Method and apparatus for estimation of phase offset between communication channels
US7149258B2 · kind B2 · utility
10Cited by
7References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2001 |
| Grant date | Dec 12, 2006 |
| Priority date | — |
| Expiry date | May 19, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/7117
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are described for estimating a phase offset between two channels in a communication system to allow the use of both in determining a complex channel estimate. The phase offset arises from the system's rotation of only one of the two signaling channels prior to its transmission on one of the two antennas in transmission diversity mode. The phase offset is calculated in a receiver, such as a mobile station. For example, in a 3GPP system, the DPCH, which is rotated, and the CPICH, which is not, may be used in channel estimation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.