| 摘要 |
<p>A scheme for identifying usable carriers for a particular modulation type and selecting, if possible, a modulation type for modulation of OFDM symbol block associated with data packets in a standard transmission mode based on data channel conditions. A physical layer unit (22) processes a channel estimation for an OFDM symbol block received by a receiving network node (12b) over a data channel during a packet transmission by a transmitting network node (12a) generates information indicative of noise events on symbols and carriers in the OFDM block, the generated information being related to modulation types available for the standard transmission mode, and determines from the generated information if at least one of the modulation types available for the standard transmission mode may be used for the next data transmission over the data channel by the transmitting network node (12a) using the standard transmission mode.</p> |
