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Microwave photon frequency measuring device based on technologies of compressed sampling and time domain broadening and method thereof

A technology of time-domain broadening and microwave photonics, which is applied in electromagnetic wave transmission systems, electrical components, transmission systems, etc., can solve problems such as the limitation of random bit sequences, and achieve the requirements of improving the applicable range, realizing spectrum reconstruction, and reducing implementation Effect

Inactive Publication Date: 2013-02-13
ZHEJIANG UNIV
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Problems solved by technology

Although these techniques greatly reduce the sampling frequency of the electronic analog-to-digital converters in the system, the required random bit sequence is still limited by the Nyquist sampling law

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  • Microwave photon frequency measuring device based on technologies of compressed sampling and time domain broadening and method thereof
  • Microwave photon frequency measuring device based on technologies of compressed sampling and time domain broadening and method thereof

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with accompanying drawing:

[0014] as attached figure 1 , 2 As shown, the microwave photon frequency measurement device based on compressed sampling and time domain widening technology includes a microwave signal to be measured 13, an observation matrix module 14, an observation signal 15, a digital signal processing module 16, and a signal output port 17; the microwave signal to be measured 13 is passed The observation matrix module 14 generates the observation signal 15 and then outputs the signal output port 17 through the digital signal processing module 16; the observation matrix module 14 includes a supercontinuum light source 1, a first dispersion medium 2, a first Mach-Zehnder modulator 3, a second Dispersion medium 4, second Mach-Zehnder modulator 5, high-speed photodetector 6, low-pass filter 7, electronic analog-to-digital converter 8, radio frequency input port 9 of the first Mach-Zehnder...

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Abstract

The invention discloses a microwave photon frequency measuring device based on technologies of compressed sampling and time domain broadening and a method thereof. A super-continuum spectrum optical source is broadened in time domain through a dispersive medium to achieve mapping from frequency to time. Microwave signals to be measured are modulated through a Mach del modulator on a carrier wave broadened in time domain. Modulated optical signals are further broadened through the dispersive medium so that the frequency of the microwave signals to be measured is reduced. A random bit sequence with +-1 is modulated on the broadened optical signals through the Mach del modulator, and observation data with information of the signals to be measured are obtained through photovoltaic conversion, a low pass filter and an electronic analogue-to-digital converter. The frequency spectrum of the original signals can be recovered through an existing compressed sampling recovery arithmetic. In an existing frequency technology based on the compressed sampling, the original signals are required to be modulated on a random bit sequence reaching Qwest frequency. The microwave photon frequency measuring device can reduce required frequency of the random bit sequence, and at the same time further reduces sampling frequency of the analogue-to-digital converter in the system so as to improver feasibility of the system.

Description

technical field [0001] The invention relates to the field of optical communication and wireless communication, in particular to a microwave photon frequency measuring device and method based on compressed sampling and time domain widening technology. Background technique [0002] In recent years, due to the important application value of signal carrier frequency measurement technology in military reconnaissance systems, microwave signal frequency measurement technology has received extensive attention and in-depth research by researchers from various countries. Traditional electronic frequency measurement technology is limited in terms of bandwidth, resolution, dynamic range and stability, while microwave photon frequency measurement technology has the advantages of large bandwidth, light weight, low loss and anti-electromagnetic interference. A research hotspot in the field of technology. In the microwave photon frequency measurement technology, there are multi-frequency a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/516H04B1/00
Inventor 陈莹池灏章献民金晓峰郑史烈
Owner ZHEJIANG UNIV
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