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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
  • 1.

    西安電子科技大學(xué)雷達(dá)信號(hào)處理國(guó)家重點(diǎn)實(shí)驗(yàn)室 西安 710071

  • 2.

    電子信息控制重點(diǎn)實(shí)驗(yàn)室 成都 610036

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

  • 1.

    National Laboratary of Radar Signal Processing, Xidian University, Xi’an 710071, China

  • 2.

    Science and Technology on Electronic Information Control Laboratory, Chengdu 610036, China

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。

    Abstract:

    Dual satellite TDOA/FDOA localization is achieved by the TDOA hyperboloid and FDOA hyperboloid. The accuracy of localization is affected by TDOA/FDOA accuracy. In order to measure accurately the TDOA/FDOA, a method of TDOA/FDOA measurement based on short synthetic aperture is presented. This method improves the measurement accuracy by using a certain length of synthetic aperture. For narrowband signals, the method has the ability to estimate a single satellite Doppler frequency, and the frequency difference can be obtained from the results estimated by the two satellites. For wideband signals, high-precision estimates of frequency differences can be obtained by dual satellite data interference. For short-term stable radar signals, the processing results of STK simulation data confirm the effectiveness of the proposed method.

    • HTML全文

  • 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
  • 修回日期:  2019-07-18
  • 網(wǎng)絡(luò)出版日期:  2019-09-17
  • 刊出日期:  2020-02-19

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