We characterize the power allocation that maximizes the rate per unit bandwidth supported with arbitrary reliability over single-user multi-antenna channels known instantaneously by the receiver and in distribution by the transmitter. The characterization is valid for arbitrary channels and numbers of antennas. Although, in general, it leads to a fixedpoint solution, at low and high signal-to-noise it provides explicit allocations. For arbitrary signal-to-noise ratios, we present an iterative algorithm that exhibits remarkable properties: robustness, rapid convergence and universal applicability. Further, when applied to the proper set of signalling eigenvectors, the algorithm converges to the power allocation that attains capacity.
Power Allocation in Multi-Antenna Communication with Statistical Channel Information at the Transmitter / Tulino, ANTONIA MARIA; A., Lozano; S., Verdú. - ELETTRONICO. - (2004), pp. 1-5. (Intervento presentato al convegno 2004 IEEE Int. Symposium on Personal, Indoor and Mobile Radio Communications tenutosi a Barcelona, Spain nel Sep. 5-8, 2004).
Power Allocation in Multi-Antenna Communication with Statistical Channel Information at the Transmitter
TULINO, ANTONIA MARIA;
2004
Abstract
We characterize the power allocation that maximizes the rate per unit bandwidth supported with arbitrary reliability over single-user multi-antenna channels known instantaneously by the receiver and in distribution by the transmitter. The characterization is valid for arbitrary channels and numbers of antennas. Although, in general, it leads to a fixedpoint solution, at low and high signal-to-noise it provides explicit allocations. For arbitrary signal-to-noise ratios, we present an iterative algorithm that exhibits remarkable properties: robustness, rapid convergence and universal applicability. Further, when applied to the proper set of signalling eigenvectors, the algorithm converges to the power allocation that attains capacity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.