基于单片机的罗兰-C导航系统信号发生器设计

根据罗兰-C信号的基本特征,以单片机为主体,利用查表方式输出数字量,再经过DA转换模拟产生罗兰-C导航系统标准信号.输出信号包含了该台链中主台和副台的完整信号,另外针对导航台发射信号的环境,还添加了天波信号,同频干扰信号,噪声等干扰信号.信号发生程序完全按照主副台发射标准,以及奇偶周期的不同相位编码,对输出的脉冲进行时间上和相位上的控制.

A Signal Generator Design of the Loran-C Navigation System Based on Single Chip Microcomputer

According to the basic characteristics of Loran-C signal, this paper by single chip microcomputer as the main body, using look-up table method for digital output, then take DA conversion to produce the standard signal of the Loran-C navigation system. The output signal contains a master station and slave station in the station chain the integrity of the sig- nal, in addition to beacon signal environment, we also added sky wave signal and the same frequency interference signals and the noise jamming signal, etc. The program completely according to the main station and signal emission standards, as well as the odd cycle of different phase encoding, so it can take the time and phase control of the output pulse.