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Narrow band interference detection method based on principal value interval analysis

A technology of principal value interval analysis and narrow-band interference, applied in electrical components, transmission systems, etc., can solve problems such as poor adaptability of narrow-band interference detection, high computational complexity, complex communication mechanism, etc., and achieve real-time or quasi-real-time analysis and complex calculation The effect of low accuracy and high detection accuracy

Active Publication Date: 2014-04-16
PLA UNIV OF SCI & TECH
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Problems solved by technology

This type of method judges the existence of narrow-band interference by comparing the peak value and mean value of the signal spectrum, but due to the influence of noise and the fluctuation of the signal spectrum itself, the determination stability of this type of method is poor
[0006] It can be seen that the problems existing in the existing technology are: poor adaptability to narrowband interference detection, weak anti-noise performance, high computational complexity, and prior knowledge required. Difficult to obtain applications such as satellite communications and deep space communications

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  • Narrow band interference detection method based on principal value interval analysis
  • Narrow band interference detection method based on principal value interval analysis
  • Narrow band interference detection method based on principal value interval analysis

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[0024] Such as figure 1 As shown, the present invention is based on the narrow-band interference detection method of principal value interval analysis, comprises the following steps:

[0025] 10) Signal spectrum acquisition: obtain preprocessed signal spectrum from front-end spectrum generation equipment, signal detection equipment and signal preprocessing equipment;

[0026] In the step of obtaining the signal spectrum (10), the signal spectrum refers to a spectrum containing a signal to be processed and having a bandwidth equal to or slightly larger than the bandwidth of the signal, and the preprocessing device performs filtering processing on the signal to be processed (such as mean filter) to reduce signal fluctuations.

[0027] 20) Histogram acquisition: According to the signal spectrum, calculate the histogram of the distribution of spectrum amplitude values;

[0028] The step of obtaining the histogram (20) includes:

[0029] 21) Find the maximum and minimum values ​...

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Abstract

The invention discloses a narrow band interference detection method based on principal value interval analysis. The narrow band interference detection method based on the principal value interval analysis comprises the following steps of obtaining preprocessed signal frequency spectrums from a front end frequency spectrum generation device, a signal detection device and a signal preprocessing device; computing to obtain a frequency spectrum distributed column diagram according to signal frequency spectrums; computing to obtain a signal main value interval according to the column diagram distribution; iterating the frequency spectrums and finding the narrow band interference according to the principal value interval. The narrow band detection method based on the principal value interval analysis has the advantages of being strong in adaptability, high in accuracy and good in stability.

Description

technical field [0001] The invention belongs to the field of wireless communication and digital signal processing, in particular to a narrow-band interference detection method based on principal value interval analysis. Background technique [0002] Narrowband interference usually refers to a kind of interference that has a certain bandwidth and its bandwidth is smaller than the signal bandwidth. In the field of wireless signal transmission, the wireless transmission environment is complex and changeable, especially in urban areas with high communication density, narrowband interference caused by unsound network planning, equipment interference, AC transmission and other reasons is unavoidable. In addition, in personal wireless communication, spread spectrum technology is widely used. Due to the limitation of the available frequency band, the spread spectrum communication system needs to share the same frequency band with the existing narrowband communication system, which ...

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Application Information

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IPC IPC(8): H04B1/71H04B1/7105
Inventor 张更新郑晖韩福春胡婧孙谦李永强谢智东边东明
Owner PLA UNIV OF SCI & TECH
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