Publications – Details
Highly Flexible Design of Multi-Rate Multi-Length Quasi-Cyclic LDPC Codes
- Authors:
- Moritz Beermann, Florian Wickert, and Peter Vary
- Book Title:
- 8th International Symposium on Turbo Codes and Iterative Information Processing
- Event Date:
- 18.-22.8.2014
- Organization:
- IEEE
- Date:
- Aug. 2014
- Language:
- German
Abstract
The design of Low-Density Parity-Check (LDPC) codes with fixed code rate and block length for a fixed channel condition has been well investigated and very close-to-capacity performance can be achieved by careful optimization of a code's degree distributions. The growing variety of services supported by mobile communication systems, however, constitutes the need for highly flexible Forward Error Correction (FEC) schemes. Pursuing this need, we present a design method for the construction of quasi-cyclic (QC) LDPC codes supporting arbitrarily many block lengths and code rates using only a single common mother code. Different block lengths are achieved by an optimized expansion of the mother code's lifting matrix. For the support of multiple code rates, a joint optimization of shortening and puncturing distributions as well as an optimized check matrix construction based on the progressive edge-growth algorithm is employed.
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