随机相位序列产生与实时检测系统

Producing and Real-time Detecting System for the Random Phasic Serial Signal based on CPLD

系统以CPLD为主控单元,参照红外通讯中的NEC标准,利用模拟限带噪声源产生随机相位序列信号,并依据就近解码原则,提出用容错距离对接收到的解调信号进行实时解码的方法。适用于安防系统中的红外、激光等传感器的光路加密。对主控单元稍作改动,可用作带硬件密钥的异步加密通讯、激光测距等。

The system adopts CPLD for the master part. It refers to NEC standard of infrared communication, and uses the analog limited bandwidth noise source to produce the radom phasic serial signal. On the principle of nearby decoding, the method of real-time decoding is brought forward, it uses the fault-tole distance to deal with the received demodulated signal. The system suits to encrypt the rays of the infrared sensor and the laser sensor in guard against theft system. If we change the master part slightly, it can be used for the laser range finder, the asynchronism communication with hardware secret key and so on.