Pulse or digital communications – Transmitters
Reexamination Certificate
2006-06-29
2009-12-08
Fan, Chieh M (Department: 2611)
Pulse or digital communications
Transmitters
Reexamination Certificate
active
07630454
ABSTRACT:
In a frequency-division multiplexing transmission apparatus for transmitting data in a frequency spectrum specific to a mobile station, a chip-dividing unit divides each symbol of a transmission-symbol sequence into chips; a first phase rotation unit performs π/2 phase rotation for the odd-numbered chips of the divided chips; a chip-repetition and rearrangement unit compresses the time domains of each chip of the chip sequence after phase rotation, then repeats the chips a specified number of times and rearranges the chips of the obtained repetitive-chip sequences so that they have the same arrangement as the original chip sequence; a second phase rotation unit performs phase rotation that changes at a speed specific to a mobile station for each chip of the rearranged repetitive-chip sequence; and a transmission unit transmits said phase-rotated chips.
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Goto et al. ( “Variable Spreading and Chip repetition Factors (VSCRF) -CDMA in Reverse Link for Broadband Packet Wireless Access” lEICE Transactions on Communications, Communications Society, Tokyo, JP, vol. E88-B, No. 2, Feb. 2005, pp. 509-519, XP001225513 ISSN: 09i 6-8516).
Y. Goto et al.; “Variable Spreading And Chip Repetition Factors (VSCRF)-CDMA In Reverse Link For Broadband Packet Wireless Access”; IEICE Transactions on Communications, Communications Society, Tokyo, Japan, vol. E88-B, No. 2, Feb. 2005 pp. 509-519.
European Search Report dated Jun. 15, 2007; Application No. 06013116.6-2411.
Fan Chieh M
Fujitsu Limited
Joseph Jaison
Myers Wolin LLC
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