| Publisher | University of California | ||
|---|---|---|---|
| Format | 138.6KB PDF | Date added | 11 Apr 2007 |
| Topics | Wireless LAN, Multimedia, Mobile - Wireless Communications | ||
| Downloads | 64 | ||
Diversity can be used to combat multipath fading and improve the performance of mobile wireless multimedia communication systems. In this work, by considering transmission of an embedded bitstream over a slow varying Rayleigh faded environment, the authors develop a cross-layer diversity technique which takes advantage of both multiple description source coding and frequency diversity techniques. More specifically, assuming a frequency-selective channel, this paper studies the packet loss behavior of an OFDM system and constructs multiple independent descriptions using an FEC-based strategy. The paper demonstrates the superior performance of this approach using the Set Partitioning In Hierarchical Trees (SPIHT) coder.
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