Method of limiting peak-to-average power ratio of a signal transmitted from a power amplifier

The disclosed method of limiting the peak-to-average power ratio (PAR) of a signal comprises: applying a pulse-shape filter fig.3: 4iq to a first signal IQ to generate a second signal for transmission from a power amplifier fig.3: 12. The method further comprises: applying each of a plurality of predictor filters fig.4: H0 - H3 to the first signal, each predictor filter approximating the pulse-shape filter based on a different respective set of filter coefficients, each thereby generating a respective third signal. The method also further comprises determining an indicator of amplitude of each of the third signals, fig.4: SSQ0-3, selecting the indicator corresponding to the largest of those amplitudes, fig.4: 26, generating a modifier based on the selected indicator, fig.4: 28, and using the modifier to limit the first signal fig.4: 32, prior to applying the pulse-shape filter fig.3: 4iq. Each predictor filter H0-H3 is a finite impulse response (FIR) filter operating in the time domain. The method is less costly to implement than prior art methods. A PAR reduction of about 1dB can be achieved in exchange for worsening error vector magnitude (EVM) by about 6%.