Communications: directive radio wave systems and devices (e.g. – Radar ew – Eccm
Reexamination Certificate
2005-03-15
2005-03-15
Sotomayor, John B. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Radar ew
Eccm
C342S149000, C342S379000
Reexamination Certificate
active
06867726
ABSTRACT:
An improvement in monopulse radar achieves nulling of a single mainlobe jammer and multiple sidelobe jammers while maintaining the angle measurement accuracy of the monopulse ratio by cascading a multiple sidelobe canceller and a mainlobe canceller, and imposing a mainlobe maintenance technique during the sidelobe jammer cancellation process so that the results of the sidelobe jammer cancellation process do not distort the subsequent mainlobe cancellation process. In this manner, the sidelobe jammers and the mainlobe jammer are cancelled sequentially in separate processes.
REFERENCES:
patent: 5045858 (1991-09-01), Eberhardt et al.
patent: 5245347 (1993-09-01), Bonta et al.
patent: 5311192 (1994-05-01), Varga et al.
patent: 5359329 (1994-10-01), Lewis et al.
patent: 5600326 (1997-02-01), Yu et al.
Y.T. Lo et al., “Antenna Handbook, Theory, Application, and Design”, Van Nostrand Reinhold Co., N.Y. (1988), Chapter 13.
R.C. Davis et al., “Angle Estimation with Adaptive Arrays in External Noise Field”, IEEE Trans. on Aerospace and Electronic Systems, vol. AES-12, No. 2, Mar. 1976.
R.R. Kinsey, “Monopulse Difference Slope and Gain Standards”, IRE Trans., vol. AP-10, pp. 343-344, May 1962.
C.R. Clark, “Main Beam Jammer Cancellation and Target Angle Estimation with a Polarization-Agile Monopulse Antenna”, 1989 IEEE Radar Conference, Mar. 29-30, 1989, Dallas, TX, pp. 95-100.
S.P. Applebaum et al., “Main Beam Jammer Cancellation for Monopulse Sensors”, Final Tech. Report DTIC RADC-TR-86-267, Dec., 1984.
P.W. Howells, “Exploration in Fixed and Adaptive Resolution at GE and SURC”, IEEE Trans. on Antennas and Propagation, vol. AP-24, No. 5, Sep. 1976, p. 575.
S.P. Applebaum, “Adaptive Arrays”, Syracuse University Research Corporation, TR 66-001, Aug. 1966 (Revised Mar. 1975).
S.P. Applebaum, “Adaptive Arrays”, IEEE Transactions on Antennas and Propagation, vol. AP-24, No. 5, Sep. 1976, pp. 585-598.
Widrow et al., “Adaptive Antenna Systems”, Proc. IEEE, vol. 55, Dec. 1967, pp. 2143-2159.
K. Jablon, “Steady State Analysis of the Generalized Sidelobe Canceler by Adaptive Noise Cancelling Techniques”, IEEE Trans. on Antennas and Propagation, vol. AP-34, pp. 330-337, Mar. 1986.
H. Cox et al., “Robust Adaptive Beamforming”, IEEE Trans. on Acoustics, Speech and Signal Processing, vol. ASSP-35, Oct. 1987, pp. 1365-1375.
B. Widrow et al., “Signal Cancellation Phenomena in Adaptive Arrays: Causes and Cures”, IEEE Trans. on Antennas and Propagation, vol. AP-30, May 1982, pp. 469-478.
T. Shan et al., “Adaptive Beamforming for Coherent Signals and Interference”, IEEE Trans. on Acoustics, Speech and Signal Processing, vol. ASSP-33, Jun. 1985, pp. 527-536.
L. Haupt, “Simultaneous Nulling in the Sum and Difference Patterns of a Monopulse Antenna”, IEEE Trans. on Antennas and Propagation, vol. AP-32, No. 5, May 1984, pp. 486-493.
L. Haupt, “Adaptive Nulling in Monopulse Antennas”, IEEE Trans. on Anetnnas and Propagation, vol. 36, No. 2, Feb. 1988, pp. 202-208.
B. Vu, “Simultaneous Nulling in Sum and Difference Patterns by Amplitude Control”, IEEE Trans. on Antennas and Propagation, vol. 34, No. 2, Feb. 1986.
Murrow David Jay
Yu Kai-Bor
Duane Morris LLP
Lockheed Martin Corporation
Sotomayor John B.
LandOfFree
Combining sidelobe canceller and mainlobe canceller for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Combining sidelobe canceller and mainlobe canceller for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combining sidelobe canceller and mainlobe canceller for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3431974