基于改進單天線投影算法的廣播式自動相關(guān)監(jiān)視信號分離
doi: 10.11999/JEIT190673 cstr: 32379.14.JEIT190673
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中國民航大學天津市智能信號與圖像處理重點實驗室 天津 300300
基金項目: 國家自然科學基金(U1833112)
Signal Separation for Automatic Dependent Surveillance-Broadcast Using Improved Single Antenna Project Algorithm
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Tianjin Key Laboratory for Advanced Signal Processing, Civil Aviation University of China, Tianjin 300300, China
Funds: The National Natural Science Foundation of China (U1833112)
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摘要: 廣播式自動相關(guān)監(jiān)視(ADS-B)作為一種新的監(jiān)視技術(shù)正受到國際民用航空組織(ICAO)的大力推廣。然而，由于ADS-B信號傳輸具有隨機性，多條信號交織問題不可避免。該文提出一種改進的單天線投影算法(PASA)。利用單通道分離交織信號，首先對單通道接收到的數(shù)據(jù)提出一種新的矩陣重構(gòu)方式，從而降低兩條信號之間的相對時延和頻偏要求；然后利用投影算法分離交織信號。仿真實驗結(jié)果驗證了該算法的有效性。
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關(guān)鍵詞:
- 廣播式自動相關(guān)監(jiān)視 /
- 信號解交織 /
- 單通道 /
- 矩陣重構(gòu)
Abstract: The Automatic Dependent Surveillance-Broadcast (ADS-B), as a new surveillance technology, is being vigorously promoted by International Civil Aviation Organization (ICAO). However, overlapping among multiple signals is inevitable because of the randomness of ADS-B signal transmission. An improved Project Algorithm Single Antenna (PASA) algorithm which separates the overlapping signals with one single channel is proposed. Firstly, a new matrix reconstruction method for the data that received by single channel is proposed to decrease the requirement of relative time delay and frequency difference between two ADS-B signals, and then the overlapping signals can be separated by utilizing the projection algorithm. The effectiveness of the algorithm is verified by simulation experiments. -
表 1 兩種算法復雜度對比
改進PASA PASA 算法復雜度 $23N_1^3 + 3kN_1^2 + 6{k^2} + 14k$ $23{M_1}N_2^3 + 3k{M_1}N_2^2 + 6{k^2} + 14k$ $ - k{N_1} - N_1^2 + 8$ $ - k{M_1}{N_2} - {M_1}N_2^2 + 8$ 
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表 2 接收機解碼結(jié)果
AA DF 消息類型 高度(m) 經(jīng)度(°) 緯度(°) 信號1 780AAA 17 空中位置消息 10000 117.5 37.5 信號2 780ABC 17 空中位置消息 11000 110.5 31.5
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