一种使用VHDL语言实现HDB3编码的方法

HDB3码因具有无直流成分，低频成分少和连0的个数不超过三个等明显优点而成为数字基带通信中最常用的码型。同时，由于硬件描述语言VHDL可读性强，可移植性强，支持对大规模设计的分解和对己已有设计的再利用等强大功能。现在已经在通信电路设计上得到广泛应用，文中结合HDB3的编码规则，给出了一种使用VHDL语言实现HDB3编码的思路和方法。

A New Method Using VHDL Language to Code the HDB3

The HDB3 code, for in no direct current components, less lower frequency components and no more than three continuous zreos, has become the most common-use code in digit-baseband communication, Because of its strong readability, portability, reuse of the existing design and support in resolvability of the large scale design, the hardware describing language VHDL has been widely used in communication circuit design. Combining the rules of coding the HDB3, this paper gives a new method using the VHDL language to code the HDB3.