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Comprehensive DME pulse interference restraining method

A pulse interference and interference suppression technology, which is applied in the field of comprehensive DME pulse interference suppression, can solve problems such as performance degradation

Inactive Publication Date: 2015-01-28
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

Although the above-mentioned methods have good performance when the pulse interference signal density is low, the performance of these methods is seriously degraded with the increase of the pulse interference signal density, so it is necessary to study a DME pulse interference suppression method with better performance

Method used

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  • Comprehensive DME pulse interference restraining method
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Embodiment Construction

[0023] The comprehensive DME pulse interference suppression method provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] A baseband DME signal consists of Gaussian pulse pairs, which can be expressed as:

[0025] s ( t ) = e - α 2 t 2 + e - α 2 ( t - Δt ) 2 - - - ( 1 )

[0026] Among them, α=4.5×10 11 the s -2 , the value of α c...

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Abstract

The invention relates to a comprehensive DME pulse interference restraining method. The comprehensive DME pulse interference restraining method includes the steps of inputting signals received by a receiver, and calculating the interference duty ratio of the input signals; if the interference duty ratio of the input signals is smaller than a threshold value gamma, conducting DME pulse interference restraining with the time-frequency mixed filtering method; if the interference duty ratio of the input signals is larger than the threshold value gamma, conducting DME pulse interference restraining with the parameter estimation and wavelet packet conversion jointed method. The comprehensive DME pulse interference restraining method has the advantages that the method is combined with a traditional DME pulse interference restraining method and the parameter estimation and wavelet packet conversion jointed method, the suitable method can be adaptively selected for conducting interference restraining according to interference occasions with different pulse interference duty ratios, the calculation complexity of the interference restraining performance and interference restraining algorithms is comprehensively considered, and the method has a certain practical value.

Description

technical field [0001] The invention belongs to the technical field of pulse interference suppression, in particular to a comprehensive DME pulse interference suppression method. Background technique [0002] GPS L5 signal, Galileo E5 signal and Beidou B2 signal are all important components of the future Global Navigation Satellite System (GNSS), which will be used in conjunction with other satellite signals for Safety of Life (SoL) services It will have broad application prospects in the field of civil aviation. However, during the construction and development of GNSS, there will be electromagnetic compatibility problems with existing aeronautical radio equipment, such as the working frequency band of GPS L5, Galileo E5 and Beidou B2 signals and Aeronautical Radio Navigation Services (ARNS) The frequency bands overlap, and the ARNS frequency band has been occupied by many systems. Therefore, in these systems, the high-power pulse signal transmitted by the distance measurin...

Claims

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Application Information

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IPC IPC(8): G01S19/21
CPCG01S19/21
Inventor 吴仁彪李流丽王文益卢丹王璐
Owner CIVIL AVIATION UNIV OF CHINA
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