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The purpose of this paper is to develop an information-theoretic understanding of the tradeoffs between decoder power, probability of error and decoding throughput. We start by considering the power consumed in the decoder circuit's interconnects, modeled as a lumped capacitor and resistor. After making simplifying assumptions about the decoder circuit, we use a sphere-packing technique to lower bound the decoding error probability for a given number of clock-cycles (or iterations). The analysis can be used to give lower bounds on probability of error versus total decoding power at a fixed decoding throughput.
Date of Conference: 13-18 June 2010