Secondary radar digital monopulse receiving apparatus and method

Details Secondary radar digital monopulse receiving apparatus and method Secondary radar digital monopulse receiving apparatus and method

1995-11-20

1997-04-08

Sotomayor, John B.

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

Air traffic control

Secondary surveilance radar

342 80, 342149, 342152, 342194, G01S 1391

Patent

active

056192061

ABSTRACT:
A secondary radar uses monopulse reception techniques to improve the estimate of the aircraft position and to improve the reliability of the reply decoding process. Digital signal processing techniques are utilized to replace the analog circuit used in the prior implementations. The secondary radar implements monopulse processing using a half angle phase method wherein the sum and difference signals are encoded in a complete phasor. The detection of the signal and extraction of the azimuth angle data is implemented using a digital receiver concept. The complex phasor is sampled at an intermediate frequency, down converted to baseband and detected. The azimuth angle is computed using arithmetic methods implemented by digital signal processing circuitry.

REFERENCES:
patent: 4710774 (1987-12-01), Gunny
patent: 4719465 (1988-01-01), Kuroda
patent: 5182563 (1993-01-01), Blinchikoff et al.
patent: 5196855 (1993-03-01), Kuroda
patent: 5341139 (1994-08-01), Billaud et al.
patent: 5374932 (1990-12-01), Wyschogrod et al.
patent: 5528244 (1996-06-01), Schwab

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