Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2007-05-08
2007-05-08
Ghayour, Mohammed (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C267S269000, C267S246000, C267S251000, C370S328000, C370S204000
Reexamination Certificate
active
10946657
ABSTRACT:
The present invention involves a method and system for transmitting two levels of data in a hierarchical transmission schema. A first modulated signal is generated based on first input. A second modulation signal is generated based on a second input that has a data rate that is a fraction of the data rate of the first modulated signal. The second modulation signal has known instances where the second modulation signal has no energy. In a system where the first modulation is quadrature phase shift keying (QPSK), the second modulation signal can be a secondary phase offset. A receiver in the system that has a priori knowledge about the timing relationship between the first data signal and the instances when the second data signal is present will be able to detect both data signals optimally.
REFERENCES:
patent: 3973201 (1976-08-01), Andren
patent: 4238849 (1980-12-01), Gassmann
patent: 5646935 (1997-07-01), Ishilawa et al.
patent: 5687166 (1997-11-01), Natali et al.
patent: 5812604 (1998-09-01), Herbst et al.
patent: 5966412 (1999-10-01), Ramaswamy
patent: 6119827 (2000-09-01), Militello et al.
patent: 6373903 (2002-04-01), Wynn
patent: 6510317 (2003-01-01), Marko et al.
patent: 6570858 (2003-05-01), Emmons, Jr. et al.
patent: 6580705 (2003-06-01), Riazi et al.
patent: 6724827 (2004-04-01), Patsiokas et al.
patent: 6785514 (2004-08-01), Raaf
patent: 2002/0122381 (2002-09-01), Wu et al.
patent: 2002/0168026 (2002-11-01), Khoini-Poorfard
patent: 2005/0005120 (2005-01-01), Kahn et al.
patent: 2005/0068918 (2005-03-01), Mantravadi et al.
patent: 2005/0089068 (2005-04-01), Sun et al.
patent: 2005/0135308 (2005-06-01), Vijayan et al.
patent: 2005/0249180 (2005-11-01), Murakami et al.
patent: 2006/0050805 (2006-03-01), Chen et al.
patent: 0594505 (1993-10-01), None
patent: 2004/100479 (2004-11-01), None
Pursley, et al.; “Adaptive Nonuniform Phase-Shift-Key Modulation For Multimedia Traffic in Wireless Networks”; IEEE Journal on Selected Areas in Communications, vol. 18, No. 8, Aug. 2000; pp. 1394-1407.
Vitthaladevuni, et al.; Effect of Imperfect Phase and Timing Synchronization on the Error Rate Performance of PSK Modulations; IEEE Mar. 2002; pp. 356-360.
Hossain, et al.; Hierarchial Modulations for Multimedia and Multicast Transmission over Fading Channels; IEEE Mar. 2003; pp. 2633-2637.
Pursley, et al.; “Nonuniform Phase-Shift-Key Modulation for Multimedia Multicast Transmission in Mobile Wireless Networks”; IEEE Journal on Selected Areas in Communications, vol. 17, No. 5, May 1999, pp. 774-783.
Vitthaladevuni, et al.; “Exact BER Computation of Generalized Hierarchial PSK Constellations”; IEEE Feb. 2002, pp. 1974-1978.
J. Sesna; The DVB satellite, cable and SMATV systems; EBU Technical Review; Winter 1995; pp. 24-38.
Tanner; UBS Looks Southward, UBS, a Canadian Developer of MMDS Equipment, Has Its Eyes on the U.S.; Aug. 2001; www.shorecliffcommunications.com, Broadband Wireless Online, pp. 1-6.
Yoshida; New DVB satelline modulation scheme drops Turbo; Mar. 7, 2003; EETIMESUK, www.electronicstimes.com; p. 1.
Schertz, Weck; Hierarchical modulation—the transmission of two independent DVB-T multiplexes on a single frequency; EBU Technical review; Apr. 2003; pp. 1-13.
DVB Digital Video Broadcasting; DVB, MHP, the DVB logo and the MHP logo are registered trademarks of the Digital Video Broadcasting Project.
Harris Semiconductor; HSP50307 Burst QPSK Modulator; File No. 4219; pp. 1-9; Dec. 1996.
PCT/US04/38309; International Search Report, dated May 19, 2006.
Dibiaso Eric A.
Hiatt, Jr. Michael L.
Walker Glenn A.
Delphi Technologies Inc.
Funke Jimmy L.
Ghayour Mohammed
Ghulamali Qutub
LandOfFree
Method to minimize compatibility error in hierarchical... 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 to minimize compatibility error in hierarchical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method to minimize compatibility error in hierarchical... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3785211