本文選題：DSP　切入點：瑞利信道　出處：《電子科技大學》2014年碩士論文

【摘要】：無線信道是整個無線通信系統(tǒng)的核心研究內容。無線通信系統(tǒng)在進行外場測試信道環(huán)境時,不僅具有容易受氣候條件的影響,試驗不可重復性等特點,而且還要花費大量的人力、物力和財力。而信道仿真器可以在實驗室內模擬各種典型的無線信道環(huán)境,它不易受外界環(huán)境的影響,可以降低試驗成本,并且試驗還具有可重復性。因此本論文就以多制式寬帶通信模擬測試技術為研究背景,主要研究了該項目中的信道模擬技術的相關理論以及實現算法,并以DSP為硬件平臺,對多制式寬帶通信多徑衰落信道模擬技術進行了實現,在現有平臺的基礎上,為通信系統(tǒng)的測試加入了信道環(huán)境。本文首先研究了無線移動信道的基本特性。其次研究了衰落信道模擬的算法仿真,它們包括:瑞利信道模型、萊斯信道模型、高斯信道模型以及信道模擬中的多徑延時等。通過對這些原理的研究,推導了它們的具體實現算法。然后在此基礎上,本文以DSP為硬件平臺,搭建了無線衰落信道模擬實現的整體架構,詳細分析了架構的總體設計方案及功能模塊的設計方案。整個模塊由多制式信號、多徑延時、瑞利衰落、萊斯衰落、高斯信道等單元模塊組成。隨后用Matlab對多制式信號的產生、信道模擬中多徑延時算法、瑞利衰落因子和萊斯衰落因子產生及其統(tǒng)計特性、高斯白噪聲產生算法等功能模塊進行了仿真研究。其次介紹了本文所選芯片TMS320C6416TGLZ的結構和功能及其開發(fā)環(huán)境,給出了衰落信道模擬以及多徑延時算法的具體軟件實現方案,并在DSP中進行了實現。最后,重點研究了以DSP為核心的無線衰落信道模擬整體功能的實現,使用頻譜分析儀測試基帶信號QPSK通過模擬信道后的矢量圖,然后對其矢量圖進行分析,采用Matlab對信道模擬的仿真結果進行了驗證,通過與理論值進行對比,可以證明論文所提出的信道模擬算法是切實可行的。通過對相關理論的分析和推導、相應算法的仿真驗證以及DSP平臺實現,本文最終在理論算法研究和硬件實現兩方面均很好地完成了無線衰落信道模擬技術的實現。通過測試和驗證,所得結果符合項目指標要求。
[Abstract]:Wireless channel is the core research content of the whole wireless communication system. When the wireless communication system carries on the external field test channel environment, it is not only easy to be affected by the climatic conditions, but also not repeatable. And it also costs a lot of manpower, material and financial resources. The channel simulator can simulate a variety of typical wireless channel environments in the laboratory, it is not easily affected by the external environment, and it can reduce the cost of the experiment. And the experiment is repeatable. Therefore, this paper mainly studies the theory and algorithm of channel simulation technology in this project, and takes DSP as the hardware platform. The simulation technology of multipath fading channel for multi-standard broadband communication is implemented. On the basis of the existing platforms, The basic characteristics of wireless mobile channel are studied in this paper. Secondly, the algorithm simulation of fading channel simulation is studied, which includes Rayleigh channel model, Rice channel model, Rayleigh channel model and Rice channel model. Gao Si channel model and multipath delay in channel simulation. Through the research of these principles, the realization algorithm of Gao Si channel model and channel simulation is deduced. Based on this, this paper takes DSP as the hardware platform, The overall architecture of wireless fading channel simulation is built, and the overall design scheme and function module are analyzed in detail. The whole module is composed of multi-standard signal, multi-path delay, Rayleigh fading and Rice fading. Gao Si channel and other unit modules. Then the generation of multi-standard signals with Matlab, the multipath delay algorithm in channel simulation, the generation of Rayleigh fading factor and Rice fading factor and their statistical characteristics, Gao Si white noise generation algorithm and other functional modules are simulated. Secondly, the structure, function and development environment of the chip TMS320C6416TGLZ selected in this paper are introduced, and the specific software implementation scheme of fading channel simulation and multipath delay algorithm is given. Finally, the realization of the overall function of wireless fading channel simulation based on DSP is studied, and the vector diagram of baseband signal QPSK passing through the analog channel is tested by spectrum analyzer. Then the vector diagram is analyzed, and the simulation results of channel simulation are verified by Matlab, and the results are compared with the theoretical values. It can be proved that the proposed channel simulation algorithm is feasible. Through the analysis and derivation of the relevant theories, the simulation of the corresponding algorithm and the implementation of DSP platform, In this paper, the simulation technology of wireless fading channel is well realized in the aspects of theoretical algorithm research and hardware implementation. Through testing and verification, the results are in line with the requirements of the project.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN92

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相關期刊論文 前1條

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本文編號：1672845