Pulse or digital communications – Spread spectrum
Reexamination Certificate
2005-02-01
2005-02-01
Le, Amanda T. (Department: 2634)
Pulse or digital communications
Spread spectrum
C375S346000, C342S134000, C342S137000, C342S192000, C342S195000
Reexamination Certificate
active
06850552
ABSTRACT:
Simultaneous improvement in resolution, frequency range, dynamic ranges, as well as signal-to-noise ratio of spectrum analysis is possible by the huge increase in speed and capacity of digital data processing. In coherent pulse sounding (especially in monostatic Radar and Sonar), precise determination of the frequency, amplitude, and phase of wanted signals and unwanted interferers in the frequency domain and their elimination in the time domain data set leads to substantial improvement in the dynamic range of the analysis. Thus, a new apparatus and method of unevenly spaced transmitter pulses becomes feasible to increase the number of samples in a time period limited by the coherency requirements of the data set. The invented apparatus and method overcomes the inherent limitation in dynamic range of the spectral amplitudes due to cross-talk and sparse sampling. Non-linear spectrum analysis can improve signal-to noise further. Pre-cleaning of spread-spectrum data is another application of this method.
REFERENCES:
patent: 4594695 (1986-06-01), Garconnat et al.
patent: 4613978 (1986-09-01), Kurth et al.
patent: 4792915 (1988-12-01), Adams et al.
patent: 4803994 (1989-02-01), Burke
patent: 4837720 (1989-06-01), Rambaut
patent: 4843583 (1989-06-01), White et al.
patent: 4942546 (1990-07-01), Rambaut
patent: 5018088 (1991-05-01), Higbie
patent: 5227801 (1993-07-01), Pierce
patent: 5233354 (1993-08-01), Roth et al.
patent: 5353233 (1994-10-01), Oian et al.
patent: 5412390 (1995-05-01), Peavey et al.
patent: 5545976 (1996-08-01), Cutler
patent: 5602751 (1997-02-01), Edelblute
patent: 5691924 (1997-11-01), Czyzewski et al.
patent: 5748143 (1998-05-01), Melvin, Jr. et al.
patent: 5831569 (1998-11-01), Schultheis et al.
patent: 6081221 (2000-06-01), Zrnic et al.
patent: 6307500 (2001-10-01), Cornman et al.
patent: 20030048901 (2003-03-01), Cangiani et al.
Capon, J., High-Resolution Frequency-Wavenumber Spectrum Analysis, Proceedings of the IEEE, vol. 57, No. 8, Aug. 1969, pp. 1408-1419.
Burg, J.P., Maximum Entropy Spectral Analysis, paper presented at 37th Meeting of the Society of Exploration Geophysicists, Oklahoma City, Oklahoma, 1967, Modern Spectrum Analysis, edited by Donald G. Childers, IEEE Press, pp. 34-41.
Kanasewich, E.R., Time Sequence Analysis In Geophysics, 3rd Edition, 1981, The University Of Alberta Press, pp. 143-183.
Kay, S.M., Modern Spectral Estimation, Theory & Application, 1998, Prentice Hall, Englewood Cliffs, NJ, pp. 431-439.
Haykin, S., Editor, Advances in Spectrum Analysis and Array Processing, vol. II, Prentice Hall Advanced Reference Series, Prentice Hall, Englewood Cliffs, NJ, pp. 263-273.
Schmidt, Ralph Otto; A Signal Subspace Approach To Multiple Emitter Location And Spectral Estimation; Ph.D. Dissertation, Stanford University; Nov. 1981; cover pages, pp. v-xii, pp. 1-201; Copyright Ralph Otto Schmidt 1982.
Bibl, Klaus and Haines, Mark D.; 1024-Chip Staggered Pulse Code For Spacecraft Ionosondes And Radar; University of Massachusetts-Lowell, Center for Atmospheric Research; 600 Suffolk Street; Lowell, MA 01854; Honoring Prof. Bodo W. Reinisch at his 60th birthday.; pp. 1, 2,4,5-7 and pp. 2-7.
Search Report for PCT/US01/45682 mailed Mar. 22, 2002, 1 page.
Blakely & Sokoloff, Taylor & Zafman
Le Amanda T.
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