一种基于数字鉴相原理的高精度无线测距系统设计  

Design of High Precision Wireless Ranging System Based on Digital Discrimination Principle

作　　者：李辉[1] 王岩飞[1] 李炯[1] 

机构地区：[1]中国科学院电子学研究所

出　　处：《电子器件》2008年第2期582-585,共4页Chinese Journal of Electron Devices

摘　　要：对目标的距离进行精确地测量是导航、测控等领域必须有效解决的重要问题。利用基于FFT的数字鉴相方法和自乘倍相原理设计了一种应答式侧音测距系统。实验结果表明该设计方案的测距精度优于5cm,充分体现了侧音测距精度高以及数字鉴相能在较低信噪比下准确地估计相位的优点;同时连续波系统的收发隔离问题也得到了有效的解决。The accuracy target distance measurement is a crucial problem which must be solved effectively in the domains of navigation, ranging and so on. A responsive multiple frequency ranging system is designed by utilizing digital phase discrimination, based on FFT, and phase double principle. The experimental results prove the ranging precision of this design scheme excels 5 cm, which embodies the high precision of multiple frequency ranging. Additionally, the advantage of exact phase estimation using digital phase discrimination under low SNR is shown fully. The insulation problem of the transceiver in CW systems is resolved effectively at the same time.

关 键 词：侧音测距 自乘倍相 数字鉴相 收发隔离 

分 类 号：TN953[电子电信—信号与信息处理]