相位干涉仪的一种数字接收机方案

相位干涉仪的相位测量精度受到带内噪声和接收机体制的影响。模拟接收机的测相精度一般可以达到几度,受模拟器件的影响,进一步提高测相精度非常困难。提出了一种数字接收机方案,采用单比特接收机实现宽带、高灵敏度测频;采用窄带数字接收机实现高的相位测量精度。仿真结果表明:本方案切实可行,并可解决高灵敏度检测以及高测角精度问题。

A Digital Receiver Scheme for Phase Interferometer

The accuracy of phase measurement of phase interferometer is effected by noise level and the certain type of receiver.The accuracy of analogue-type receiver could be several degrees.It's difficult to improve the accuracy of phase measurement furthermore due to the inherent characteristics of analogue devices.In this article,a digital receiver scheme is provided.On one hand,the monobit receiver is utilized to achieving frequency measurement with wide band and high sensitivity.On the other hand,narrow band digital receiver is used to achieving high accuracy of phase measurement.Simulation result shows: The digital scheme is practical,and high receiving sensitivity can be achieved as well as high accuracy of angel measurement.