基于混沌序列的良好相关性和随机性以及双混沌序列的复杂性，在子脉冲内部采用具有抗干扰高斯噪声的Bernouli 单混沌映射来进行连续频率调制，同时在子脉冲之间采用双混沌映射、Logistic 映射、Tent 映射进行相位调制. 为了便于分析信号模型，首先对信号模型进行离散化，并推导了详细的表达式；进一步对信号频谱、模糊特性，以及信号的正交性进行理论推导和分析；最后对信号波形进行方法设计和数值仿真. 结果表明，该信号模型具有很好的正交性和可靠性.
Based on good correlation and randomness of chaotic sequences, and complexity of double chaotic sequences, this paper proposes a MIMO radar signal model. Inside a sub-pulse, continuous frequency modulation is used with a single Bernouli chaotic map, which can resist interference of Gaussian noise. Between sub-pulses, phase modulation is used with double chaos map, i.e., Logistic and Tent. To analyze the signal model, the signal’s expression is discretized and deduced in detail. The expressions of average ambiguity function and frequency spectrum are derived. Average fuzzy characteristics and orthogonality of the signal waveforms are analyzed in theory. Numerical simulation shows the signal model with good orthogonality and reliability In this paper.
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