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根据重离子治癌加速器的特点提出了新的一种数据传输方法,在FPGA上实现了DPSK(Differential Phase Shift Keying)调制解调,加入了奇偶校验、BCH编解码、扰码与帧同步系统来提高系统的可靠性,传输信道采用SFP光纤传输,提高了传输的速率,降低了设计成本。本文主要描述系统软硬件的设计和实现细节,重点分析了在传输过程中如何使用FPGA编程方法提高系统的可靠性和稳定性。该系统经过严格压力测试,做到百万次传输无误差,已在重离子治癌加速器现场实际使用,在加速器控制领域首次实现了FPGA结合光纤的DPSK调制解调高速数据传输,对同类系统有较好的借鉴参考作用。
According to the characteristics of the heavy ion cancer accelerator, a new data transmission method is proposed. DPSK (Differential Phase Shift Keying) modulation and demodulation is implemented on the FPGA, and parity-check, BCH codec, scrambling code and frame synchronization system To improve the reliability of the system, the transmission channel using SFP optical transmission, improve the transmission rate and reduce the design cost. This article describes the system hardware and software design and implementation details, focusing on how to use FPGA programming in the transmission process to improve system reliability and stability. The system undergoes rigorous pressure test, so that millions of transmissions are error-free and has been actually used in heavy ion cancer accelerator field. For the first time in accelerator control field, DPSK modulation and demodulation with FPGA combined with optical fiber is adopted for high-speed data transmission. Better reference for reference.