Coded data generation or conversion – Sample and hold
Patent
1996-12-12
1998-10-06
Hoff, Marc S.
Coded data generation or conversion
Sample and hold
342192, G01S 1300
Patent
active
058183710
ABSTRACT:
A method and system for synchronization of pulse groups without a synchronization signal which comprises selecting a plurality of equal time length coherent processing intervals from a stream of data in the time domain, generally analog data. The data in each of the coherent processing intervals is sampled during each of N equal pulse repetition intervals to provide samples of data, each sampling taking place for an equal portion of the pulse repetition interval. Each of the samples of data is identified according to the position thereof in the associated coherent processing interval. The time domain data is converted to frequency domain data on the basis of the position of the time domain data in the coherent processing interval, all of the samples with the same position in a different coherent processing interval being separately collectively converted. The frequency domain data is then compensated for phase rotation by determining the length of the coherent processing interval, the length of the pulse repetition interval and the duration of the sampling and altering the phase of the frequency domain data in response thereto. An FFT is provided of selected ones of the frequency domain data. The results of the FFT of the selected ones of the frequency domain data are then displayed.
REFERENCES:
patent: 4620192 (1986-10-01), Collins
patent: 4791404 (1988-12-01), Hollister
patent: 5539412 (1996-07-01), Mendelson
patent: 5563601 (1996-10-01), Cataldo
patent: 5646623 (1997-07-01), Walters et al.
Holmes Jerry D.
Lu Chyi Haw
Scott Hugh L.
Hoff Marc S.
Raytheon TI Systems Inc.
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