Communications: directive radio wave systems and devices (e.g. – Determining direction – Low angle processing
Patent
1993-01-14
1994-08-23
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Determining direction
Low angle processing
342149, 342150, 342152, 342194, G01S 1344
Patent
active
053411455
ABSTRACT:
In a method for tracking a radar target the imaginary part of the complex elevation error signal is utilized and the value of the complex elevation error signal is calculated for a plurality of frequencies in a repeated sequence. The value change between the different frequencies is used for determining the position within an unambiguous interval and the values calculated at the zero crossing are utilized as measure of the inclination which in turn is compared with inclinations calculated for zero crossings in a general case, whereby a single-valued (unambiguous) interval and position can be determined and thereby the associated elevation angle or target height can be calculated. The method is specifically useful for tracking at low height where multi-path propagation poses a problem in tracking according to known methods.
REFERENCES:
patent: 3772695 (1973-11-01), Hoffman
patent: 3778829 (1973-12-01), Longuemare, Jr. et al.
patent: 4163975 (1979-08-01), Guilhem et al.
patent: 4646095 (1987-02-01), Kanter
patent: 4719465 (1988-01-01), Kuroda
patent: 4789861 (1988-12-01), Baggett et al.
patent: 4796031 (1989-01-01), Koki
patent: 4862177 (1989-08-01), Wong
patent: 4994810 (1991-02-01), Sinsky
IEEE Transactions on Aerospace and Electronic Systems, AES-7 (1971-01): 1 S. M. Sherman: "Complex Indicated Angles Applied to Unresolved Radar Targets and Multipath", p. 160-p. 170.
Proceedings of the IEEE, vol. 62, No. 6, Jun. 1974, "Low-Angle Radar Tracking", David K. Barton, Fellow IEEE, pp. 687-704.
Eckersten Christer
s Bengt-Olof
NobelTech Electronics AB
Sotomayor John B.
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