Parameter Estimation Method of UWB Signal Based on Photoelectric Composite

An ultra-wideband signal and photoelectric composite technology, which is applied in the field of signal processing parameters, can solve the problems of high signal recovery complexity and difficult application, and achieve the effect of reducing the calculation amount of parameter estimation and reducing the sampling rate

Active Publication Date: 2019-10-25
西安晟昕科技股份有限公司
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Problems solved by technology

Although this method has the advantages of both the optical domain and the electrical domain, it is an important way to study the parameter estimation of ultra-wideband signals, but the complexity of signal recovery is very high, and it is not easy to apply in actual engineering

Method used

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  • Parameter Estimation Method of UWB Signal Based on Photoelectric Composite
  • Parameter Estimation Method of UWB Signal Based on Photoelectric Composite
  • Parameter Estimation Method of UWB Signal Based on Photoelectric Composite

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Embodiment Construction

[0027] refer to figure 1 , the implementation steps of the present invention are as follows:

[0028] Step 1, stretching the ultrashort light pulse.

[0029] The principle of optical fiber stretching optical pulse is as follows:

[0030] Without considering the nonlinear effect and high-order dispersion, the frequency-domain general solution of optical pulse transmission in single-mode fiber is expressed as

[0031]

[0032] Among them, ω is the deviation of the angular frequency of the light wave relative to the angular frequency of the pulse center; z is the transmission distance of the optical pulse in the light; is the normalized light field amplitude The Fourier transform of; is the Fourier transform of the incident light at z=0; β 2 is the group velocity dispersion parameter of the fiber.

[0033] The time-domain general solution of the normalized amplitude of Gaussian light pulse light field is

[0034]

[0035] For a Gaussian optical pulse with no initi...

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Abstract

The invention discloses an ultra-wideband signal parameter estimation method based on optical-electrical combination and mainly solves the problem of high complexity of an optical-electrical combination ultra-wideband signal estimation electric field algorithm based on time-domain stretching and compressed sensing existing in the prior art. The method comprises the following implementation steps: realizing first compressed sampling of microwave electromagnetic signals in an optical domain through a time-domain stretching technique; then, carrying out second compression on the signals obtained after stretching by utilizing a compressed sampling technique to realize large compression ratio; and finally, carrying out quantification through an ADC, and carrying out direct estimation of signal parameters through the compression sensing technique having no recovery algorithm. The method reduces ADC sampling rate greatly, and can directly carry out signal parameter estimation under the condition where signal waveforms are not recovered, thereby greatly reducing parameter estimation operation amount of the compression sensing algorithm; and the method can be used for high-speed data acquisition and processing of radar and passive reconnaissance and the like.

Description

technical field [0001] The invention belongs to the technical field of signal processing parameters, and in particular relates to an ultra-wideband signal parameter estimation method, which can be used for high-speed data collection and processing such as radar and passive reconnaissance. Background technique [0002] Parameter estimation is one of the important research contents of modern signal processing, and has been widely concerned by scholars at home and abroad. In recent years, with the continuous development of electronic technology and the increasing demand for high-speed and large-bandwidth electronic equipment, parameter estimation of ultra-wideband signals has become a hotspot in parameter estimation research. [0003] At present, the research on UWB signal parameter estimation mainly has two aspects: signal parameter estimation based on compressed sensing and signal parameter estimation based on photoelectric composite. in: [0004] Scientists such as D.Donoh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/26
CPCG01S13/26
Inventor 秦国栋李鹏郭琦刘高高鲍丹蔡晶晶田巧妹武斌姜义
Owner 西安晟昕科技股份有限公司
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