A cross-layer diversity technique for multicarrier OFDM multimedia networks

作者：Chan YS^*; Cosman PC; Milstein LB

来源：IEEE Transactions on Image Processing, 2006, 15(4): 833-847.

DOI：10.1109/TIP.2005.863967

• cross-layer design
• diversity
• frequency diversity
• multimedia communications
• multiple description coding
• orthogonal frequency division multiplexing (OFDM)
• progressive transmission
• wireless video

Diversity can be used to combat multipath fading and improve the performance of wireless multimedia communication systems. In this work, by considering transmission of an embedded bitstream over an orthogonal frequency division multiplexing (OFDM) system in a slowly varying Rayleigh faded environment, we develop a cross-layer diversity technique which takes advantage of both multiple description coding and frequency diversity techniques. More specifically, assuming a frequency-selective channel, we study the packet loss behavior of an OFDM system and construct multiple independent descriptions using an FEC-based strategy. We provide some analysis of this cross-layer approach and demonstrate its superior performance using the set partitioning in hierarchical trees image coder.

• 出版日期2006-4