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Method and device for suppressing WIFI signal co-channel interference

A co-channel interference and signal technology, applied in wireless communication, electrical components, network planning, etc., can solve the problems of performance degradation, receiver implementation complexity and cost increase, etc., and achieve the effect of suppressing interference

Inactive Publication Date: 2017-09-19
中兴国通通讯装备技术(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a wireless communication system needs to be deployed on the same frequency as the WIFI system, the traditional method of suppressing WIFI co-frequency interference generally uses a high-performance interference suppression algorithm (such as accurate interference signal covariance matrix estimation) on the wireless communication system receiver. and high-performance MMSE equalizer) to separate and suppress WIFI interference signals. The effect of interference suppression is proportional to the complexity of the receiver algorithm. In order to achieve a certain interference suppression effect, the complexity and cost of the receiver must be greatly increased, and when the WIFI signal is dominant in power, the performance of the traditional interference suppression algorithm will deteriorate rapidly

Method used

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  • Method and device for suppressing WIFI signal co-channel interference
  • Method and device for suppressing WIFI signal co-channel interference
  • Method and device for suppressing WIFI signal co-channel interference

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Embodiment approach 1

[0069] Implementation Option 1: If figure 2 As shown, a wireless communication system based on the 3GPP LTE TDD standard should be established in the ISM 2.4GHz frequency band, and the working frequency band is 2450-2460MHz. There is a WIFI system within the effective coverage of the LTE communication system, and the coverage radius of the WIFI system is 20 meters. According to the method of the present invention, the generation parameters of the interference signal are obtained according to the following steps.

[0070] Step 1: The frequency band of the WIFI system that needs to be suppressed is the effective bandwidth of the LTE system. Remove the 0.5MHz guard bands on both sides of the 10MHz bandwidth of the LTE system, and the actual effective frequency range is [2450.5MHz, 2459.5MHz].

[0071] Step 2: If figure 1 As shown, from the subchannel distribution of the WIFI system in the 2.4GHz frequency band and the frequency band of the LTE system in this example, the WIFI ...

Embodiment approach 2

[0076] Implementation plan two: if image 3 As shown, a wireless communication ground-to-air coverage dedicated communication system ATG2.4 is to be deployed on the 2.4GHz WIFI frequency band. The communication system is divided into three carriers in the frequency domain, each carrier has an effective bandwidth of 18Mhz, and the working frequency bands are 2408.6~2426.6MHz, 2427.2~2445.2MHz and 2445.8~2463.8MHz. The interference from the WIFI system needs to be suppressed on the corresponding frequency bands of the three carriers, and the coverage radius of the WIFI system is 25 meters. According to the method of the present invention, the transmission parameters of the interference signal are obtained according to the following steps.

[0077] Step 1: The frequency band of the WIFI system that needs to be suppressed is the effective bandwidth of the LTE system. In this case, it is the three carrier frequency bands of the wireless communication system ATG2.4 to be deployed, ...

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Abstract

The invention discloses a method and device for suppressing the WIFI signal co-channel interference. The method includes the steps of forming interference to a WIFI communication channel on a frequency resource by sending interference signals continuously or periodically on the specific frequency so that a WIFI system cannot work normally on the frequency band and switches to another frequency band, thereby leaving the frequency resource to other communication systems and achieving the purpose of suppressing the WIFI system interference. The device includes a radio frequency signal transceiver module, a wireless parameter detection module, an interference signal generating module, a power supply module and a storage module. The method and device of the invention have the advantage of being capable of suppressing the interference of the WIFI system so that the WIFI system can switch to another frequency band or stop working when another communication system co-exists with the WIFI on the coincident or partially coincident frequency resource. The method and device of the invention can also be used for interfering with the WIFI system in a certain frequency band and achieving the purpose of stopping the WIFI system from data transmission by suppressing the data receiving and sending thereof.

Description

technical field [0001] The invention relates to a method and a device for suppressing co-frequency interference of WIFI signals, belonging to the technical field of wireless communication. Background technique [0002] At present, with the rapid development of wireless communication technology and mobile Internet today, the deployment density of wireless communication equipment is increasing, and the shortage of wireless spectrum resources is becoming increasingly prominent. The problem of mutual interference caused by the use of the same frequency by different communication technologies has become more and more serious. Seriously, this not only increases the difficulty of network deployment, but also greatly affects the overall capacity of the communication network and the experience of end users. [0003] The full name of WIFI is Wireless Fidelity. It is a wireless communication technology based on the IEEE 802.11 series protocol. It usually uses two independent frequency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W36/20H04W36/30
CPCH04W16/14H04W36/20H04W36/30
Inventor 张波龙海波谭伟李春旭
Owner 中兴国通通讯装备技术(北京)有限公司