Abstract
We propose a 4G system for transmission of video from a server at the base station to numerous wireless clients. We employ the latest technology in scalable video compression (3-D wavelet video coding) and in channel coding (punctured turbo codes); for the physical layer, we resort to the multicarrier chip-interleaved system with two-layer interleaving, which achieves high spectral efficiency and is very suitable for downlink applications. We develop fast algorithms for a cross-layer resource allocation that minimize the expected distortion of the reconstructed video averaged over all clients. The algorithms find a near-optimal power, bandwidth, and subcarrier allocation at the physical layer and a source-channel symbol allocation at the application layer. Our experimental results demonstrate that such a cross-layer optimization framework leads to higher quality performance of the overall system.
Original language | English |
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Pages (from-to) | 143-158 |
Number of pages | 16 |
Journal | Wireless Communications and Mobile Computing |
Volume | 7 |
Issue number | 2 |
Early online date | 23 Jan 2007 |
DOIs | |
Publication status | Published - Feb 2007 |
Keywords
- 4G systems
- video multicast
- scalable video
- multicarrier
- resource allocation