Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2007-01-31
2009-12-01
Moe, Aung S (Department: 2416)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S203000, C370S281000, C370S282000, C370S491000
Reexamination Certificate
active
07626921
ABSTRACT:
A wireless communication method includes generating and transmitting an OFDM signal containing a first OFDM symbol possessing a first transmitting pilot signal and a second transmitting pilot signal respectively allocated to a first subcarrier and a second subcarrier being symmetric with respect to a center frequency on a frequency axis, and a second OFDM symbol possessing a third transmitting pilot signal and a fourth transmitting pilot signal respectively allocated to the first subcarrier and the second subcarrier, wherein a difference between a product of a first transmitting pilot signal and a complex conjugate of a fourth transmitting pilot signal and a product of a third transmitting pilot signal and a complex conjugate of a second transmitting pilot signal is non-zero.
REFERENCES:
patent: 3682853 (2005-06-01), None
Hiroyuki Kamata, at al., “Effects of IQ Imbalance and Effective Compensation Scheme on the MIMO-OFDM Communication System”, Technical Report of lEICE, WBS2004-57, A. P2004-238, RCS2004-325, MoMuC2004-108, MW2004-235, Mar. 2005, 6 pages.
W.R. Kirkland et al., “I/Q distortion correction for OFDM direct conversion receiver”, Electronics Letters,vol. 39,No. 1, Jan. 9, 2003, pp. 131-133.
U.S. Appl. No. 12/140,613, filed Jun. 17, 2008, Egashira et al.
Egashira Yoshimasa
Sato Kazumi
Tanabe Yasuhiko
Kabushiki Kaisha Toshiba
Medina Steven
Moe Aung S
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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