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Narrow-band interference prevention method and system

An anti-narrowband, interference strength technology, applied in the field of spread spectrum communication, can solve the problems of reducing the reliability of spread spectrum communication links and so on

Active Publication Date: 2016-06-01
SPACE STAR TECH CO LTD
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  • Description
  • Claims
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Problems solved by technology

[0003] In the process of spread spectrum communication, signal interference within the bandwidth of the device and much smaller than the system bandwidth can be considered as narrowband interference. Due to the existence of narrowband interference, the reliability of the spread spectrum communication link is reduced

Method used

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  • Narrow-band interference prevention method and system

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Embodiment Construction

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0062] The embodiment of the present invention provides an anti-narrowband interference method, which is mainly used in the field of anti-narrowband interference in direct sequence spread spectrum communication systems. The flow chart of the method is as follows figure 1 shown, including steps:

[0063] Step S101: Roughly estimate the interference strength of the current input signal, and determine the window function corresponding to the input signal;

[006...

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Abstract

Disclosed in the invention is a narrow-band interference prevention method. Coarse estimation of interference intensity is carried out on input signals and window functions are determined; according to the window functions, grouped windowing processing is carried out on the input signals, and N-point FFT conversion is carried out on each group of windowing input signals to obtain frequency-domain spectral lines of windowing input signals; a signal outputted after each N-point FFT conversion is used as a signal group, the signal groups are divided into a plurality of sub groups with the same point number, and an initial clamping value is determined based on signal amplitudes of all sub groups; an interference spectral line in the frequency-domain spectral lines is filtered by combining an adaptive variable threshold algorithm and the initial clamping value; IFFT conversion is carried out on signals after interference suppression to output time-domain signals; and the time-domain signals at all paths are combined and then are outputted, thereby completing narrow-band interference prevention of input signals. With the method, the interference spectral line can be filtered effectively and the link reliability can be improved.

Description

technical field [0001] The invention relates to the field of spread spectrum communication, in particular to an anti-narrowband interference method and system. Background technique [0002] Spread spectrum communication is a method of information transmission, the frequency bandwidth occupied by the signal is much larger than the minimum bandwidth necessary for the information to be transmitted; the expansion of the frequency band is completed through an independent code sequence (usually a pseudo-random code). and modulation method; at the receiving end, the same code is used for related synchronous reception, despreading, and recovery of the transmitted information data. [0003] In the process of spread spectrum communication, the signal interference within the bandwidth range of the device and much smaller than the system bandwidth can be considered as narrowband interference. Due to the existence of narrowband interference, the reliability of the spread spectrum communi...

Claims

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Application Information

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IPC IPC(8): H04B1/71
Inventor 李婷婷赵媛谭维凤黄琬詹天南李爽
Owner SPACE STAR TECH CO LTD
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