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High-frequency anti-aliasing band-pass dimmable analog-to-digital conversion device

An analog-to-digital conversion and anti-aliasing technology, applied in optical analog/digital converters, optics, instruments, etc., to achieve the effect of convenient storage and processing and breaking through bandwidth limitations

Pending Publication Date: 2021-09-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the existing microwave photon signal processing and optical analog-to-digital conversion research, there is no optical analog-to-digital conversion scheme that combines the two efficiently to achieve band-pass adjustable frequency response

Method used

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  • High-frequency anti-aliasing band-pass dimmable analog-to-digital conversion device
  • High-frequency anti-aliasing band-pass dimmable analog-to-digital conversion device
  • High-frequency anti-aliasing band-pass dimmable analog-to-digital conversion device

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Embodiment 1

[0027] The system block diagram of this embodiment is as follows figure 2 As shown, the high-frequency anti-aliasing bandpass adjustable optical analog-to-digital conversion device of the present invention includes: an orthogonal optical signal generation module 1, an electro-optical intensity modulation module 2, an orthogonal demultiplexing module 3, a photoelectric conversion module 4, an electrical A filter module 5 , an electrical analog-to-digital conversion module 6 , a digital signal processing unit 7 , and a frequency setting and synchronization module 8 .

[0028] The orthogonal optical signal generation module 1 is composed of a dual-wavelength light source 1-1, a wavelength division multiplexer 1-2, an adjustable optical delay line 1-3 and a wavelength division multiplexer 1-4. The dual-wavelength light source 1-1 is a modulated laser with two wavelengths, the wavelength division multiplexer 1-2 is an arrayed waveguide grating, and the wavelength division multiple...

Embodiment 2

[0037] The system block diagram of this embodiment is as follows Figure 4As shown, it is a microwave photon channelization filtering and orthogonal sampling receiving scheme proposed on the basis of the high-frequency anti-aliasing bandpass adjustable optical analog-to-digital conversion of the present invention, including: parallel orthogonal optical signal generation module 1, electro-optic Intensity modulation module 2 , orthogonal demultiplexing module 3 , photoelectric conversion module 4 , electrical filter module 5 , electrical analog-to-digital conversion module 6 , digital signal processing unit 7 , and frequency setting and synchronization module 8 .

[0038] The parallel orthogonal optical signal generation module 1 is composed of a multi-wavelength light source 1-1, a first wave division multiplexer 1-2, an electro-optic modulator 1-3, a second wave division multiplexer 1-4, a phase shifter 1-5 and wavelength division multiplexer 1-6, the multi-wavelength light so...

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Abstract

A high-frequency anti-aliasing band-pass optical analog-to-digital conversion device comprises an orthogonal optical signal generation module, an electro-optical intensity modulation module, an orthogonal demultiplexing module, a photoelectric conversion module, an electrical filtering module, an electrical analog-to-digital conversion module, a digital signal processing unit and a frequency setting and synchronizing module. Band-pass filtering and aliasing-free digitization of signals can be achieved at the same time, the passband bandwidth is not limited by devices such as an optical filter, and the passband bandwidth and the center frequency are flexibly configured by adjusting the filter bandwidth in the electric filtering module and the setting frequency of the frequency setting and synchronization module.

Description

technical field [0001] The invention relates to microwave signal anti-aliasing band-pass sampling, in particular to a high-frequency anti-aliasing band-pass adjustable optical analog-to-digital conversion device. Background technique [0002] With the development of information technology, the application of high-frequency signals is becoming more and more extensive, which puts forward very high requirements for the receiving bandwidth and sampling rate of the analog-to-digital converter. Traditional electrical analog-to-digital converters have been difficult to meet the current needs due to their huge high-frequency loss. The optical analog-to-digital converter can effectively solve the bandwidth problem by using the large bandwidth of photonic technology, which is considered to be the development direction of the future analog-to-digital converter. At the same time, the method of down-converting the signal and obtaining all its information through band-pass sampling can e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F7/00
CPCG02F7/00
Inventor 吴龟灵王思同王城陈建平
Owner SHANGHAI JIAO TONG UNIV
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