Patent ID: 7660683

Claim:
Apparatus comprising: an upscaler configured to upscale a detected waveform or a waveform derived from a detected waveform to provide a first waveform; a determiner configured to determine a difference between the first waveform and a second waveform, the second waveform comprising a plateau waveform or a waveform derived from a plateau waveform, to provide a third waveform; a scaler configured to scale the third waveform to provide a fourth waveform; and a combiner configured to combine the fourth waveform with the second waveform to provide an auxiliary waveform; wherein, each of the detected waveform, plateau waveform, and auxiliary waveform has an instantaneous value at each of multiple points in time; and the apparatus is configured to provide, for power measurement, a fifth waveform, wherein: when the instantaneous value of the detected waveform exceeds the instantaneous value of the plateau waveform, the fifth waveform is provided with an instantaneous value comprising the instantaneous value of the detected waveform at a corresponding point in time, and when the instantaneous value of the detected waveform does not exceed the instantaneous value of the plateau waveform, the fifth waveform is provided with an instantaneous value comprising the largest of: a) the instantaneous value of the plateau waveform and b) the instantaneous value of the auxiliary waveform at a corresponding point in time.