平调手台设备中发送FFSK信号的软件算法

Software Arithmetic of Sending FFSK Signal in Portable Shunting Unit

采用直接数字频率合成(DDFS)技术,实现数字信号转换成FFSK信号的软件方法,对常用DDFS技术进行改进,使其能够在通用型单片机上实现而无需占用太多资源。

The software method is introduced by employing DDFS technology to realize the transformation of digital signal into FFSK signal. The conventional DDFS technology is improved a lot to achieve its function on single chip micro-computer without using too much resources.