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Dynamic Power Management for the Iterative Decoding of Turbo Codes

Abstract : Turbo codes are presently ubiquitous in the context of mobile wireless communications among other application domains. A decoder for such codes is typically the most power intensive component in the base- band processing chain of a wireless receiver. The iterative nature of these decoders represents a dynamic workload. This brief presents a dynamic power management policy for these decoders. An algorithm is proposed to tune a power manageable decoder according to a prediction of the work- load involved within the decoding task. By reclaiming the timing slack left when operating the decoder at a high power mode, the proposed algorithm continuously looks for opportunities to switch to a lower power mode that guarantees the task completion. We apply this technique to an long term evolution Turbo decoder and explore the feasibility of a VLSI implementa- tion on a CMOS technology of 65 nm. Energy savings of up to 54% were achieved with a relatively low loss in error-correction performance.
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Contributor : Renaud Pacalet Connect in order to contact the contributor
Submitted on : Wednesday, July 8, 2020 - 8:44:17 AM
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Erick Amador, Raymond Knopp, Renaud Pacalet, Vincent Rezard. Dynamic Power Management for the Iterative Decoding of Turbo Codes. IEEE Transactions on Very Large Scale Integration (VLSI) Systems, IEEE, 2012, 20 (11), pp.2133-2137. ⟨10.1109/TVLSI.2011.2167765⟩. ⟨hal-02893084⟩



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