SIGNAL COUNT ESTIMATION SYSTEM AND METHOD

PROBLEM TO BE SOLVED: To accurately estimate a signal count even in an environment where noises exist that have correlation among sensors. SOLUTION: A blind signal separation part 20 performs signal separation by using algorithm such as independent componential analysis on the basis of a signal inpu...

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Bibliographic Details
Main Author AKIYAMA SHIZUO
Format Patent
LanguageEnglish
Published 21.02.2008
Subjects
ANALOGOUS ARRANGEMENTS USING OTHER WAVES
DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES
LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES
MEASURING
PHYSICS
RADIO DIRECTION-FINDING
RADIO NAVIGATION
TESTING
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Summary:PROBLEM TO BE SOLVED: To accurately estimate a signal count even in an environment where noises exist that have correlation among sensors. SOLUTION: A blind signal separation part 20 performs signal separation by using algorithm such as independent componential analysis on the basis of a signal input from a sampling part 10 to output separated waveforms of up to the same count as a sensor count. A signal count estimation part 30 determines whether or not the amplitude distribution of the separated waveforms coincide with the amplitude distribution of noises as to the respective separated waveforms that are blind-separated by a noise/signal discrimination part 31, thereby discriminating between signals and noises. Further, a spectrum dispersion determination part 32 converts the separated waveforms into frequency spectra to determine whether or not each of the separated waveforms includes any signal components based on the value of dispersion of the frequency spectra. The estimation part 30 estimates a signal count based on the results of the discrimination/determination. COPYRIGHT: (C)2008,JPO&INPIT
Bibliography:Application Number: JP20060217354