本文關(guān)鍵詞：調(diào)頻發(fā)射系統(tǒng)干擾研究及干擾檢測儀設(shè)計　出處：《上海交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 調(diào)頻發(fā)射系統(tǒng) 殘波輻射 互調(diào)干擾 調(diào)頻干擾檢測

【摘要】：近年來,隨著各種無線電通信業(yè)務(wù)的發(fā)展,調(diào)頻廣播干擾事件逐漸增多。最為嚴(yán)重的是對民航通信的干擾,將直接影響飛行安全。如何有效解決調(diào)頻干擾問題,成為了調(diào)頻發(fā)射臺急需研究的問題。通過理論研究發(fā)現(xiàn),調(diào)頻發(fā)射系統(tǒng)的干擾主要體現(xiàn)為互調(diào)干擾。影響互調(diào)干擾的因素有許多,主要有發(fā)射機(jī)殘波功率異常、天饋系統(tǒng)隔離指標(biāo)下降及臺站設(shè)計不合理這三方面。本文根據(jù)實(shí)際的干擾案例,通過測量調(diào)頻發(fā)射系統(tǒng)各環(huán)節(jié)殘波輻射及互調(diào)干擾的頻譜情況,著重研究了調(diào)頻發(fā)射系統(tǒng)的干擾信號的特點(diǎn),并提出了相應(yīng)的干擾解決方案。本文參考米波調(diào)頻發(fā)射標(biāo)準(zhǔn),并結(jié)合干擾信號的特點(diǎn),設(shè)計了一種調(diào)頻發(fā)射系統(tǒng)干擾檢測設(shè)備。設(shè)備能不間斷地對發(fā)射臺所有播出頻率的殘波(二次諧波)指標(biāo)進(jìn)行檢測。當(dāng)不達(dá)標(biāo)時,設(shè)備可提供報警提示,提醒值班人員予以注意。本設(shè)備提高了調(diào)頻發(fā)射臺的干擾應(yīng)對能力。本文研究的內(nèi)容具有一定的應(yīng)用意義,可作為調(diào)頻廣播與民航通信之間干擾問題解決的參考文本。
[Abstract]:In recent years, with the development of various radio communication services, the number of FM jamming incidents is increasing gradually. The most serious interference to civil aviation communications will directly affect flight safety. How to effectively solve the FM jamming problem. Through the theoretical research, it is found that the interference of FM transmission system is mainly reflected in intermodulation interference. There are many factors that affect the intermodulation interference, mainly the abnormal residual power of transmitter. In this paper, according to the actual interference cases, the frequency spectrum of residual wave radiation and intermodulation interference in every link of FM transmission system is measured. This paper focuses on the characteristics of the interference signal of FM transmission system and puts forward the corresponding interference solution. This paper refers to the meter wave FM transmission standard and combines the characteristics of the jamming signal. A kind of interference detection equipment of FM transmission system is designed. The equipment can continuously detect the residual (second harmonic) index of all broadcasting frequencies of the transmitter. When it is not up to the standard, the equipment can provide alarm warning. The equipment has improved the interference response ability of FM transmitter. The content of this paper has certain application significance. It can be used as a reference text to solve the interference problem between FM broadcasting and civil aviation communication.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN972

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本文編號：1407629