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Design of multi-edge-type bilayer-expurgated LDPC codes for decode-and-forward in relay channels

Azmi, Marwan H. and Jinhong, Yuan and Lechner, Gottfried and Rasmussen, Lars K. (2011) Design of multi-edge-type bilayer-expurgated LDPC codes for decode-and-forward in relay channels. IEEE Transactions on Communications, 59 (11). pp. 2993-3006. ISSN 0096-6778

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Abstract

We consider the design of bilayer-expurgated low- density parity-check (BE-LDPC) codes as part of a decode- and-forward protocol for use over the full-duplex relay chan- nel. A new ensemble of codes, termed multi-edge-type bilayer- expurgated LDPC (MET-BE-LDPC) codes, is introduced where the BE-LDPC code design problem is transformed into the problem of optimizing the multinomials of a multi-edge-type LDPC code. We propose two design strategies for optimizing MET-BE-LDPC codes; the bilayer approach is preferred when the difference in SNR between the source-to-relay and the source- to-destination channels is small, while the bilayer approach with intermediate rates is preferred when this difference is large. In both proposed design strategies multi-edge-type density evolution is used for code optimization. The resulting MET-BE-LDPC codes exhibit improved threshold and bit-error-rate performance as compared to previously reported bilayer LDPC codes.

Item Type:Article
Uncontrolled Keywords:Multi-edge type LDPC codes, bilayer LDPC codes, density evolution, decode-and-forward, relay channel
Subjects:T Technology > TC Hydraulic engineering. Ocean engineering
Divisions:Electrical Engineering
ID Code:44836
Deposited By: Haliza Zainal
Deposited On:21 Apr 2015 11:31
Last Modified:31 Jan 2017 14:13

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