Double-channel digital phase noise detection device and phase noise detection method

Abstract

The invention relates to a double-channel digital phase noise detection device and a phase noise detection method. An input sinusoidal signal from 1 to 100MHz is subjected to work distribution and phase shift, then double-channel quadrature sampling and digital signal processing technologies are utilized to extract phase noise in real time, so that the problem that the Fourier frequency is required to be corrected and calibrated and subjected to other testing links in the traditional measurement method is solved, an orthogonal reference source with the same frequency as a source to be tested is not required, and through utilizing a fixed reference source, the phase difference between the source to be tested and the reference source can be accurately measured in real time.

Description

technical field

[0001] The invention relates to a noise detection device, in particular to a dual-channel digitized phase noise measurement device and a phase noise detection method, which are applied to phase noise testing fields such as navigation and positioning, radar systems, etc., which have high requirements on oscillation sources. Background technique

[0002] At present, the phase noise measurement devices on the market mainly include the imported HP3047A, HP3048A, E5500 series and PN9000, etc. These measurement devices are mainly based on analog technology, and their components mainly include phase detectors, phase-locked loops, low-noise amplifiers, data acquisition and computer.

[0003] Phase noise is very important to the performance of communication systems or radar systems. It limits the accuracy of navigation and positioning, reduces the range of radar, and reduces the quality of data transmission in communication systems. Therefore, integrating an oscillati...

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