Process for range measurement with a pulse radar of high pulse r

Details Process for range measurement with a pulse radar of high pulse r Process for range measurement with a pulse radar of high pulse r

1988-03-30

1990-04-10

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Determining velocity

Combined with determining distance

342131, 342194, 342196, G01S 1346, G01S 1324

Patent

active

049164520

ABSTRACT:
With a frequency-agile pulsed doppler radar with high pulse repetition frequency (HPRF) in the unambiguous velocity region, in order to measure the range of a target the complex time signal derived from the echo signals of a coherent processing interval (CPI) is transformed into the frequency domain, the transformed spectrum is multiplied by a bandpass function with a mean frequency coinciding with the doppler frequency of the target, and the product is transformed back into a time signal. The real envelope of this re-transformed time signal displays a definite leading edge and a steady state region, from which the echo travel time can be estimated. Particular advantages may be derived for the pulsed doppler radar set from a plurality of frequency agile transmitter/receivers operated at the same time at different frequencies, and whose frequency switching times are time-staggered.

REFERENCES:
patent: 4063238 (1977-12-01), Conner, Jr.
patent: 4106019 (1978-08-01), Alexander et al.
patent: 4375641 (1983-03-01), Josefsson et al.
patent: 4746922 (1988-05-01), Prenat

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