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A Method for Converting Amplitude Probability Distribution of Disturbance from One Measurement Frequency to Another
Yasushi MATSUMOTO Kaoru GOTOH Takashi SHINOZUKA
Publication
IEICE TRANSACTIONS on Communications
Vol.E91B
No.6
pp.20102019 Publication Date: 2008/06/01
Online ISSN: 17451345
DOI: 10.1093/ietcom/e91b.6.2010
Print ISSN: 09168516 Type of Manuscript: PAPER Category: Electromagnetic Compatibility(EMC) Keyword: amplitude probability distribution, disturbance measurement, electromagnetic interference, emission limit,
Full Text: FreePDF(730KB)
Summary:
To estimate the impact of electromagnetic disturbances on multicarrier wireless systems, a method for converting an amplitude probability distribution (APD) of disturbance measured at a frequency to be valid for another frequency is presented. The conversion uses two parameters, the receiver noise power of the APD measuring equipment and a scale factor that can be estimated from a measured disturbance spectrum. The method is based on the assumption that the difference in measurement frequency affects only the relative scale of the probability distribution of bandlimited disturbance amplitude, and is applicable to disturbances of practically importance such as 1) continuous or pulsemodulated wideband Gaussian noise, 2) disturbance with a much narrower bandwidth than receiver bandwidth B, and 3) repetitive short pulses with similar waveforms with an interval much longer than 1/B. The validity of the proposed method is examined by measurements of actual disturbances.

