 
Summary: Mathematics and Engineering
Communications Laboratory
Technical Report
Coding Error Exponents for Asymmetric TwoUser
Discrete Memoryless SourceChannel Systems
Y. Zhong, F. Alajaji, and L. L. Campbell
March 2007
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Coding Error Exponents for Asymmetric TwoUser
Discrete Memoryless SourceChannel Systems
Yangfan Zhong Fady Alajaji L. Lorne Campbell
Abstract
Consider transmitting two discrete memoryless correlated sources, consisting of a common and a pri
vate source, over a discrete memoryless multiterminal channel with two transmitters and two receivers.
At the transmitter side, the common source is observed by both encoders but the private source can
only be accessed by one encoder. At the receiver side, both decoders need to reconstruct the common
source, but only one decoder needs to reconstruct the private source. We hence refer to this system
by the asymmetric 2user sourcechannel system. In this work, we derive a universally achievable joint
sourcechannel coding (JSCC) error exponent pair for the 2user system by using a technique which
generalizes Csisz´ar's method [8] for the pointtopoint (singleuser) discrete memoryless sourcechannel
