Synchronous locking method and wireless telecommunication device

Abstract

The invention provides a synchronous locking method and a wireless telecommunication device. The synchronous locking method includes that the wireless telecommunication device performs down-conversion processing on radio-frequency signals coming from an Acer stand based on local oscillation signals so as to generate intermediate-frequency signals, frequency deviation value of the intermediate-frequency signals relative to a theoretical intermediate frequency is calculated, and frequency of the local oscillation signals is regulated according to the frequency deviation value so as to lead the absolute value of a new frequency deviation value calculated after another radio-frequency signals coming from the Acer stand are received again is smaller than a preset frequency deviation threshold value. Based on the radio-frequency signals coming from the Acer stand, synchronous locking of a clock is achieved, out-of-step of the clock caused by failure of a global position system (GPS) is avoided, accuracy of the clock can be maintained in a long period, and accordingly stability and reliability of clock synchronization are improved. In addition, a GPS module is not needed to be arranged, thereby being favorable for simplifying design of a synchronous system, lessening size of the device and reducing production cost and construction complexity.

Description

technical field [0001] The invention relates to a synchronous locking method and wireless communication equipment, belonging to the field of wireless communication. Background technique [0002] Wireless communication equipment, such as micro base stations, secondary base stations, and high-speed rail vehicle repeaters, need to perform signal processing based on a high-precision clock synchronization system. Therefore, existing wireless communication equipment generally uses the Global Positioning System (Global Positioning System) The Positioning System (referred to as: GPS) module uses the second pulse signal provided by it to lock the clock of the device to achieve clock synchronization. [0003] There are at least the following problems in the prior art: GPS is not an extremely reliable system, and will be affected by many unknown factors such as GPS receiver performance, weather, geographical location, external environment, Sino-US strategic relationship; The clock sys...

AI Technical Summary

Problems solved by technology

[0003] There are at least the following problems in the prior art: GPS is not an extremely reliable system, and will be affected by many unknown factors such as GPS receiver performance, weather, geographical location, external environment, Sino-US strategic relationship; The clock system is out of sync, which leads to poor clock performance and signal processing errors; in addition, the GPS module is large in size and high in cost, and a GPS receiving antenna must be installed, so the construction complexity is high

But the disadvantage of this method is that OCXO can only maintain the clock accuracy in a short period of time. Since the GPS cannot be locked synchronously after the failure, it will not be able to maintain the clock accuracy when the GPS fails for a long time.

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