Based on the "Experimental Simulation" Digital Base Band Transmission Common Code Analysis

The digital baseband signal is a low-frequency signal with a digital feature, this signal cannot be transmitted in the channel of the band pass feature, however, if the base band signal want to be transmitted for the high quality cable channel and the distance of the wireless channel, you have to do a different transformation of the signal, the type that satisfies the base band characteristics is called the common code, the AMI code and the HDB3 code are one of the common types of base band transmission, in the case of actual code analysis, it is difficult for students to understand their coding rules, use the method of experiment and simulation, can better analyze and verify the principle and improve the teaching effect.