基于EDA技术的HDB3编解码器设计与实现.doc

（ 二 〇 一 六 年 六 月 摘 要 为了弥补AMI码不能克服长连零导致的通信同步的问题，所以产生了HDB3码。这样编码很大程度上提高了编码传输中检错、纠错的能力，从而提高了数字基带信号的通信质量 。 本次设计是基于EDA技术的HDB3编码器的设计，以VHDL为语言工具，QuartusII软件为设计平台，以及搭建硬件电路完成了对HDB3编码器的设计。整个设计划分为3个模块，分别单独设计，最后3个模块级联后就实现了HDB3编码器。本设计说明书首先分别介绍了EDA技术与可编程器件、开发工具的使用概述和特点，对AMI码、HDB3码进行了重点阐述和分析，这对后续的设计起着重大作用。其次，通过对三种HDB3编码器的设计方案的对比分析，得出最佳方案。对HDB3编码器各个模块的实现基本原理和对VHDL语言的编码思想进行了详细的介绍，同时描述了对模块功能的流程图的设计，通过波形仿真的方式来验证各个模块的功能。最后通过软件仿真、硬件电路测试的方式来验证本次设计的HDB3编码器的正确性、合理性。从仿真的结果可以看出整个设计基本完成了HDB3编码器的设计，但输出相对于输出有时钟脉冲上了延时。 关键词：HDB3；VHDL；编码器；QuartusII软件  Abstract In order to make up for the AMI code can not overcome the long even zero lead to the problem of communication synchronization, so generated HDB3 code. This code to a large extent improve the coding for data transmission error detection and error correction ability, so as to improve the quality of the digital baseband signal communication. This design is based on the EDA technology of the HDB3 encoder design, with VHDL as the language tool, QuartusII software for the design platform, as well as to build a hardware circuit to complete the design of the HDB3 encoder. The whole design is divided into 3 modules, which are separately designed, and the last 3 modules are cascaded to implement the HDB3 encoder. The design specification are first introduced EDA technology and device programming, development tools using the overview and characteristics, the AMI code and HDB3 code has carried on the key elaboration and analysis of, which the subsequent design plays a major role. Secondly, through the comparative analysis of the design scheme of the three kinds of HDB3 encoder, the optimal scheme is obtained. Each module of the HDB3 encoder to achieve basic principle and of VHDL code method are introduced in detail, and describes the flow chart of the function module design, through the simulation waveform to verify the function of each module. Finally through the