Rate adaptive for finite-length block-fading channels

Khoa Nguyen

Institute for Telecommunications Research
University of South Australia

Abstract:

The block-fading channel is a mathematical model for slowly varying channels usually encountered in wireless applications with delay constraints. The channel is non-ergodic, and thus fixed transmission suffers from low throughput and/or high outage. Existing adaptive techniques usually assume infinite block-length, which are not optimal for delay-limited applications. We will focus on rate adaptation strategies to maximize the throughput over finite-length block-fading channels. The solution is trivial when channel state information of all blocks are available at the transmitter (full CSIT). For systems with causal CSIT, we formulate the dynamic optimization approach for systems where channel sate is causally available, and propose effective approximation for practical implementation.

Biography:

Khoa Nguyen received BE in Electrical Engineering at University of Melbourne in 2005 and PhD in Telecommunications at University of South Australia in 2010. Since 2009, Khoa Nguyen is employed as a research fellow at Institute for Telecommunications Research, University of South Australia. His research interest include information theory, coding theory, adaptive transmission and delay-limited communications.