基于相位編碼的稀布陣綜合脈沖孔徑雷達的脈沖壓縮性能分析
PERFORMANCE ANALYSIS OF PULSE COMPRESSION USING PHASE-CODED SIGNALS FOR SPARSE-ARRAY SYNTHETIC IMPULSE AND APERTURE RADAR
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摘要: 稀布陣綜合脈沖孔徑雷達(SIAR)采用多個頻率信號同步全向照射工作方式,通過脈沖綜合可以獲得一定的脈壓比。根據(jù)其距離模糊函數(shù)知,距離分辨率僅取決于發(fā)射信號帶寬,增大發(fā)射信號的時寬帶寬積則存在距離柵瓣效應(yīng)。為此本文利用相位編碼調(diào)制各陣元的發(fā)射信號,討論其脈沖壓縮性能。結(jié)果表明:這時不僅可以大大提高脈壓比,而且可以降低距離旁瓣,同時可以滿足SIAR對各向同性照射的要求。從而有利于提高其作用距離和距離分辨能力.
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關(guān)鍵詞:
- 稀布陣; 綜合脈沖孔徑雷達; 脈沖壓縮; 相位編碼
Abstract: Sparse-array Synthetic Impulse and Aperture Radar (SIAR) can isotropically radiate by employing multiple frequencies (synthetic pulse) and multiple antennas (synthetic antenna). The range resolution only depends on bandwidth of transmitting signals. The distance grating lobes emerge in the case of increasing time-bandwidth product of transmitting signals. The performance of pulse compression is analyzed with the transmitting signals modulated by phase-coded sequences. The great ratio of pulse compression and range sidelobe suppression in SIAR are obtained, and its effective range and range resolution are raised. -
Dorey J, Garnier G, Auvray G. RIAS, synthetic impulse and antenna radar. International Conference on Radar, Paris: 1989, 556-562.[2]保錚,張慶文.一種新型的米波雷達--綜合脈沖與孔徑雷達.現(xiàn)代雷達,1995, 17(1): 1-13.[3][3][4]張慶文,保錚.綜合脈沖與孔徑雷達時空三維匹配濾波及性能分析.電子科學(xué)學(xué)刊,1994, 16(5): 481-489.[5]林茂庸,柯有安.雷達信號理論.北京:國防工業(yè)出版社,1984,第七章.[6]陳伯孝.SIAR四維跟蹤及其長相干積累等技術(shù)研究:[博士論文].西安:西安電子科技大學(xué),1997.8. -
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