Telecommunications – Carrier wave repeater or relay system – With transmission line
Patent
1995-03-01
1998-04-07
Eisenzopf, Reinhard J.
Telecommunications
Carrier wave repeater or relay system
With transmission line
455115, 455126, 455129, 455282, 333 171, H04B 336
Patent
active
057376875
ABSTRACT:
A transceiver system for interfacing digital modems with radio frequency signals including an antenna, an antenna interface system and a modem interface system separated by a cable. The antenna is placed in a location having optimal reception and in close proximity to the antenna interface system. The cable couples the antenna interface system to the modem interface system. The modem interface system includes a two state variable attenuator and an attenuation register that are configured to either reduce the strength of the receive (Rx) signal when the modems are located near a base station, or to transmit the Rx signal without attenuation when the concentrated subscriber unit is at a more distant location. The outgoing, or transmit (Tx), signal is also attenuated in a similar manner to the incoming signal. A signal loss detection system includes a detector located in the modem interface system that receives an oscillating signal transmitted from the antenna interface system through the coaxial cable. A differentiating integrator then determines the amount of signal loss experienced by this oscillating signal during transmission through the coaxial cable and attenuates the signal from the antenna interface system accordingly so the amount of loss experienced remains constant. DC power is transmitted from the modem interface system to the antenna interface system through the coaxial cable. A maximum power limiting system detects when the signal being generated exceeds the capacity of the transmit power amplifier and transmits an alarm signal to the modem interface system.
REFERENCES:
patent: 4592093 (1986-05-01), Ouchi et al.
patent: 5506549 (1996-04-01), Crutcher
patent: 5574992 (1996-11-01), Cugan et al.
Gregory Sherman
Kornfeld Richard K.
Martin Christopher B.
Edmonston Brian S.
Eisenzopf Reinhard J.
Miller Russell B.
Qualcomm Incorporated
Sobutka Philip J.
LandOfFree
Self-attenuating RF transceiver system using antenna and modem i does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Self-attenuating RF transceiver system using antenna and modem i, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-attenuating RF transceiver system using antenna and modem i will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-28168