摘要
根据新重离子治癌加速器的特点,在已有加速器的基础上提出了一种高可靠性、高速率的实时数据传输系统,将已有加速器的基带信号的直接传输模式改为DPSK调制解调光纤传输模式.在设计过程中,加入了奇偶校验和非本原BCH(17,9)编码解码,提高了信号的可靠性.利用伪随机序列进行扰码,增强了信号的抗干扰能力,通过巴克码帧同步机制,准确地找到了一帧数据的起始,提高了数据传输的准确性.并在FPGA(field programmable gate array)上进行实现,完成了100MHz载波,10MHz基带信号的双向实时数据传输的过程.通过该系统,保证了新重离子治癌加速器同步事例以及电源控制系统的实时数据的高速传输,有效地提升了系统的可靠性和传输速率.
According to the characteristics of the new heavy ion synchrotron,a high-reliability,high-speed and real-time data transmission system is proposed on the basis of the existing accelerator.It changes the direct transmission mode of baseband signal of accelerator to DPSK modulation and demodulation on optical transmission.In the design process,the parity and non-primitive BCH（17,9）encoding and decoding are added to improve the reliability of the signal.Pseudo-random sequence acts as a scrambling code and enhances anti-jamming capability.The exact start of a frame of data is found by Barker code frame synchronization mechanism so as to improve the accuracy of the data transmission.By programming on FPGA,the design completes 100 MHz carrier and 10 MHz baseband signal bidirectional real-time data transmission.The real-time data of the new heavy ion accelerator synchronous event and power control system can be transmitted at high speed.It has improved reliability and transmission rate effectively.
出处
《兰州交通大学学报》
CAS
2015年第1期81-86,共6页
Journal of Lanzhou Jiaotong University
