An apparatus was designed for the demodulation and correlation of a code modulated signal with respect to a reference signal in ranging systems for tracking spacecraft or aircraft, or surveying. In conjunction with simultaneous operation of three tracking stations, enough accuracy may be achieved to implement an aircraft collision avoidance system. The demodulator correlator may also be used for telemetry in a system where a transponder at a remote station delays transmission of a return code for a period proportional to an analog signal from a transducer. More than one transducer may be accommodated by using frequency division multiplexing techniques.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Digital Demodulator-Correlator


    Contributors:

    Publication date :

    1977


    Size :

    35 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Digital Synchronous Demodulator

    Woodhouse, Christopher E. | NTRS | 1992


    Digital Demodulator For Advanced Receiver

    Sadr, Ramin / Hurd, William J. | NTRS | 1990


    Binary Quantized Digital BPSK Demodulator

    Kumar, A. R. / Pujari, V. K. / Lakshminarasimhan, P. et al. | British Library Conference Proceedings | 2006


    All-digital sequence correlator

    Laderman, A. | NTRS | 1977


    An all digital demodulator for telemetry signals

    Boucheret, M.-L. / Mortensen, I. / Lesthievent, G. et al. | British Library Conference Proceedings | 1995