混沌相位调制雷达信号的模糊函数
AMBIGUITY FUNCTION OF CHAOTIC PHASE MODULATED RADAR SIGNALS
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摘要: 本文研究了一类混沌编码信号,利用混沌信号进行雷达信号的相位编码,并且计算了这类编码信号的模糊函数。理论和仿真结果表明,混沌编码信号的模糊函数十分逼近理想的图钉型,信号具有很高的时延和多普勒分辨力,揭示了混沌用于雷达信号处理的可能性和优越性。
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关键词:
- 混沌; 模糊函数; 相位编码
Abstract: This paper analyzes a kind of chaotic modulation signals,the phase-modulated radar signals are generated by chaotic signals,at the same time the ambiguity function of the coded signals is given.Theory and simulation results show that the ambiguity function of chaotic modulated signals is approximatly thumbtack-shapeas the ideal results,thus the signal has high resolution both in time-delay domain and Doppler frequency domain.It implies the possibility and advantages for chaos to be used in radar signal processing. -
Leung H Applying chaos to radar detection in an ocean cnvironment：An experimental study.IEEE J[J].Oceanic Engineering.1995,20(1):56-64[2]Haykin S,et al Derection of signals in chaos Proc IEEE,1995，83(1)：94-122.[3]Schuster H G Deterministic Chaos,An Introduction(Second Revised Edition)．Federal Republic of Germany,VCH，1988,ch2[4]Chua L O，et al Generating randomness from chaos and constructing chaos with desired ran domness．Int．J Circuit and Applications,1990，18(3)：215-240．[5]林茂庸，等，雷达信号理论．北京：国防工业出版社，1984，第七章. -
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