Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2006-01-05
2011-12-13
Payne, David C. (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S259000
Reexamination Certificate
active
08077782
ABSTRACT:
[Object] To prevent communication performance capabilities from deteriorating even in the cases that the estimation error of the propagation path is significant, and that the variation speed of the propagation path characteristics is fast.[Overcoming Means] An adaptive modulation control apparatus which adaptively selects a modulation parameter from among a plurality of modulation parameters corresponding to an estimation result of a propagation path state and which has a frequency axis gradient calculating section (11) which receives propagation path estimation information indicative of an estimation result of a propagation path state, and calculates a gradient of a function of frequency corresponding to each frequency when the propagation path estimation information is set to be the function of frequency, a correcting section (12) that makes a correction to increase or decrease an upper limit or a lower limit of a numerical range of the propagation path state in one-to-one correspondence with each of the modulation parameters corresponding to the calculated gradient of the function of frequency, and a modulation parameter selecting section (13) that selects a modulation parameter corresponding to the corrected numerical range of the propagation path state including the propagation path estimation information.
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Nogami Toshizo
Onodera Takashi
Tsuboi Hidekazu
Birch & Stewart Kolasch & Birch, LLP
File Erin
Payne David C.
Sharp Kabushiki Kaisha
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