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一種基于短合成孔徑的雙星干涉精確定位方法

孫光才 王裕旗 高昭昭 江帆 邢孟道 保錚

孫光才, 王裕旗, 高昭昭, 江帆, 邢孟道, 保錚. 一種基于短合成孔徑的雙星干涉精確定位方法[J]. 電子與信息學(xué)報(bào), 2020, 42(2): 472-479. doi: 10.11999/JEIT180940
引用本文: 孫光才, 王裕旗, 高昭昭, 江帆, 邢孟道, 保錚. 一種基于短合成孔徑的雙星干涉精確定位方法[J]. 電子與信息學(xué)報(bào), 2020, 42(2): 472-479. doi: 10.11999/JEIT180940
Guangcai SUN, Yuqi WANG, Zhaozhao GAO, Fan JIANG, Mengdao XING, Zheng BAO. A Dual Satellite Interferometric Precise Localization Method Based on Short Synthetic Aperture[J]. Journal of Electronics & Information Technology, 2020, 42(2): 472-479. doi: 10.11999/JEIT180940
Citation: Guangcai SUN, Yuqi WANG, Zhaozhao GAO, Fan JIANG, Mengdao XING, Zheng BAO. A Dual Satellite Interferometric Precise Localization Method Based on Short Synthetic Aperture[J]. Journal of Electronics & Information Technology, 2020, 42(2): 472-479. doi: 10.11999/JEIT180940

一種基于短合成孔徑的雙星干涉精確定位方法

doi: 10.11999/JEIT180940
基金項(xiàng)目: 電子信息控制重點(diǎn)實(shí)驗(yàn)室基金(20170105)
詳細(xì)信息
    作者簡(jiǎn)介:

    孫光才:男,1984年生,博士,副教授,研究方向?yàn)楹铣煽讖嚼走_(dá)成像和動(dòng)目標(biāo)檢測(cè)

    王裕旗:男,1994年生,博士生,研究方向?yàn)楹铣煽讖嚼走_(dá)成像

    高昭昭:男,1982年生,博士,高級(jí)工程師,研究方向?yàn)槔走_(dá)信號(hào)處理和毫米波無源成像探測(cè)

    江帆:女,1988年生,博士,高級(jí)工程師,研究方向?yàn)殛嚵行盘?hào)處理與微波光子

    邢孟道:男,1975年生,博士,教授,研究方向?yàn)槔走_(dá)成像和目標(biāo)檢測(cè)與識(shí)別

    保錚:男,1927年生,中國(guó)科學(xué)院院士,研究方向?yàn)槔走_(dá)系統(tǒng)與雷達(dá)信號(hào)處理、動(dòng)目標(biāo)檢測(cè)、陣列信號(hào)處理、空時(shí)自適應(yīng)信號(hào)處理等

    通訊作者:

    孫光才 rsandsgc@126.com

  • 中圖分類號(hào): TN958

A Dual Satellite Interferometric Precise Localization Method Based on Short Synthetic Aperture

Funds: The Foundation of Science and Technology on Electronic Information Control Laboratory (20170105)
  • 摘要:

    雙星TDOA/FDOA聯(lián)合定位通過時(shí)差曲面和頻差曲面進(jìn)行定位,定位的精度受時(shí)差/頻差測(cè)量精度的影響。針對(duì)精確測(cè)量時(shí)差/頻差的需求,該文提出一種基于短合成孔徑的雙星干涉測(cè)量時(shí)差/頻差的方法,利用一定長(zhǎng)度的合成孔徑提高測(cè)量精度。對(duì)于窄帶信號(hào),該方法有估計(jì)單星多普勒頻率的能力,通過兩顆衛(wèi)星單獨(dú)估計(jì)的結(jié)果得到頻差;對(duì)于寬帶信號(hào),通過雙星數(shù)據(jù)干涉可以獲得頻差的高精度估計(jì)。對(duì)于短期穩(wěn)定的雷達(dá)信號(hào),STK仿真數(shù)據(jù)的處理結(jié)果證實(shí)了該方法在大范圍內(nèi)可以實(shí)現(xiàn)1 km的定位精度。

  • 圖  1  雙星信號(hào)模型

    圖  2  頻差測(cè)量算法流程

    圖  3  雙星定位模型

    圖  4  有噪聲的情況下干涉的相位圖

    圖  5  某個(gè)脈沖距離向剖面圖

    圖  6  LFM信號(hào)頻差均方誤差值隨信噪比變化

    圖  7  單頻信號(hào)頻差均方誤差值隨信噪比變化

    圖  8  時(shí)差均值隨信噪比的變化

    圖  9  雙星時(shí)差頻差定位的GDOP (km)

    表  1  STK仿真數(shù)據(jù)處理結(jié)果

    載頻(GHz)脈寬(μs)脈沖重復(fù)周期(μs)帶寬(MHz)基頻測(cè)量結(jié)果(Hz)基頻測(cè)量誤差(Hz)相對(duì)誤差(Hz)
    1.591010010–4781.533.97422.16
    1.5910100101710.531.8189
    1.781010010–1120.340.68524.20
    1.7810100102486.236.4891
    下載: 導(dǎo)出CSV

    表  2  時(shí)差頻差定位結(jié)果

    載頻(GHz)脈寬(μs)脈沖重復(fù)周期(μs)帶寬(MHz)目標(biāo)真實(shí)位置(m)目標(biāo)測(cè)量位置(m)相對(duì)誤差(m)
    1.591010010(6303534, –92215, 968286)(6303532, –92876, 968234)662
    1.591010010(6348796, –27959, 610439)(6348797, –27448, 610446)510
    1.781010010(6339522, –16218, 700588)(6339520, –16829, 700590)611
    1.781010010(6374947, 30978, 199294)(6374945, 30530, 199409)462
    下載: 導(dǎo)出CSV

    表  3  常規(guī)方法定位結(jié)果

    目標(biāo)真實(shí)位置(m)目標(biāo)測(cè)量位置(m)相對(duì)誤差(m)
    (6303534, –92215, 968286)(6303808, –91936, 970069)1825
    (6348796, –27959, 610439)(6348976, –28173, 612353)1935
    (6339522, –16218, 700588)(6339615, –16496, 701470)930
    (6374947, 30978, 199294)(6374905, 30788, 198028)1280
    下載: 導(dǎo)出CSV
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  • 收稿日期:  2018-10-09
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