本文選題：多輸入多輸出　切入點(diǎn)：空間調(diào)制　出處：《西南交通大學(xué)》2016年博士論文

【摘要】：空間調(diào)制(spatial modulation, SM)和空移鍵控(space shift keying, SSK)是一類新型的多輸入多輸出(Multiple-Input Multiple-Output, MIMO)傳輸技術(shù)。與傳統(tǒng)MIMO傳輸技術(shù)相比,空間調(diào)制和空移鍵控具有復(fù)雜度低、需要更少射頻(radio frequency, RF)鏈路等優(yōu)點(diǎn)。大規(guī)模MIMO (Massive MIMO)傳輸技術(shù)在基站端配置大量天線,利用各用戶信道間的漸近正交性,可通過簡(jiǎn)單的線性信號(hào)處理實(shí)現(xiàn)多用戶接入,同時(shí)避免用戶間的干擾。本論文主要工作為對(duì)空間調(diào)制、空移鍵控和大規(guī)模MIMO傳輸技術(shù)的改進(jìn)和應(yīng)用。本文首先研究了空移鍵控傳輸中的發(fā)射和接收天線選擇,提出了一種降低反饋量的發(fā)射天線選擇方案(Fix-1)以及低計(jì)算復(fù)雜度的發(fā)射和接收天線選擇算法,推導(dǎo)出了所提算法的精確誤碼率(bit error rate, BER)表達(dá)式以及誤碼率上界的閉合表達(dá)式。接著,本文提出一種發(fā)射天線受限的分布式廣義空移鍵控傳輸系統(tǒng)(generalized SSK,GSSK),其中多個(gè)分布式的基站聯(lián)合構(gòu)成一個(gè)GSSK傳輸系統(tǒng)。在該系統(tǒng)中,每個(gè)基站只配置一套射頻鏈路,所以同一時(shí)刻每個(gè)基站只能有一根發(fā)射天線被激活。由于各基站地理位置不同,其發(fā)射的信號(hào)將經(jīng)歷不同的大尺度衰落,該特點(diǎn)可用于改善系統(tǒng)性能。本文首先推導(dǎo)出了該分布式GSSK的誤符號(hào)率(symbol error rate, SER)表達(dá)式,在此基礎(chǔ)上基于凸優(yōu)化方法提出了一種最小化誤符號(hào)率的功率分配算法。然后,本文將空移鍵控應(yīng)用于高速鐵路(high speed railway, HSR)無線通信中,將該環(huán)境下的無線信道建模為對(duì)數(shù)正態(tài)—萊斯(Lognormal-Rician)混合信道。本文完成了空移鍵控傳輸在該信道下的誤符號(hào)率分析,并結(jié)合高鐵無線通信的信道特點(diǎn),比較了不同天線放置方式對(duì)系統(tǒng)錯(cuò)誤性能的影響。根據(jù)分析結(jié)果,提出一種結(jié)合多點(diǎn)協(xié)作(coordinated multiple point, CoMP)傳輸?shù)目找奇I控傳輸方案,該方案可利用陰影衰落的低相關(guān)性來降低系統(tǒng)誤符號(hào)率,同時(shí)避免了分布式天線結(jié)構(gòu)帶來的發(fā)射端功率損耗。接下來,本文針對(duì)空間調(diào)制多用戶接入系統(tǒng),提出一種基于子空間投影的多用戶檢測(cè)算法,在此基礎(chǔ)上結(jié)合改進(jìn)的廣義可變空間期望最大化(space-alternating generalized expectation-maximization, SAGE)算法,提出了一種SAGE輔助的投影檢測(cè)算法。該檢測(cè)方法的性能可以接近性能最優(yōu)的最大似然檢測(cè)(maximum-likelihood detection, MLD)和球型譯碼(sphere decoding, SD)檢測(cè),同時(shí)在系統(tǒng)規(guī)模較大時(shí)能有效地降低計(jì)算復(fù)雜度。最后,本文提出一種基于時(shí)分雙工(time division duplex, TDD)、正交頻分復(fù)用(orthogonal frequency division multiplexing, OFDM)和大規(guī)模MIMO傳輸技術(shù)的下行多用戶傳輸結(jié)構(gòu)。在該傳輸結(jié)構(gòu)中每個(gè)用戶均使用整個(gè)帶寬,可以節(jié)省用戶調(diào)度的信令開銷。本文推導(dǎo)出采用最大似然估計(jì)(maximum likelihood estimation, MLE)和最小均方誤差(minimum mean square error estimation, MMSE)準(zhǔn)則進(jìn)行信道估計(jì)時(shí)系統(tǒng)的容量表達(dá)式。基于該結(jié)果,得到了大信噪比下最優(yōu)的用戶數(shù)量和導(dǎo)頻序列長(zhǎng)度,并分析了衰落信道的時(shí)間和頻率選擇性對(duì)系統(tǒng)容量的影響,最后提出一種基于用戶信道多徑時(shí)延差異的功率分配方法以提高系統(tǒng)容量。
[Abstract]:Spatial modulation (spatial modulation, SM) and space shift keying (space shift, keying, SSK) is a new type of multi input multi output (Multiple-Input Multiple-Output MIMO) transmission technology. Compared with the traditional MIMO transmission technology, spatial modulation and space shift keying with low complexity and requires less RF (radio frequency. RF link) and other advantages. Large scale MIMO (Massive MIMO) transmission technology in base station configuration of a large number of antennas, the asymptotic orthogonality between each user's channel, can be realized by multi user access linear simple signal processing, to avoid interference between users at the same time. The main work of this thesis is on the improvement and application of empty space modulation. Shift keying and large-scale MIMO transmission technology. This paper studies the space shift keying transmission in transmitting and receiving antenna selection, this paper put forward a selection scheme to reduce the amount of feedback of the transmitting antenna (Fix-1) and low The computational complexity of transmitting and receiving antenna selection algorithms and derive the exact bit error rate of the proposed algorithm (bit error rate, BER) expression and the upper bound of BER closed expressions. Then, this paper presents a generalized distributed antenna with limited space shift keying transmission system (generalized SSK GSSK), which joint base station multiple distributed constitute a GSSK transmission system. In this system, each base station is configured with only a set of radio links, so the same time each base station only one transmitting antenna is activated. Due to the different geographical location of each base station, the transmitted signal will experience different large scale fading, this feature can be to improve the performance of the system. This paper firstly deduced the symbol error rate of GSSK (symbol distributed error rate, SER) expression, convex optimization method has a minimum symbol error rate based on power The rate allocation algorithm. Then, the null shift keying is applied in high-speed railway (high speed, railway, HSR) in wireless communication, wireless channel modeling of the environment for the lognormal - Les (Lognormal-Rician) hybrid channel. The space shift keying rate of transmission in the channel error the symbol, and combine the channel characteristics of the high-speed railway wireless communication, compares the different effects of antenna placement methods on system error performance. According to the results of the analysis, put forward a combination of Coordinated Multi point (coordinated multiple point, CoMP) transmission space shift keying transmission scheme, the scheme can use low correlation to reduce the shadow fading system symbol error rate, while avoiding the transmitter power loss distributed antenna structure. Then, according to the spatial modulation multiple access system, proposes a multi-user detection algorithm based on subspace projection, in The improvement of this generalized variable space based on the combination of expectation maximization (space-alternating generalized expectation-maximization SAGE) algorithm, presents a projection SAGE aided detection algorithm. The maximum likelihood detection performance of the detection method can approach the optimal performance of the (maximum-likelihood, detection, MLD) and sphere decoding (sphere decoding, SD) detection, at the same time in the large scale system can effectively reduce the computational complexity. Finally, this paper puts forward a kind of based on time division duplex (time division, duplex, TDD), orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) downlink MIMO transmission technology and large-scale multi-user transmission structure. In the transmission structure of each user are used throughout the user can save bandwidth, signaling overhead scheduling. This paper deduces the use of maximum likelihood estimation (maximum likelihood estimation , MLE) and minimum mean square error (minimum mean square error estimation, MMSE) criterion to estimate the channel capacity expression system. Based on the results obtained under high SNR optimal pilot sequence length and the number of users, and analyzes the effect of time and frequency selective fading channels on the system capacity, finally proposed to improve the system capacity based on user power allocation method for multipath time delay difference.

【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類號(hào)】：TN919.3

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 龔麗莎;尹露;龔賽丹;李磊;何旭;肖悅;;基于空間調(diào)制的天線選擇和能效優(yōu)化算法[J];電子科技大學(xué)學(xué)報(bào);2014年04期

2 劉飛;易林;;非線性空間調(diào)制對(duì)兩分量玻色-愛因斯坦凝聚孤子演化的影響[J];光電子.激光;2011年12期

3 劉文龍;王楠;金明錄;;廣義空間調(diào)制系統(tǒng)的稀疏檢測(cè)算法[J];信號(hào)處理;2013年09期

4 宋茂忠;許宗澤;劉渝;;一種基于二維微波空間調(diào)制的通信跟蹤系統(tǒng)[J];宇航學(xué)報(bào);2008年01期

5 沈?yàn)槊?時(shí)善進(jìn);緊湊型空間調(diào)制傅里葉變換光譜儀[J];半導(dǎo)體光電;2001年06期

6 候永宏;王丕超;向維;趙曉明;侯春萍;;空間調(diào)制系統(tǒng)的遍歷容量分析(英文)[J];中國(guó)通信;2013年07期

7 郭明喜;賈沖;沈越泓;魏以民;侯興康;;空間調(diào)制技術(shù)及其性能仿真[J];軍事通信技術(shù);2009年03期

8 呂群波;相里斌;黃e，

本文編號(hào)：1680767