7 citations · 14 across the 9 of their papers we have counts for
11 papers · 1 filter
A New Method for Employing Feedback to Improve Coding Performance
Aaron B. Wagner, Nirmal V. Shende, Yücel Altuğ
We introduce a novel mechanism, called timid/bold coding, by which feedback can be used to improve coding performance. For a certain class of DMCs, called compound-dispersion chann…
On exact asymptotics of the error probability in channel coding: symmetric channels
Yücel Altuğ, Aaron B. Wagner
The exact order of the optimal sub-exponentially decaying factor in the classical bounds on the error probability of fixed-length codes over a Gallager-symmetric discrete memoryles…
Minimax Rényi Redundancy
Semih Yagli, Yücel Altuğ, Sergio Verdú
The redundancy for universal lossless compression of discrete memoryless sources in Campbell's setting is characterized as a minimax Rényi divergence, which is shown to be equal to…
Refinement of the random coding bound
Yucel Altug, Aaron B. Wagner
An improved pre-factor for the random coding bound is proved. Specifically, for channels with critical rate not equal to capacity, if a regularity condition is satisfied (resp. not…
The third-order term in the normal approximation for singular channels
Yucel Altug, Aaron B. Wagner
For a singular and symmetric discrete memoryless channel with positive dispersion, the third-order term in the normal approximation is shown to be upper bounded by a constant. This…
Refinement of the Sphere-Packing Bound: Asymmetric Channels
Yucel Altug, Aaron B. Wagner
We provide a refinement of the sphere-packing bound for constant composition codes over asymmetric discrete memoryless channels that improves the pre-factor in front of the exponen…