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为更好的提高轨道交通信号的可靠性和稳定性,结合轨道交通信号模型提出一种改进的HHT的信号调节算法。文章首先结合ZPW2000信号的特点,构建ZPW2000信号的数学模型;其次,针对传统的信号调节方法比较适合信噪比较高的场景的问题,对传统的信号调节方法进行改进,提出一种基于HHT的改进算法。利用第一个固有模态函数对信号轨道信号的上下边频和频率进行调解;最后,根据上述的方案,引入低信噪比和高信噪比对调解效果进行对比,验证了上述算法的正确性和可行性。
In order to improve the reliability and stability of the rail transit signal better, an improved HHT signal conditioning algorithm is proposed based on the rail transit signal model. Firstly, the paper builds the mathematic model of ZPW2000 signal based on the characteristics of ZPW2000 signal. Secondly, aiming at the problem that the traditional signal adjustment method is more suitable for the scene with higher SNR, the traditional signal conditioning method is improved. improve algorithm. Using the first intrinsic mode function to reconcile the upper and lower side frequency and frequency of the signal orbit signal. Finally, according to the above scheme, the low signal-to-noise ratio and high signal-to-noise ratio are introduced to compare the mediating effect, which verifies the correctness of the above algorithm Sexuality and feasibility.