數(shù)據(jù)流的波束成形(即預(yù)編碼)可以進(jìn)一步改善mmWave的頻譜效率。在傳統(tǒng)的多天線系統(tǒng)中,預(yù)編碼都是在數(shù)字域完成的。然而,mmWave系統(tǒng)中混合信號(hào)硬件的高成本和高功耗,迫使mmWave更加依賴于模擬處理。本文在全天線陣列的基礎(chǔ)上,提出使用一種子天線陣列的結(jié)構(gòu)來(lái)替代全天線陣列結(jié)構(gòu),并同時(shí)在數(shù)字域和模擬域上來(lái)完成整個(gè)系統(tǒng)的預(yù)編碼。進(jìn)而提出了一種基于正交匹配追蹤的改進(jìn)型的混合預(yù)編碼算法,通過(guò)將復(fù)雜的信道容量求解問(wèn)題分解為若干獨(dú)立的子問(wèn)題,并利用連續(xù)干擾消除的思想解決子天線陣列之間的干擾,以求得整個(gè)系統(tǒng)的最大信道容量問(wèn)題。仿真結(jié)果表明提出的混合預(yù)編碼算法在性能上十分接近最佳無(wú)約束預(yù)編碼算法,且復(fù)雜度大大降低。
[Abstract]:In the research of the fifth generation wireless communication technology, millimeter wave (mmWave) communication has been widely studied because of its advantages of wide spectrum, strong anti-interference and easy integration. Combining mmWave technology with large scale MIMO systems, which has been widely used at present, can greatly improve the available bandwidth and spectral efficiency, which is a technical direction of 5G wireless communication systems in the future. At the same time, however, the current microwave signal in most wireless applications and in all cellular systems has a higher path loss. The application of large antenna array can alleviate the unavoidable path loss problem of millimeter wave system. The beamforming (i.e. precoding) of multiple data streams can further improve the spectrum efficiency of mmWave. In traditional multi-antenna systems, precoding is done in digital domain. However, the high cost and high power consumption of the mixed signal hardware in the mmWave system make it more dependent on analog processing. Based on the full antenna array, a subantenna array structure is proposed to replace the full antenna array structure, and the precoding of the whole system is completed in both digital and analog domains. Furthermore, an improved hybrid precoding algorithm based on orthogonal matching tracing is proposed, which decomposes the complex channel capacity problem into several independent sub-problems. In order to solve the problem of the maximum channel capacity of the whole system, the interference between the subantenna arrays is solved by using the idea of continuous interference cancellation. Simulation results show that the performance of the proposed hybrid precoding algorithm is very close to the optimal unconstrained precoding algorithm and the complexity is greatly reduced.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN919.3

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本文編號(hào)：2072072