Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Patent
1994-10-26
1997-01-07
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
342457, 342446, G01S 302
Patent
active
055921809
ABSTRACT:
A special mobile radio mobile, vehicle or personal location system is described where the system operates to locate any one of a the transmitters in an SMR system. The present invention operates by identifying the received signals, removing the modulation information to reconstruct a demodulated carrier and analyzing the carrier signals for multipath distortion. The multipath disruptions are removed to calculate the true incident angle of the transmitted signal at a base station. A plurality of base stations are used to simultaneously calculate the incident angle of the transmitted SMR signal and a central location calculates the most probable location of the transmitter based upon triangulation. The incident angle of the transmitted SMR signal at each base station is performed by calculating the phase differences of the incoming voice signal with phase ambiguity minimized by using a plurality of dipole antennas spaced at an irregular distance to eliminate phase ambiguity error.
REFERENCES:
patent: 2437695 (1948-03-01), Jansky
patent: 3445847 (1969-05-01), Hammack
patent: 3747104 (1973-07-01), Pansini
patent: 3864681 (1975-02-01), Olive
patent: 3886554 (1975-05-01), Braun et al.
patent: 3972042 (1976-07-01), Johnson
patent: 4114155 (1978-09-01), Raab
patent: 4188629 (1980-02-01), Johnson
patent: 4217586 (1980-08-01), McGuffin
patent: 4229620 (1980-10-01), Schaible
patent: 4369426 (1983-01-01), Merkel
patent: 4449127 (1984-05-01), Sanchez
patent: 4494119 (1985-01-01), Wimbush
patent: 4596988 (1986-06-01), Wanka
patent: 4665379 (1987-05-01), Howell et al.
patent: 4665404 (1987-05-01), Christy et al.
patent: 4698781 (1987-10-01), Cockerell, Jr.
patent: 4728959 (1988-03-01), Maloney et al.
patent: 4740792 (1988-04-01), Sagey et al.
patent: 4742357 (1988-05-01), Rackley
patent: 4791572 (1988-12-01), Green, III et al.
patent: 4799062 (1989-01-01), Sanderford et al.
patent: 4891650 (1990-01-01), Sheffer
patent: 4905271 (1990-02-01), Namekawa
patent: 4916455 (1990-04-01), Bent et al.
patent: 5003317 (1991-03-01), Gray et al.
patent: 5021794 (1991-06-01), Lawrence
patent: 5055851 (1991-10-01), Sheffer
patent: 5081667 (1992-01-01), Drori et al.
patent: 5099245 (1992-03-01), Sagey
patent: 5208756 (1993-05-01), Song
patent: 5218367 (1993-06-01), Sheffer et al.
patent: 5311197 (1994-05-01), Sorden et al.
patent: 5317323 (1994-05-01), Kennedy et al.
patent: 5327144 (1994-07-01), Stilp et al.
patent: 5365451 (1994-11-01), Wang et al.
patent: 5365516 (1994-11-01), Jandrell
patent: 5379047 (1995-01-01), Yokev et al.
patent: 5396540 (1995-03-01), Gooch
Ernest Jacobs, et al., "Ambiguity Resolution in Interferometry", IEEE Transactions on Aerospace and Electronic Systems, 17, No. 6, pp. 776/780, dated Nov. 1981.
Mati Wax et al., "Decentralized Processing in Sensory Arrays", IEEE Transactions on Acoustics, Speech, and Signal Processing, ASSP-33, No. 4, pp. 1123-1129, dated Oct. 1985.
Harel Haim
Meiman Yehouda
Peleg Shimon
Yokev Hanoch
Nexus1994 Limited
Pham Dao L.
Tarcza Thomas H.
LandOfFree
Direction finding and mobile location system for trunked mobile does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Direction finding and mobile location system for trunked mobile , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direction finding and mobile location system for trunked mobile will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1768098