本文選題：L波段數(shù)字航空通信系統(tǒng)1 + ICI��； 參考：《中國(guó)民航大學(xué)》2017年碩士論文

【摘要】：為了滿足未來(lái)航空通信系統(tǒng)的要求,L波段數(shù)字航空通信系統(tǒng)1(L-DACS1)系統(tǒng)應(yīng)運(yùn)而生。L-DACS1系統(tǒng)是一種多應(yīng)用蜂窩寬帶系統(tǒng),能夠同時(shí)提供各種空中交通服務(wù)(ATS)和航空運(yùn)行管理(AOC)通信服務(wù)。由于L波段已經(jīng)被諸如DME的其它系統(tǒng)利用,空閑的光譜資源稀缺且難以分配。為了合理利用現(xiàn)有的頻譜資源,L-DACS1系統(tǒng)以內(nèi)嵌方式部署在DME波段間。針對(duì)測(cè)距儀脈沖信號(hào)干擾OFDM接收機(jī)的關(guān)鍵技術(shù)問(wèn)題,本論文開(kāi)展了基于BICM-ID的測(cè)距儀脈沖干擾抑制的研究,論文開(kāi)展以下主要研究:第一,對(duì)DME干擾影響L-DACS1系統(tǒng)OFDM接收機(jī)的問(wèn)題進(jìn)行研究。首先,給出航空無(wú)線電導(dǎo)航具體頻譜分布;然后,開(kāi)展DME信號(hào)對(duì)L-DACS1系統(tǒng)接收機(jī)干擾分析:進(jìn)行DME信號(hào)干擾功率計(jì)算,并給出了閉合表達(dá)式;最后,通過(guò)計(jì)算機(jī)仿真表明:測(cè)距儀脈沖干擾會(huì)嚴(yán)重惡化L-DACS1系統(tǒng)傳輸鏈路的可靠性。第二,提出了一種基于壓縮感知與ICI補(bǔ)償?shù)腂ICM-ID脈沖干擾抑制方法。首先,將接收信號(hào)分別送入子載波間干擾補(bǔ)償(ICI)支路與壓縮感知支路;在ICI支路,針對(duì)脈沖熄滅后產(chǎn)生的ICI干擾進(jìn)行時(shí)域補(bǔ)償,補(bǔ)償過(guò)程屬于迭代過(guò)程;迭代收斂后,將來(lái)自ICI補(bǔ)償支路的軟信息送入壓縮感知脈支路,同時(shí),將來(lái)自壓縮感知支路譯碼器輸出的軟信息送入ICI補(bǔ)償支路;迭代譯碼使得解調(diào)器與譯碼器之間能夠相互傳遞信息,從而使得彼此能夠從相互傳遞的信息中受益,最終實(shí)現(xiàn)譯碼器性能的提高。仿真結(jié)果表明:基于聯(lián)合壓縮感知與ICI補(bǔ)償?shù)腂ICM-ID干擾消除方案可以有效抑制測(cè)距儀脈沖干擾,從而提升L-DACS1系統(tǒng)鏈路傳輸?shù)目煽啃浴?br/>[Abstract]:In order to meet the requirements of future aviation communication systems, L-DACS1 (L-DACS1) system emerges as the times require. The L-DACS1 system is a kind of multi-application cellular broadband system, which can provide various air traffic services (ATS) and aviation operation management (AOC) communication services at the same time. Since L-band has been used by other systems such as DME, free spectral resources are scarce and difficult to allocate. In order to make rational use of the existing spectrum resource, the L-DACS1 system is embedded in the DME band. Aiming at the key technical problems of the range finder pulse signal jamming OFDM receiver, this paper develops the research of the range finder pulse interference suppression based on BICM-ID. The main research work is as follows: first, The influence of DME interference on OFDM receiver in L-DACS1 system is studied. First, the specific spectrum distribution of aeronautical radio navigation is given. Then, the interference analysis of DME signal to L-DACS1 system receiver is carried out: the interference power of DME signal is calculated, and the closed expression is given. The computer simulation shows that the pulse interference of the range finder will seriously deteriorate the reliability of the transmission link of the L-DACS1 system. Secondly, a BICM-ID pulse interference suppression method based on compression sensing and ICI compensation is proposed. First of all, the received signals are fed into the ICI branch and the compression sensing branch, respectively. In the ICI branch, the ICI interference caused by the pulse extinguishing is compensated in time domain, and the compensation process is an iterative process. The soft information from the ICI compensation branch is fed into the compressed sensing pulse branch, and the soft information from the compressed sensing branch decoder is fed into the ICI compensation branch.; the iterative decoding enables the demodulator and the decoder to transmit information to each other. Thus, each other can benefit from the information transmitted to each other, and finally improve the performance of the decoder. The simulation results show that the BICM-ID interference cancellation scheme based on joint compression sensing and ICI compensation can effectively suppress the pulse interference of the rangefinder and improve the reliability of the L-DACS1 system link transmission.
【學(xué)位授予單位】：中國(guó)民航大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：V243.1;TN972

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