Method and device for detecting interference

A one-way, carrier channel technology, applied in the field of wireless communication, can solve the problem of low accuracy and achieve the effect of low probability of false alarm and simple calculation method

Inactive Publication Date: 2013-06-05
ZTE CORP
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Problems solved by technology

[0003] The current detection technology is either based on the first-order statistical characteristics of noise and interference, or based on specific spectral characteristics, and the detection accuracy of these methods is not very high

Method used

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  • Method and device for detecting interference

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Embodiment Construction

[0035] The channel in the wireless communication system is not an ideal channel, and there are various random fluctuating noises, including atmospheric noise, floor noise and impulse noise of electronic equipment, etc. In addition, it should be pointed out that due to frequency reuse and other reasons, there are often subject to interference, these independent random noises are replaced by a random signal ε k Indicates that ε k obey the normal distribution, that is, ε k ~N(0,σ 2 ), therefore, the noise-limited wireless channel model is expressed as:

[0036] y k = Σ j = 0 L H - 1 h j u k - j + ϵ k ...

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Abstract

The invention discloses a method and a device for detecting interference. The method and the device for detecting the interference comprise the following steps: conducting channel estimation on a carrier current channel so as to obtain a tap of an impact response of the carrier current channel; calculating a self-correlation function of the carrier current channel, a self-correlation function of a received baseband symbol and a self-correlation function of the interference or a noise, and checking whether a formula is realized or not according to the tap of the impact response of the carrier current channel; when the formula is realized, then inexistence of the interference is ascertained; and when the formula is not realized, then existence of the interference is ascertained. The method and the device for detecting the interference are simple in calculation method and low in false dismissal probability of detection of the interference. By adopting the method for detecting the interference, existence of the interference can be detected accurately, so that a basis is provided for the decision that whether an interference suppression or an interference elimination algorithm is adopted or not when a digital baseband is demodulated in a balanced mode.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for detecting interference. Background technique [0002] In wireless communication, there are two main situations, one is to add Gaussian white noise to the wireless channel, and the other is to add interference to the wireless channel. In order to more accurately equalize and demodulate the wireless signal, different processing methods are generally adopted for the two situations. In other words, for the interference-limited situation, interference suppression or interference cancellation is required. Therefore, before performing equalized demodulation of the digital baseband, it is very important to determine whether the wireless signal received by the current receiver is noise-limited or interference-limited. [0003] The current detection technology is either based on the first-order statistical characteristics of noise and interfe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04W24/00
CPCH04B17/00H04B15/00H04B17/005H04B1/1027H04B17/345
Inventor 侯晓辉
Owner ZTE CORP
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