CDMA secure coding and decoding method and system

• Main Authors: CHEN GUANG, ZHANG FUSONG, YANG GUANGLUN, WANG GUOYING, LYU XIANLIANG, XU YANWEN, SUN ZHENYU, LI XUEJIAN, ZHANG SHENGWEN, DING HUAN, SUN GUOYING, YE FENG
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2021
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

The invention provides a code division multiple access (CDMA) secure coding and decoding method and system, and the CDMA secure coding method comprises the steps: receiving a first clock signal, and converting the first clock signal into an analog signal; receiving a data signal and a second clock signal, and performing differential double-phase coding on the data signal to obtain a coded digital signal; conditioning and amplifying the analog signal, and coupling the analog signal with the coded digital signal to obtain a required baseband signal; coding the baseband signal to obtain a baseband coded signal; and performing CDMA coding on the baseband coding signal to obtain a CDMA coding signal. According to the CDMA safe coding and decoding method and system, interconnection and intercommunication of European railway operation control systems can be met, and the problems that an existing European train operation control system is poor in anti-interference performance, only suitable for short-distance transmi