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Alternative Approximation of Check Node Algorithm for DVB-S2 LDPC Decoder

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2 Author(s)
Eljamaly, O. ; Technol. Ltd., Abingdon ; Sweeney, P.

In this paper, a new approximation of the check node rule algorithm is proposed for updating the check nodes messages in LDPC decoding. The new technique evaluates the check node min-sum magnitude algorithm using the Taylor series and results in reduced computational complexity and hardware implementation. The architecture of a check node processing unit, implementing the new alternative approximation of the check node, is also presented. The proposed method can achieve the same BER performance with a reduction of ~20% hardware complexity in the LDPE decoder. The simulation results obtained shows that the packet error rate performance of 10-7, which is the DVB-S2 requirement for MPEG packets transmitted, can be achieved with this new method.

Published in:

Systems and Networks Communications, 2007. ICSNC 2007. Second International Conference on

Date of Conference:

25-31 Aug. 2007