對流層散射超視距信道傳輸損耗快慢衰落特性研究

衛(wèi)佩佩; 杜曉燕; 江長蔭

doi:10.11999/JEIT170952

對流層散射超視距信道傳輸損耗快慢衰落特性研究

doi: 10.11999/JEIT170952 cstr: 32379.14.JEIT170952

^①(解放軍信息工程大學(xué)信息系統(tǒng)工程學(xué)院鄭州 450002) ^②(中國電波傳播研究所新鄉(xiāng) 453003)

詳細(xì)信息

作者簡介:
衛(wèi)佩佩：女，1990年生，博士生，研究方向為電波傳播、電磁計算及反演問題等. 杜曉燕：女，1975年生，副教授，主要從事電磁場、微波技術(shù)與天線等的教學(xué)和科研工作. 江長蔭：男，1936年生，研究員，主要從事無線電波傳播研究工作.

中圖分類號: TN929.2
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出版歷程
- 收稿日期: 2017-10-18
- 修回日期: 2018-01-15
- 刊出日期: 2018-07-19

Study on Tropospheric Scatter Beyond-line-of-sight Channel Transmission Loss for Short-term and Long-term Fading

WEI Peipei^① DU Xiaoyan^① JIANG Changyin^②

摘要

摘要: 對流層散射通信是一種地面微波超視距傳播的重要手段。針對現(xiàn)有對流層散射傳輸損耗預(yù)測模型無法描述大氣環(huán)境等因素隨機(jī)變化問題，該文基于電場強(qiáng)度的快慢衰落特性，首次開展了傳輸損耗的快慢衰落特性研究，建立了傳輸損耗分布模型，并結(jié)合ITU-R P.617-3給出了該分布待定參數(shù)的計算方法。選取了國際電信聯(lián)盟公布的部分散射鏈路試驗數(shù)據(jù)，借助正態(tài)分布的坐標(biāo)圖紙，驗證了該分布模型的有效性，結(jié)果表明傳播損耗慢衰落特性服從正態(tài)分布，可為下一步計算散射鏈路誤碼率奠定基礎(chǔ)。此外，基于分布模型還提出一種傳輸損耗預(yù)測方法，并利用試驗數(shù)據(jù)驗證了所提方法具有較好的精度，克服了現(xiàn)有方法無法計算任意概率傳輸損耗的問題。
- 對流層散射通信 /
- 超視距傳播 /
- 傳輸損耗快慢衰落特性 /
- 正態(tài)分布
Abstract: Tropospheric scatter (Troposcatter) communication is an important means for ground microwave beyond-line-of-sight propagation. Available troposcatter transmission loss models are inefficient to describe the random variables resulting from atmosphere environment and other factors. Therefore, this paper studies the short-term fading and long-term fading characteristics of transmission loss based on those of electric field strength for the first time. The distribution model of transmission loss is modeled, whose parameters are estimated referring to ITU-R P.617-3. Parts of measured scatter links data from International Telecommunication Union (ITU) are chosen to verify this model with normal distribution graph. The result shows that the long-term fading of transmission obeys the normal distribution. It gives the basis of calculating error bit for the further work. In addition, a transmission loss prediction method is proposed based on its distribution model. It is verified to have a good accuracy using measured data, and this method address the problem that available transmission loss methods can not predict the values at any time percentages.
- Tropospheric scatter communication、Beyond-line-of-sight propagation、Short-term fading and long-term fading of transmission loss、Normal distribution /

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參考文獻(xiàn)(25)

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