Energy Efficient Reed-Solomon Error Correction

Abstract

Energy efficient implementations are very important in order to increase the op- erating time for battery-powered devices. In this thesis a Reed-Solomon encoder and decoder have been implemented. The implementations have been synthesized using a 45nm technology library and power estimations have been performed. To find the most energy efficient implementation, several implementation techniques were evaluated. The implemented system is a 5-bit, RS(31, 27) code. For a Reed- Solomon encoder with low activity, the energy consumption can be reduced by over 40% with the use of clock gating. Several different Reed-Solomon decoder configurations were implemented and synthesized. When comparing the energy consumption of the different configurations, a configuration with two-parallel syn- drome cells and pipelined Chien search, Forney and error correction module were found to be the most energy efficient. This configuration had a 36% lower energy consumption compared to a configuration with the same parallel syndrome cells, and no pipelined modules. It also had a 7% lower energy consumption compared to a configuration with the same pipelined modules and the standard syndrome cells.