Telephonic communications – Audio message storage – retrieval – or synthesis
Patent
1994-08-23
1997-04-15
Kuntz, Curtis
Telephonic communications
Audio message storage, retrieval, or synthesis
379 59, 455 331, 455 332, 455 333, 455 334, 370331, H04Q 722
Patent
active
056217862
ABSTRACT:
A passive handoff cellular communication system includes a cell divided into a plurality of zones. A base station is connected by transmission apparatus to a plurality of antenna units. The base station includes analog RF signal generation circuitry for generating a plurality of RF signals on different channels and a first switch responsive to a first control signal for switching and combining the RF signals to form a composite RF signal for each zone. Analog-to-digital conversion circuitry converts the composite signal for each zone to a digitized stream of samples and applies the samples to the transmission apparatus for transmission to each corresponding antenna unit. Each antenna unit includes digital-to-analog conversion circuitry for receiving the digitized stream of samples from the base station, reconstructing a corresponding composite analog RF signal, and applying an amplified signal to the antenna The base stations further include a second switch and combining means responsive to a second control signal for selectively combining the RF signals from the antenna units to form a plurality of composite signals for application to the receivers of the base station. A controller monitors the digitized streams of samples from all of the antenna units, digitally analyzes the energy level of each channel in each zone, and generates the first and second control signals to selectively control the zones in which each channel is broadcast and the zone from which each channel is received.
REFERENCES:
patent: 5193109 (1993-03-01), Lee
patent: 5339184 (1994-08-01), Tang
patent: 5381459 (1995-01-01), Lappington
41st IEEE Vehicular Technology Conference, May 19-22, 1991, Gateway to the Future Technology, 91CH2944-7, British Telecom Research Laboratories, R P Merrett, A J Cooper & I C Symington, "A Cordless Access System Using Radio-Over-Fibre Techniques," pp. 921-924.
1993 43rd IEEE Vehicular Technology Conference, May 18-20, 1993, Personal Communication--Freedom Through Wireless Technology, Waseca Technology Inc., Philip M. Wala, published May 18, 1993, "A New Microcell Architecture Using Digital Optical Transport," pp. 585-588.
1993 43rd IEEE Vehicular Technology Conference, May 18-20, 1993, Personal Communication--Freedom Through Wireless Technology, PacTel Corporation, W.C.Y. Lee, Terry Benz, Ron Rudokas, published May 18, 1993, "Intelligent Microcell Applications In PCS," pp. 722-725.
Vehicular Technology Society 42nd VTS Conference Frontiers of Technology, From Pioneers to the 21st Century, GTE Laboratories Incorporated, Vincent O'Byrne, "TDMA and CDMA in a Fiber-Optic Environment," vol. 2 of 2, pp. 727-731. (May 10, 1992).
Brennan Jeffrey
Fischer Larry G.
Wala Philip M.
ADC Telecomminications, Inc.
Kuntz Curtis
Oehling G. J.
LandOfFree
Cellular communications system having passive handoff does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cellular communications system having passive handoff, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cellular communications system having passive handoff will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-367560