摘要
首先对B码信号进行了详细地码型介绍和理论分析,然后提出了一种利用嵌入式技术来提取B码信号中同步脉冲的方法。该设计的核心部分是一片CPLD芯片,其内部实现了B码同步脉冲上升延的提取,脉冲宽度调制等功能。对设计过程中出现的关键问题,如脉冲宽度检测和毛刺信号的消除,本文提出了解决方法,并给出了仿真结果。与传统的方法相比,该设计方案具有精度高,体积小,成本低,工作稳定等优点。
The IRIG - B code is a kind of signal for time unification , and there are lots of time information included in it . Based on deep study on IRIG - B code, a new method that is used to draw signal of synchronous pulse based on embedded technology is presented. The core part in the design is a complex programmable logic device, in which drawing of synchronous pulse and modulation of pulse width is realized. Some key problems have appeared in the course of design , such as how to measure pulse width and remove interfering signal . To these key technologies the solutions are proposed with emulation results given. The result shows that it has lots of advantages such as higher precisions , smaller size, lower costs and the more reliable stability compared with traditional method . So this new method can Totally replace the part in traditional device.
出处
《航空计算技术》
2005年第3期113-116,共4页
Aeronautical Computing Technique
