Communications: directive radio wave systems and devices (e.g. – With particular circuit – For pulse modulation
Patent
1990-12-17
1992-06-23
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
For pulse modulation
342 90, 342192, G01S 7288, G01S 7292
Patent
active
051247100
ABSTRACT:
This radar system comprises an emitter (3, 4, 5) for the transmission of coherent non-equidistant pulses forming a periodic pattern and being distinguished from each other by a phase modulation according to different quasi-orthogonal laws, the average interval between pulses being of the order of magnitude of the minimum duration of the flashes. For reception, the system comprises a single receiver (7) and a device (8) for coherent elimination of the clutter and echoes of the target bodies, followed by N processing channels for pulse compression (9.1 to 9.N) by correlation with the particular phase modulation laws. The outputs from the processing channels are sent to a device (11) for elimination of secondary peaks due to partial ambiguities.
The invention applies to radar surveillance systems for helicopter detection.
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patent: 4920347 (1990-04-01), Kurihara
Kretschmer, Jr., "New Radar Pulse Compression Waveforms," Proceedings of the 1988 IEEE National Radar Conference, Ann Arbor, Mich., Apr. 20-21, 1988, pp. 194-199.
Le Centre Thomson d'Applications Radars
Sotomayor John B.
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