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THE TOEPLITZNESS OF WEIGHTED COMPOSITION OPERATORS
Ohno, Shuichi Korean Mathematical Society 2018 대한수학회논문집 Vol.33 No.2
We will consider the asymptotic toeplitzness associated with weighted composition operators on the Hardy-Hilbert space $H^2$.
PRODUCTS OF DIFFERENTIATION AND COMPOSITION ON BLOCH SPACES
Ohno, Shuichi Korean Mathematical Society 2009 대한수학회보 Vol.46 No.6
We will consider the questions of when the products of composition and differentiation are bounded and compact on Bloch and little Bloch spaces.
Antenna Selection for Single Carrier Cyclic Prefixed Transmission
Shuichi Ohno,Emmanuel Manasseh 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
Single carrier cyclic prefixed transmissions between a base station having multiple antenna and a terminal having one antenna are considered. We propose two antenna selections based on the channel norm and on the worst channel gain. Our selection schemes do not always yield the optimal selection but have less computational complexities. The channel norm criterion has the least complexity, while the channel gain criterion exhibits almost the same performance with the optimal selection.
WEIGHTED COMPOSITION OPERATORS ON THE MINIMAL MÖBIUS INVARIANT SPACE
Ohno, Shuichi Korean Mathematical Society 2014 대한수학회보 Vol.51 No.4
We will characterize the boundedness and compactness of weighted composition operators on the minimal M$\ddot{o}$bius invariant space.
Products of differentiation and composition on Bloch spaces
Shuichi Ohno 대한수학회 2009 대한수학회보 Vol.46 No.6
We will consider the questions of when the products of composition and differentiation are bounded and compact on Bloch and little Bloch spaces. We will consider the questions of when the products of composition and differentiation are bounded and compact on Bloch and little Bloch spaces.
WEIGHTED COMPOSITION OPERATORS ON THE MINIMAL M¨OBIUS INVARIANT SPACE
Shuichi Ohno 대한수학회 2014 대한수학회보 Vol.51 No.4
We will characterize the boundedness and compactness of weighted composition operators on the minimal M¨obius invariant space.
Masayoshi Nakamoto,Takao Hinamoto,Shuichi Ohno 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
In this paper, we propose a new FIR filter structure which consists of the shift operation circuits and single multiplier. Though the approximate accuracy for the required frequency response is not better than that of the general FIR filters, the processing speed is higher because most calculation is the shift operation in this structure. The error caused by the change of filter coefficients distributes in the stop-band, so the sharp cutoff characteristic can be retained. Of course, the stability and linear phase characteristic of the filter is also preserved. Also, we show the algorithms for designing the proposed FIR filters. For designing the single multiplier, the Lagrange multiplier method is used, and for optimization of the shift operation circuits, we propose the branch and bound based algorithm. Finally, we show the effectiveness of the proposed method by using the numerical example.
INTERPOLATIONS FOR HÖLDER'S INEQUALITY
Izuchi, Kei Ji,Izuchi, Kou Hei,Ohno, Shuichi Korean Mathematical Society 2013 대한수학회보 Vol.50 No.3
Kwon and Bae gave an interpolation for a continuous form of H$\ddot{o}$lder's inequality for a real-valued bounded measurable function on a product of measure spaces. It is given some generalizations of their result.
Interpolations for Holder's inequality
Kou Hei Izuchi,Ken Ji Izuchi,Shuichi Ohno 대한수학회 2013 대한수학회보 Vol.50 No.3
Kwon and Bae gave an interpolation for a continuous form of Holder's inequality for a real-valued bounded measurable function on a product of measure spaces. It is given some generalizations of their result.