Self-adaption rapid narrow-band interference suppression device

A narrowband interference and interference suppression technology, applied in the field of spread spectrum communication, can solve the problems of complex implementation and high cost, and achieve the effects of reducing detection time, adaptive tracking and suppressing narrowband interference, and reducing hardware computing resource consumption

Active Publication Date: 2014-05-21
杭州中科微电子有限公司
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Problems solved by technology

The disadvantage is that the implementation is complicated, the cost is high, and there is no ability to adaptively track the frequency change of interference

Method used

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  • Self-adaption rapid narrow-band interference suppression device
  • Self-adaption rapid narrow-band interference suppression device
  • Self-adaption rapid narrow-band interference suppression device

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0046] figure 1 Shown is the structure of a navigation satellite positioning receiver 107 with narrowband interference rejection. The satellite 101 of the global navigation satellite system (such as GPS system, GLONASS system, Galileo system, Beidou system or other global navigation satellite systems) and the narrowband interference signal 102 are received by the receiver antenna 103 and transmitted to the receiver radio frequency 104 for mixing and filtering , quantization and other operations to generate intermediate frequency digital signals. A receiver without narrowband interference suppression capability directly transmits the intermediate frequency digital signal to the receiver baseband 106 for processing. When the interference signal 102 exists, this will cause the baseband 106 of the receiver to process the satellite signal normally, and the...

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Abstract

Disclosed is a self-adaptive quick narrowband interference suppression device. The device comprises one or more DFT modules, an interference suppression module, an interference acquisition control module, and an interference tracking control module. The device completes the steps of: firstly, acquiring a narrowband interference signal, wherein the interference acquisition control module uses a multistage DFT frequency detection algorithm to control the DFT module to subject an input signal to narrowband interference frequency detection; after detecting the narrowband interference, initializing and starting up the interference suppression module to filter a plurality of narrowband interferences; and then tracking the narrowband interference signal by using the interference tracking control module to control the DFT module to subject the detected narrowband interference frequency to detection tracking and updating the coefficient of an IIR wave trap in the interference suppression module, thereby conducting self-adaptive tracking and suppression of the narrowband interference. The present invention can quickly detect a plurality of narrowband interferences and continuously track the interference frequency variation, and has the advantages that the implementation cost is low, the detection is quick, and the self-adaptive tracking of the frequency variation of the narrowband interference can be conducted.

Description

technical field [0001] The invention belongs to the field of spread spectrum communication, and in particular relates to an adaptive fast narrow-band interference suppression device. Background technique [0002] Global Navigation Satellite System (GNSS) provides users with positioning and navigation services, and has been widely used in consumer, transportation, electric power, national defense and other fields. GNSS includes the United States' Global Positioning System (GPS), Russia's GLONASS system, the European Union's Galileo system (Galileo), China's Beidou system (BD), and several other augmentation systems. [0003] The GNSS signal strength received on the ground is around -130dBm, well below the noise power. Interference from other communication devices leaking into the GNSS signal frequency band can seriously degrade the performance of the receiver or even render it inoperable. The most common type of interference is continuous wave interference (Continue Wave In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/71H04L25/03
CPCH04B1/7102
Inventor 蔺晓龙翟昆朋何文涛金亮良李尤徐建华殷明
Owner 杭州中科微电子有限公司
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