ITR Collaborative Research: Toward Practical Graph-Based Coding Schemes For Reliable Wireless Communications

该项目侧重于数字通信系统设计的物理层-特别是针对噪声，衰落信道（如无线通信系统中遇到的信道）的基于图形的错误控制编码技术的设计。该研究解决了那些使基于图的编码技术的实际实现存在问题的问题。这些问题包括：LDPC和适合高速实现的代数结构turbo码的开发。开发了具有中等块长度的LDPC和turbo码，适合于实际的实时应用。带宽高效编码调制方案的设计结合了这些新的代码结构，以便在高数据速率应用中“充实比特管道”。对这些新的编码方案进行调整，以便在以无线信道为特征的衰落环境中使用。

This project focuses on the physical layer of digital communicationsystem design - in particular on the design of graph-based errorcontrol coding techniques for noisy, fading channels, such as thoseencountered in wireless communication systems. The researchaddresses those issues that have made practical implementation ofgraph-based coding techniques problematic. Those issues include:The development of LDPC and turbo codes with algebraic structure,suitable for high speed implementation.The development of LDPC and turbo codes with moderate block length,suitable for practical real-time applications.The design of bandwidth efficient coded modulation schemesincorporating these new code constructions in order to "fatten thebit pipe" in high data rate applications.The adaptation of these new coding schemes for use in the fadingenvironment that characterizes wireless channels.