| 摘要 |
In certain embodiments, a communications system includes (i) a base station having multiple base station antennas and (ii) one or more users, each user having one or more user antennas, wherein at least a first user has multiple user antennas. In the downlink direction, the base station transmits one or more data streams to each user with at least two data streams transmitted to the first user. The base station applies a different pilot signal to each different data stream, such that at least two different pilot signals get applied to the at least two different data streams transmitted to the first user. Each user uses its one or more corresponding pilot signals to perform channel estimation for its one or more data streams, such that the first user uses its two or more corresponding pilot signals to perform channel estimation for its two or more data streams. |
