Device and method for improving frequency stability of WIFI (wireless fidelity) access point

A frequency stability and access point technology, applied in power oscillators, electrical components, wireless communications, etc., can solve problems such as OFDM orthogonality damage, communication quality deterioration, crystal oscillator frequency calibration failure, etc., to improve communication quality, The effect of ensuring communication reliability and guaranteeing orthogonality

Active Publication Date: 2011-04-20
TCL CORPORATION
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Problems solved by technology

This method cannot calibrate the crystal frequency drift caused by ambient temperature changes. When the ambient temperature of the device is greatly different from the ambient temperature during factory testing, the crystal oscillator frequency calibration will fail, the orthogonality of OFDM will be destroyed, and the communication quality will deteriorate. poor adaptability

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  • Device and method for improving frequency stability of WIFI (wireless fidelity) access point
  • Device and method for improving frequency stability of WIFI (wireless fidelity) access point
  • Device and method for improving frequency stability of WIFI (wireless fidelity) access point

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Embodiment Construction

[0034] A device and method for improving the frequency stability of a WIFI access point in the present invention mainly uses a temperature detection circuit and a voltage compensation circuit to overcome the shortcomings of poor crystal temperature accuracy of a WLAN access point and poor adaptability of fixed voltage compensation. In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] An embodiment of the present invention provides a device for improving the frequency stability of WIFI access points, such as image 3 As shown, it mainly includes a temperature detection circuit 100, a voltage compensation circuit 200 and a crystal oscillator...

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Abstract

The invention relates to the field of WLAN (wireless local area network) wireless access, disclosing a device and a method for improving the frequency stability of a WIFI access point. The device for improving the frequency stability of the WIFI access point is composed of a temperature detection circuit, a voltage compensation circuit and a crystal oscillator, wherein the temperature detection circuit is connected with the voltage compensation circuit connected with the crystal oscillator. The defects of poor accuracy of the crystal temperature of the WLAN access point and weak fixed voltagecompensation adaptability is overcome. In the invention, the influence on the communication quality of the WLAN access point by environmental temperature is considered fully, communication quality byimproving access point frequency accuracy is improved and the orthogonality of OFDM (Orthogonal Frequency Division Multiplexing) subcarrier is ensured. Meanwhile, frequency accuracy is dynamically adjusted, so that equipment can adapt to environmental temperature variation and ensure the communication reliability of the WLAN access point.

Description

technical field [0001] The present invention relates to the field of WLAN wireless access, in particular to a device and method for improving the frequency stability of a WIFI access point. Background technique [0002] Various clocks of WLAN (Wireless Local Area Networks) access points are provided by crystal oscillators. The accuracy of crystal oscillators determines the accuracy of various clocks of WLAN access points, and also determines the accuracy of radio frequency. [0003] Due to the influence of the ambient temperature, the frequency of the ordinary quartz crystal oscillator will drift. The frequency drift of the crystal oscillator caused by the change of the crystal temperature can be included in the category of crystal long-term stability. If the crystal is allowed to oscillate freely, that is, if the long-term stability defect of the crystal is not resolved, the clock accuracy of the WLAN access point will deteriorate over time. [0004] Currently in the IEEE8...

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Application Information

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IPC IPC(8): H03B5/04H04W84/12H04W88/08
Inventor 王士林王兴野
Owner TCL CORPORATION
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