| 摘要 |
<p>A technique for allowing a mobile radio unit of a mobile radio communications system to find and synchronise to a signal of its radio system. The mobile unit stores a list of frequencies used by the radio system where it can expect to find radio system synchronization signals. To find a signal of the radio system, the mobile unit initially scans all the frequencies in its list to assess the signal level on each frequency, and to assess whether the signal on each frequency has particular characteristics, e.g. the phase shift characteristics, of a signal of the radio system. The probability that the signal has the correct signal characteristics is stored with the signal level and the frequencies in the list are then reordered according to the measured signal levels and the probability that the signals have the required particular signal characteristics, to provide a revised frequency order for the mobile unit to then attempt to synchronise to.</p> |
