基于LabVIEW的数字相敏检波器实现  

Implementation of digital phase sensitivity detector base on LabVIEW

作　　者：张家田[1] 周超[1] 严正国[1] 

机构地区：[1]西安石油大学光电油气测井与检测教育部重点实验室,陕西西安710065

出　　处：《现代电子技术》2012年第16期143-145,共3页Modern Electronics Technique

基　　金：国家重大专项(2011ZX05020-004-05);西安石油大学研究生创新基金(2011cx100312)

摘　　要：根据数字相敏检波的原理,在LabVIEW环境实现了数字相敏检波算法,并分析了算法性能。实验结果表明,整周期采样时,信噪比低至-20dB时的幅度误差小于0.2%,相位误差小于0.7%。为进一步验证,还利用NI公司的波形生成卡和数据采集卡模拟了数字相敏检波在实际中的应用效果。According to the principle of digital phase sensitive detection,the phase sensitive detection algorithm is implemented in Labview environment and the algorithm performance is analyzed.The experiment shows that in the condition of full period sampling,when the signal-to-noise ratio is lowered to-20 dB,the amplitude error is less than 0.2% and the phase error is less than 0.7%.For further verification,the waveform generation card and data sampling card of NI（National Instruments） Company were used to simulate the real application in the phase sensitive detection.

关 键 词：数字相敏检波 LABVIEW 算法性能 整周期采样 

分 类 号：TN911-34[电子电信—通信与信息系统] TP311[电子电信—信息与通信工程]