High Rate QC-LDPC Codes with Optimization of Maximum Average Girth

Abstract

I. INTRODUCTION Nowadays, modern digital communication systems develop rapidly with larger capacity and high data rate to fulfill the requirement of mass multimedia information transmission and so on. One of such systems, the optical communication system, has several advantages, such as ultra larger capacity and better transmission channel, when compared with wireless and even the traditional cable communications. And it has been widely used for the long-haul transmission all over the world. But the reliability and effectiveness are still crucial for the optical communications. And effective measures are needed to