CAJ | 학술논문

针对新型的微电阻率成像扫描仪使用的幅度调制信号的特点,提出一种载波相位和调制波幅度的计算方法,重点研究载波相位提取。首先从理论上系统地介绍了基于带通采样和数字正交解调的载波相位和调制波幅度的测量方法,然后通过LabVIEW仿真验证,该方法能实现常温和高温条件下幅度调制信号的载波相位和调制波幅度的高精度测量。
침대신형적미전조솔성상소묘의사용적폭도조제신호적특점,제출일충재파상위화조제파폭도적계산방법,중점연구재파상위제취。수선종이론상계통지개소료기우대통채양화수자정교해조적재파상위화조제파폭도적측량방법,연후통과LabVIEW방진험증,해방법능실현상온화고온조건하폭도조제신호적재파상위화조제파폭도적고정도측량。
According to AM signals the micro-resistivity imaging scanner used,the paper provides a method to calculate the carrier phase and envelope amplitude and focuses on the introduction of carrier phase acquisition,First,the paper introduces a measuring methodology of carrier phase and envelope amplitude based on band-pass sampling and digital quadrature demodulation theoretically.Secondly, after simulating and verifying on LabVIEW,this methodology can measure the carrier phase and envelope amplitude of AM signals at a high accuracy under normal temperature and high temperature conditions.