Handoff supporting apparatus and method in CDMA communication system supporting multi-frequency assignment
US6721351B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2000 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Mar 15, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/0453
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus for producing a plurality of pilot signals corresponding to a multi-frequency assignment (FA) of a small-capacity base transceiver station supporting only the primary frequency assignment (FA1) to perform a hand-off in a CDMA communication system which supports the multi-frequency assignment (FA). The apparatus includes a first phase locked loop (PLL) synthesizer having a first PLL for synthesizing the primary frequency assignment (FA1) signal by controlling the first PLL, a second PLL synthesizer having a second PLL for synthesizing the multi-frequency assignment (FA) signals by controlling the second PLL, and an up-converter for modulating the transmission data with the primary frequency assignment signal provided from the first PLL synthesizer and producing the pilot signals corresponding to the multi-frequency assignment by modulating a signal, prior to RF modulation, with the multi-frequency assignment signals provided from the second PLL synthesizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.