Patent ID: 8379755

Claim:
For use in an RF transmitter, a method for providing adaptive digital filtering, comprising: detecting, at a waveform detector, a power level of a signal on a symbol-by-symbol basis; selecting, at a processor, from a lookup table coupled to the processor, a combination of filter parameter values according to the power level; and filtering, at a digital filter, the signal according to the combination of filter parameter values, wherein selecting the combination of filter parameter values minimizes the number of instructions performed by the digital filter, minimizes a power consumption of the digital filter, and allows the filtered signal to meet a spectrum emission mask of the RF transmitter, the spectrum emission mask identifying a maximum allowed power of spurious and noise signals in the spectrum outside an authorized transmission channel, the spectrum emission mask comprising a plurality of transmit power levels, each transmit power level corresponding to a different base transceiver system (BTS) type.