| 主权项 |
1. A method of synchronizing signal transmissions from a set of stations, including a plurality of stations, wherein a subset of stations have multiple antennas and optionally the method is applied to one or more of these antennas, to a predetermined target station, comprising: Identifying an antenna on one of the stations from the set of stations as a reference node, determining at the said reference node scaling factors, for one or more antennas on each of the remaining stations in the set of stations and for plurality of sub-carriers, based on the channel for signals received from the one or more antennas on the other stations in the set and the channel for the signal from the target station, and sending the corresponding scaling factors to the other stations in the set of stations via a data link, determining at the one or more antennas at each of the stations in the set of stations, except for the reference node, for the plurality of sub-carriers, a correction factor based on the scaling factors sent by the reference node over the data link and the channel of the signal received from the target station, and the channel of the signal received from the reference node station, correcting the signals transmitted to the target station from the one or more antennas of the stations in the set of stations, except for the reference node, for the plurality of sub-carriers, by the corresponding correction factor, and, for the case when there are multiple antennas on the same station as the reference node, for one or more of the other antennas in the same station as the reference node: determining a first correction factor with respect to an antenna on a different station in the set of stations, considering it as a temporary reference node, combining this said first correction factor with the correction factor previously determined for the temporary reference node, to give a final correction factor, correcting the signals transmitted to the target station by the final correction factor. |
