nb-iot terminal verification platform and its clock synchronization method
A verification platform and clock synchronization technology, applied in the field of the Internet of Things, can solve the problem of poor flexibility in the use of clock sources
Active Publication Date: 2020-09-25
广州粒子微电子有限公司
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[0004] Therefore, an object of the embodiments of the present disclosure is to provide a clock synchronization solution applied to the NB-IoT wireless terminal verification platform to solve the problems of the need to add additional clock drive circuits and the poor flexibility of clock sources in related technologies
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[0043] Embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings.
[0044] Embodiments of the present disclosure are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Apparently, the described embodiments are only some of the embodiments of the present disclosure, not all of them. The present disclosure can also be implemented or applied through different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, a...
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The embodiment of the invention provides an NB-IoT terminal verification platform and a clock synchronization method thereof. The method comprises the following steps: detecting a falling edge of an associated clock of an SDR radio frequency board by using a high-frequency clock; driving a counter by using the high-frequency clock and resetting the counter by using a falling edge of the associatedclock to obtain a working clock of the FPGA verification board, wherein the maximum value of the counter is determined by a frequency division ratio of the high-frequency clock to the working clock;carrying out time threshold sampling on a narrowband main synchronization reference signal of the NB-IoT base station simulation equipment through the SDR radio frequency board so as to detect the narrowband main synchronization reference signal, and calculating a frequency deviation value; and configuring a fine tuning value of the DCXO of the SDR radio frequency board according to the deviationvalue of the frequency so as to correspondingly change the reference clock frequency of the SDR radio frequency board. According to the method provided by the embodiment of the invention, the problemsthat an extra clock driving circuit needs to be added and the clock source is poor in use flexibility in the related art are solved.
Description
technical field [0001] The present disclosure relates to the technical field of the Internet of Things, and in particular to an NB-IoT terminal verification platform and a clock synchronization method thereof. Background technique [0002] With the development of wireless technology, the Internet of Things is one of the important development directions. Among them, the Narrow Band Internet Of Things (NB-IoT) system has obvious advantages in the application of the Internet of Things, and is widely used in smart meter reading, precision farming, industrial automation, smart buildings, environmental monitoring and other scenarios. The development of NB-IoT terminal chips requires a verification platform to verify the functional coverage of the NB-IoT protocol. [0003] However, the clock synchronization method in the prior art is complex, high in cost and poor in flexibility for system adaptation. Contents of the invention [0004] Therefore, an object of the embodiments of...
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IPC IPC(8): H04J3/06H04W56/00
CPCH04J3/0638H04J3/0644H04W56/001H04W56/0015
Inventor 梁智斌
Owner 广州粒子微电子有限公司