Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2003-12-18
2009-12-15
Chou, Albert T (Department: 2416)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S210000
Reexamination Certificate
active
07633850
ABSTRACT:
A coding section201of a transmitter receives an input of a transmitting signal and LDPC-codes the received signal, a serial-to-parallel conversion section102converts the coded signal from serial to parallel, and outputs m (m≧2) intermediate signals, a unitary matrix modulation section103modulates the m intermediate signals to a unitary matrix of m rows and m columns where elements excepting diagonal elements are zero, and outputs an obtained matrix, a split section111supplies each of the diagonal elements of the matrix to each input channel of an inverse Fourier transform section112as an input signal, the inverse Fourier transform section112inversely Fourier transforms the input signals supplied to the input channels, and outputs the obtained m inversely Fourier transformed signals, a parallel-to-serial conversion section113converts the m inversely Fourier transformed signals from parallel to serial, and outputs one transmission signal, a transmitting section114transmits the output transmission signal, and any of frequency differences between the channels of the inverse Fourier transform section112is a predetermined coherent bandwidth or more.
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Article from Technical Report of IEICE, Oct. 2002 entitledConvolutional Coded Coherent and Differential Unitary Space-Time Modulated OFDM with Bit Interleaving for Multiple Antennas System.
Article from Technical Report of IEICE, Jan. 2003 entitledLDPC Coded Unitary Space-Time Modulated OFDM in Broadband Mobile Channel.
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Chou Albert T
Howard & Howard Attorneys PLLC
National Institute of Information and Communications Technology
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