Trade-offs between Error Exponents and Excess-Rate Exponents of Typical Slepian–Wolf Codes

Typical random codes (TRCs) in a communication scenario of source coding with side information in the decoder is the main subject of this work. We study the semi-deterministic code ensemble, which is a certain variant of the ordinary random binning code ensemble. In this code ensemble, the relativel...

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Vydáno v:Entropy (Basel, Switzerland) Ročník 23; číslo 3; s. 265
Hlavní autoři: Tamir (Averbuch), Ran, Merhav, Neri
Médium: Journal Article
Jazyk:angličtina
Vydáno: Switzerland MDPI 24.02.2021
MDPI AG
Témata:
error exponent
excess-rate exponent
Slepian–Wolf coding
typical random code
variable-rate coding
typical random code
variable-rate coding
excess-rate exponent
error exponent
Slepian–Wolf coding
ISSN:1099-4300, 1099-4300
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Popis
Shrnutí:Typical random codes (TRCs) in a communication scenario of source coding with side information in the decoder is the main subject of this work. We study the semi-deterministic code ensemble, which is a certain variant of the ordinary random binning code ensemble. In this code ensemble, the relatively small type classes of the source are deterministically partitioned into the available bins in a one-to-one manner. As a consequence, the error probability decreases dramatically. The random binning error exponent and the error exponent of the TRCs are derived and proved to be equal to one another in a few important special cases. We show that the performance under optimal decoding can be attained also by certain universal decoders, e.g., the stochastic likelihood decoder with an empirical entropy metric. Moreover, we discuss the trade-offs between the error exponent and the excess-rate exponent for the typical random semi-deterministic code and characterize its optimal rate function. We show that for any pair of correlated information sources, both error and excess-rate probabilities exponential vanish when the blocklength tends to infinity.
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ISSN:1099-4300
1099-4300
DOI:10.3390/e23030265