| US 7,548,764 B2 | ||
| Method and system for generating multiple radiation patterns using transform matrix | ||
| Hang Jin, Plano, Tex. (US); Brian L. Kurtz, Addison, Tex. (US); Weidong Yang, Plano, Tex. (US); Daniel Wee, Garland, Tex. (US); Phil Davis, Richardson, Tex. (US); and John Grabner, Plano, Tex. (US) | ||
| Assigned to Cisco Technology, Inc., San Jose, Calif. (US) | ||
| Filed on Feb. 03, 2006, as Appl. No. 11/346,762. | ||
| Claims priority of provisional application 60/658839, filed on Mar. 04, 2005. | ||
| Prior Publication US 2006/0199615 A1, Sep. 07, 2006 | ||
| Int. Cl. H04M 1/00 (2006.01) | ||
| U.S. Cl. 455—562.1 [455/575.7; 455/63.4; 342/368; 342/373; 343/814; 343/816] | 20 Claims |
| 1. A system comprising:
an antenna array having one or more comprising a plurality of antennas configured to provide a first narrow beamwidth radiation
pattern based on first antennas weights and a second wide beamwidth radiation pattern based on second antenna weights;
a transform matrix configured to be coupled to the antenna array and to transform one or more inputs into one or more outputs
according to a transform function that transforms the first antenna weights and second antenna weights into respective first
and second input weights that are applied to first and second sets of signals, respectively, to be transmitted, and to output,
wherein the outputs of the transform matrix provide signals to the antennas of the antenna array with predetermined phases
and magnitudes for generating in order to generate the first narrow beamwidth and second wide beamwidth radiation patterns
simultaneously; and
a transmitter configured to provide the first set of signals to be transmitted with the first narrow beamwidth radiation pattern
and the second set of signals to be transmitted with the second wide beamwidth radiation pattern to inputs of the transform
matrix.
|