Robust Initial LLRs for Iterative Decoders in Presence of Non-Gaussian Noise

Summary, in English

We consider the decoding of LDPC codes in presence of non-Gaussian noise, especially a set of ¿-mixture models. For each of these models, the optimal LLRs are presented. We study the performance degradation due to the use of incorrect LLR in presence of a given noise model. Without modifying the existing LDPC decoder, we propose robust initial LLR which require minimum knowledge about the underlying noise model and are computationally less complex. Since BER simulations are computationally heavy, we use density evolution to compare the thresholds of different LLRs.

• Författare: Arun Ayyar; Michael Lentmaier; K. Giridhar; Gerhard Fettweis
• Publiceringsår: 2009
• Språk: Engelska
• Sidor: 904-908
• Publikation/Tidskrift/Serie: 2009 IEEE International Symposium on Information Theory
• Fulltext: - 118 kB; Download statistics
• Länkar: http://dx.doi.org/10.1109/ISIT.2009.5205626
• Dokumenttyp: Konferensbidrag
• Förlag: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Ämne: Electrical Engineering, Electronic Engineering, Information Engineering
• Nyckelord: LDPC codes; robust LLR; non-Gaussian noise; impulsive noise
• Conference name: IEEE International Symposium on Information Theory (ISIT), 2009
• Conference date: 2009-06-28 - 2009-07-03
• Conference place: Seoul, Korea, Democratic People's Republic of
• Status: Published
• Forskningsgrupp: Telecommunication Theory
• ISBN/ISSN/Övrigt: ISBN: 978-1-4244-4312-3