Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14026
Title: Performance evaluation of irregular low-density parity-check codes at high signal-to-noise ratio
Authors: Zheng, X
Lau, FCM 
Tse, CK 
Issue Date: 2011
Source: IET Communications, 2011, v. 5, no. 11, p. 1587-1596 How to cite?
Journal: IET Communications 
Abstract: Elementary trapping sets (ETSs) have been found to be the main cause of error floor in the decoding of low-density parity-check (LDPC) codes. Moreover, irregular LDPC codes that avoid harmful [w; u; e] ETSs have been constructed and have shown to possess superior error performance compared with other LDPC codes. In this paper, we attempt to evaluate irregular LDPC code performance under an additive white Gaussian noise channel within the high SNR region using the importance sampling (IS) approach in conjunction with the identification of [w; u; e] ETSs. For any given irregular LDPC code, we will first apply a three-step method that aims to search as many ETSs within the code as possible. Then, we will classify these ETSs into different groups based on their labels, i.e., [w; u; e]'s. Further, by dividing the error region into various sub-regions centered by ETSs, we apply the IS simulator to evaluate the error rate of each of the sub-regions. Based on the error rates of all the sub-regions, we can estimate the overall error rate of the LDPC code. Results have indicated that our proposed IS scheme can produce speed-up gains up to 3.9×109 times compared to Monte Carlo simulations.
URI: http://hdl.handle.net/10397/14026
ISSN: 1751-8628
DOI: 10.1049/iet-com.2010.0741
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