Patent ID: 6046987
Filing Date: 2000-04-04
Classification: H04B,H04W

Abstract:
An adjacent and alternate channels power measurement apparatus which is designed to receive a burst signal obtained by modulated a carrier frequency for a main channel with digital data set in a transmission frame and containing a pre-designated specific data item and to measure leakage power appearing in channels adjacent to the main channel, said apparatus comprising:A/D converting means (23) for converting said burst signal to digital signals;waveform memory means (25) for storing the digital signals;demodulating means (29) for demodulating the digital signals read from said waveform memory means to said digital data;extraction region calculating means (33, 34) for detecting a position of pre-designated specific data item from the digital signals read from said waveform memory and determining an extraction region of the digital signals stored in said waveform memory means, in accordance with the position of the pre-designated specific data item, thus detected;filter means (35) for allowing passage of a main-channel signal component contained in the digital signals and adjacent-channel signal components contained in the digital signals;supply means (27, 28, 34) supplying, to said filter means, that one of the digital signals stored in said waveform memory which exists in the extraction region determined by said extraction region calculating means; andpower measuring means (36) for individually measuring power of the main-channel signal component and adjacent-channel signal components, which have passed through said filter, means.