Radio frequency front-end adjacent channel suppression circuit and WLAN access equipment

Abstract

The application relates to a radio frequency front-end adjacent channel suppression circuit. The radio frequency front-end adjacent channel suppression circuit comprises an amplification filtering module, a local oscillator circuit, a down-conversion unit, an interference suppression module and an up-conversion unit in communication connection in order; the amplification filtering module is used for communicating and connecting a radio frequency front-end transceiving module; and the upper-conversion unit is used for communicating and connecting a signal demodulation module. The application further discloses WLAN access equipment. By arranging the amplification filtering module, the local oscillator circuit, the down-conversion unit, the interference suppression module and the up-conversion module, the signal intensity of the adjacent channel interference signal after the intermediate frequency is suppressed after a received radio frequency signal is down-converted to an intermediate frequency signal; and then, the intermediate signal after interference suppression is up-converted back to the radio frequency signal, thereby obtaining the radio frequency after effectively suppressing the adjacent channel interference to send to the signal demodulation module to demodulate. Therefore, the adjacent channel interference can be effectively suppressed without adding insertion loss ona receiving link, and the signal receiving sensitivity is greatly improved.

Description

Technical field [0001] This application relates to the field of communication technology, and in particular to a radio frequency front-end adjacent channel interference suppression circuit and WLAN access equipment. Background technique [0002] With the development of network technology, frequency planning is required when WLAN equipment engineering is deployed. When two wireless access points (Wireless Access Points, APs) use adjacent frequency points and are placed relatively close distances, the signals of the two APs often interfere with each other, deteriorating signal reception sensitivity, and ultimately affecting the service rate. . In the industry's wireless local area network (WLAN) AP equipment centralized procurement bidding test, adjacent channel mutual interference (ACS) is a relatively important test item. [0003] On the market, WLAN baseband and radio frequency chips basically adopt SOC solutions. However, SOC chip manufacturers generally do not provide receivin...

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Problems solved by technology

However, in the process of realizing the present invention, the inventor found that there is a problem of degrading the receiving sensitivity in the traditional anti-jamming technology

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