Methods for making a cellular system, transmitting to a mobile user in a cellular system, and evaluating the performance of a cellular system
US6459895B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2000 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Sep 26, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/42
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A cellular architecture includes antenna arrays that are arranged to reduce soft handoff areas, thereby increasing system performance. The arrays are arranged such that each of the arrays are aligned along one of a plurality of parallel lines in a first direction at a regularly spaced interval, each of the arrays on a single line in the first direction having a same orientation, each of the arrays along adjacent parallel lines being staggered with respect to a nearest neighboring array in a second direction such that the second direction forms an angle of approximately 10.89 degrees with respect to a direction perpendicular to the first direction. In preferred embodiments, the orientation of arrays along adjacent parallel lines is rotated by sixty degrees with respect to each other. The architecture is particularly well-suited to CDMA systems. In preferred embodiments including smart antenna arrays, transmission to mobile users occurs along a primary multipath and two secondary multipaths. A method for determining performance of cellular systems by calculating the asymptotic capacity is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.