Phase measurements using pseudo-random code

Details Phase measurements using pseudo-random code Phase measurements using pseudo-random code

1985-11-01

1990-06-12

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

By combining or comparing signals

367124, G01S 380

Patent

active

049339168

ABSTRACT:
Signal phase delay may be accurately measured by transmitting a pseudo-random noise coded reference signal, deriving in-phase and quadrature components of the received coded signal and then separately decoding the in-phase and quadrature components. This technique effectively compresses the transmitted signal pulse to a very narrow width (thereby simplifying discrimination of separate pulses with similar arrival times) while magnifying the pulse amplitude (thereby enhancing the signal to noise ratio).

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Correlation Sonar Using Pseudo-Random Noise Codes, George A. May, 1983; Canadian Contractor Report of Hydrography & Ocean Sciences, No. 14.

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