Method for operating a mobile radio communications system and stations thereof
AssigneeSiemens Aktiengesellschaft
InventorsAndreas Lobinger, Bernhard Raaf, Alexander Seeger, Ralf Wiedmann
Life of this patent
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Abstract
The aim of the invention is to estimate a dedicated channel of the downlink transmission from a base station (BS) to a subscriber station (MS) in a mobile radio communications system with antenna diversity. To this end, the subscriber station (MS) calculates a first estimation of the dedicated channel from an estimation of a global channel (CPICH) while using a weighting vector (W, W′) used by the base station (BS) for the beam forming of the dedicated channel.
Claims22
Method for operating a mobile radio communications system with at least one subscriber station and a base station with antenna diversity which transmits to the subscriber station over a dedicated channel,
- characterized in that
- the base station (BS) transmits to the subscriber station (MS) information (6, 15, 23) specifying a weighting vector (W′, W) used for beam forming of the dedicated channel.
Method according to one of the preceding claims,
- characterized in that
- it is employed for estimating the dedicated channel of the downlink transmission from the base station (BS) to the subscriber station (MS), with the subscriber station (MS) calculating a first estimation of the dedicated channel from an estimation of a global channel (CPICH) by means of the specified weighting vector (W, W′) (7, 16).
Method according to claim 18,
- characterized in that
- the subscriber station supplies short-term feedback information to the base station which specifies a selection or linear combination of vectors of the set.
Subscriber station for a mobile radio communications system in which a base station transmits a global channel and a dedicated channel intended for an individual subscriber station,
- characterized in that
- the subscriber station is able to receive information specifying a weighting vector and to calculate a first estimation of the dedicated channel from an estimation of the global channel on the assumption that the weighting vector specified by the information will be used by the base station for beam forming of the dedicated channel.
Subscriber station for a mobile radio communications system,
- characterized in that
- the subscriber station is able to receive information specifying weighting vectors and supply feedback information to the base station which specifies a selection or linear combination from among specified weighting vectors.
Base station for a mobile radio communications system which has been set up for transmitting a global channel and a dedicated channel intended for an individual subscriber station weighted with a weighting vector,
- characterized in that
- said station has further been set up for transmitting information specifying the weighting vector.
Dependencies are inferred from the claim text.