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Automatic correction method of offset frequency

An automatic correction and frequency correction technology, which is applied to the shaping network, electrical components, transmission system, etc. Effect of effective transmission distance, improvement of wireless operation efficiency, and automatic frequency correction

Inactive Publication Date: 2014-08-06
郑国书
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In FSK modulation, frequency is the most important factor to restore the signal, and the 2.4G mouse or keyboard currently available in the market has an error tolerance of ±20ppm (parts per million), which reduces the effective wireless transmission distance About 32%, seriously affecting wireless operation performance
[0004] In addition, there are more or less errors between the receiving frequency of the above-mentioned conventional technology receiver and the transmitting frequency of the mouse. The more the frequency deviation between the sender and the receiver, the shorter the transmission distance between each pair of receivers and the mouse will be. The change will cause the frequency deviation to increase, resulting in a higher packet loss rate, and the transmission distance will be even worse.

Method used

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  • Automatic correction method of offset frequency
  • Automatic correction method of offset frequency
  • Automatic correction method of offset frequency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] refer to figure 1 and figure 2 , are respectively a schematic diagram of the system and a schematic diagram of the operation flow of the method for automatically correcting the offset frequency in Embodiment 1 of the present invention. first as figure 1 As shown, the automatic frequency offset correction method in Embodiment 1 of the present invention mainly uses the master control device 10 to automatically correct the frequency offset of the slave device 20, and the master control device 10 at least includes a master control wireless transceiver unit 12 and a master control core unit 14, and the slave device 20 includes at least a slave wireless transceiver unit 22, a slave control unit 24, and a slave frequency generation unit 26, wherein the master wireless transceiver unit 12 is controlled by the master core unit 14 to send and receive wireless signals RF, and the slave control unit 24 controls the slave wireless transceiver unit 22 to transmit and receive wirel...

Embodiment 2

[0065] refer to image 3 and Figure 4 , are respectively a schematic diagram of the system and a schematic diagram of the operation flow of the offset frequency automatic correction method according to Embodiment 2 of the present invention. Such as image 3 and Figure 4 As shown, the method for automatically correcting the frequency offset in Embodiment 2 of the present invention is similar to the above-mentioned Embodiment 1, and the main difference is that the method for automatically correcting the frequency offset in Embodiment 2 is based on the standard frequency of the master device 10 by the slave device 20 Parameter FP for frequency adjustment of the frequency signal FS.

[0066] Specifically, the method for automatically correcting frequency offset in Embodiment 2 of the present invention starts from step S11, wherein the main control core unit 14 of the main control device 10 counts the internal frequency within a default time to generate a standard frequency pa...

Embodiment 3

[0071] In the following, reference will be made to Figure 5 , is a schematic diagram of the system of the automatic frequency offset correction method in Embodiment 3 of the present invention, so as to describe the technical features of the automatic frequency offset correction method in Embodiment 3 in detail.

[0072] Such as Figure 5As shown, Embodiment 3 is similar to Embodiment 1 and Embodiment 2 above. The main difference is that Embodiment 3 further includes a peripheral wireless unit 30, and the main control device 10 includes a main control core unit 14 and a peripheral device transceiver unit. 16, that is, the main control wireless transceiver unit 12 of Embodiment 1 and Embodiment 2 is replaced by a peripheral device transceiver unit 16, wherein the peripheral wireless unit 30 can be an external transmitter device, such as a commonly called Dongle card. The peripheral wireless unit 30 is electrically connected to the peripheral device transceiver unit 16, for exa...

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Abstract

The invention discloses an automatic correction method of offset frequency. The automatic frequency correction function is provided for a master control device and a slave device. The master control device comprises a master control wireless transmit-receive unit and a master control core unit, and the slave device comprises a slave wireless transmit-receive unit, a slave control unit and a slave frequency generating unit. The master control core unit controls the master control wireless transmit-receive unit to receive and transmit wireless signals, the slave frequency generating unit provides frequency signals for the slave wireless transmit-receive unit and the slave control unit, and the slave control unit controls the slave wireless transmit-receive unit to receive and transmit wireless signals. A frequency correction parameter is generated and transmitted by the slave device, and received by the master control device, a standard frequency parameter is compared, a frequency correction command is generated, and the frequency correction command is received by the slave device so that the frequency of the slave device can be corrected.

Description

technical field [0001] The invention relates to a method for automatic correction of frequency deviation, in particular, using standard frequency parameters generated by a master control device and frequency correction parameters generated by a slave device to determine the degree of frequency offset between the master control device and the slave device and automatically correct The frequency of the slave device. Background technique [0002] Since the electronic products with wireless functions provide convenient operation and user interfaces, they are widely used by users and become increasingly popular, especially portable products, such as computer peripheral devices or mobile phone peripheral devices. [0003] In the conventional technology, taking 2.4G mouse or keyboard as an example, the wireless signal transmission most often adopts frequency shift modulation (Frequency Shift Keying, FSK), that is, frequency modulation, in which the transmitter will convert the digi...

Claims

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Application Information

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IPC IPC(8): H04L25/03H04B1/40
Inventor 郑国书
Owner 郑国书