A cross-layer diversity technique for multicarrier OFDM multimedia networks.
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.
Chan
Yee Sin
YS
Department of Electrical and Computer Engineering, University of California at San Diego, La Jolla, CA 92093-0407, USA. chanys@ieee.org
Cosman
Pamela C
PC
Milstein
Laurence B
LB
D000465:Algorithms; D003195:Computer Communication Networks; D003196:Computer Graphics; D044962:Data Compression / Q000379:methods* / Q000592:standards; D007089:Image Enhancement / Q000379:methods* / Q000592:standards; D007090:Image Interpretation, Computer-Assisted / Q000379:methods* / Q000592:standards; D019212:Multimedia; D010781:Photography / Q000379:methods / Q000592:standards; D015983:Selection Bias; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D014741:Video Recording / Q000379:methods* / Q000592:standards