Loading patent…
AssigneeNortel Networks Limited
InventorsMartin J. O'Flaherty, Roman N. Nemish, David M. Tholl, Gordon B. Neilson, Charles E. Norman
Estimating the term…
A significant part of the cost of a base station in the cellular mobile radio system is the power amplifier. Thus it is desirable to maximise usage of a power amplifier and in particular to gain the best power output from the amplifier or to improve its efficiency. Such power amplifiers, however, must operate within strict spectral boundaries and thus power amplifiers are typically over-specified in order to ensure that the spectral requirements are met. By measuring the output of the amplifier and determining distortion factors and then adaptively adjusting the operating characteristics of the amplifier, the degree of over-specification of the amplifier required may be reduced with consequent cost and environmental savings.
A closed-loop power amplifier distortion controller comprising:
A method of optimising efficiency in a power amplifier comprising:
A closed-loop power amplifier distortion controller comprising output measuring means operable to measure a predetermined output characteristic of the amplifier output, processing means for processing the measurement produced by the output measuring means and control means for adjusting an operating parameter of the amplifier responsive to the processed measurement and wherein the said predetermined output characteristic is the frequency spectrum.
A closed-loop power amplifier distortion controller comprising output measuring means operable to measure a predetermined output characteristic of the amplifier output, processing means for processing the measurement produced by the output measuring means and control means for adjusting an operating parameter of the amplifier responsive to the processed measurement and wherein the said predetermined output characteristic is selected from the group containing phase distortion and amplitude distortion.
A base station for a radio network including:
A wireless communications network including a base station having:
Dependencies are inferred from the claim text.