Frequency-division multiplexing transceiver apparatus and...

Pulse or digital communications – Transceivers

Reexamination Certificate

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C375S295000

Reexamination Certificate

active

07599428

ABSTRACT:
A frequency-division multiplexing transmission apparatus that transmits data at a frequency spectrum specific to a mobile station in which a π/4-continuous-phase-rotation unit performs phase rotation that increases in increments of π/4 or decreases in decrements of −π/4 for each symbol of a transmission-symbol sequence; a symbol-repetition and rearrangement unit compresses the time domains of each symbol of the transmission-symbol sequence after phase rotation, then repeats those symbols a specified number of times (L times), and rearranges the symbols of the obtained repetitive-symbol sequence so that it has the same arrangement as the original transmission-symbol sequence; a phase-rotation unit performs phase rotation that changes at a speed specific to the mobile station for each symbol of the rearranged repetitive-symbol sequence; and a transmission unit transmits the phase-rotated symbols.

REFERENCES:
patent: 2004/0156386 (2004-08-01), Atarashi et al.
patent: 2005/0260968 (2005-11-01), Ito et al.
patent: 2008/0225895 (2008-09-01), Lee et al.
patent: 2005-057582 (2005-03-01), None
Schnell, Michael et al., “Application of IFDMA to Mobile Radio Transmission,” Universal Personal Communications, ICUPC 1998, IEEE 1998 International Conference on Florence, Italy, IEEE, vol. 2, Oct. 5, 1998, pp. 1267-1272.

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