Method and apparatus for channel estimation with transmit diversity
US6853689B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 2000 |
| Grant date | Feb 8, 2005 |
| Priority date | — |
| Expiry date | May 19, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0669
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are described for estimating channels in a radio communication system using transmit diversity. Channel coefficients ĝ11,ĝ12,ĝ21,ĝ22 associated with a transmit diversity channel may be estimated in a radio communication system having a Base Station (BS) and at least one Mobile Station (MS) includes a transmit diversity channel transmitted over at least two propagation paths from at least two antennas associated with a BS. A sequence of pilot symbols is provided for each of at least two antennas for transmission from the BS to a MS over the transmit diversity channel. A series of symbols r1, r2, r3, r4 are received at the MS from the transmit diversity channel and a matrix P of values of the sequence of pilot symbols is established according to a relation which satisfies a full rank condition for the matrix P which may be stored together with P−1 in a memory. Channels estimates are determined using the matrix and the received sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.