Method for improving selectivity of frequency spectrum monitoring channel

A spectrum monitoring and selective technology, applied in the field of electronic information, which can solve the problems of adjacent channel aliasing interference, large rectangular window side lobe amplitude, and reduced channelized monitoring efficiency.

Pending Publication Date: 2021-09-14
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Abstract
  • Description
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Problems solved by technology

It can be seen that only the k value of the rectangular window is the smallest, but the side lobes of the rectangular window have a large amplitude, and the side lobes will cause aliasing interference to adjacent channels, reducing the efficiency of channelized monitoring

Method used

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  • Method for improving selectivity of frequency spectrum monitoring channel
  • Method for improving selectivity of frequency spectrum monitoring channel
  • Method for improving selectivity of frequency spectrum monitoring channel

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0035] In order to overcome the two major shortcomings of the prior art, this patent proposes a method for improving the channel selectivity of spectrum channelization monitoring, such as figure 2 As shown, in addition to the basic windowing and FFT calculation process, the present invention also includes the process of splicing and adding the windowed data.

[0036] The effect of windowed FFT is equivalent to a single-input-multiple-output filter bank. Increasing the length of the window function is equivalent to increasing the order of the filter. The higher the order of the filter, the better the performance of the filter shape factor, so that each FFT frequency The selectivity of the channel where the point is located is better. Based on this principle, the present invention proposes to averagely divide the windowed data into several segme...

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Abstract

The invention discloses a method for improving the selectivity of a frequency spectrum monitoring channel, and belongs to the technical field of electronic information. According to the invention, the frequency spectrum channelization monitoring efficiency is improved by improving the selectivity of a frequency spectrum monitoring channel. The frequency spectrum sub-channel selectivity can be increased by increasing the number of spliced data segments, so that noise in a sub-channel frequency band is reduced, the signal-to-noise ratio of the sub-channel is improved, and the frequency spectrum monitoring sensitivity is improved. By improving the channel selectivity and improving the frequency spectrum monitoring sensitivity, the weak signal monitoring capability can be improved. By improving the channel selectivity and improving the frequency spectrum monitoring sensitivity, the spectrum monitoring dynamic range can be expanded.

Description

technical field [0001] The invention belongs to the technical field of electronic information, and in particular relates to a method for improving channel selectivity of frequency spectrum monitoring. Background technique [0002] Finding and intercepting signals in complex electromagnetic environments is the basic function of spectrum monitoring. Spectrum monitoring needs to obtain the spectrum of the signal, and various signals occupy a specific channel bandwidth, so spectrum channelization monitoring is a prerequisite for obtaining good spectrum monitoring capabilities. However, due to factors such as multipath delay, Doppler frequency shift, fading, radio interference, and path loss during signal propagation, the signal received by the receiving end is weakened and distorted, making the multi-channel signal between the spectrum monitoring channels Mutual interference may easily cause poor channel monitoring capability. [0003] Spectrum calculation is usually realized ...

Claims

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Application Information

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IPC IPC(8): G01R23/165G06F17/14
CPCG01R23/165G06F17/142
Inventor 王锋向长波张超李晓军吕天志
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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