| Paper: | SPCOM-P10.9 | ||
| Session: | Multi-Carrier Systems | ||
| Time: | Thursday, May 18, 16:30 - 18:30 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing for Communication: Multi-carrier, OFDM, and DMT communication | ||
| Title: | Power-Efficient OFDM with Reduced Complexity and Feedback Overhead | ||
| Authors: | Antonio Marques, Rey Juan Carlos University, Spain; Fadel Digham, Georgios Giannakis, University of Minnesota, United States | ||
| Abstract: | Responding to the increasing demand for low-cost low-power wireless sensor networks and related applications, we develop simple, yet suboptimal, bit and power loading algorithms that minimize transmit-power for orthogonal frequency division multiplexing (OFDM) under rate and error probability constraints. This bit and power loading adaptation is based on quantized version of channel state information (CSI) conveyed from the receiver to the transmitter. In addition, our design exploits the correlation among sub-carriers in order to reduce feedback overhead. Numerical examples advocate our claims that simple suboptimal schemes with even reduced number of feedback bits still achieve significant power savings. | ||
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