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Process for analysing the ambient electromagnetic field and associated portable device
| Details |
Inventors: Veysset, Re; Chauvin, Se; Picard, Dominique; Fleury, Gilles; Le Brusquet, Laurent;
Assignee: Bouygues Telecom (Boulogne Billancourt, FR)
Primary Examiner: Nguyen; Duc
Assistant Examiner: Vu; Michael
Attorney, Agent or Firm: Blakely Sokoloff Taylor & Zafman
The invention relates to a process for analysing the ambient electromagnetic field in which, to determine the field level of one or more cellular telecommunication networks, the field is analysed at the frequencies of the beacon pathways of base stations of the network or networks, characterized in that it comprises the steps according to which: with the aid of detection means (4), the intensity of the electromagnetic field is measured over time for several frequencies of a frequency range which is sampled, a processing unit (1) determines for each frequency, from the measurements thus performed, at least one characteristic parameter of the electromagnetic field, the processing unit (1) determines from the values of this characteristic parameter, the frequencies which correspond to the signals of the beacon pathways of one or more base stations, by applying a selection criterion based on the statistical properties of the field radiated by this type of station. |
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DETAILED DESCRIPTION The invention claimed is: 1.
Process for analysing the ambient electromagnetic field in which, to determine the field level of one or more cellular telecommunication networks, the process comprising the steps according to which: with the aid of detection means (4), the intensity of the electromagnetic field is measured over time for several frequencies of a frequency range which is sampled, a processing unit (1) determines for each frequency, from the measurements thus performed, at least one characteristic parameter of the electromagnetic field, the processing unit (1) determines from the values of this characteristic parameter, the frequencies which correspond to the signals of beacon pathways of at least one base station, by applying a selection criterion based on statistical properties of the field radiated on the beacon pathways; and wherein one of the characteristic parameters determined is chosen from the following parameters: the mean intensity of the electromagnetic field, the standard deviation of the variation in the intensity of the electromagnetic field, the period of variation of the electromagnetic field, the minimum intensity of the electromagnetic field, the half-sum of quartiles 1 and 3 of the intensity of the electromagnetic field, the difference between quartile 2 and the discrepancy between quartiles 1 and 3 of the intensity of the electromagnetic field.
2.
Process according to claim 1, wherein the intensity of the electromagnetic field is determined from the measurement of the magnetic field and/or of the electric field.
3.
Process according to, claim 2 or claim 1 wherein, for a given frequency, a relevant characteristic parameter is the mean intensity of the electromagnetic field at this frequency, and wherein the frequencies of the beacon pathways of the base stations of a cellular telecommunication network are determined by taking into consideration those for which the mean intensity is a maximum.
4.
Process according to, claim 2 or claim 1 wherein, for a given frequency, a relevant characteristic parameter is the standard deviation of the variation in the intensity of the electromagnetic field measured at this frequency, and wherein the frequencies of the beacon pathways of the base stations of a cellular telecommunication network are determined by taking into consideration those for which the normalized standard deviation is a minimum
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Ring Tones 
