说明：  首先，认识标准。从系统层面和物理层两方面介绍此标准，给出标准的发送端和接收端系统结构框图，重点描述标准中物理层的特征，总结出标准的重要特点和关键技术。 其次，研宄和实现两种编码器。根据标准中码矩阵的特点，设计一种高效的编码器，完成的实现。在此基础上提出一种新的编码结构一旋转码，对旋转编码器结构进行探究，完成它的仿真和实现。
(First of all, recognize the standard. This paper introduces the standard from two aspects of system level and physical layer, gives the system structure diagram of sender and receiver, focuses on the characteristics of physical layer in the standard, and summarizes the important characteristics and key technologies of the standard. Secondly, two kinds of encoders are studied and implemented. According to the characteristics of the standard code matrix, an efficient encoder is designed and implemented. On this basis, a new encoding structure, rotary code, is proposed. The structure of rotary encoder is explored, and its simulation and implementation are completed.)