초록 ▼

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

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.

대표청구항 ▼

[ We claim:] [1.] A method of synchronization of pulse groups without a synchronization signal comprising the steps of:(a) selecting a plurality of equal time length coherent processing intervals from a stream of data in the time domain;(b) sampling the data in each of said coherent processing inter

[ We claim:] [1.] A method of synchronization of pulse groups without a synchronization signal comprising the steps of:(a) selecting a plurality of equal time length coherent processing intervals from a stream of data in the time domain;(b) sampling the data in each of said coherent processing intervals during each of N equal pulse repetition intervals to provide samples of data, each sampling taking place for an equal portion of a said pulse repetition interval;(c) identifying each of said samples of data according to the position thereof in the associated coherent processing interval;(d) converting the time domain data to frequency domain data on the basis of said position, all of said samples with the same position in a different coherent processing interval being separately collectively converted;(e) compensating said frequency domain data for phase rotation; and(f) providing an FFT of selected ones of said frequency domain data.