Multi-frequency pilot beacon for CDMA systems
US6556551B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1999 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | May 27, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W36/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multi-frequency pilot beacon adapted to a CDMA system using at least two different carrier frequencies, F1 and F2, for supplying PN sequences at these frequencies. The pilot beacon has a pseudorandom noise generator for supplying a pseudorandom noise sequence PN and a frequency conversion mechanism for converting the PN sequence to a first pilot beacon centered at the first CDMA carrier F1 and a second pilot beacon centered at the second CDMA carrier F2. The multi-frequency pilot beacon can be provided at a base station of a given cell to transmit the pilot beacons within that cell and the base station antenna can be used for transmitting the pilot beacons in this embodiment. Alternatively, multi-frequency pilot beacons can be provided wherever necessary within the CDMA system. The multi-frequency pilot beacon is useful in frequency hand-off operations and gathering information about cellular users in the CDMA system
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.