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Mathematics and Engineering Communications Laboratory
 

Summary: Mathematics and Engineering
Communications Laboratory
Technical Report
On the Joint Source-Channel Coding Excess Distortion
Exponent for Memoryless Continuous-Alphabet Systems
Y. Zhong, F. Alajaji, and L. L. Campbell
July 2008
1
On The Joint Source-Channel Coding Excess Distortion
Exponent for Memoryless Continuous-Alphabet Systems
Yangfan Zhong Fady Alajaji L. Lorne Campbell
Abstract
We investigate the joint source-channel coding (JSCC) excess distortion exponent EJ (the exponent
of the probability of exceeding a prescribed distortion level) for memoryless communication systems
with continuous alphabets. We first establish upper and lower bounds for EJ for systems consisting
of a memoryless Gaussian source under the squared-error distortion fidelity criterion and a memoryless
additive Gaussian noise channel with a quadratic power constraint at the channel input. A necessary
and sufficient condition for which the two bounds coincide is provided, thus exactly determining the
exponent. This condition is observed to hold for a wide range of source-channel parameters. The
problem of transmitting memoryless Laplacian sources over the Gaussian channel under the magnitude-

  

Source: Alajaji, Fady - Department of Mathematics and Statistics, Queen's University (Kingston)
Linder, Tamás - Department of Mathematics and Statistics, Queen's University (Kingston)

 

Collections: Engineering