Boots – shoes – and leggings
Patent
1977-03-29
1978-09-05
Gruber, Felix D.
Boots, shoes, and leggings
329122, 343 14, 364458, 364604, G06F 1534, G01S 938
Patent
active
041124979
ABSTRACT:
Apparatus for demodulation and correlation of a code modulated 10 MHz signal is comprised of a sample and hold analog-to-digital (A/D) converter synchronized by a frequency coherent 40 MHz pulse to obtain four evenly spaced samples A1,B1,A2 and B2 of each cycle of the signal, and means for adding, or subtracting, each sample to, or from, one of four accumulators to form the sums: ##EQU1## where M1 = 10 MHz Reference .multidot. Receiver Code .angle.0.degree.
REFERENCES:
patent: 3659292 (1972-04-01), Low et al.
patent: 3689750 (1972-09-01), Esser
patent: 3812493 (1974-05-01), Afendykiw et al.
patent: 3819919 (1974-06-01), McGunigle
patent: 3955197 (1976-05-01), Gutleber et al.
patent: 3956623 (1976-05-01), Clark et al.
patent: 4025775 (1977-05-01), Beauvais et al.
Fletcher James C. Administrator of the National Aeronautics and Space
Goldstein Richard M.
Hubbard William P.
Layland James W.
Martin Warren L.
Gruber Felix D.
Manning John R.
McCaul Paul F.
Mott Monte F.
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