Forward link transmission mode for CDMA cellular communications system using steerable and distributed antennas
US5953325A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 2, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Jan 2, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W16/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A DS-CDMA cellular system is provided that employs two forward link transmission modes in parallel. A conventional transmission mode broadcasts a pilot channel that can be used by a conventional mobile station to estimate and detect a dedicated traffic channel. The second transmission mode transmits (via a sectorized or narrow lobe antenna system) all information required by a new generation mobile station to estimate and detect a traffic channel dedicated to that mobile station. Consequently, DS-CDMA system operators can introduce the use of adaptive array antenna systems or distributed antenna systems with new generation mobile stations, without terminating the use of the conventional mobile stations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.