Low-power multimedia communication system for indoor wireless applications

Manish Goel, Swaroop Appadwedula, Naresh R Shanbhag, Kannan Ramchandran, Douglas L Jones

Research output: Contribution to journalArticle

Abstract

A low-power multimedia communication system is proposed. Power reductions are achieved by employing dynamic algorithm transforms and joint source-channel coding to reconfigure the system in the presence of variabilities in source and channel data. Configuration parameters are source rate, error correction capability of the channel encoder/decoder, number of powered-up fingers in the RAKE receiver and transmit power of the power amplifier. Energy-optimum configurations are obtained by minimizing energy consumption under the constraints of end-to-end distortion and total transmission rate. The proposed system is tested over a variety of images, distances (ranging from 2 to 100 meters) and multipath channels. Simulation results using 0.18 μm, 2.5 V CMOS parameters show that the reconfigurable system can achieve average energy savings of 59% as compared to a fixed system designed for the worst case. Also, the proposed system consumes 16% less energy as compared to a transmit-power-controlled system.

Original languageEnglish (US)
Pages (from-to)473-482
Number of pages10
JournalIEEE Workshop on Signal Processing Systems, SiPS: Design and Implementation
StatePublished - 1999

ASJC Scopus subject areas

  • Engineering(all)

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