Worst-Case Expected-Capacity Loss of Slow-Fading Channels Academic Article uri icon

abstract

  • For delay-limited communication over block-fading channels, the difference between the ergodic capacity and the maximum achievable expected rate for coding over a finite number of coherent blocks represents a fundamental measure of the penalty incurred by the delay constraint. This paper introduces a notion of worst-case expected-capacity loss. Focusing on the slow-fading scenario (one-block delay), the worst-case additive and multiplicative expected-capacity losses are precisely characterized for the point-to-point fading channel. Extension to the problem of writing on fading paper is also considered, where both the ergodic capacity and the additive expected-capacity loss over one-block delay are characterized to within one bit per channel use. © 1963-2012 IEEE.

author list (cited authors)

  • Yoo, J. W., Liu, T., Shamai Shitz, S., & Tian, C.

publication date

  • January 1, 2013 11:11 AM