| 摘要 |
<p>A transmitter (40) for use, for example, in an OFDM communication system transmits a plurality of signals simultaneously to one or more receivers (50). At the transmitter, a suitable phase vector is selected from among a plurality of available phase vectors to apply to the plurality of signals. The selection of the suitable phase vector is initially limited to phase vectors belonging to a first set of the available phase vectors, and is expanded to further phase vectors outside said first set when no suitable phase vector is found in the first set. This can save processing burden in the transmitter.
The transmitter transmits to the receiver information identifying a limited set of phase vectors within the plurality of available phase vectors, the selected phase vector belonging to the limited set. The receiver identifies the limited set using the received information and limits the trial phase vectors which are processed to recover the data to those trial phase vectors that correspond respectively to the available phase vectors of the limited set. This can save signalling burden whilst keeping the receiver processing burden manageable.</p> |
