Digital range measurement system

Details Digital range measurement system Digital range measurement system

1992-10-02

1993-09-21

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With time interval measuring means

G01S 1500

Patent

active

052474895

ABSTRACT:
A digital range measuring system utilizes a digital signal processing prosor in connection with a precision time standard to generate a unique, characterizing frequency signal for transmission through a medium such as a body of water, at precisely known time intervals wherein a received signal at a second, different DRMS performs a predetermined number of frequency domain analyzations on the received signal to detect the presence of a known, unique frequency signal representative of at least one originating DRMS. Each of the frequency domain analyzations are time identified so that the one frequency domain analyzation during which the presence of the known frequency is detected is used to determine the time of detection. A personal computer is coupled to the digital signal processing processor and uses the time of detection in calculating the range between the receiver and the originating transmission.

REFERENCES:
patent: 4513401 (1985-04-01), Ottsen et al.
patent: 4516226 (1985-05-01), Peynaud et al.

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