Patents by Inventor Arthur I. Zygielbaum

Arthur I. Zygielbaum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Digital demodulator-correlator
    Patent number: 4112497
    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.M2 = 10 mhz Reference .multidot. Receiver Code .angle.90.degree.The correlation functions that are used for the range measurements are then computed from the following equations:I = S1.sub.I cos .alpha. - S2.sub.I sin .alpha.Q = S1.sub.Q cos .alpha. - S2.sub.Q sin .alpha.where sin .alpha. and cos .alpha.
    Type: Grant
    Filed: March 29, 1977
    Date of Patent: September 5, 1978
    Inventors: James C. Administrator of the National Aeronautics and Space administration, with respect to an invention of Fletcher, James W. Layland, Warren L. Martin, Arthur I. Zygielbaum, Richard M. Goldstein, William P. Hubbard