本文選題：毫米波 + MIMO　； 參考：《南京郵電大學》2017年碩士論文

【摘要】：在第五代無線通信技術的研究中,毫米波(mmWave)通信憑借著其可利用頻譜寬、抗干擾能力強、易于集成化等優(yōu)勢,得到了廣泛的關注和研究。而將mmWave技術與目前已經(jīng)廣泛使用的大規(guī)模MIMO系統(tǒng)結合,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5G無線通信系統(tǒng)的一個技術方向。但與此同時,mmWave信號比目前大多數(shù)無線應用和所有蜂窩系統(tǒng)中使用的微波信號都要經(jīng)歷更大的路徑損耗。大天線陣列的應用,可以很好的緩解毫米波系統(tǒng)難以避免的路徑損耗問題,使用多個數(shù)據(jù)流的波束成形(即預編碼)可以進一步改善mmWave的頻譜效率。在傳統(tǒng)的多天線系統(tǒng)中,預編碼都是在數(shù)字域完成的。然而,mmWave系統(tǒng)中混合信號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上,提出使用一種子天線陣列的結構來替代全天線陣列結構,并同時在數(shù)字域和模擬域上來完成整個系統(tǒng)的預編碼。進而提出了一種基于正交匹配追蹤的改進型的混合預編碼算法,通過將復雜的信道容量求解問題分解為若干獨立的子問題,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,以求得整個系統(tǒng)的最大信道容量問題。仿真結果表明提出的混合預編碼算法在性能上十分接近最佳無約束預編碼算法,且復雜度大大降低。
[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.
【學位授予單位】：南京郵電大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN919.3

【參考文獻】

相關期刊論文 前1條

1 趙國鋒;陳婧;韓遠兵;徐川;;5G移動通信網(wǎng)絡關鍵技術綜述[J];重慶郵電大學學報(自然科學版);2015年04期

相關碩士學位論文 前1條

1 朱晨;毫米波通信中波束賦形性能仿真平臺的設計與實現(xiàn)[D];北京郵電大學;2015年

，

本文編號：2072072