Electrical and Computer Engineering
2332 Main Mall
Vancouver,
BC
Canada
V6T 1Z4
Tel +1.604.822.2872
Fax +1.604.822.5949
Email:
info@ece.ubc.ca
| Title | CTH16-6: Adaptive Coding and Modulation for Hybrid ARQ Systems over Partially Observable Nakagami-m Fading Channels |
| Publication Type | Conference Paper |
| Year of Publication | 2006 |
| Authors | Karmokar, A. K., and V. K. Bhargava |
| Conference Name | Global Telecommunications Conference, 2006. GLOBECOM '06. IEEE |
| Pagination | 1 -6 |
| Date Published | nov. |
| Keywords | adaptive codes, adaptive coding-modulation, adaptive modulation, automatic repeat request, channel capacity, channel coding, channel estimation, channel state information, convolutional coded M-QAM, convolutional codes, cross-layer rate adaptation problem, heuristic-based methods, hybrid ARQ systems, Markov processes, modulation coding, Nakagami channels, Nakagami-m fading channels, packet error rate, partially observable Markov decision process, POMDP-based approach, quadrature amplitude modulation |
| Abstract | We study coding and modulation rate adaptation problem for HARQ systems with partially observable state from cross-layer viewpoint. The rate of convolutionally coded M-QAM is adapted jointly with buffer state and channel state. We assume that perfect channel state information is not known at the transmitter, but it can be estimated from previous actions and observations. POMDP-based approach is utilized to formulate the problem, where average throughput is maximized, and average delay, packet error rate and overflows are minimized. To solve the cross-layer adaptation problem approximately, we discuss two heuristic-based methods and compare their applicability with completely observable channel state case by simulation results. |
| URL | http://dx.doi.org/10.1109/GLOCOM.2006.128 |
| DOI | 10.1109/GLOCOM.2006.128 |