Multiplex communications – Communication over free space – Combining or distributing information via frequency channels
Reexamination Certificate
2007-09-04
2007-09-04
Jung, Min (Department: 2663)
Multiplex communications
Communication over free space
Combining or distributing information via frequency channels
C370S203000, C375S347000
Reexamination Certificate
active
10271546
ABSTRACT:
A diversity receiving apparatus for use in an OFDM transmission radio communication/broadcasting system where OFDM signals are received by a plurality of antennas and input into a plurality of receivers. The OFDM received signals are further transformed into frequency spectra. Channel frequency responses are calculated by using OFDM received signal frequency spectra and a reference frequency spectrum generated in a reference spectrum generator. OFDM received signal frequency spectra distortions are compensated by using corresponding channel frequency responses. The transformed OFDM received signal frequency spectra are input into a selector unit as first input signals, while the distortion-compensated OFDM received signal frequency spectra are input into the selector unit as second input signals. The selector unit then selects a second input signal corresponding to a first input signal having maximum amplitude or maximum power. A demodulator then demodulates the output signal of the selector unit into a digital signal sequence.
REFERENCES:
patent: 4969207 (1990-11-01), Sakamoto et al.
patent: 5203027 (1993-04-01), Nounin et al.
patent: 5282222 (1994-01-01), Fattouche et al.
patent: 5291519 (1994-03-01), Tsurumaru
patent: 5487069 (1996-01-01), O'Sullivan et al.
patent: 5867478 (1999-02-01), Baum et al.
patent: 5914933 (1999-06-01), Cimini et al.
patent: 5949796 (1999-09-01), Kumar
patent: 6188669 (2001-02-01), Bellenger
patent: 6219334 (2001-04-01), Sato et al.
patent: 6246698 (2001-06-01), Kumar
patent: 6249250 (2001-06-01), Namekata et al.
patent: 6298035 (2001-10-01), Heiskala
patent: 6327314 (2001-12-01), Cimini, Jr. et al.
patent: 6628638 (2003-09-01), Sato et al.
patent: 9-172427 (1997-06-01), None
patent: 9-284191 (1997-10-01), None
S. Bulumulla, S. Kassam, and S. Venkatesh, “An Adaptive Diversity Receiver for OFDM in Fading Channels,” 1998, IEEE, pp. 1325-1329.
M. Alard, R. Helbert, B. Floch, and D. Pommier, “A New System of Sound Broadcasting to Mobile Receivers,” 1988, IEEE, pp. 416-420.
W. Zou, and Y. Wu, “COFDM: An Overview,” 1995, IEEE, pp. 1-8.
A. Chini, Y. Wu, M. El-Tanany, and S. Mahmound, “Filtered Decision Feedback Channel Estimation of OFDM-Based DTV Terrestrial Broadcasting System,” 1998, IEEE, pp. 2-11.
J. Gledhil, S. Anikhindi, and P. Avon, The Transmission of Digital Television in the UHF Band Using Orthogonal Frequency Division Multiplexing, pp. 175-180.
J. Linnartz and A. Gorokhov, “New Equalization Approach for OFDM Over Dispersive and Rapidly Time Varying Channel,” 2000, IEEE, pp. 1375-1379.
Namekata Minoru
Sato Kazumi
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Jung Min
LandOfFree
Method and apparatus for receiving diversity signals for use... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for receiving diversity signals for use..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for receiving diversity signals for use... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3752736