Multipath search method and apparatus

A method of updating a multipath search that has located one or more multipath component peaks in a received signal, the method comprising repeating the search using a delay spread window extending either back from the latest peak or forward from the earliest peak.

Apparatus for updating a multipath search that has located one or more multipath component peaks in a received signal by correlating the received signal against a known signal at various time offsets between the two signals, wherein the or each peak appears at a respective time offset and the apparatus comprises a processor arranged to perform an updating search for multipath component peaks in the signal by correlating the known signal against the received signal over a range of time offsets, wherein the range extends either in a first manner from the smallest time offset that produced a peak in the search to be updated in the direction of increasing time offset or in a second manner from the greatest time offset that produced a peak in the search to be updated in the direction of decreasing time offset.

Apparatus for updating a multipath search that has located one or more multipath component peaks in a received signal, the apparatus comprising a processor for repeating the search using a delay spread window extending either back from the latest peak or forward from the earliest peak.

A radio telecommunications device including an apparatus for updating a multipath search that has located one or more multipath component peaks in a received signal by correlating the received signal against a known signal at various time offsets between the two signals, wherein the or each peak appears at a respective time offset and the apparatus comprises a processor arranged to perform an updating search for multipath component peaks in the signal by correlating the known signal against the received signal over a range of time offsets, wherein the range extends either in a first manner from the smallest time offset that produced a peak in the search to be updated in the direction of increasing time offset or in a second manner from the greatest time offset that produced a peak in the search to be updated in the direction of decreasing time offset.

A data carrier containing code capable of being executed through a data processing resource to perform a method of updating a multipath search that has located one or more multipath component peaks in a received signal by correlating the received signal against a known signal at various time offsets between the two signals, wherein the or each peak appears at a respective time offset and the method comprises performing an updating search for multipath component peaks in the signal by correlating the known signal against the received signal over a range of time offsets, wherein the range extends either in a first manner from the smallest time offset that produced a peak in the search to be updated in the direction of increasing time offset or in a second manner from the greatest time offset that produced a peak in the search to be updated in the direction of decreasing time offset.

A radio telecommunications device including apparatus for updating a multipath search that has located one or more multipath component peaks in a received signal, the apparatus comprising a processor for repeating the search using a delay spread window extending either back from the latest peak or forward from the earliest peak.

A method of updating a multipath search that has located one or more multipath component peaks in a received signal, the method comprising repeating the search using a delay spread window extending either back from the latest peak or forward from the earliest peak.