Method and system for correcting carrier frequency of wireless communication without crystal oscillator
A carrier frequency and wireless communication technology, applied in the modulation carrier system, transmission system, carrier adjustment, etc., can solve the problems of reducing quality and accuracy
Active Publication Date: 2019-07-02
ZHUHAI JIELI TECH
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Problems solved by technology
In the traditional technology, there are also methods of using complex modulation and demodulation methods to reduce the quality and accuracy of the carrier frequency, or recompensating the oscillator or PLL (Phase Locked Loop) based on the signal demodulated by the receiver. In order to achieve the purpose of correcting the carrier frequency, although it can improve the communication quality, it still depends on the crystal oscillator to provide high-precision reference
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[0056] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0057] figure 1 It is a schematic flow chart of a crystal oscillator-free wireless communication carrier frequency correction method of an embodiment, as figure 1 The shown wireless communication carrier frequency correction method without a crystal oscillator includes:
[0058] Step S100, adjusting the carrier frequency of the crystal-less oscillator to the first receiving frequency according to the transmitting frequency of the wireless signal, which is a known frequency.
[0059] Specifically, the frequency of the wireless signal to be received is known, which is not only applicable to operato...
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The invention relates to a wireless communication carrier frequency oscillator correction method and system without a crystal oscillator. The method comprises the following steps: adjusting the carrier frequency of the crystal oscillator to first receiving frequency according to the transmitting frequency of a wireless signal, wherein the transmitting frequency of the wireless signal is known frequency; monitoring the wireless signal at the first receiving frequency, and if the wireless signal is monitored, setting the first receiving frequency as the actual receiving frequency; if the wireless signal is not monitored at the first receiving frequency, adjusting the first receiving frequency according to a preset step length until the wireless signal is monitored, and setting the receiving frequency where the wireless signal is monitored as the actual receiving frequency; calculating a difference between the known frequency and the actual receiving frequency, and determining the difference as a carrier frequency offset; and adjusting the carrier frequency of the crystal oscillator according to the carrier frequency offset. By adoption of the wireless communication carrier frequency oscillator correction method and system provided by the invention, the production cost of the carrier frequency can be reduced, and the high precision and high quality demands of the carrier frequency can also be met.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and system for correcting carrier frequency of wireless communication without a crystal oscillator. Background technique [0002] In wireless communication, the carrier frequency works at a relatively high frequency, and there are high requirements on the frequency accuracy and phase-to-noise ratio of the carrier frequency. In order to meet the accuracy and quality requirements of the carrier frequency, active crystal oscillators or high-quality and high-precision passive crystal oscillators are usually used in wireless communication systems to achieve the purpose of generating high-quality and high-precision carrier frequencies, but the use of active crystal oscillators Or the cost of high-quality and high-precision passive crystal oscillators is very high. In traditional technology, there are also methods of using complex modulation and demodulation met...
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IPC IPC(8): H04L27/00
CPCH04L27/0014H04L2027/0026
Inventor 温治晓
Owner ZHUHAI JIELI TECH