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Consecutive mean excision(CME)-based improved interference detection method

An improved technology for interference detection, applied in the field of anti-interference, can solve problems such as performance degradation and failure, and achieve the effect of fast interference detection

Inactive Publication Date: 2017-11-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] However, when the interference factor (ratio of interference bandwidth to observation bandwidth) of the CME detection algorithm is greater than 0.6, the performance of the CME detection algorithm drops sharply and eventually fails

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  • Consecutive mean excision(CME)-based improved interference detection method
  • Consecutive mean excision(CME)-based improved interference detection method

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Embodiment Construction

[0026] The present invention will be described below in conjunction with the accompanying drawings.

[0027] The Matlab2014b simulation platform is used to run the experiment. The simulation parameters are: the communication channel is a Gaussian channel, the interference signal is a partial band interference, and multiple interference factors are set [0.6, 0.7, 0.8]. Here, multiple interference factors are set to facilitate comparison algorithms performance in a variety of situations.

[0028] Such as figure 1 As shown, an improved interference detection algorithm based on CME, the specific steps are as follows:

[0029] Step 1: Initialize

[0030] 1.1 Set the number of FFT points of the interference detection system to 1024.

[0031] 1.2 Set the block size in the algorithm as M=8.

[0032] 1.3 Setting false alarm probability P f =0.005, calculate the threshold factor γ=2.5973.

[0033] Step 2: Perform FFT on the received signal r(n), and calculate the amplitude to obta...

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Abstract

The present invention belongs to the anti-interference field, in particular relates to an interference detection method. A CME-based improved interference detection method is characterized by using a partitioning thinking to guarantee the robustness of an algorithm to the interference factors, at the same time, using a minimum selection thinking to replace a ranking algorithm to thereby achieve the purposes of reducing the complexity of the algorithm and detecting rapidly. The method of the present invention does not require the priori knowledge to the interference, and is suitable for a general application scene, so that the detection complexity is lower, at the same time, the adaptive characteristics of the algorithm are retained.

Description

technical field [0001] The invention belongs to the field of anti-interference, in particular to an interference detection method. Background technique [0002] Wireless communication anti-jamming technology obtains the uninterferenced spectrum position at the current time through interference detection, and uses these available spectrums for data transmission to achieve the purpose of anti-jamming communication. [0003] The binary hypothesis model for interference detection is: Among them, r(k) represents the received signal, n(k) represents Gaussian white noise, and j(k) represents interference. Interference detection is to judge whether there is interference j(k) according to the received signal. [0004] Energy detection has been widely used in hardware implementation due to its simple principle and convenient implementation, but the threshold of energy detection is affected by noise power. In order to adapt to different electromagnetic environments, document 1 "Con...

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Application Information

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IPC IPC(8): H04B17/345H04J11/00
CPCH04B17/345H04J11/0023
Inventor 朱付强陈亚丁刘宝城王军
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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