Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater
Patent
1990-11-13
1993-08-24
Eisenzopf, Reinhard J.
Telecommunications
Carrier wave repeater or relay system
Portable or mobile repeater
455 132, 455 334, 455 572, 455 561, 34082544, H04B 7155, H04B 719
Patent
active
052396711
ABSTRACT:
A paging system includes a satellite uplink (40) for assembling paging information and transmitting it to a satellite (26). The satellite (26) is then operable to transmit in a simulcast manner all the information to various regional paging systems (42). Each of the paging systems (42) includes a plurality of towers (10) each containing a satellite receiver (50), a satellite dish (48) associated therewith and a paging transmitter (52). Each of the satellite receivers (50) are operable to receive the information transmitted from the satellite (26) at substantially the same time such that there is no phase difference between any of the towers, regardless of location. Therefore, the transmitters (50) can transmit through antennas (12) information at the paging frequency with substantially no relative delays relative to each of the antennas (12). A backup link receiver (28) is provided for interfacing with a backup link transmitter (70). In the event of a failure of the receivers (50) or the satellite (26), the link transmitter (70) will transmit the paging information directly to select ones of the towers (10) over a separate frequency.
REFERENCES:
patent: H610 (1989-03-01), Focarile et al.
patent: 4398192 (1983-08-01), Moore et al.
patent: 4578815 (1986-03-01), Persinotti
patent: 4672655 (1987-06-01), Koch
patent: 4747120 (1988-05-01), Foley
patent: 4747122 (1988-05-01), Bhagat et al.
patent: 4829554 (1989-05-01), Barnes et al.
patent: 4918437 (1990-04-01), Jasinski et al.
patent: 4943803 (1980-07-01), Vrijakorte
patent: 4955082 (1990-09-01), Hattori et al.
patent: 4969966 (1990-11-01), Jasinski et al.
patent: 5010317 (1991-04-01), Schwendeman e al.
patent: 5081703 (1992-01-01), Lee
Steven Ritter and J. McCoy, "Automatic Vehicle Location-An Overview", IEEE Trans. on Veh. Tec., vol. VT-26, No. 1, Feb. 1977, pp. 7-9.
M. Kihara, "Performance Aspects of Reference Clock Distribution for Evolving Digital Networks", IEEE Communications Magazine, Apr. 1989.
"Unwanted Calls? Turn on Pager Phone", USA Today, Dec. 28, 1990, p. 8B.
Gardner, W. A. and Chen C. K., "Interference-Tolerant Time-Difference-Arrival Estimation for Modulated Signals", IEEE Trans. on Acous., Speech and Sig. Proc., vol. 36, No. 9, Sep. 1988, pp. 1385-1395.
D. C. Cox, "Universal Digital Portable Radio Communications," Proc. of the IEEE, vol. 75, No. 4, Apr. 1987, pp. 436-477.
Telocator Bulletin, News and Analysis for the Mobile Telecommunications Industry, vol. 91, No. 3, Jun. 25, 1991.
M. Kihira, "Performance Aspects of Reference Clock Distribution for Revolving Digital Networks", IEEE Comm. Magazine, Apr. 1989, pp. 24-34.
Linquist Roger D.
Lorang Malcolm M.
Eisenzopf Reinhard J.
Pagemart, Inc.
Pham Chi H.
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