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文章详细介绍了无源无线轮胎压力监测系统中的声表面波传感器工作原理、回波信号组成、数字信号处理和软件开发方法；
The paper introduce the theory of surface acoustic wave sensor, the digital signal treatment, the method of soft design in the passive and wireless tire pressure monitoring system in detail.
文章针对激光弱小回波信号的低信噪比，提出了运用数字信号处理技术对回波信号进行处理的方法，并进行了一系列仿真和计算。
In the paper the methods to process weak echo by using DSP technology based on low SNR of laser weak echo are presented. And the methods are simulated and calculated.
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