Telecommunications – Transmitter and receiver at separate stations – Single message via plural carrier wave transmission
Patent
1993-08-31
1994-10-11
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
Single message via plural carrier wave transmission
455 677, H04B 1700
Patent
active
053555198
ABSTRACT:
The invention provides a fading simulator method and a fading simulator by which the attenuation ratio is not varied and the fading characteristic of a wide band can be realized stably even when the notch frequency sweeps. A fading simulator is interposed between a transmitter and a receiver, and a signal from the transmitter is inputted to first and second path artificial circuits of the fading simulator. In the first path artificial circuit, the attenuation amount of a first variable attenuator is controlled to control the amplitude of the signal passing therethrough, and the signal is delayed by a first delay circuit. Meanwhile, in the second path artificial circuit, a variable phase shifter is controlled to control the phase of the signal passing therethrough, and the attenuation amount at a second variable attenuator is controlled in accordance with a signal obtained by addition of an amplitude characteristic leveling amplitude correction value to an amplitude control signal, whereafter the passing signal is delayed by a second delay circuit. The signals from the first and second path artificial circuits are composed by a composer, and the thus composed signal is inputted to the receiver.
REFERENCES:
A Multipath Fading Simulator for Mobile Radio by Arredondo et al.
Eisenzopf Reinhard J.
Fujitsu Limited
Lin Mary M.
LandOfFree
Fading simulation method and fading simulator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fading simulation method and fading simulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fading simulation method and fading simulator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1666327