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  本文選題：GSM-R系統(tǒng) + 互調(diào)干擾��； 參考：《蘭州交通大學(xué)》2014年碩士論文

【摘要】：GSM-R系統(tǒng)是一種基于目前世界最成熟、最通用的公用無線通信系統(tǒng)平臺上的、專門為滿足鐵路應(yīng)用而開發(fā)的數(shù)字式無線通信系統(tǒng)。但是GSM-R系統(tǒng)通信信道受干擾影響大，在GSM-R系統(tǒng)無線通信工作的電磁環(huán)境中，無線傳輸過程中不可避免的會受到各方面噪聲的干擾。這時干擾會影響通信通話質(zhì)量、增加通話過程中的查錯，并且降低頻譜的使用效率。GSM-R系統(tǒng)作為鐵路專用移動通信系統(tǒng)，它的安全性和高效性將直接關(guān)系到我國鐵路事業(yè)和國民經(jīng)濟的發(fā)展，因此，我們要求GSM-R系統(tǒng)具有更高的可靠性，從而保障列車的安全運行。互調(diào)干擾是影響GSM-R系統(tǒng)安全的一大隱患，而目前解決互調(diào)干擾的方法都有它們的局限性，本文所做的主要工作就是對已有算法進行改進，能在抑制互調(diào)干擾的能力上有所改觀。本文的主要研究工作如下： (1)對GSM-R系統(tǒng)進行分析，介紹互調(diào)干擾產(chǎn)生的原因；并且介紹解決互調(diào)干擾的一些技術(shù)。對功率放大器線性化技術(shù)進行分析，并介紹目前的功率放大器線性化技術(shù)，包括前饋、反饋、自適應(yīng)預(yù)失真以及采用非線性元件組成的線性功放等，并對它們的工作原理以及對它們的優(yōu)缺點進行比較。 (2)對預(yù)失真線性化技術(shù)進行著重分析，主要針對預(yù)失真線性化技術(shù)進行研究，它比較穩(wěn)定、精度比較高，前景最看好，是放大器線性化的重要手段。改進現(xiàn)有算法，把數(shù)學(xué)中的二分法與割線法相結(jié)合，給出算法步驟，通過這種方法可以大致估測出含根區(qū)間，同時我們還可以通過割線的手段，加快算法的收斂速度，對算法進行測試。并對改進算法進行總結(jié)。 (3)構(gòu)建GSM-R系統(tǒng)網(wǎng)絡(luò)系統(tǒng)路徑損耗模型，并對基于頻率規(guī)劃的互調(diào)干擾算法進行比較。最后對互調(diào)干擾的抑制方法進行總結(jié)。
[Abstract]:GSM-R system is a kind of digital wireless communication system which is based on the most mature and universal public wireless communication system platform in the world and is specially developed to meet the railway application. However, the communication channel of GSM-R system is greatly affected by the interference. In the electromagnetic environment of GSM-R system wireless communication, it is inevitable that all kinds of noise will interfere in the process of wireless transmission. In this case, the interference will affect the communication quality, increase the error detection during the call process, and reduce the efficiency of the spectrum use. GSM-R system can be used as the railway special mobile communication system. Its safety and efficiency will be directly related to the development of our country's railway and national economy. Therefore, we require higher reliability of the GSM-R system to ensure the safe operation of the train. Intermodulation interference is a hidden trouble affecting the security of GSM-R system, and the methods to solve intermodulation interference have their limitations. The main work of this paper is to improve the existing algorithms and improve the ability of intermodulation interference suppression. The main work of this paper is as follows: 1) analyze the GSM-R system, introduce the causes of Intermodulation interference, and introduce some techniques to solve Intermodulation interference. The linearization technology of power amplifier is analyzed, and the current linearization technology of power amplifier is introduced, including feedforward, feedback, adaptive predistortion and linear power amplifier composed of nonlinear elements, etc. Their working principle and their advantages and disadvantages are compared. 2) the predistortion linearization technology is analyzed emphatically, and the predistortion linearization technology is mainly studied. It is stable, accurate and promising. It is an important means of amplifier linearization. By improving the existing algorithm, combining the dichotomy method with the Secant method, the steps of the algorithm are given. By this method, the root interval can be roughly estimated. At the same time, we can also speed up the convergence of the algorithm by means of the Secant. Test the algorithm. The improved algorithm is summarized. Thirdly, the path loss model of GSM-R network system is constructed, and the intermodulation interference algorithm based on frequency planning is compared. Finally, the methods of intermodulation interference suppression are summarized.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.532

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本文編號：1803261