Wireless communication method and apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsNgoc-Dung DAO, Yong Sun
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Abstract
In a wireless communications system, a method of processing data prior to transmission thereof to a plurality of stations. The method includes determining a channel matrix using a plurality of weighted channel responses, each of which is associated with one of the plurality of stations and weighted by a gain factor corresponding to the station, wherein the gain factor is inversely proportional to a noise power of the station. The data is then processed in accordance with a precoding scheme using the determined channel matrix.
Claims17
A method of processing data prior to transmission thereof to a plurality of stations in a wireless communications system, the method comprising:
- determining a channel matrix using a plurality of weighted channel responses, each of which is associated with one of the plurality of stations and weighted by a gain factor corresponding to said station, wherein said gain factor is inversely proportional to a noise power of said station;
- and
- processing the data in accordance with a precoding scheme using said channel matrix.
A method of transparently providing a station with a data recovery functionality, the data being subjected to a precoding scheme prior to transmission to the station, the method comprising:
- transmitting a scalar to the station, said scalar comprising a combination of a power normalization factor and a gain factor, wherein said gain factor is inversely proportional to a noise power of said station.
A multiple antenna apparatus for transmitting data to a plurality of stations, the apparatus comprising:
- means for determining a channel matrix using a plurality of weighted channel responses, each of which is associated with one of a plurality of stations and weighted by a gain factor corresponding to said station;
- and
- means for processing the data in accordance with a precoding scheme using said channel matrix.
A method of feeding back information to a multiple antenna apparatus from a station in a wireless communications system, the method comprising:
- measuring a channel response and a noise power;
- calculating a gain factor for said noise power, said gain factor being inversely proportional to said noise power;
- weighting said channel response with said gain factor;
- and
- transmitting the weighted channel response to said multiple antenna apparatus.
A method of recovering received data at a station, the received data having been subjected to a precoding scheme prior to transmission, the precoding scheme using a channel matrix comprising a weighted channel response associated with the station, the weighted channel response being weighted by a gain factor that is inversely proportional to a noise power of the station, the method comprising:
- applying said gain factor to the received data.
A station for receiving data from a multiple antenna apparatus, the station comprising:
- means for measuring a noise power;
- means for measuring a channel response;
- means for calculating a gain factor for said noise power, said gain factor being inversely proportional to said noise power;
- means for weighting said channel response with said gain factor;
- and
- means for applying said gain factor to the received data.
Dependencies are inferred from the claim text.