Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1996-10-03
1999-03-30
Le, Thanh Cong
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
342457, 70207, H04B 726
Patent
active
058900683
ABSTRACT:
The position of a Wireless Transceiver (WT) is estimated using the Time Of Arrival (TOA) at several Monitoring Sites (MS) of the signal transmitted by the WT. Several sites are used to solve for the coordinates of the WT using hyperbolic trilateration. A time reference is used to synchronize the Monitoring Sites (MS). Super-Resolution (SR) techniques are applied to increase the resolution of the TOA estimate obtained via correlation of the received signal at each MS. SR techniques can improve the TOA resolution substantially.
REFERENCES:
patent: 3384891 (1968-05-01), Anderson
patent: 3646580 (1972-02-01), Fuller et al.
patent: 3680121 (1972-07-01), Anderson et al.
patent: 4177466 (1979-12-01), Reagan
patent: 4297701 (1981-10-01), Henriques
patent: 4433335 (1984-02-01), Wind
patent: 4596988 (1986-06-01), Wanka
patent: 4638321 (1987-01-01), Drogin
patent: 4639733 (1987-01-01), King et al.
patent: 4651156 (1987-03-01), Martinez
patent: 4651157 (1987-03-01), Gray et al.
patent: 4728959 (1988-03-01), Maloney et al.
patent: 4742357 (1988-05-01), Rackley
patent: 4791572 (1988-12-01), Green, III et al.
patent: 4818998 (1989-04-01), Apsell et al.
patent: 4870422 (1989-09-01), Counselman, III
patent: 4891650 (1990-01-01), Sheffer
patent: 4908629 (1990-03-01), Apsell et al.
patent: 4916455 (1990-04-01), Bent et al.
patent: 4926161 (1990-05-01), Cupp
patent: 4975710 (1990-12-01), Baghdady
patent: 5003317 (1991-03-01), Gray et al.
patent: 5008679 (1991-04-01), Effland et al.
patent: 5023809 (1991-06-01), Spackman et al.
patent: 5023900 (1991-06-01), Tayloe et al.
patent: 5055851 (1991-10-01), Sheffer
patent: 5095500 (1992-03-01), Tayloe et al.
patent: 5101501 (1992-03-01), Gilhousen et al.
patent: 5126748 (1992-06-01), Ames et al.
patent: 5128623 (1992-07-01), Gilmore
patent: 5153902 (1992-10-01), Buhl et al.
patent: 5208756 (1993-05-01), Song
patent: 5218618 (1993-06-01), Sagey
patent: 5293645 (1994-03-01), Sood
patent: 5317323 (1994-05-01), Kennedy et al.
patent: 5327144 (1994-07-01), Stilp et al.
patent: 5412388 (1995-05-01), Attwood
patent: 5570305 (1996-10-01), Fattouche et al.
patent: 5666662 (1997-09-01), Shibuya
patent: 5724660 (1998-03-01), Kauser et al.
Smith, Jr., William Whitfield, School of Electrical Engineering, Georgia Institute of Technology, Atlanta, Georgia, Passive Location of Mobile Cellular Telephone Terminals, IEEE, CH3031-2/91/0000-0221, 1.001991.
Hata, M., "Empirical Formula for Radio Propagation Loss in Land Mobile Radio Services," IEEE Transactions on Vehicular Technology, vol. VT-29, No. 3, Aug. 1980.
Dumont, L.R., et al., "Super-resolution of Multipath Channels in a Spread Spectrum Location System," IEEE Electronic Letters, vol. 30, No. 19, pp. 1583-1584, Sep. 15, 1994.
Schmidt, R., "Least Squares Range Difference Location," IEEE Transactions on Aerospace and Electronic Systems, vol. 32, No. 1, Jan. 1996.
Turin, G.L. et al., "A Statistical Model of Urban Multipath Propagation," IEEE Transactions on Vehicular Technology, vol. VT-21, No. 1, Feb. 1972.
Smith, J.O. et al., "Closed-Form Least-Squares Source Location Estimation from Range-Difference Measurements," IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-35, No. 12, Dec. 1987.
Ziskind, I. et al., "Maximum Likelihood Localization of Multiple Sources by Alternating Projection," IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-36, No. 10, Oct. 1988.
Morley, G.D. et al., "Improved Location Estimation with Pulse-ranging in Presence of Shadowing and Multipath Excess-delay Effects," Electronics Letters, vol. 31, No. 18, pp. 1609-1610, Aug. 1995.
Astridge Mark
Borsodi Andrew L.
Fattouche Michel T.
Klukas Richard W.
Lachapelle Gerard J.
Cell-Loc Inc.
Cong Le Thanh
LandOfFree
Wireless location system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wireless location system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wireless location system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1224791