弹地高速传输系统优化设计

Optimization design of high⁃speed missile⁃to⁃ground signal transmission system

针对弹地传输系统在长距离传输过程中信号会产生衰减和干扰的问题,文中提出一种软硬件相结合的弹地高速传输系统。硬件电路中加入均衡和驱动芯片补偿信号的衰减,通过阻抗匹配减少耦合的影响,提高整个传输链路的传输质量,使接收到的信号波形更完整;在软件优化方面,采用8 B/10 B编码平衡传输数据中“0”和“1”的个数,通过CRC校验验证传输数据的正确性。采用的重传机制中加入包计数,通过识别发送的指令类型以及对应的包计数,有效地判断下一步应该传输的数据包;通过计算获取指令的时间,保证系统可以响应重传;通过对硬件电路和软件逻辑的双重优化,提高传输链路和传输系统的可靠性。验证结果表明,所设计的弹地传输系统在传输LVDS串行数据时,出错位为0,误码率为0,没有丢帧现象。

In allusion to the problems of signal attenuation and interference in the long distance transmission of missile⁃to⁃ground transmission system,a high⁃speed missile⁃to⁃ground transmission system of combining software with hardware is proposed.In the hardware circuit,the equalization and driver chips are added to compensate the signal attenuation,reduce the coupling effect by impedance matching,improve the transmission quality of the whole transmission link,and make the received signal waveform more complete.In the software optimization,8 B/10 B coding is used to balance the number of"0"and"1"in transmitted data,and the correctness of transmitted data is verified by means of CRC verification.The packet count is added to the retransmission mechanism.By identifying the type of sent instructions and the corresponding packet count,the next data packet to be transmitted can be determined effectively.The system can respond to retransmission by calculating the time of obtaining instructions.The reliability of transmission link and transmission system can be improved by means of the dual optimization of hardware circuit and software logic.The verification results show that when the designed missile⁃to⁃ground transmission system transmits LVDS serial data,its dislocation and bit error rate are 0 respectirely,and there is no frame loss.