| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
(1) A characteristics of our method on the blind source separation problem is to estimate of the number of sources in the first step. To estimate the number of sources, we transform the signals into the time-frequency domain and consider the quotient of the transforms of the observed signals. For this method, there are some problems. We formulated the problems mathematically. A problem is that it will be difficult to separate the sources when the number of sources is large. For this problem, we clarified the causes by an error evaluation in the theory of mathematics.
(2) To treat the case that the sources are on the sphere, we considered the Gabor transformation on the sphere. We expressed the Gabor transform of analytic functionals on the sphere as the infinite sum by means of the spherical harmonics (or extended Legendre polynomials) and Bessel functions.
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