对可见光通信中怎样减少背景光干扰的研究，并使用NRZI编码。-We demonstrate that non-return-to-zero-inverted (NRZI) code reduces the background optical interference effectively in low frequency band. The comparison between nonreturn- to-zero (NRZ) code and NRZI code was per

USB 2.0 协议详细介绍，USB系统描述，NRZI编码描述，USB 信息包等描述-USB2.0

nrzi编码的文档，介绍了zi编码的原理，使用方法和usb相关知识-nrzi encoded documents introduced zi coding theory, the use of methods and knowledge usb