Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2004-05-21
2008-08-26
Trinh, Sonny (Department: 2618)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S561000, C455S422100
Reexamination Certificate
active
07418274
ABSTRACT:
A wireless LAN provided for mitigating the effects of signal fading that results from multipath propagation. The wireless LAN includes a number of portable clients that, in one embodiment, may be notebook computers. An access point, or hub, couples the clients to a wired network and/or to each other. Multipath effects are mitigated in one embodiment by continually varying the radiation pattern of a transmitting antenna system associated with the access point. In one alternative embodiment, the radiation pattern of a receiving antenna system is continually varied. Numerous approaches are provided to continually varying the radiation pattern of the respective antenna system, including, but not limited to, switching between two or more antennas in an array, adjusting the physical positioning of a single or multiple antennas, adjusting the effective length of the antenna, and adjusting the respective gain and/or phase of each of one or more of the signals coupled to antennas in an array.
REFERENCES:
patent: 4223312 (1980-09-01), Gammel
patent: 5487069 (1996-01-01), O'Sullivan et al.
patent: 5546397 (1996-08-01), Mahany
patent: 5617102 (1997-04-01), Prater
patent: 5697066 (1997-12-01), Acampora
patent: 5952980 (1999-09-01), Boling
patent: 5960344 (1999-09-01), Mahany
patent: 6107963 (2000-08-01), Ohmi et al.
patent: 6295197 (2001-09-01), Watts, Jr. et al.
patent: 6359873 (2002-03-01), Kobayashi
patent: 6369766 (2002-04-01), Strickland et al.
patent: 6456257 (2002-09-01), Zamat
patent: 6486832 (2002-11-01), Abramov et al.
patent: 6583763 (2003-06-01), Judd
patent: 6615360 (2003-09-01), Amini et al.
patent: 6642899 (2003-11-01), Strickland et al.
patent: 6654347 (2003-11-01), Wiedeman et al.
patent: 6781544 (2004-08-01), Saliga et al.
patent: 6989797 (2006-01-01), Gothard et al.
patent: 6993358 (2006-01-01), Shiotsu et al.
patent: 7013138 (2006-03-01), Mahany
patent: 7039356 (2006-05-01), Nguyen
patent: 7061436 (2006-06-01), Izumi
patent: 7170873 (2007-01-01), Cisar et al.
patent: 7215297 (2007-05-01), Gothard et al.
patent: 7289481 (2007-10-01), Wax et al.
U.S. Appl. No. 09/774,838 filed Jan. 31, 2001, entitled “Computer System Including Multi-Channel Wireless Communication Link to a Remote Station”, by Joseph Curley and Eric Swartzendruber.
Dell Products L.P.
Haynes and Boone LLP
Trinh Sonny
LandOfFree
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