双谱用于毫米波雷达目标特征提取的研究
A STUDY OF FEATURE EXTRACTION FOR mmW RADAR BY USING BISPECTRUM TECHNOLOGY
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摘要: 在毫米波雷达系统中,信噪比对作用距离的影响很大。本文利用双谱技术提取出目标信号双谱的局部相位信息作为特征矢量;该特征良好的抗噪性大大降低了目标识别对雷达系统信噪比的要求,从而提高了毫米波雷达的灵敏度及作用距离。Abstract: In mmW radar system, SNR affect heavily on radar range. To lower the SNR demand of target recognition, a new approach of feature extraction based on the bispectrum technique is presented. The feature vectors defined from bispectrum have high stability even when SNR is very low. Thus, the sensitivity and range of mmW radar are improved.
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李兴国.毫米波近感技术及其应用.北京:国防工业出版社,1991, 57-69.[2]Chandran V. Pattern recognition using invariants defined from higher order spectra-one-dimensional inputs. IEEE Trans. on Signal Processing, 1993, SP-41(1): 205-211.[3]Walton E K. Bispectrum of radar signatures and application to target classification[J].Radio Science.1990, 25(2):101-113[4]王宏禹.现代谱估计.南京:东南大学出版社,1990,304-367.[5]文树梁.基于双距离象的雷达目标识别技术.现代雷达,1996,18(1): 15-21.[6]Oppenheim A V. The importance of phase in signals[J].Proc. IEEE.1981, 69(5):529-541 -
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