Pulse or digital communications – Transmitters
Reexamination Certificate
2006-07-18
2006-07-18
Bayard, Emmanuel (Department: 2638)
Pulse or digital communications
Transmitters
Reexamination Certificate
active
07079588
ABSTRACT:
An antenna system (10), includes a plurality of antenna elements (21–25). Respective analog signals corresponding to respective antenna elements are subjected to respective phase shifts, are digitized using one-bit samples, are then subjected to an equal and opposite phase shift, and are subsequently combined so that the fundamental components add coherently and the harmonic components add noncoherently. A digital-to-analog converter is supplied with successive samples, and produces in response to each sample a pulse having a duration which is less than the time period between successive samples.
REFERENCES:
patent: 3887918 (1975-06-01), Bailey
patent: 4688045 (1987-08-01), Knudsen
patent: 4749995 (1988-06-01), Hopwood et al.
patent: 4839652 (1989-06-01), O'Donnell, et al.
patent: 4886069 (1989-12-01), O'Donnell
patent: 4983970 (1991-01-01), O'Donnell, et al
patent: 5084708 (1992-01-01), Champeau et al.
patent: 5223843 (1993-06-01), Hutchinson
patent: 5271034 (1993-12-01), Abaunza
patent: 5414433 (1995-05-01), Chang
patent: 5461389 (1995-10-01), Dean
patent: 5475392 (1995-12-01), Newberg et al.
patent: 5517529 (1996-05-01), Stehlik
patent: 5764187 (1998-06-01), Rudish et al.
patent: 5930299 (1999-07-01), Vannatta et al.
patent: 5943010 (1999-08-01), Rudish et al.
patent: 6031485 (2000-02-01), Cellai et al.
patent: 6052085 (2000-04-01), Hanson et al.
patent: 6091941 (2000-07-01), Moriyama et al.
patent: 6141371 (2000-10-01), Holmes et al.
patent: 6160505 (2000-12-01), Vaishampayan
patent: 6191735 (2001-02-01), Schineller
patent: 6198731 (2001-03-01), Hamada et al.
patent: 6201451 (2001-03-01), Hata
patent: 6240122 (2001-05-01), Miyashita
patent: 6249249 (2001-06-01), Obayashi et al.
patent: 6259253 (2001-07-01), Ellingson
patent: 6396884 (2002-05-01), Maruyama
patent: 6430232 (2002-08-01), Patire
patent: 6549566 (2003-04-01), Lee et al.
patent: 6570441 (2003-05-01), Sasaki
patent: 6631174 (2003-10-01), Asahara et al.
patent: 6693980 (2004-02-01), Linder et al.
patent: 6771709 (2004-08-01), Huang et al.
patent: 2003/0095608 (2003-05-01), Duperray
patent: 2004/0166813 (2004-08-01), Mann et al.
patent: 2 130 798 (1984-06-01), None
patent: 2 313 711 (1997-12-01), None
patent: WO-01/67548 (2001-09-01), None
U.S. Appl. No. 09/519,069, filed Mar. 3, 2000, entitled “Digital Phased Array Architecture and Associated Method”, by inventor Gary A Frazier, text pp. 1-31 and 3 drawing sheets.
Wong, A.C.C., “Radar Digital Beamforming”, Standard Telecommunication Laboratories, Harlow, Essex, U.K., Military Microwaves Conference 1982, Oct. 20, 1983, cover sheet and pp. 287-294.
Caputi, William J., “Stretch: A Time-Transformation Technique”, IEEE Transactions on Aerospace and Electronic Systems, vol. AES-7, No. 2, Mar. 1971, pp. 269-278.
Brown, et al., “Digital L-Band Receiver Architecture With Direct RF Sampling”, IEEE Position Location and Navigation Symposium, Apr. 1994, pp. 209-216 plus IEEE abstract sheet.
Song, William S., “A New 3-GSPS 65-GOPS UHF Digital Radar Receiver and Its Performance Characteristics”, Thirty-First Asilomar Conference on Signals, Systems & Computers, Nov. 1997, vol. 2, pp. 1542-1546 plus IEEE abstract sheet.
Thompson, Rick et al., “An 8-Bit 2-Gigasample/Second A/D Converter Multichip Module for Digital Receiver Demonstration on Navy AN/APS-145 E2-C Airborne Early Warning Aircraft Radar”, IEEE Trans on CPMT Part B, vol. 21, No. 4, Nov. 1998, pp. 447-462.
Brinegar, C., et al. “Design of an Integrated RF Filter for the Direct Digization Front End of a Dual GPS/GLONASSS Software Radio Receiver”, IEEE RAWCON '98 Proceedings, Aug. 1998, cover sheet and pp. 277-280.
Ho, K.C., et al., “A Digital Quadrature Demodulation System”, IEEE Trans. on AES, vol. 32, No. 4, Oct. 1996, pp. 1218-1227.
U.S. Appl. No. 09/567,543, filed May 5, 2000, entitled “Phased Array Antenna Data Re-Alignment”, by inventors G. Van Andrews, et al., 22 pages of text and 4 drawing sheets.
U.S. Appl. No. 09/478,035, filed Jan. 5, 2000, by inventors James R. Toplicar et al., entitled “Method and Apparatus for a Digital Phased Array Antenna”.
Guirong, et al. “Mixer-free All Digital Quadrature Demodulation”, IEEE Proceedings of the Fourth International Conference on Signal Processing (ICSP), Oct. 12, 1998, vol. 2, pp. 1704-1707 and an index sheet.
Brown, A. et al., “Digital Downconversion Test Results with a Broadband L-Band GPS Receiver”, IEEE Digital Avionics Systems Conf. Oct. 1994, cover sheet and pp. 426-431.
Eerola, V. et al., “Direct Conversion Using Lowpass Sigma-Delata Modulation”, Proc. IEEE Int'l Symposium on Circuits and Systems, May 1992, cover sheet and pp. 2653-2656.
Steyskal, Hans, “Digital Beamforming at Rome Laboratory”, Microwave Journal, U.S. Horizon House, Dedham, vol. 176, No. 2, Feb. 1996, pp. 100, 104, 107-8, 110, 113-4, 116, 119-120, 122,-124, 126.
Doucette Paul E.
Ikeda Roger M.
Toplicar James R.
Baker & Botts L.L.P.
Bayard Emmanuel
Raytheon Company
LandOfFree
Method and apparatus for processing signals in an array... 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 processing signals in an array..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for processing signals in an array... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3609377