Telecommunications – Transmitter and receiver at separate stations
Patent
1994-12-07
1996-11-19
Urban, Edward F.
Telecommunications
Transmitter and receiver at separate stations
455 523, 455 65, 4552761, 4552791, 375200, H04B 704
Patent
active
055772650
ABSTRACT:
A system for mitigating the effect of fading in a digital communication system. Deep signal nulls occur when signals from multiple paths are precisely aligned in amplitude and phase canceling the signal at the receiving antenna and creating a fade. In an indoor system, moving either transmitter or receiver a short distance can shift a fade away from the frequency of interest. This invention provides an actual or perceived movement of an antenna such that the effects of fading can be averaged over a time interval. The signal processing capability of modern digital transceivers can correct errors due to the time varying fades using the present invention. Thus, a dual-antenna element using the system of this invention can provide diversity receive and transmit paths to maintain capacity. The present invention may also provide improved capacity to due enhanced stability in power control.
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Le Thanh
Miller Russell B.
Qualcomm Incorporated
Urban Edward F.
White Katherine W.
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