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 problems such as high cost and complex implementation, and achieve the effects of reducing detection time, adaptive tracking and suppressing narrowband interference, and reducing hardware computing resource consumption.

Active Publication Date: 2012-11-07
杭州中科微电子有限公司
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  • Abstract
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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

The invention discloses a self-adaption rapid narrow-band interference suppression device, which comprises one or more DFT (discrete fourier transformation) modules, an interference suppression module, an interference capturing control module and an interference tracking control module. Firstly, a narrow-band interference signal is captured by the steps of: controlling the DFT module to carry out narrow-band interference frequency detection on an input signal through the interference capturing control module by employing a multi-stage DFT frequency detection algorithm, initializing and starting the interference suppression module to filter a plurality of narrow-band interferences after the narrow-band interferences are detected; and then, the narrow-band interference signal is tracked by the steps of: utilizing the interference tracking control module to control the DFT module to carry out detection tracking on the detected narrow-band interference frequency, and updating a coefficient of an IIR (intermodulation intercept point) wave trap in the interference suppression module, so as to carry out self-adaption tracking and suppression to the narrow-band interferences. According to the invention, the plurality of narrow-band interferences can be rapidly detected, and interference frequency change can be continuously tracked. The self-adaption rapid narrow-band interference suppression device has the advantages that the implementation cost is small, the detection is rapid, and the frequency change of the narrow-band interferences can be tracked in a self-adaption tracking way.

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 Applications(China)
IPC IPC(8): H04B1/71H04L25/03
CPCH04B1/71H04B1/7102
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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