caa a22 4500 606206302 CHVBK 20210128101011.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s00034-014-9915-1 doi (NATIONALLICENCE)springer-10.1007/s00034-014-9915-1 Reducing the Dissipated Energy in Multi-standard Turbo and LDPC Decoders [Elektronische Daten] [Carlo Condo, Amer Baghdadi, Guido Masera] Parallel Low-Density Parity-Check and turbo code decoding consists of iterative processes that rely on the exchange of messages among multiple processing elements (PEs). They are characterized by complex communication patterns that require area expensive interconnect and memory management. Channel decoders based on Networks-on-Chip (NoCs) have been proposed in the literature, showing unmatched degrees of flexibility, but yielding high area occupation and power consumption. While general and application-specific power reduction techniques are available to save energy, the gap with respect to dedicated decoders is still large. This paper proposes techniques that reduce and optimize the traffic on the network for NoC-based channel decoders, and can be applied to any NoC architecture. The proposed techniques exploit the probabilistic nature and the processing order of the exchanged messages in the iterative decoding and define novel importance and urgency metrics. Given a target throughput, these techniques allow to consistently reduce and optimize the NoC traffic with minor or no bit error rate (BER) degradation with respect to a decoder with no traffic optimization. An already available NoC-based decoder enhanced with the proposed traffic shaping techniques leads to 13.1% area overhead and 15.0% power and energy reduction, while 40.2% of power is saved on the NoC alone. Springer Science+Business Media New York, 2014 LDPC nationallicence Turbo nationallicence Decoder nationallicence Multi-standard nationallicence Low power nationallicence Condo Carlo Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy aut Baghdadi Amer Telecom Bretagne, Technopole Brest-Iroise, 29238, Brest Cedex 3, France aut Masera Guido Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy aut Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/5(2015-05-01), 1571-1593 0278-081X 34:5<1571 2015 34 34 https://doi.org/10.1007/s00034-014-9915-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00034-014-9915-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Condo Carlo Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy aut NATIONALLICENCE 700 1- Baghdadi Amer Telecom Bretagne, Technopole Brest-Iroise, 29238, Brest Cedex 3, France aut NATIONALLICENCE 700 1- Masera Guido Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy aut NATIONALLICENCE 773 0- Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/5(2015-05-01), 1571-1593 0278-081X 34:5<1571 2015 34 34