Wireless communication device and system

Abstract

The invention discloses a wireless communication device and system, a control module outputs a corresponding control signal according to a current working channel of a wireless module, and a band-pass filter adjusts the center frequency of the band-pass filter after receiving the control signal so as to adapt to the current working channel of the wireless module. And after adjustment, a received first wireless signal transmitted by the wireless module or a received second wireless signal transmitted by the wireless transceiver module is filtered. On one hand, the band-pass filter can selectively filter the first wireless signal and the second wireless signal, so that mutual interference between a current working channel and other channels is effectively suppressed, and floor noise of the band-pass filter to lifting of other equipment and out-of-band noise received by the band-pass filter by the band-pass filter by the band-pass filter by the band-pass filter by the band-pass filter are reduced; normal work of the wireless communication device is ensured; on the other hand, the method can adapt to a plurality of working channels of a wireless communication device.

Description

Technical field [0001] The present invention relates to the technical field of communication equipment, and more particularly to a wireless communication device and system. Background technique [0002] Today's wireless technology is widely used in the field of data transmission. Take 2.4G band as an example. Because of its frequency band in ISM (Industrial Science, Science, Medical Frequency ", is a non-licosible frequency band in many countries, as long as the transmit power meets regulatory requirements This band can be used without reporting. This leads to the more and more radio signals in the actual environment, such as Wi-Fi, Bluetooth, ZigBee, etc., especially low cost 2.4G band Wi-Fi devices, everywhere. In general, the wireless device of the 2.4G band in order to avoid interference between mutual interference, widely used frequency division technology, wireless communication devices of different networks work in different wireless channels. For example, a common 2.4G fr...

AI Technical Summary

Problems solved by technology

[0004] 2) The impact of other devices on this device: In order to improve the communication distance, the general 2.4G wireless devices will add PA (Power Amplifier, power amplifier) ​​and LNA (Low Noise Amplifier, low noise amplifier) ​​before the antenna, due to the generally increased LNA The frequency receiving range is 2400-2483.5MHz or wider, and it will receive wireless signals of other channels except the working frequency band (such as image 3 shown), causing the LNA to work in a saturated state, distorting the signal and failing to work

E.g image 3 Router A (built-in high-gain LNA), when there are many other 2.4G wireless routers working near router A, router A cannot communicate with the STA (Station) connected to it normally.

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