Apparatus and method for selecting modulation and filter roll-off to meet power and bandwidth requirements

For use in a wireless network configured for communication with a plurality of subscriber stations according to a multi-carrier protocol, a method of communicating in an uplink between a base station and a subscriber station, the subscriber station configured to transmit in the uplink using a configurable spectral shaping filter and using a plurality of selectable modulation orders, the method comprising the steps of:

• determining a required power efficiency associated with the subscriber station;
• and
• selecting a modulation order and a filter parameter to be used by the subscriber station to transmit in the uplink, the modulation order and the filter parameter selected to maximize a bandwidth efficiency of the subscriber station while maintaining the required power efficiency.

For use in a wireless network configured for communication with a plurality of subscriber stations according to a multi-carrier protocol, a base station operable to receive an uplink signal transmitted by a subscriber station, the subscriber station configured to transmit in the uplink using a configurable spectral shaping filter and using a plurality of selectable modulation orders, wherein the base station is configured to:

• determine a required power efficiency associated with the subscriber station;
• and
• select a modulation order, a filter parameter, and a data rate to be used by the subscriber station to transmit in the uplink, the modulation order and the filter parameter selected to maximize a bandwidth efficiency of the subscriber station while maintaining the required power efficiency.

For use in a wireless network configured for communication with a plurality of subscriber stations according to a multi-carrier protocol, a method of communicating in an uplink between a base station and a subscriber station, the subscriber station configured to transmit in the uplink using a configurable spectral shaping filter and using a plurality of selectable modulation orders, the method comprising the steps of:

• determining a required power efficiency associated with the subscriber station;
• and
• selecting a modulation order, a filter parameter, and a data rate to be used by the subscriber station to transmit in the uplink, the modulation order and the filter parameter selected to maximize a bandwidth efficiency of the subscriber station while maintaining the required power efficiency.