Mobile radio terminal and automatic frequency control circuit
US6510187B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2001 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Jul 12, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0065
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multiplier multiplies a baseband signal with a scramble code generated by a CPICH scramble code generator and an integrator integrates the result of the multiplication. A symbol selection control unit controls the integrator such that the integrator integrates each of two successive slots in which combinations of the symbols transmitted from two antennas of a base station are the same, in accordance with the information about the synchronous positions of the slots and frames. The result of the integration is delayed by a 1-symbol delay unit and then a code of a complex component is inverted by a complex conjugate unit. A multiplier multiplies the outputs of the integrator and complex conjugate unit, which are shaped in a complex number, to obtain an amount of phase rotation between the successive symbols, i.e. a frequency error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.