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2008

Source fidelity over fading channels: performance of erasure and scalable codes

11 years 11 months ago
Source fidelity over fading channels: performance of erasure and scalable codes
We consider the transmission of a Gaussian source through a block fading channel. Assuming each block is decoded independently, the received distortion depends on the tradeoff between quantization accuracy and probability of outage. Namely, higher quantization accuracy requires a higher channel code rate, which increases the probability of outage. We first treat an outage as an erasure, and evaluate the received mean distortion with erasure coding across blocks as a function of the code length. We then evaluate the performance of scalable, or multi-resolution coding in which coded layers are superimposed within a coherence block, and the layers are sequentially decoded. Both the rate and power allocated to each layer are optimized. In addition to analyzing the performance with a finite number of layers, we evaluate the mean distortion at high Signal-toNoise Ratios as the number of layers becomes infinite. As the block length of the erasure code increases to infinity, the received disto...
Konstantinos E. Zachariadis, Michael L. Honig, Agg
Added 29 Dec 2010
Updated 29 Dec 2010
Type Journal
Year 2008
Where TCOM
Authors Konstantinos E. Zachariadis, Michael L. Honig, Aggelos K. Katsaggelos
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