【摘要】：隨著移動通信技術的蓬勃發(fā)展,人們越來越需要超高速的傳輸速率,超大的容量、超可靠性、隨時隨地的接入。面對日益增長的需求,通信資源卻十分緊缺,這進一步需要引入新的無線傳輸技術�？臻g調(diào)制(Spatial Modulation,SM)作為多輸入多輸出(Multiple Input Multiple Output,MIMO)傳輸技術中的一個新型傳輸概念,很有可能作為第五代移動通信系統(tǒng)的無線傳輸技術�？臻g調(diào)制是近年來提出的一種多天線空間復用技術,發(fā)送端單天線工作的結(jié)構,避免了信道間干擾(Inter Channel Interference,ICI)和天線間同步(Inter Antenna Synchronization,IAS)的問題。SM系統(tǒng)中將輸入信息比特分為兩部分分別映射到空間天線星座圖和信號星座圖上,在不增加系統(tǒng)帶寬和發(fā)射功率的前提下有效提高空間調(diào)制系統(tǒng)的頻帶利用率,克服了傳統(tǒng)MIMO系統(tǒng)的缺陷。因此,空間調(diào)制的思想一經(jīng)提出就引起了國內(nèi)外學者的廣泛關注。本文基于差分編碼的思想,在空間調(diào)制系統(tǒng)中提出了一種新的差分方案,即差分空間調(diào)制(Differential Spatial Modulation,DSM)。差分空間調(diào)制系統(tǒng)中,發(fā)送端結(jié)合差分的思想選擇天線傳輸調(diào)制信息,接收端依據(jù)差分的特點,提出了一種新的解調(diào)方法,差分直接檢測法,該解調(diào)算法不同于已有的解調(diào)算法,根據(jù)前后相鄰兩時刻接收信號向量的差的模值的差別進行解調(diào)。差分空間調(diào)制可在信道狀態(tài)信息未知時完成解調(diào),這點也是DSM系統(tǒng)的最大優(yōu)點�；诳臻g調(diào)制技術的研究背景和國內(nèi)外發(fā)展現(xiàn)狀,論文簡單介紹了SM基本原理和系統(tǒng)模型,深入研究分析了DSM實現(xiàn)方案。首先,對發(fā)送端兩根天線時的差分空間調(diào)制方案進行了具體闡述,包括發(fā)送端天線編碼方式,不同調(diào)制方式下接收端的具體解調(diào)步驟。從理論上推導分析了DSM的可行性,并進行了性能仿真,做出了性能曲線。其次,對發(fā)送端四根天線的情況分別給出了兩種實施方案,通過matlab仿真驗證了本文提出方法的可行性。結(jié)果表明DSM可在信道參數(shù)未知時實現(xiàn)解調(diào),具有較好的抗信道參數(shù)變化的性能。
[Abstract]:With the rapid development of mobile communication technology, people need ultra-high speed transmission rate, super large capacity, super reliability, anytime and anywhere access. In the face of increasing demand, communication resources are very scarce, which further requires the introduction of new wireless transmission technology. Spatial modulation (Spatial Modulation,SM), as a new transmission concept in multi-input multi-output (Multiple Input Multiple Output,MIMO) transmission technology, is likely to be used as the wireless transmission technology of the fifth generation mobile communication system. Spatial modulation is a multi-antenna spatial reuse technology proposed in recent years. The structure of single antenna at the transmitter avoids inter-channel interference (Inter Channel Interference,ICI) and synchronous (Inter Antenna Synchronization, between antennas. In SM system, the input information bits are mapped to the space antenna constellation diagram and the signal constellation diagram respectively, which can effectively improve the frequency band utilization of the space modulation system without increasing the system bandwidth and transmission power. The defects of traditional MIMO system are overcome. Therefore, as soon as the idea of spatial modulation is put forward, it has attracted extensive attention of scholars at home and abroad. In this paper, based on the idea of differential coding, a new difference scheme, differential spatial modulation (Differential Spatial Modulation,DSM), is proposed in spatial modulation system. In the differential space modulation system, the transmitter selects the idea of difference to transmit the modulation information. According to the characteristics of the difference, the receiver proposes a new demodulation method, the differential direct detection method. The demodulation algorithm is different from the existing demodulation algorithm, according to the difference of the received signal vector between the two adjacent times. Differential space modulation can Demodulate when the channel state information is unknown, which is also the biggest advantage of DSM system. Based on the research background of spatial modulation technology and the development status at home and abroad, this paper briefly introduces the basic principle and system model of SM, and deeply studies and analyzes the implementation scheme of DSM. Firstly, the differential spatial modulation scheme of two antennas at the transmitter is described in detail, including the coding mode of the transmitter antenna and the demodulation steps of the receiver under different modulation modes. The feasibility of DSM is deduced and analyzed theoretically, and the performance simulation is carried out, and the performance curve is made. Secondly, two implementation schemes are given for the four antennas at the transmitter, and the feasibility of the proposed method is verified by matlab simulation. The results show that DSM can realize demodulation when the channel parameters are unknown and has good performance against channel parameter variation.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN911.3

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本文編號：2479863