TY - GEN
T1 - Adaptive modulation for MIMO beamforming under average BER constraints and imperfect CSI
AU - Paris, José F.
AU - Goldsmith, Andrea J.
PY - 2006
Y1 - 2006
N2 - Adaptive modulation schemes for fading channels are usually required to fulfill certain long-term average BER targets. However, for simplicity and mathematical tractability, these schemes are often designed by fixing the short-term instantaneous BER to the target value. In this paper, the analysis and design of variable-rate variable-power QAM schemes with average BER constraints are tackled for a MIMO beamforming system with MRC and imperfect CSI. The SISO system is considered as a special case of these more general results. Approximate closed-form policies are derived for continuous rate and power adaptation which are compared to fully discrete policies designed numerically. Closed-form expressions for the ASE of the proposed policies are derived and evaluated. Our results indicate that imperfect CSI and discrete rate and power constraints do not significantly degrade performance.
AB - Adaptive modulation schemes for fading channels are usually required to fulfill certain long-term average BER targets. However, for simplicity and mathematical tractability, these schemes are often designed by fixing the short-term instantaneous BER to the target value. In this paper, the analysis and design of variable-rate variable-power QAM schemes with average BER constraints are tackled for a MIMO beamforming system with MRC and imperfect CSI. The SISO system is considered as a special case of these more general results. Approximate closed-form policies are derived for continuous rate and power adaptation which are compared to fully discrete policies designed numerically. Closed-form expressions for the ASE of the proposed policies are derived and evaluated. Our results indicate that imperfect CSI and discrete rate and power constraints do not significantly degrade performance.
UR - https://www.scopus.com/pages/publications/39349095976
U2 - 10.1109/ICC.2006.254930
DO - 10.1109/ICC.2006.254930
M3 - Conference contribution
SN - 1424403553
SN - 9781424403554
T3 - IEEE International Conference on Communications
SP - 1312
EP - 1317
BT - 2006 IEEE International Conference on Communications, ICC 2006
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2006 IEEE International Conference on Communications, ICC 2006
Y2 - 11 July 2006 through 15 July 2006
ER -