IRIG-B direct current code coding and decoding device and coding and decoding method thereof

Abstract

The invention belongs to the synchronously timed B code timing field, especially relates to an IRIG-B direct current code coding and decoding device and a coding and decoding method thereof. The device comprises a time receiving module, an IRIG-B code output module, an IRIG-B code receiving module, a time output module, a coding and decoding module and a constant temperature crystal oscillator; the signal input end of the coding and decoding module receives TOD time and second pulses, synchronous frequencies and IRIG-B direct current codes respectively coming from the time receiving module, the constant temperature crystal oscillator and the IRIG-B code receiving module; the signal output end of the coding and decoding module outputs the IRIG-B direct current codes and the TOD time and second pulses respectively to the signal input ends of the IRIG-B code output module and the time output module. According to the invention, coding and modulation of the IRIG-B direct current codes are respectively carried out in the MSS and FPGA modulation units of an ARM microprocessor system in parallel; the demodulation and decoding are respectively carried out in the MSSs of an FPGA demodulation unit and the ARM microprocessor system in parallel; and the device and the method of the invention are advantaged by simple design, high timing precision and stable and reliable system.

Description

technical field [0001] The invention belongs to the field of B-code timing of synchronous timing, and in particular relates to an IRIG-B direct-current code encoding and decoding device and an encoding and decoding method thereof. Background technique [0002] The IRIG-B code is a serial time format code, which was first proposed by the Inter-Range Instrument Group (IRIG) of the United States, and is widely used in time synchronization transmission systems. The IRIG-B code has the characteristics of universal use, standardized interface, and suitable for long-distance transmission. In my country, the test equipment in the fields of industrial control, communication, meteorology, aerospace, power system measurement and protection all adopt the IRIG-B international time standard as the The time synchronization standard of the time system equipment, and formulated the corresponding national military standard. [0003] The DC code is the IRIG-B DC code. The frame period of the D...

AI Technical Summary

Problems solved by technology

[0004] At present, most domestic IRIG-B DC codec codecs use FPGA as the core controller, which consumes a lot of resources, has low synchronization accuracy, and poor work efficiency and stability.

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