【摘要】：隨著移動通信技術(shù)的高速發(fā)展,人們對通信系統(tǒng)的傳輸速率和通信可靠性有了更高的要求,有限的通信資源與日益增長的通信業(yè)務(wù)需求之間的矛盾已成為下一代移動通信亟待解決的關(guān)鍵問題。多輸入多輸出(MIMO)技術(shù)通過架設(shè)多根收發(fā)天線在保證系統(tǒng)可靠傳輸?shù)那疤嵯麓蠓鹊奶岣邤?shù)據(jù)傳輸速率,而系統(tǒng)的性能卻受信道干擾(ICI)、發(fā)端天線同步(ISA)以及復(fù)雜度較高的接收機(jī)檢測算法的限制�？臻g調(diào)制(SM)作為一種新的MIMO調(diào)制技術(shù),是將輸入信息比特分成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系統(tǒng)的頻帶利用率,克服了傳統(tǒng)MIMO調(diào)制技術(shù)的缺陷。 本文依據(jù)空間調(diào)制的概念對MIMO環(huán)境下空間調(diào)制系統(tǒng)的性能進(jìn)行深入研究�；诳臻g調(diào)制技術(shù)的研究背景以及國內(nèi)外發(fā)展現(xiàn)狀,論文首先介紹了空間調(diào)制的原理和系統(tǒng)模型,在瑞利衰落信道下針對不同的解調(diào)算法進(jìn)行仿真分析,同時(shí)研究了空移鍵控(SSK)和廣義空移鍵控(GSSK)調(diào)制技術(shù),并與空間調(diào)制的性能進(jìn)行比較。其次,對空間調(diào)制系統(tǒng)的誤碼性能進(jìn)行了理論分析,討論了空移鍵控和空間調(diào)制的幾種理論分析方法,通過逐步優(yōu)化空間調(diào)制的誤碼性能解析分析模型最終得到空間調(diào)制在任意MIMO場景下其性能的理論界限,并仿真驗(yàn)證了這種方法的準(zhǔn)確性。 為了進(jìn)一步研究空間調(diào)制的性能特點(diǎn),本文對非高斯噪聲衰落信道下的空間調(diào)制系統(tǒng)的誤碼性能進(jìn)行了研究。引入混合高斯信道模型并通過改變噪聲模型參數(shù)分析了在突發(fā)脈沖干擾環(huán)境下SM系統(tǒng)的誤碼性能,仿真結(jié)果表明空間調(diào)制具有較強(qiáng)的抗脈沖干擾能力。 此外,論文還對可見光通信(VLC)空間調(diào)制系統(tǒng)性能進(jìn)行了分析�；谑覂�(nèi)可見光的視距(LOS)傳輸信道模型,研究了在室內(nèi)MIMO環(huán)境下可見光通信系統(tǒng)(VLC)的光信道特性,并在可見光視距傳輸環(huán)境下通過改變LED發(fā)射機(jī)和接收機(jī)的位置因素仿真實(shí)現(xiàn)空間調(diào)制系統(tǒng),進(jìn)一步分析了空間調(diào)制技術(shù)在VLC系統(tǒng)的性能優(yōu)勢。
[Abstract]:With the rapid development of mobile communication technology, people have higher requirements for the transmission rate and communication reliability of the communication system. The contradiction between the limited communication resources and the increasing demand for communication services has become a key problem to be solved in the next generation of mobile communications. Multi-input multiple-output (MIMO) technology can greatly improve the data transmission rate by erecting multiple transceiver antennas to ensure the reliable transmission of the system. However, the performance of the system is limited by the channel interference (ICI), antenna synchronization (ISA) and the receiver detection algorithm with high complexity. As a new MIMO modulation technique, spatially modulated (SM) is divided into two parts, which are mapped to the space antenna constellation and the signal constellation, respectively. Without increasing the bandwidth and transmitting power of the system, the bandwidth efficiency of the system is improved effectively, and the defects of the traditional MIMO modulation technology are overcome. Based on the concept of spatial modulation, the performance of spatial modulation system in MIMO environment is studied in this paper. Based on the research background of spatial modulation technology and the development situation at home and abroad, this paper firstly introduces the principle and system model of spatial modulation, and simulates and analyzes different demodulation algorithms in Rayleigh fading channel. At the same time, the techniques of (SSK) and (GSSK) modulation are studied, and compared with the performance of spatial modulation. Secondly, the error performance of spatial modulation system is theoretically analyzed, and several theoretical analysis methods of space shift keying and spatial modulation are discussed. The theoretical bounds of the performance of spatial modulation in arbitrary MIMO scenes are finally obtained by using an analytical model of error performance analysis for progressive optimization of spatial modulation. The accuracy of this method is verified by simulation. In order to further study the performance characteristics of spatial modulation, the error performance of spatial modulation system in non-Gao Si noise fading channel is studied in this paper. The mixed Gao Si channel model is introduced and the error performance of SM system is analyzed by changing the parameters of the noise model. The simulation results show that spatial modulation has a strong anti-impulse interference capability. In addition, the performance of (VLC) spatial modulation system for visible light communication is analyzed. Based on the Indoor visible Light (LOS) transmission channel model, the optical channel characteristics of visible light communication system (VLC) in indoor MIMO environment are studied. The spatial modulation system is realized by changing the position factors of the LED transmitter and receiver under the visible line-of-sight transmission environment. The performance advantages of the spatial modulation technology in the VLC system are further analyzed.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN919.3

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本文編號：2219246