Design and Implement for Precision Time Protocol Based on 88E1512
This paper expounds the demand for high-precision airborne time synchronization and proposes a typical B-code time synchronization architecture.This architecture includes a time source,a time processing center,and a time user end.The time processing center is used to receive,synchronize,and select time source information,output B-code time based on GJB2991 encoding,and then distribute the B-code time to various user terminals.The distribution accuracy is determined by the distribution path error and chip processing error.The analysis and testing of the B-code time distribution accuracy for typical RS485 chips show that the B-code time distribution accuracy is better than 10ns.Keywords:intelligent control,formation collaboration,time synchronization,B-code,RS485.
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