专利名称：Detection of sinusoidal waveform in noise发明人：Szajnowski, Dr. Wieslaw Jerzy申请号：EP08170389.4申请日：20081201公开号：EP2192414A1公开日：20100602
专利附图：
摘要：Signal processing method and apparatus are disclosed for detecting a signalhaving the form of a sine wave or its segment in the presence of noise or otherinterference. A received segment is processed to calculate two measures, namely ameasure of the mean level of the signal and a measure of the concordance of a zero-
crossing pattern of the received segment with a uniform pattern exhibited by a sinusoidalwaveform having a frequency equal to the centre frequency of the signal. The calculatedvalues of these two measures are used to define a point in a plane having axescorresponding to the measures. The position of the point is compared with a two-dimensional decision boundary in the plane which separates a region of the planerepresenting noise and a region of the plane representing noise plus a sinusoidal
waveform. Based on the position of the point relative to the boundary, a decision is madewhether the received signal contains noise alone or noise and a sinusoidal waveform.
申请人：Mitsubishi Electric R&D Centre Europe B.V.,Mitsubishi Denki Kabushiki Kaisha
地址：UK Branch Visual & Sensing Division 20 Frederick Sanger Road The SurreyResearch Park Guildford, Surrey GU2 7YD GB,7-3, Marunouchi 2-chome, Chiyoda-kuTokyo, 100-8310 JP
国籍：GB,JP
代理机构：HOFFMANN EITLE
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