Robust iterative technique for high-resolution spatial processing and spectral estimation
Patent 4648057 Issued on March 3, 1987. Estimated Expiration Date: 
May 18, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 18, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3573446 3876946 Frequency domain adaptive filter for detection of sonar signals Beam-former for FFT-based signal processor Micro fracture detector Method and apparatus for random array beamforming Patent #: 4559605 InventorsApplicationNo. 06/611811 filed on 05/18/1984US Classes:708/403, Fourier342/192, Spectrum analysis702/76Frequency spectrumExaminersPrimary: Malzahn, David H.Attorney, Agent or FirmInternational ClassesG06F 17/00 (20060101)G01S 7/534 (20060101) AbstractA nonlinear technique for high-resolution data processing produces high-rlution power spectra from the output of a conventional processor. First, a "guess" of the spectral estimate is formed. Then the spectral estimate is convolved with the system response function to produce estimated output levels. The differences between the estimated output levels and the measured output levels are used to modify the spectral estimate to produce a new "guess". This process is repeated until certain criteria are satisfied. | |
