Method for processing a frequency band by a wireless communication device and corresponding device
View Patent ↗A method and apparatus for processing a frequency band by a wireless communication device to locate communication channels comprises detecting potential communication channels of the band; selecting of a sample of these detected potential channels; performing a synchronization test on the channels of the sample; and rejecting the frequency band if all of the synchronization tests fail. The frequency band may be subdivided into a plurality of ranges and a sample of detected potential channels selected for each range. The strongest detected potential channels may be selected for the sample for each range.
1. A method of processing a frequency band likely to contain communication channels, comprising:
detecting potential communication channels in the frequency band;
subdividing the frequency band into a plurality of ranges;
selecting a sample of the detected potential communication channels by selecting a single channel in each range;
performing synchronization tests on the channels in the sample by performing synchronization tests on all the detected potential channels in the frequency band if at least one of the synchronization tests carried out on the sample succeeds; and
rejecting the frequency band if all of the synchronization tests fail.
2. The method of claim 1 wherein the channel selected in each range is the channel having the highest power.
3. A wireless communication device, comprising:
a processor configured to execute a processing function to process a frequency band, the processing function comprising
a detector function configured to detect potential communication channels (MDC) of the frequency band;
a selector function configured to subdivide the frequency band into a plurality of ranges;
the selector function further configured to select a sample of channels from the detected potential communication channels by selecting a single channel present within each range;
a test function configured to perform a synchronization test on a channel; and
a control function configured to activate the test function on the channels of the sample, further configured to activate the test function to test all the channels of the band if at least one of the synchronization tests on the channels of the sample succeeds, and further configured to reject the frequency band if the tests on all the channels of the sample fail.
4. The device according to claim 3 , further comprising
memory configured to store a power of the channels in each of the ranges; and
wherein the processing function is further configured, to determine the power of the channels in each of the ranges; and
wherein the selector function is configured to select in each range the channel having the highest power.
5. The device of claim 3 wherein the wireless communication device comprises a cellular mobile telephone.