Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article New Technique for Improving Performance of LDPC Codes in the Presence of Trapping S | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 362897 12 pages doi 2008 362897 Research Article New Technique for Improving Performance of LDPC Codes in the Presence of Trapping Sets Esa Alghonaim 1 Aiman El-Maleh 1 and Mohamed Adnan Landolsi2 1 Computer Engineering Department KingFahd University of Petroleum Minerals Dhahran 31261 Kingdom of Saudi Arabia 2 Electrical Engineering Department KingFahd University of Petroleum Minerals Dhahran 31261 Kingdom of Saudi Arabia Correspondence should be addressed to Esa Alghonaim Received 2 December 2007 Revised 18 February 2008 Accepted 21 April 2008 Recommended by Yonghui Li Trapping sets are considered the primary factor for degrading the performance of low-density parity-check LDPC codes in the error-floor region. The effect of trapping sets on the performance of an LDPC code becomes worse as the code size decreases. One approach to tackle this problem is to minimize trapping sets during LDPC code design. However while trapping sets can be reduced their complete elimination is infeasible due to the presence of cycles in the underlying LDPC code bipartite graph. In this work we introduce a new technique based on trapping sets neutralization to minimize the negative effect of trapping sets under belief propagation BP decoding. Simulation results for random progressive edge growth PEG and MacKay LDPC codes demonstrate the effectiveness of the proposed technique. The hardware cost of the proposed technique is also shown to be minimal. Copyright 2008 Esa Alghonaim et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Forward error correcting FEC codes are an essential component of modern state-of-the-art digital communication and storage systems. Indeed in .
