本文選題：直升機(jī)衛(wèi)星通信　切入點(diǎn)：信道模型　出處：《電子科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：直升機(jī)由于自身顯著的在特點(diǎn)在民用和軍用方面都有極其重要的作用,特別是在自然災(zāi)害的緊急處理和營(yíng)救,軍事戰(zhàn)爭(zhēng)的偵查,運(yùn)輸和支援等方面凸顯了其重要性。在這些情況下,地面通信的網(wǎng)絡(luò)有可能遭到自然災(zāi)害或者敵軍的破壞而無(wú)法使用,直升機(jī)任務(wù)無(wú)法開(kāi)展,這極大地限制了直升機(jī)的用途。使用穩(wěn)定高速的直升機(jī)衛(wèi)星通信,保證了直升機(jī)正常通信和使用,可以挽回經(jīng)濟(jì)損失,拯救生命,扭轉(zhuǎn)戰(zhàn)局等,因此研究直升機(jī)衛(wèi)星通信,具有重要的價(jià)值。直升機(jī)衛(wèi)星通信關(guān)鍵技術(shù)研究與實(shí)現(xiàn),主要對(duì)象包括信道衰落模型、抗直升機(jī)旋翼遮擋通信和直升機(jī)衛(wèi)星通信方案。本文首先對(duì)直升機(jī)衛(wèi)星通信信道的特點(diǎn)進(jìn)行分析,然后根據(jù)國(guó)內(nèi)外大量權(quán)威的實(shí)驗(yàn)或統(tǒng)計(jì)數(shù)據(jù),定性的分析了直升機(jī)衛(wèi)星信道的特點(diǎn)并基于一些成熟的信道模型提出了直升機(jī)衛(wèi)星通信信道的衰落模型,并使用MATLAB對(duì)其典型取值的分布進(jìn)行了仿真分析。然后針對(duì)直升機(jī)旋翼遮擋,本文逐個(gè)仿真分析了卷積編碼,交織編碼,哈達(dá)瑪矩陣變換,雙重時(shí)間分集,空間分集和極化分集等手段對(duì)遮擋系統(tǒng)誤碼性能的改善情況,并比較了平均功率滑動(dòng)窗口檢測(cè)方法和判決反饋滑動(dòng)窗口檢測(cè)方法的遮擋檢測(cè)技術(shù)性能。然后對(duì)這些方法進(jìn)行了有機(jī)組合,仿真分析組合方法對(duì)遮擋系統(tǒng)性能的影響,總結(jié)出最優(yōu)的抗遮擋通信組合方法。最后對(duì)于頻帶通信,本文結(jié)合傳輸?shù)臈l件和抗遮擋通信的方法,首先對(duì)通信方案進(jìn)行了設(shè)計(jì),解決了傳輸過(guò)程中多普勒頻移和直升機(jī)旋翼遮擋以及噪聲影響等問(wèn)題。然后對(duì)通信方案中采用的關(guān)鍵技術(shù)包括幀格式設(shè)計(jì)、載波同步、殘留頻偏補(bǔ)償?shù)脑O(shè)計(jì)原則進(jìn)行了原理分析和仿真驗(yàn)證,最后在Xilinx的XC7K325T芯片上對(duì)通信方案的系統(tǒng)模塊進(jìn)行了FPGA實(shí)現(xiàn),對(duì)載波同步和殘留頻偏補(bǔ)償?shù)汝P(guān)鍵模塊的實(shí)現(xiàn)原理和結(jié)果進(jìn)行了驗(yàn)證,并評(píng)估了硬件實(shí)現(xiàn)的資源消耗情況。
[Abstract]:Because of its remarkable characteristics in the helicopter in civil and military aspects are of great importance, especially in the natural disaster emergency rescue and investigation, military, transportation and support, highlighting its importance. In these cases, the ground communication network are likely to be hit by natural disasters or the destruction of the enemy to use the helicopter to carry out tasks, which greatly limits the use of helicopters. The use of stable helicopter satellite communication, to ensure the normal communication and the use of helicopters, can the economic losses, save lives, to reverse the situation, so the study of helicopter satellite communication, has important value. The research and implementation of key technologies of helicopter satellite the main object of communication, including the channel fading model, anti helicopter occlusion communication and helicopter satellite communication scheme. Firstly, the helicopter Wei The characteristics of satellite communication channel are analyzed, then according to a large number of domestic and foreign authoritative experimental and statistical data, the qualitative analysis of the characteristics of the helicopter satellite channel and based on some mature channel model is presented in helicopter satellite communication channel fading model, and use the MATLAB for its typical value distribution are simulated and analyzed. Then the occlusion of the helicopter in this paper, by simulation analysis of the rotor, convolutional encoding, interleaving encoding, Hadamard matrix transform, dual time diversity, space diversity and polarization diversity and other means to improve the situation from the BER performance of the system, performance testing technology and compared the average power block sliding window detection method and decision feedback sliding window detection method. Then the organic the combination of these methods, the simulation analysis method of combination of occlusion of system performance, sums up the best anti block communication The combination method. Finally the method based on frequency communication, transmission conditions and anti blocking communication, the communication protocol was designed and solved in the process of transmission of Doppler frequency shift and helicopter rotor occlusion and noise problems. Then the key technologies of communication scheme adopted in the design including frame format, carrier synchronization. The design principle of residual frequency offset compensation of principle analysis and simulation verification, finally in the XC7K325T chip Xilinx of FPGA to realize the system module of communication scheme, implementation principle and results of the carrier synchronization and residual frequency offset compensation and other key modules are verified, and to evaluate the consumption of hardware resources.

【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：V243.1;TN927.2

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本文編號(hào)：1624218