Patent ID: 7822106
Filing Date: 2010-10-26
Classification: H04B

Abstract:
1. Apparatus for use in a rake receiver for time aligning multipath signals from a base station, comprising: a plurality of rake fingers, each rake finger having a code tracker; at least three code generators each generating codes associated with a given base station, said codes being different from one another; said time aligning apparatus, comprising a shared memory for selectively providing time aligned multipath signals to code trackers of each rake finger; a memory write pointer for writing multipath signals into the shared memory at a given location; a memory read pointer for reading out multipath signals to each rake finger from a memory location of a shared memory offset from said given location, each rake finger having a given offset associated therewith and which is provided to the memory read pointer; one of said code generators providing a base station code in common to all of the code trackers of said rake fingers due to alignment of the multipath signals; each of said code trackers receiving one of the outputs read out by said read pointer to perform code tracking; and each of said code trackers providing a fine offset to said memory read pointer for adjusting an offset between said memory write pointer and memory read pointer for providing a time aligned output.