Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2004-04-26
2010-11-02
Payne, David C (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
Reexamination Certificate
active
07826514
ABSTRACT:
A radio transmitter-receiver wherein a pilot symbol is used in the transmitter that has undergone M-chip spreading on the frequency axis and N-chip spreading on the time axis by a spreading code of M×N chip length (where M and N are any integers equal to or greater than 2), and in the receiver, a spreading code that is not used in spreading said pilot signal is used as a despreading code to despread a received signal and then estimate noise and interference power. The spreading code that is used to spread the pilot symbol and the despreading code that is used in despreading are assigned so as to be orthogonal even if only in N chips on the time axis.
REFERENCES:
patent: 2004/0028007 (2004-02-01), Sumasu et al.
patent: 2004/0042386 (2004-03-01), Uesugi et al.
patent: 2004/0071078 (2004-04-01), Sudo
patent: 2000-091986 (2000-03-01), None
patent: 2001-024618 (2001-01-01), None
patent: 2001-028557 (2001-01-01), None
patent: 2001-144724 (2001-05-01), None
patent: 2001-168837 (2001-06-01), None
patent: 2001-197037 (2001-07-01), None
patent: 2001-203664 (2001-07-01), None
patent: 2002-198902 (2002-07-01), None
patent: 2002-271296 (2002-09-01), None
patent: 2003-046474 (2003-02-01), None
patent: 2003-046481 (2003-02-01), None
patent: 2004-193670 (2004-07-01), None
patent: 2001-0110459 (2001-12-01), None
Xiao et al (“A Novel MC-2D-CDMA Communication Systems and Its Detection Methods” 2000 IEEE International Conference on Communications, Publication Date: 2000 vol. 3, on pp. 1223-1227).
Lei Xiao et al, “A Flexible MC-2D-CDMA Communication System Under Rayleigh Fading Channel”, The Proceedings of PIMRC 1999, pp. 498-502.
Hiroyasu Sano et al, “SB-11 Wireless Access Techniques and Broadband Mobile Communication Systems”, IEEE, Nagoya Institute of Technology, Sep. 7, 2000. p. 378.
Hiroyasu Sato et al., “Multicarrier CDMA scheme which performs time and frequency spreading”, Proceedings of the 2000 Institute of Electronics, Information and Communication Engineers Society Conference 1, Sep. 7, 2000, p. 378, B-5-90.
Atarashi Hiroyuki
Kakura Yoshikazu
Maeda Noriyuki
Yoshida Shousei
NEC Corporation
Nguyen Leon-Viet Q
NTT DoCoMo Inc.
Payne David C
Sughrue & Mion, PLLC
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