Patent ID: 7848392
Filing Date: 2010-12-07
Classification: H04B

Abstract:
1. A rake receiver, adapted for de-spreading a received signal from a multi-path channel, comprising: a channel estimation module, for estimating a plurality of channel gains and a plurality of corresponding path delay times in the multi-path channel; L signal branches, for delaying the received signal for a plurality of signal delay times respectively to obtain a plurality of delayed received signals, de-spreading the delayed received signals respectively to output a plurality of signal components, wherein the signal delay times are respectively proportional to the path delay times, and L is a positive integer; I noise branches, for delaying the received signal for a plurality of preset times respectively to obtain a plurality of delayed noise signals, de-spreading the delayed noise signals to output a plurality of noise components respectively, wherein I is a positive integer; and a combiner, for combining the signal components to generate a main signal, combining the noise components to generate an interference-plus-noise estimation value, and outputting a de-spreading signal according to a difference between the main signal and the interference-plus-noise estimation value; wherein the combiner adjusts weights of the signal components in the main signal according to the channel gains, and adjusts weights of the noise components in the interference-plus-noise estimation value according to I noise weights.