专用集成电路与系统国家重点实验室
讲座信息

题  目：Error floors of LDPC Codes and Its Lowering Techniques
报告人：Yeong-Luh Ueng （National Tsing Hua University, Hsinchu, Taiwan）
时  间：2011年1月17日14:00-15:00
地  点：张江校区微电子楼269室

Abstract
    Low-density parity-check (LDPC) codes were originally proposed by Gallager in his famous Ph.D. thesis of 1960. However, the power of LDPC codes could not be fully demonstrated due to limitations in computational resources in the 1960s. As a result, LDPC codes had slipped for a long time. It was demonstrated in the mid 1990s by MacKay that LDPC codes can achieve near-capacity performance. LDPC codes had been adopted in many applications for both communication and storage systems. For wired communications and storage systems, LDPC codes with low error floors are required. For example, a BER of 10^-13 is usually required for these applications. In this talk, we will give a brief introduction to the causes for the error floors of LDPC codes and its lowering techniques.

Biography
    Yeong-Luh Ueng received the Ph.D. degree in communication engineering from the National Taiwan University, Taipei, Taiwan, in 2001. From 2001 to 2005, he was with a private communication technology company, where he focused on the design and development of various wireless chips. Since December 2005, he has been a member of the faculty of the National Tsing Hua University, Hsinchu, Taiwan, where he is currently an Associate Professor with the Department of Electrical Engineering and the Institute of Communications Engineering. His research interests include coding theory, wireless communications, and communication ICs. He has published 16 IEEE journal papers including 15 full papers. He also has presented 18 technical contributions related to the IEEE 802.16 standard. He was also invited to speak at the 6th International Symposium on Turbo Codes & Iterative Information Processing, one of the most well-known symposiums in the area of error correction coding. He was elected as an honorary member of the Phi Tau Phi Scholastic Honor Society, and he is currently an IEEE member.