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Interference prediction based self-adaptive wave trap method

An adaptive notch and adaptive filtering technology, which is applied to measurement devices, radio wave measurement systems, satellite radio beacon positioning systems, etc., to achieve good real-time performance, is conducive to miniaturization, and suppresses the effects of positioning performance.

Inactive Publication Date: 2016-09-07
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The suppression method proposed by the present invention solves some problems existing in the existing methods in terms of complexity or performance, is a good supplement to the existing methods, and provides a new means for satellite navigation receivers to resist interference

Method used

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  • Interference prediction based self-adaptive wave trap method
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  • Interference prediction based self-adaptive wave trap method

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Embodiment Construction

[0021] The method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] figure 1 It is a schematic diagram of the adaptive notching process based on interference prediction of the present invention, an adaptive notching method based on interference prediction, which uses the previous signal as a reference signal to predict the current interference, and adaptively adjusts the zero point position and Notch filter amplitude, so that the interference can be effectively suppressed. Specifically include the following steps:

[0023] (1) down-converting the received navigation signal into a baseband signal, sampling the baseband signal to obtain a digital signal, and performing bandpass filtering on the digital signal;

[0024] (2) Divide the filtered signal into the same two channels, delay one of the signals as a reference signal, perform adaptive filtering on the reference signal according to the minimum mean square er...

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Abstract

The invention discloses an interference prediction based self-adaptive wave trap method, and relates to the field of pseudo satellite navigation. A received satellite navigation signal with interference is delayed appropriately to form a reference signal, and thus, available navigation is extracted from narrowband interference. The zero point position and amplitude of a trap filter are adjusted adaptively to inhibit interference effectively. According to the method, the structure is simple, the computing amount is low, and the capability of resisting narrowband interference of a satellite navigation receiver is improved.

Description

technical field [0001] The invention relates to the field of pseudolite navigation, in particular to the field of narrow-band interference suppression of satellite navigation receiver terminals, and uses an adaptive prediction method to realize the suppression and elimination of narrow-band interference in a satellite navigation receiving system. Background technique [0002] Facing the increasingly complex electromagnetic environment, how to realize the stable and continuous operation of the satellite navigation receiving terminal under the influence of narrowband interference must solve the problem of the influence of narrowband interference on the satellite navigation receiving terminal. Scholars at home and abroad have also proposed several interference suppression methods to solve the impact of narrowband interference on the navigation system, such as time domain filtering technology, frequency domain filtering technology, etc. The frequency domain filtering technology t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/21H04B1/71
CPCG01S19/215H04B1/71
Inventor 范广伟蔚保国段召亮王振华杨开伟
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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