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Phase coded signal generating device and method based on DP-QPSK modulator and PM series connection

A DP-QPSK, phase-encoded signal technology, applied in the field of phase-encoded signal generation devices, can solve problems such as increasing system complexity, and achieve the effects of compact structure, wide operating frequency range, and high autocorrelation PSR

Active Publication Date: 2021-07-13
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Phase-encoded microwave pulse signals usually have frequency components at baseband, which can be removed using a high-pass filter, but this increases the complexity of the system

Method used

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  • Phase coded signal generating device and method based on DP-QPSK modulator and PM series connection
  • Phase coded signal generating device and method based on DP-QPSK modulator and PM series connection
  • Phase coded signal generating device and method based on DP-QPSK modulator and PM series connection

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Embodiment

[0094] like figure 1 As shown, the present invention, based on a phase-encoded signal generating device in which a DP-QPSK modulator and a PM are connected in series, comprises a light source 11, a signal modulation unit 12, an optical polarizer 13 and a photodetector 14 connected in a sequential optical path;

[0095] The light source is used to generate and output an optical carrier; the light source may be a laser light source, which generates a single-wavelength continuous laser light as an optical carrier; the optical carrier is linearly polarized light.

[0096] The signal modulation unit 12 is used to receive the optical carrier, the single-tone microwave signal and the encoded signal of the arbitrary waveform generator to form the first, second and third optical signals, and the encoded signal of the arbitrary waveform generator is modulated by the PM in series to On the third optical signal, the optical signal output by the PM will be used as the output of the signal ...

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Abstract

The invention discloses a phase coding signal generating device and method based on DP-QPSK modulator and PM series connection. The device comprises a light source, a signal modulation unit, a light polarizer and a photoelectric detector which are sequentially connected through a light path. The light source is used for generating and outputting optical carriers; the signal modulation unit is used for receiving an optical carrier, a single-tone microwave signal and a coded signal of the arbitrary waveform generator to form a first optical signal, a second optical signal and a third optical signal, and outputting a fourth optical signal; the optical polarizer is used for receiving the fourth optical signal output by the signal modulation unit and performing polarization processing on the fourth optical signal to form a fifth optical signal; and the photoelectric detector is used for converting the fifth optical signal after polarization processing into an electric signal. The device disclosed by the invention can generate all-optical two-phase coded microwave pulse signals with adjustable carrier frequency and no baseband component, and is compact in structure and wide in working frequency range.

Description

technical field [0001] The invention belongs to the technical field of signal generation, and in particular relates to a phase encoding signal generation device and method based on a DP-QPSK modulator and a PM connected in series. Background technique [0002] Phase-encoded signals are widely used for pulse compression to improve radar range resolution. With the rapid development of radar systems, new requirements such as high operating frequency, wide bandwidth, and high reconfigurability are put forward for phase-encoded signals. Such requirements are difficult or even impossible to achieve using conventional electronic methods. Microwave photonics offers a solution to overcome this limitation. Furthermore, signal processors implemented using microwave photonic technology are immune to electromagnetic interference and have parallel and multiprocessing capabilities. [0003] In photonics phase-encoded signal generators, the limited number of sequences of phase-encoded si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/556
CPCH04B10/5051H04B10/5561
Inventor 王旭东陈敬旭陈凯荣冯新焕姚建平张杰君曹元王琳吴幸雷刘文兵张军胡阳
Owner JINAN UNIVERSITY
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