Communications: directive radio wave systems and devices (e.g. – Determining distance – With pulse modulation
Patent
1993-06-21
1994-12-27
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Determining distance
With pulse modulation
342162, 342203, 342136, G01S 1328, G01S 1342
Patent
active
053769392
ABSTRACT:
A radar system simultaneously transmits first and second signals toward a target at higher and lower carrier frequencies, respectively. Each carrier is phase-modulated by a set of pulses. The first set of pulses is dispersed in time, and the second set of pulses is mutually complementary thereto. The transmitted pulses are reflected by the target and received simultaneously. The received signals are processed separately by Doppler filtering. Each Doppler-filtered return is code-matched filtered, and the filtered signals in each Doppler channel are summed with the corresponding Doppler-and-code-matched-filtered signals originating from the other transmitted frequency, to form range signals. Each range signal has its main lobe enhanced and its sidelobes suppressed by the summing of the code-matched-filtered mutually complementary echoes.
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Martin Marietta Corporation
Meise W. H.
Nieves C. A.
Sotomayor John B.
Young S. A.
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