Telecommunications – Wireless distribution system – Combined with diverse art device
Reexamination Certificate
2006-06-26
2010-02-02
Dean, Raymond S (Department: 2618)
Telecommunications
Wireless distribution system
Combined with diverse art device
C455S102000
Reexamination Certificate
active
07657225
ABSTRACT:
The present invention provides a method of hierarchically modulating first and second digital data streams in a broadcast system such as an SDAR system that is compatible with legacy receivers. The second digital data stream, but not the first, is provided with a non-binary pseudo-random encoding. A carrier is first modulated, e.g. QPSK, by the first digital data stream; and a second modulation is performed with the encoded second digital data stream. The encoding includes a multiplication of a matrix formed of 2, 3 or 4 consecutive bits of the secondary data stream by a matrix, e.g. a Hadamard matrix to form a product matrix having non-binary values that are used to modify consecutive symbols of the first modulation. The second modulation appears as Gaussian noise to legacy receivers over time.
REFERENCES:
patent: 5315584 (1994-05-01), Savary et al.
patent: 5646935 (1997-07-01), Ishilawa et al.
patent: 5687166 (1997-11-01), Natali et al.
patent: 5966412 (1999-10-01), Ramaswamy
patent: 5987068 (1999-11-01), Cassia et al.
patent: 6118827 (2000-09-01), Wynn
patent: 6119827 (2000-09-01), Militello et al.
patent: 6510317 (2003-01-01), Marko et al.
patent: 6549563 (2003-04-01), McDonough
patent: 6570858 (2003-05-01), Emmons, Jr. et al.
patent: 2005/0005120 (2005-01-01), Kahn et al.
patent: 2005/0089068 (2005-04-01), Sun et al.
patent: 0594505 (1993-10-01), None
patent: 1011245 (2000-06-01), None
patent: 1065854 (2001-01-01), None
patent: 0139456 (2001-05-01), None
patent: 0217615 (2002-02-01), None
patent: 2003024048 (2003-03-01), None
patent: 2004/100479 (2004-11-01), None
Jacques Meyer, chief Architect, Consumer and Micro Group Set Top Box Division STMicroelectronics Inc., “High efficiency modulations for satellite TV”, May 2003.
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, Mar. 1998.
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, USB, 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 satellite modulation scheme drops Turbo; Mar. 7, 2003; EETIMESUK, www.electronicstimes.com; p. 1.
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.
EP Search Report Dated Oct. 2, 2007.
DiBiaso Eric A.
Hiatt, Jr. Michael L.
Walker Glenn A.
Dean Raymond S
Delphi Technologies Inc.
Funke Jimmy L.
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