Telecommunications – Transmitter – Diversity
Reexamination Certificate
2007-09-18
2007-09-18
Nguyen, Tony T. (Department: 2618)
Telecommunications
Transmitter
Diversity
C455S039000, C455S277100
Reexamination Certificate
active
10335605
ABSTRACT:
A wireless system, which minimizes nulls within the wireless system, while simultaneously providing diversity. A wireless system will now have increased capacity and coverage due to an enhanced signal to interference ratio in the areas of beam overlap. The system uses time or frequency offset on the signals input to an antenna to minimize interference in the regions of beam overlap. Additionally, polarization diversity can be introduced using Butler Matrices in conjunction with array elements to enhance the interference reduction.
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Weam-Juhn Wang, I-Tai Lu, Shang-Chich Liu, “Soft Analysis of CDMA Systems Using Novel Switched-Beam Smart Antennas with Polarization Diversity”, IEEE, VTC '01, pp. 243-247.
Chen Jason Jiangnan
Frank Colin
Luz Yuda
Touvannas John
Motorola Inc.
Nguyen Tony T.
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