本文選題：IMT-Advanced信道模型 + VOFDM��； 參考：《西安電子科技大學》2014年碩士論文

【摘要】：在第四代移動通信系統(tǒng)標準的高級國際移動通信(IMT-Advanced)中,我們采用的信道是以空間信道模型(Space Channel Model,SCM)為基礎進行場景擴展與修正之后得到的信道模型。IMT-Advanced信道模型充分結合了空間傳輸特性,采用了幾何射線跟蹤法對信號在信道中的傳輸過程進行模擬,從而可以充分體現(xiàn)IMT-Advanced信道在空間、時間以及頻率上的特性。本文首先完成的研究工作是根據(jù)國際電信聯(lián)盟(ITU)M.2135標準文件中的參數(shù)要求通過軟件設計實現(xiàn)的方式對IMT-Advanced空間信道模型進行具體的建模,具體的軟件建模方式是通過使用Windows環(huán)境下的C/C++來完成。其中對信道模型的編程設計內容主要是圍繞大、小尺度衰落模型兩部分,然后通過兩部分計算結果的整合進行信道相應的計算從而完成對信道特性的仿真分析與研究。其次,本論文研究該模型下基于矢量正交頻分復用(VOFDM)的寬帶無線傳輸技術的性能。由于VOFDM系統(tǒng)主要是用于對抗多徑效應對信號傳輸造成的影響,而高斯信道基于VOFDM和OFDM采用編碼調制系統(tǒng)的性能應該是一致的,我們首先通過一次仿真來說明。接下來我們在已經(jīng)建好的IMT-Advanced信道模型基礎上進行多徑信道的擴展,并分別采用VOFDM技術結合頻域均衡方法以及OFDM技術結合頻域均衡方法來對抗多徑效應恢復原始信號,并通過采用不同編碼方案下進行了具體的系統(tǒng)仿真。最后對仿真得到的結果進行對比分析,得出VOFDM系統(tǒng)抗衡多徑效應的能力優(yōu)于OFDM系統(tǒng)的結論。
[Abstract]:In IMT-Advanced, the fourth-generation standard for mobile communication systems, The channel we adopt is based on the space Channel model (SCM). The channel model. IMT-Advanced channel model, which is based on the scene expansion and modification, fully integrates the spatial transmission characteristics. The geometric ray tracing method is used to simulate the transmission process of the signal in the channel, so that the characteristics of the IMT-Advanced channel in space, time and frequency can be fully reflected. The first research work of this paper is to model the IMT-Advanced spatial channel model by software design and implementation according to the requirements of the parameters in ITU M.2135 standard document of the International Telecommunication Union (ITU). Specific software modeling is done by using C / C in the Windows environment. The programming design of channel model is mainly focused on two parts: large scale and small scale fading model. Then the channel characteristic is simulated and studied by integrating the results of the two parts. Secondly, this paper studies the performance of wideband wireless transmission technology based on vector orthogonal frequency division multiplexing (VOFDM). Because VOFDM system is mainly used to counter the influence of multipath effect on signal transmission, the performance of coding modulation system based on VOFDM and OFDM in Gao Si channel should be consistent. Then we extend the multipath channel based on the established IMT-Advanced channel model, and adopt VOFDM technology combined with frequency domain equalization method and OFDM technology combined frequency domain equalization method to counteract the multipath effect to recover the original signal, respectively. And through adopting different coding scheme to carry on the concrete system simulation. Finally, the simulation results are compared and analyzed, and it is concluded that the VOFDM system is superior to the OFDM system in its ability to counteract the multipath effect.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.5

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1 賈紅蕾;基于VOFDM的編碼調制系統(tǒng)在IMT-Advanced信道中的性能研究[D];西安電子科技大學;2014年

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本文編號：1787884