Abstract
We present a general optimization method of rate allocation for embedded image sources over fading channels under unequal error protection (UEP). 2-state Markov chain or Gilbert-Elliott (G-E) channel models are exploited to approximate slowly fading channels in wireless communications in which each state corresponds to a binary symmetric channel (BSC). Under the assumption that exact knowledge of channel state information (CSI) is not available, the partition of the bit stream, the allocation of source/channel coding rate, and the number of protection levels for UEP schemes are all optimized by using the statistics of the G-E models and maximization of the expected error-free source bit stream length. Experiment results lead to different rate allocation strategies from previous ones in some channel conditions and the performance improvement is up to 0.4 dB.
Original language | English (US) |
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Pages (from-to) | 479-483 |
Number of pages | 5 |
Journal | IEEE Vehicular Technology Conference |
Volume | 2 |
Issue number | 52 ND |
State | Published - Dec 1 2000 |
All Science Journal Classification (ASJC) codes
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering