Patent ID: 8320497

Claim:
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: a first signal shape having substantially equal power across frequencies of a modulated signal; a second signal shape having greater power at frequencies proximate to a center frequency of the modulated signal and reduced power at frequencies at outer ends of a bandwidth of the modulated signal; and a third signal shape having greater power at frequencies proximate to the center frequency of the modulated signal, without regard to spectral flatness, and substantially no power at frequencies at outer ends of the bandwidth of the modulated signal; 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.