Spurious-free dynamic range improving method based on single sideband modulation

A single-sideband modulation, dynamic range technology, applied in the field of optical communication, can solve problems such as periodic power attenuation, achieve the effect of improving the suppression problem and improving the spurious-free dynamic range

Active Publication Date: 2020-11-06
AIR FORCE EARLY WARNING ACADEMY
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the present invention provides a method for improving spurious-free dynamic range based on single-sideband modulation, in order to overcome the IMD3 suppression problem in the ROF link in the prior art and avoid the periodic power caused during long-distance transmission Attenuation problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Spurious-free dynamic range improving method based on single sideband modulation
  • Spurious-free dynamic range improving method based on single sideband modulation
  • Spurious-free dynamic range improving method based on single sideband modulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] In order to make the objects and advantages of the present invention clearer, the present invention will be further described below in conjunction with the examples; it should be understood that the specific examples described here are only for explaining the present invention, and are not intended to limit the present invention.

[0039] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.

[0040] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "inner", "outer" and other indicated directions or positional relationships are based on the terms shown in the accompanying drawings. The direction or positional relationship shown is ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a spurious-free dynamic range improvement method based on single sideband modulation. The spurious-free dynamic range improvement method comprises the following steps that: step 1, a laser device emits an optical carrier S1; step 2, a radio frequency input signal S2 modulates an optical signal S1 output by a laser through using a phase modulator so as to obtain and outputa phase modulation signal S3; step 3, the phase modulation signal S3 passes through a third-order intermodulation distortion suppressor, and then a single-sideband phase modulation signal S4 with a certain carrier-to-sideband ratio is output; and step 4, a photoelectric detector demodulates the signal S4 to suppress third-order intermodulation distortion in a output radio frequency signal S5, andan output signal of the photoelectric detector is input into a frequency spectrograph to be analyzed. The third-order intermodulation distortion suppressor obtains the single-sideband signal with a certain ratio of an optical carrier to +2-order sideband amplitude after carrying out amplitude-frequency processing on the signal, and the signal is extracted by the photoelectric detector in the step4, so that a spurious-free dynamic range of a spurious-free dynamic range link is improved.

Description

technical field [0001] The invention relates to the field of optical communication and the technical field of microwave photons, in particular to a method for improving the spurious-free dynamic range based on single-sideband modulation. Background technique [0002] Microwave photonics technology, MWP, Microwave Photonics, uses optical technology to transmit, process and apply microwave signals, combining the advantages of microwave technology fineness and photon technology broadband, in satellite communications, radio and television, optically controlled phased array antennas and navigation, etc. It has been widely used in many military and civilian fields. Radio-over-fiber system, ROF: radio-over-fiber, is one of the important applications of microwave photonic technology, usually composed of central office, optical fiber link and remote antenna unit. ROF modulates radio frequency signals onto optical signals and transmits them through optical fibers, and finally demodul...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/516H04B10/548
CPCH04B10/503H04B10/5165H04B10/548
Inventor 张进沃江海王安乐张钧凯李翔
Owner AIR FORCE EARLY WARNING ACADEMY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products