| 摘要 |
<p>An object of the present invention is to provide a mechanism for improving resource utilization in a wireless communications system. The object is achieved by a method in a first node (1 10) for transmitting reference symbols to a second node (120). The first node (110) and the second node ( 120) are both comprised in a wireless communications system (100). The first node (110) comprises at least three antenna ports (140, 150, 160). In the method, first and subsequent groups of reference symbols are transmitted, in two separate time periods, from each one of the antenna ports (140, 150, 160) to the second node (120). The first and subsequent groups comprise an equal number of reference symbols for each one of the antenna ports (140, 150, 160). Furthermore, each of the antenna ports (140, 150, 160), transmits its reference symbols on different frequency positions in the first and subsequent time periods.</p> |
