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New Combinatorial Construction Techniques for Low-Density Parity-Check Codes and Systematic Repeat-Accumulate Codes

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2 Author(s)
Alexander Gruner ; Wilhelm Schickard Institute for Computer Science, Eberhard Karls Universitat Tubingen, Sand 13, D-72076 Tubingen, Germany ; Michael Huber

This paper presents several new construction techniques for low-density parity-check (LDPC) and systematic repeat-accumulate (RA) codes. Based on specific classes of combinatorial designs, the improved code design focuses on high-rate structured codes with constant column weights 3 and higher. The proposed codes are efficiently encodable and exhibit good structural properties. Experimental results on decoding performance with the sum-product algorithm show that the novel codes offer substantial practical application potential, for instance, in high-speed applications in magnetic recording and optical communications channels.

Published in:

IEEE Transactions on Communications  (Volume:60 ,  Issue: 9 )