TTE network clock calibration method and system
A network clock and calibration method technology, applied in the field of communication, can solve the problems of reducing the effective performance of avionics network bandwidth, increasing the number of PCF frames, etc., achieving advanced real-time tracking and adjustment capabilities, improving time difference measurement accuracy, and reducing temperature drift.
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Embodiment 1
[0103] This embodiment provides a TTE network clock calibration method, such as Figure 4 As shown, the method includes the following steps:
[0104] In the first step, the synchronization word detection module receives the global synchronization PCF message frame ②, and detects and outputs the synchronization flag pulse signal ③.
[0105] In the second step, the phase synchronization detection module receives the synchronization mark pulse signal ③ and the local clock signal ①, and calculates the phase deviation to obtain the phase deviation result output after the phase detection ④.
[0106] In the third step, the coarse synchronous delay modulation module adjusts the local clock signal ① according to the phase deviation result ④ to obtain the coarse synchronous clock ⑤ after the delay chain delays the local clock.
[0107] In the fourth step, the LMS adaptive filter training module performs filter training according to the phase deviation result ④, and the filter parameter...
Embodiment 2
[0113] This embodiment provides a TTE network clock calibration system, such as Figure 4 As shown, the system includes a coarse synchronization subsystem and a fine synchronization subsystem; the coarse synchronization subsystem includes a synchronization word detection module, a phase synchronization detection module and a coarse synchronization delay modulation module; the fine synchronization subsystem includes a LMS Adaptive filter training module, coefficient storage module, drift compensation model module and fine synchronization delay processing module.
[0114] The synchronization word detection module is used to receive the global synchronization PCF message frame ②, and detect and output the synchronization mark pulse signal ③.
[0115] The phase synchronization detection module is used to receive the synchronization mark pulse signal ③ and the local clock signal ①, and calculate the phase deviation to obtain the output phase deviation result ④ after the phase detec...
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