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一種提升汽車(chē)?yán)走_(dá)方位角分辨率的成像處理方法

王同軍,  吳鋒,  徐偉

王同軍, 吳鋒, 徐偉. 一種提升汽車(chē)?yán)走_(dá)方位角分辨率的成像處理方法[J]. 電子與信息學(xué)報(bào), 2020, 42(8): 2037-2044. doi: 10.11999/JEIT190618
引用本文: 王同軍, 吳鋒, 徐偉. 一種提升汽車(chē)?yán)走_(dá)方位角分辨率的成像處理方法[J]. 電子與信息學(xué)報(bào), 2020, 42(8): 2037-2044. doi: 10.11999/JEIT190618
Tongjun WANG, Feng WU, Wei XU. A Novel Imaging Approach for Improving Azimuth Angular Resolution of Automotive Radars[J]. Journal of Electronics & Information Technology, 2020, 42(8): 2037-2044. doi: 10.11999/JEIT190618
Citation: Tongjun WANG, Feng WU, Wei XU. A Novel Imaging Approach for Improving Azimuth Angular Resolution of Automotive Radars[J]. Journal of Electronics & Information Technology, 2020, 42(8): 2037-2044. doi: 10.11999/JEIT190618

一種提升汽車(chē)?yán)走_(dá)方位角分辨率的成像處理方法

doi: 10.11999/JEIT190618 cstr: 32379.14.JEIT190618
  • 1.

    信陽(yáng)農(nóng)林學(xué)院信息工程學(xué)院 信陽(yáng) 464000

  • 2.

    內(nèi)蒙古工業(yè)大學(xué)信息工程學(xué)院 呼和浩特 010051

基金項(xiàng)目: 河南省科技攻關(guān)項(xiàng)目(172102210450, 182102210533, 182102110160)，河南省高等學(xué)校重點(diǎn)科研項(xiàng)目(18B520035)
詳細(xì)信息
    作者簡(jiǎn)介:

    王同軍：男，1985年生，講師，研究方向?yàn)榻煌ōh(huán)境智能感知、高速信息處理、物聯(lián)網(wǎng)應(yīng)用

    吳鋒：男，1981年生，講師，研究方向?yàn)樾盘?hào)處理、無(wú)線數(shù)據(jù)通信、物聯(lián)網(wǎng)技術(shù)

    徐偉：男，1983年生，教授，研究方向?yàn)樾麦w制雷達(dá)系統(tǒng)、微波遙感應(yīng)用

    通訊作者:

    王同軍　xy_wangtj@126.com

  • 中圖分類(lèi)號(hào): TN951

A Novel Imaging Approach for Improving Azimuth Angular Resolution of Automotive Radars

  • 1.

    College of Information Engineering, Xinyang Agriculture and Forestry University, Xinyang 464000, China

  • 2.

    College of Information Engineering, Inner Mongolia University of Technology, Hohhot 010051, China

Funds: The Scientific and Technological Project in Henan Province (172102210450, 182102210533, 182102110160), The Key Scientific Research Projects in Institutions of Henan Higher Learning (18B520035)
  • 摘要:

    針對(duì)汽車(chē)?yán)走_(dá)方位角分辨率受方位向天線長(zhǎng)度限制的問(wèn)題，該文提出一種基于多波束實(shí)孔徑雷達(dá)圖像融合來(lái)提升汽車(chē)?yán)走_(dá)方位角分辨率的成像方法。該方法首先利用相控陣天線波束電掃描來(lái)獲取前視實(shí)孔徑雷達(dá)圖像，然后根據(jù)汽車(chē)?yán)走_(dá)成像幾何關(guān)系通過(guò)多張多角度實(shí)孔徑雷達(dá)圖像相參累加來(lái)提升雷達(dá)方位角分辨率。計(jì)算機(jī)仿真結(jié)果驗(yàn)證了該方法在提升汽車(chē)?yán)走_(dá)方位角分辨率的有效性。

    Abstract:

    As the azimuth angular resolution is limited by the antenna length in automotive radars, a novel imaging approach for improving azimuth angular resolution of automotive radars is proposed based on multi-beam real-aperture radar images combination processing. Firstly, the antenna beam of the phased array antenna is electronically scanned to obtain forward-looking real-aperture radar images. Afterwards, multiple real-aperture radar images are coherent accumulated according to the imaging geometry of automotive radar to improve azimuth angular resolution. Simulation results validate the proposed imaging approach to improve the azimuth angular resolution of automotive radar.

