Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2007-08-07
2007-08-07
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S298000, C375S316000
Reexamination Certificate
active
10067384
ABSTRACT:
A transmitter transmits a quadrature modulated signal including transmission data as an I component and a known PN sequence as a Q component. The signal is received by a receiver which separates the signal into a real part and an imaginary part, and then is supplied to an equalizer and also to an I correlation circuit and a Q correlation circuit. In the meantime, a PN sequence identical with the PN sequence of the transmitter is generated by a generator, and then supplied to the I correlation circuit and the Q correlation circuit. The I correlation circuit and the Q correlation circuit determine a ratio and a time difference between a leakage component of the Q component leaking to an I channel and the Q component formed by a direct wave, and a ratio and a time difference between the Q component formed by an indirect wave and the Q component formed by the direct wave in a Q channel, respectively, on the basis of the real part, the imaginary part, and the PN sequence supplied to the I correlation circuit and the Q correlation circuit. The equalizer adaptively equalizes by the data obtained by the I correlation circuit and the Q correlation circuit.
REFERENCES:
patent: 4669091 (1987-05-01), Nossen
patent: 6031866 (2000-02-01), Oler et al.
patent: 6222878 (2001-04-01), McCallister et al.
patent: 6246715 (2001-06-01), Park et al.
patent: 6693951 (2004-02-01), Gilhousen et al.
patent: 6693953 (2004-02-01), Cox et al.
patent: 6741643 (2004-05-01), McGibney
patent: 6879630 (2005-04-01), Kokuryo et al.
patent: 2002/0067783 (2002-06-01), Sung
patent: 2002/0118728 (2002-08-01), Mohseni et al.
Propagation considerations for the design of an indoor broad-band communications system at EHF Bultitude, R.J.C.; et al.; Vehicular Technology, IEEE Transactions on vol. 47, Issue 1, Feb. 1998 pp. 235-245.
Interference-robust serial dual-path threshold referenced architecture for PN acquisition Deng, C.; Chien C.; Global Telecommunications Conference, 1998. GLOBECOM 98. The Bridge to Global Integration. IEEE vol. 5, Nov. 8-12, 1998 pp. 2756-2761 vol.
Ghebretinsae Temesghen
Lerner David Littenberg Krumholz & Mentlik LLP
Sony Corporation
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