Method and system for locating an unknown transmitter using cali

Details Method and system for locating an unknown transmitter using cali Method and system for locating an unknown transmitter using cali

1994-12-01

1997-01-14

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

342378, 342174, 342357, 342358, H04B 7185

Patent

active

055944523

ABSTRACT:
In a method and system for locating an unknown transmitter which emits an interfering signal, multiple signals, including a phase-calibrating signal and the interfering signal, are simultaneously observed within a passband. These signals are then simultaneously cross-correlated. The phase-calibrating signal is then isolated from the cross-correlated signals and processed to determine an amount of offset to compensate for frequency fluctuations between local oscillators in satellites, which receive and retransmit the phase-calibrating signal and the interfering signal.

REFERENCES:
patent: 3593183 (1971-07-01), Kravchenko et al.
patent: 4740792 (1988-04-01), Sagey et al.
patent: 4751512 (1988-06-01), Longaker
patent: 5008679 (1991-04-01), Effland et al.
patent: 5379320 (1995-01-01), Fernandes et al.
patent: 5467282 (1995-11-01), Dennis
John M. Gipson et al., "Interference Location By Pre-Detection TDOA And FDOA Measurements," Interferometrics, Inc. Proposal Number 8903-21, pp. 1-24, Mar., 1989.
Interferometrics, Inc., Proposal for "Construction of a Satellite Transmitter Location System (TLS)," pp. 1-24, Nov., 1992.

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