Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2011-01-18
2011-01-18
Odom, Curtis B (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S135000, C370S204000, C370S206000, C370S208000, C370S209000
Reexamination Certificate
active
07873096
ABSTRACT:
A frequency-division multiplexing transmission apparatus for transmitting data in a frequency spectrum specific to both symbol and mobile station, is disclosed. The apparatus encodes transmission data, modulates the encoded data, compresses the time domains of each symbol of the modulated transmission-symbol sequence, repeats the symbols a specified number of times, rearranges each of the symbols of the obtained repetitive-symbol sequence so that they have the same arrangement as the transmission-symbol sequence, generates each phase that changes at a speed specific to each symbol of the transmission-symbol sequence, performs phase rotation specific to the symbols for each symbol of the rearranged repetitive-symbol sequence, generates phase that changes at a speed specific to a mobile station, performs phase rotation specific to the mobile station for the symbol sequence for which the phase rotation was performed, and transmits the phase-rotated symbol sequence.
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Fujitsu Limited
Katten Muchin & Rosenman LLP
Odom Curtis B
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