Radio frequency time delay rapid measurement device based on chirp signal quadrature demodulation

A chirp signal and measurement device technology, applied in transmitter monitoring, transmission monitoring, electrical components, etc., can solve the problems of low measurement accuracy, complex test system, phase ambiguity, etc., and achieve simple system structure and strong anti-interference ability , the effect of rapid measurement

Active Publication Date: 2020-04-28
ZHEJIANG UNIV
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Problems solved by technology

In the traditional method, the test system is too complex due to the need for reference sig

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  • Radio frequency time delay rapid measurement device based on chirp signal quadrature demodulation
  • Radio frequency time delay rapid measurement device based on chirp signal quadrature demodulation
  • Radio frequency time delay rapid measurement device based on chirp signal quadrature demodulation

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Embodiment Construction

[0024] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Such as figure 1 As shown, the present invention is based on the chirp signal quadrature demodulation fast video delay measurement device, including chirp signal generator 1, device under test 2, analog-to-digital converter 3, processor 4, memory 5, wherein:

[0026] The processor 4 generates a series of frequency control words according to the initial frequency to be measured, the measurement bandwidth, and the number of frequency points, and outputs them to the chirp signal generator 1 in turn; the initial frequency, measurement bandwidth, and number of frequency points are determined by the specific measurement scene, and the frequency control word It is the actual measured frequency point, which increases from the initial frequency and evenly c...

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Abstract

The invention discloses a radio frequency time delay rapid measurement device based on chirp signal quadrature demodulation. The device comprises a chirp signal generator, a to-be-measured device, ananalog-to-digital converter, a processor and a memory; the chirp signal generator adopted by the device emits chirp signals with adjustable frequency ranges and adjustable chirp rates, so the rapid measurement of time delay in different frequency ranges is achieved, and the measurement range of the system is large; meanwhile, the time delay of the frequency converter is measured, and extra reference signals are not needed; the system structure is simple, and the anti-jamming capability is high; moreover, the method achieves the extraction of the time delay through the quadrature demodulation technology, avoids the phenomena of phase ambiguity and spectrum leakage in a conventional time delay detection process, and greatly improves the time delay detection precision.

Description

technical field [0001] The invention belongs to the technical field of radio frequency delay measurement, and in particular relates to a rapid radio frequency delay measurement device based on chirp signal quadrature demodulation. Background technique [0002] For any communication system, when a signal passes through a transmission network, the output signal inevitably produces certain distortion, including signal amplitude distortion and phase distortion, and the phase distortion directly determines the delay characteristics of the transmission network. In the 1930s, H. Nyquist and S. Brand of the United States published a paper on delay measurement in the "BSTJ" magazine. The article discussed the physical meaning and measurement method of group delay. [0003] With the rapid development of modern communications, people have more and more stringent requirements on the accuracy of time delay measurement. In the aerospace field, the time delay characteristics have a direct ...

Claims

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Application Information

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IPC IPC(8): H04B1/69H04B17/00H04B17/10
CPCH04B1/69H04B17/0085H04B2001/6912H04B17/101
Inventor 杜一杰金晓峰金向东王子立谢银芳
Owner ZHEJIANG UNIV
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