| 摘要 |
<p>A communication system comprising: one or more transceiver units of a first type; a data store accessible to the or each transceiver unit of the first type; two or more transceiver units of a second type, the transceiver units of a second type being capable of communicating with the transceiver units of the first type, and each transceiver unit of the second type comprising a local frequency reference unit on which the frequency of signals transmitted by it are dependent; wherein: at least one transceiver unit of the first type comprises a frequency comparison unit for comparing the frequency of a signal received from a transceiver unit of the second type with a reference frequency, and a feedback data storage unit for storing in the data store feedback data representative of the result of that comparison in respect of that transceiver unit of the second type; and the or each transceiver unit of the first type comprises a frequency adjustment unit for adjusting the transmit and/or receive frequency of the transceiver unit of the first type for communication with one of the transceiver units of the second type in accordance with feedback data stored in respect of that transceiver unit of the second type.</p> |
