US Patent 7796679 Rake receiver

A rake receiver includes impulse response measurement means and path allocation means for allocating paths to rake fingers in dependence on the output of the impulse response measurement means, wherein the path allocating means is configured to compare the magnitudes of pairs of peaks, represented in the output of the impulse response measurement means, and ignore the lesser member of a pair for the allocation of paths to rake fingers, if the magnitudes of the pair differ in a predetermined manner so as to exclude spurious paths, the pairs having peaks temporally separated by a period characteristic of the separation of main and side lobes of filters for producing the baseband pulse shape expected by the receiver are used for the allocation of the paths to the rake fingers.