Compensating power spectral density for power levels

摘要

A power spectral density (PSD) shape may be modified based upon the transmitter power setting of a transmitter. The power associated with notched frequencies and adjacent frequencies may be adjusted responsive to a change in transmitter power setting. As a result of adjusting the power for the notched frequencies and adjacent frequencies when operating at the different transmitter power setting, the performance of the transmission system is improved. The PSD shape may be considered dynamic, being modified responsive to a change in transmitter power setting by adjusting power associated with notches in the PSD shape based on the transmitter power setting and PSD constraint.

主权项

1. A method performed by an apparatus for communicating via a multi-frequency communications channel, the method comprising:
determining, by the apparatus, a first power setting for a transmitter of the apparatus; determining a first power spectral density (PSD) shape based, at least in part, on the first power setting for the transmitter, wherein the first PSD shape defines power levels for each of a plurality of frequencies to communicate with a receiving device, the first PSD shape including a first notch power level for one or more notch frequencies associated with a notch and reduced power associated with at least one adjacent frequency, adjacent to the notch; operating the transmitter at the first power setting using the first PSD shape; determining to reduce the first power setting to a second power setting, after said determining the first PSD shape; modifying the first PSD shape to prepare a modified PSD shape for use with the second power setting by increasing power for the one or more notch frequencies and for the at least one adjacent frequency, the modified PSD shape including a second notch power level for the one or more notch frequencies that is the same as the first notch power level; and operating the transmitter at the second power setting using the modified PSD shape.