Patent ID: 8320497
Filing Date: 2012-11-27
Classification: H04L

Abstract:
1. A method for producing an outgoing radio frequency signal, comprising: selecting a particular signal shape from a signal shaping logic that has a plurality of signal shapes to produce a plurality of corresponding spectral mask densities, wherein the particular selected signal shape that generates a particular corresponding spectral mask density is based, at least in part, on a signal type and corresponding standard or protocol, and wherein the plurality of spectral mask densities that are to be generated at an output of a power amplifier corresponds to signal shapes that include: applying pre-distortion compensation to an outgoing digital data in a digital transmit path to compensate for downstream distortion introduced in an analog transmit path; generating control information from the signal shaping logic corresponding to the particular selected signal shape; applying the control information to control a digital gain to adjust gain of the outgoing digital data after pre-distortion compensation in the digital transmit path and to control analog gain and filtering in the analog transmit path, including separate in-phase (I) and quadrature (Q) filtering control in I and Q branches of the analog transmit path to generate non-symmetric amounts of power to frequencies at the outer ends of the bandwidth of the modulated signal; and producing the particular corresponding spectral mask density at the output of the power amplifier for transmission of the modulated signal.