Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2011-08-09
2011-08-09
Fan, Chieh M (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S261000, C375S295000, C375S296000, C375S285000, C375S346000
Reexamination Certificate
active
07995663
ABSTRACT:
To narrow the dynamic range of multicarrier signals and prevent both the increment of cost and the degradation of power efficiency. A modulating part (101) modulates transport data. An S/P converting part (102) performs an S/P conversion of a modulated symbol and outputs the modulated symbols, the number of which is the same as the number of all subcarriers, to an IFFT part (103) in parallel. The IFFT part (103) assigns the modulated symbols to the subcarriers, the frequencies of which are orthogonal to each other, to perform an inverse fast Fourier transform. A P/S converting part (104) performs a P/S conversion of the signals of time domain. When the instantaneous amplitude level of an OFDM signal is lower than a predetermined threshold value, a pit clip part (105) replaces this amplitude level by the predetermined threshold value. In other words, when the instantaneous power of the OFDM signal is close to zero, the pit clip part (105) converts a power value to a value that is greater than the actual power value.
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Ota Eiji
Seki Yuta
Uesugi Mitsuru
Dickinson Wright PLLC
Fan Chieh M
Lee Siu M
Panasonic Corporation
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