ADJACENT CHANNEL LEAKAGE POWER RATIO MEASURING APPARATUS, CHANNEL POWER MEASURING APPARATUS, METHOD, PROGRAM, AND RECORD MEDIUM WITH RECORDED PROGRAM

The frequency of an adjacent channel signal is reduced by a down converter (12), wherein the signal (adjacent channel signal) in a predetermined band centered around the adjacent channel frequency passes through a band-pass filter (22). At this time, a signal out of the predetermined band among the...

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Bibliographic Details
Main Authors MUTO, MASAHIKO, MORIKAWA, AKIO
Format Patent
LanguageEnglish
French
Japanese
Published 22.08.2002
Edition7
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
TRANSMISSION
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Summary:The frequency of an adjacent channel signal is reduced by a down converter (12), wherein the signal (adjacent channel signal) in a predetermined band centered around the adjacent channel frequency passes through a band-pass filter (22). At this time, a signal out of the predetermined band among the signals output from the down converter (12) by the band-pass filter (22) passes through the filter (22). An FFT section (32) outputs the signal having passed through the band-pass filter (22) by making it correspond with a frequency so that a first power measuring section (34) is used for power measurement on the basis of only the signal in a predetermined band. Therefore, power on an adjacent channel signal is accurately measured upon reception of a measurement signal. On réduit la fréquence d'un signal de canal adjacent au moyen d'un abaisseur de fréquences (12). Le signal (du canal adjacent) dans une bande prédéterminée centrée autour de la fréquence dudit canal traverse un filtre passe-bande (22). A cet instant, un signal provenant de la bande prédéterminée parmi les signaux de sortie produits par l'abaisseur de fréquence (12) via le filtre passe-bande traverse le filtre (22). Une section FFT (transformée de Fourier rapide) (32) émet le signal qui a traversé le filtre passe-bande (22) en le faisant correspondre à une fréquence de telle sorte qu'une première section de mesure de puissance (34) mesure de la puissance à partir de ce seul signal dans une bande prédéterminée. Ainsi, la puissance sur un signal de canal adjacent peut être mesurée avec précision à la réception du signal de mesure.
Bibliography:Application Number: WO2002JP00379