    • HTML全文

  • 圖  1  提升方位分辨率的前視成像雷達(dá)工作方式示意圖

    圖  2  提升方位分辨率的前視成像雷達(dá)工作方式示意圖

    圖  3  成像處理流程圖

    圖  4  成像區(qū)域打網(wǎng)格處理示意圖

    圖  5  方位角分辨率仿真結(jié)果

    圖  6  點(diǎn)陣目標(biāo)場(chǎng)景設(shè)置

    圖  7  點(diǎn)陣目標(biāo)場(chǎng)景設(shè)置

    圖  8  前視成像雷達(dá)實(shí)孔徑點(diǎn)目標(biāo)插值處理后的等高線(10 m合成孔徑)

    圖  9  前視成像雷達(dá)高分辨合成孔徑點(diǎn)目標(biāo)插值處理后的等高線(15 m合成孔徑)

    圖  10  前視成像雷達(dá)高分辨合成孔徑點(diǎn)目標(biāo)插值處理后的等高線(5 m合成孔徑)

    表  1  車(chē)載前視成像雷達(dá)仿真參數(shù)

    參數(shù)數(shù)值
    雷達(dá)載頻96 GHz
    方位向天線長(zhǎng)度0.3 m
    系統(tǒng)PRF4000 Hz
    脈沖寬度80 μs
    信號(hào)帶寬1 GHz
    去斜接收后雷達(dá)信號(hào)采樣率150 MHz
    AD量化位數(shù)12位
    方位波束掃描角度范圍±15°
    雷達(dá)作用距離20～300 m
    波束躍度0.3°
    合成孔徑長(zhǎng)度10 m
    汽車(chē)速度15 m/s
    下載: 導(dǎo)出CSV

    表  2  點(diǎn)目標(biāo)聚焦性能指標(biāo)

    模式目標(biāo)距離向方位向
    分辨率(m)PSLR(dB)ISLR(dB)分辨率(°)PSLR(dB)ISLR(dB)
    實(shí)孔徑圖像P10.09–13.26–9.980.390–26.40–22.24
    P20.09–13.26–9.980.380–26.52–22.47
    P30.09–13.26–9.980.390–26.40–22.24
    實(shí)孔徑理論值P10.09–13.26–9.800.380–26.60–22.30
    P20.09–13.26–9.800.380–26.60–22.30
    P30.09–13.26–9.800.380–26.60–22.30
    合成處理圖像(10 m合成孔徑)P10.09–13.26–9.980.010–13.18–9.74
    P20.09–13.26–9.980.390–26.52–22.29
    P30.09–13.26–9.980.010–13.18–9.74
    合成處理理論值(10 m合成孔徑)P10.09–13.26–9.800.010–13.26–9.80
    P20.09–13.26–9.80 0.390–26.60–22.30
    P30.09–13.26–9.800.010–13.26–9.80
    合成處理圖像(15 m合成孔徑)P10.09–13.06–9.720.007–13.08–9.44
    P20.09–13.26–9.980.390–26.52–22.29
    P30.09–13.06–9.720.007–13.07–9.40
    合成處理理論值(15 m合成孔徑)P10.09–13.26–9.800.007–13.26–9.80
    P20.09–13.26–9.800.390–26.60–22.30
    P30.09–13.26–9.800.007–13.26–9.80
    下載: 導(dǎo)出CSV
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  • 收稿日期:  2019-08-13
  • 修回日期:  2020-02-23
  • 網(wǎng)絡(luò)出版日期:  2020-03-21
  • 刊出日期:  2020-08-18

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