数字正交检波技术在无线声表面波传感器系统中应用  

The Application of Digital Quadrature Demodulation in Wireless SAW Sensor Systems

作　　者：吴嘉慧[1] 韩韬[1] 施文康[1] 

机构地区：[1]上海交通大学

出　　处：《电子测量技术》2002年第2期21-22,共2页Electronic Measurement Technology

摘　　要：文中提出用数字式正交检波技术来测量相位的方法。通过对声表面波的回波窄带信号进行仿真计算和误差分析,表明采用的方法性能良好,与已有硬件实现的正交检波器相比,测量精度大大提高。并分析数字正交检波方法的实现中,ADC对结果的影响。A method of digital quadrature demodulation is presented in this paper. The method shows more excellent performance by simulation and error analysis for the narrow - band reflected signal by SAW sensor. Compared with the existing quadrature detector traditionally realized by hardware, the measured accuracy is promoted greatly. Besides, the influence of ADC is also analyzed to the digital quadrature detector.

关 键 词：数字正交检波 声表面波 无线传感器 正交检波 计算机仿真 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]