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 language | English (US) |
|---|---|
| Pages (from-to) | 473-482 |
| Number of pages | 10 |
| Journal | IEEE Workshop on Signal Processing Systems, SiPS: Design and Implementation |
| State | Published - 1999 |
| Event | 1999 IEEE Workshop on SiGNAL Processing Systems (SiPS 99): 'Design and Implementation' - Taipei, Taiwan Duration: Oct 20 1999 → Oct 22 1999 |
ASJC Scopus subject areas
- General Engineering