Communications: directive radio wave systems and devices (e.g. – Plural radar
Patent
1992-10-19
1994-04-12
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Plural radar
G01S 1300
Patent
active
053029550
ABSTRACT:
An apparatus for combining signals from a plurality of radar installations is described. A methodology for combining signals from a pluraltiy of radar installations/sensors has been developed. This methodology provides enhanced target detection performance by properly fusing together the commensurate range-Doppler filter bins of each sensor. In this methodology, the processing of each of the individual radars in the Doppler frequency domain is provided such that a common velocity domain is obtained from each of the radars. Using a zero fill discrete Fourier transform, the velocity domain obtained from each radar is further normalized to have a common bin size. Additionally, for the higher frequency radars, the normalized velocity bins are unfolded so that each radar signal produces the same number of velocity bins in its respective velocity domain. Once the common velocity coordinate has been obtained a vector addition of the resulting velocity bins produces a common radar velocity signal which can be detected and processed. Combining radar signals before detection results in a gain in sensitivity over systems which combine signals after detection.
REFERENCES:
patent: 4683474 (1987-07-01), Randig
Kadar Ivan
Koutsoudis Theodore
Schutte Peter C.
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