The Desing And Implementation Of The Battlefield Data Transmission System Based On 2B+D With Time-Delay Measuring

In modern warfare, with air threat, air defence is more and more important. With the advantages of high muzzle velocity, high frequency of shooting, short time to get ready to fight, quick response, and good effect on targets in low altitude, air defense artillery is still an important weapon in air defense battle. But there are also short-comings of air defense artillery system. One is that there is a certain time delay of data transmission between the fire control command system and combat units. The high speed target will move a long distance within the period of delay. If not to com-pensate the delay in data transmission process, it will not lead to the accurate shoot-ing. Another is that the communication equipment is vulnerable to be interferenced and destructed by enemy’s electronic warfare weapons in the complex electromag-netic environment of battlefield. If a reliable means of communication do not be tak-en, it will make air defense artillery system can not play a role in the modern war en-vironment.According to the analysis above, put forward a battlefield data transmission sys-tem based on 2B+D with time-delay marking(measuring). The system is comprised by communication network controller and communication control card. Communica-tion network controller has the function of measuring time-delay, and transmitting data by 2B+D wired communication mode which ensures communication reliability. Communication control card connects with computer through the PC/104 bus inter-face. It receives the 2B+D signal from the communication network controller, and bridges the 2B+D interface and PC/104 bus interface.According to the requirements above, come up with the design plan of commu-nication network controller based on FPGA+DSP and the design plan of communica-tion control card based on FPGA. PCB boards was made after the work above. In or-der to reuse of the hardware design, make it easier to modify the design plan in the future and save the cost of modifications, communication network controller board was designed based on the core board and the bottom board.Based on completing hardware design and PCB boards, finish FPGA logic de-sign of the communication network controller and communication control card. With the FPGA, communication network controller has the function of the serial data transmission, ST-BUS data transmission for 2B+D communication, CMX649 initial- ization and voice communication, communicating with DSP by uPP interface, meas-uring the time delay of data frame transmitted through the equipment by UART or 2B+D module, status indication and DSP operation state detection. In addition to parts of the 2B+D communication and voice communication, communication control card FPGA logic design achieves the function of CPU communication by PC/104 bus. This paper described the module design process and gave the necessary verification by the simulation diagram and state diagram.After finishing the design of hardware and software of the system, debug the system and testing the function and performance. Functional verification test includes data transmission function verification, data and voice transmission function verifica-tion, and device link status indicator function verification. The performance test in-cludes data transmission error byte rate and time delay measuring precision test. This paper introduced the principle, method of the test and necessary analysis. Through the experiment, verify the system has the basic communication function. Meanwhile, the system error byte rate and delay estimation precision meet the design require-ments.Finally, the work of system design and verification was summarized and a future outlook was made.