METHOD FOR REALIZING HIGH RESOLUTION ANALYSIS OF A SPACE AREA USING A FREQUENCY AGILE PULSE WAVE

摘要

The method described consists in emitting M patterns of K pulses of the same duration, with a recurrence period T. The emission frequencies of any two pulses k and k 'of the same pattern m are defined by the relation P (k) -P (k ') = S (k, k'), where S (k, k ') represents any function of k and k' independent of m and where P (k) represents a realization of random draws, all different , frequencies emitted for the K recurrences of the motif m. The method then consists in performing a fine distance and doppler analysis of the signal received in each of the distance gates formed on reception, the analysis being based on the fact that, given the shape of the wave emitted and the character scattered reflectors capable of reflecting the transmitted wave, the received signal can be represented, for each fine analysis cell, by the sum of a useful signal, representing the signal coming from the zone of the space actually corresponding to this cell, a spurious signal and noise.