Radio communication base station apparatus in...

Details Radio communication base station apparatus in... Radio communication base station apparatus in...

2007-04-27

2010-10-05

Bocure, Tesfaldet (Department: 2611)

Pulse or digital communications

Transmitters

Reexamination Certificate

active

07809079

ABSTRACT:
A base station is provided to suppress a drop of receiving power and deterioration of receiving characteristics by cancellation between the same symbols in the case of application of a repetition technology to multiple-carrier communication. In this base station (100), a repetition unit (103) for reproducing (making repetition of) each data symbol input from a modulating unit (102) to make out a plurality of identical data symbols, and a phase rotating unit (106) for giving a phase rotation to a data symbol input from a multiplexing unit (105). This time the phase rotating unit (106) provides the identical symbols made out by the repetition with the phase rotation which has a phase rotating difference different from phase rotating differences among a plurality of identical symbols transmitted with the ones identical to a plurality of the identical symbols at time and a frequency identical to those of a plurality of the identical symbols in adjacent cells or adjacent sectors.

REFERENCES:
patent: 2004/0190482 (2004-09-01), Baum et al.
patent: 2005/0100112 (2005-05-01), Yoshida et al.
patent: 2006/0120473 (2006-06-01), Baum
patent: 2009/0075700 (2009-03-01), Fukuoka et al.
patent: 2002-094483 (2002-03-01), None
patent: 2003-101511 (2003-04-01), None
patent: 2003-169382 (2003-06-01), None
patent: 2003-347979 (2003-12-01), None
patent: 2004/049618 (2004-06-01), None
International Search Report dated Jul. 31, 2007.
N. Maeda et al., “Performance Comparisons between OFCDM and OFDM in a Foward Link Broadband Channel,” The Institute of Electronics Information and Communications Engineers, Technical Report of IEICE, RCS2002-162, Aug. 2002, pp. 95-100.

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