基于希尔伯特解调的LFM信号调频斜率的识别

Recognizing the Chirp Constant of LFM Based on Hilbert Demodulation[JZ)][HS)]

摘要:

脉冲调制信号调制参数的识别与计算是很多领域的研究重点,文中以希尔波特解调为基础,依据LFM信号相位信息的特点和最小二乘法的拟合,研究了一种全新的线性调频信号的识别算法,并分析了识别算法对载频不敏感的特点,并通过迭代算法以及自身的收敛特性,可快速解调出LFM信号的调制参数；通过各类仿真信号的解调分析,算法的正确性和有效性得到了验证；结合虚拟仪器技术,本算法在某雷达接收机线性调频信号的测试得到了工程应用,进一步验证了算法的有效性。

Abstract:

In many special researches, the estimation of the modulated parameters and the automatic analysis of Intra-pulse modulated characteristics are especially important. Based on Hilbert demodulation and the least-square method, a new recognizing algorithm of the Chirp constant of LFM is introduced. The specification of the carrier-frequency-insensitive is presented, by Iteration algorithm and the convergence property of itself, the modulated parameters is recognized. The correctness and validity of the algorithm is indicated by the actual radar signal and the computer simulation signal.