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A dual-function mixed-signal circuit for LDPC encoding/decoding
- Source :
-
Integration: The VLSI Journal . Jun2009, Vol. 42 Issue 3, p332-339. 8p. - Publication Year :
- 2009
-
Abstract
- Abstract: We present a low power, dual-function encode/decode circuit for a class of reversible low-density parity-check codes. The circuit offers a small silicon footprint, by operating as an analog decoder and reusing resources to switch into a digital encode mode. In order to achieve this behaviour from a single circuit we have developed mode-switching gates. These logic gates are able to switch between analog (soft) and digital (hard) computation. Only a small overhead in circuit area is required to transform the analog decoder into a full codec. The encode operation can be performed two orders of magnitude faster than the decode operation, making the circuit suitable for full-duplex applications. The low power and small area of the circuit make it an attractive option for battery powered wireless devices. Circuit simulations indicate a decoding latency of with negligible SNR loss with respect to digital sum–product decoders. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 01679260
- Volume :
- 42
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Integration: The VLSI Journal
- Publication Type :
- Academic Journal
- Accession number :
- 38317417
- Full Text :
- https://doi.org/10.1016/j.vlsi.2008.09.006