Rake receiver and receiving method thereof

Abstract

A disclosure of the present specification provides a rake receiver. The rake receiver may comprise: an oscillator; a radio frequency integrated circuit (RFIC) for processing analog signals, which are received after experiencing multipath propagation, according to a sampling clock generated by the oscillator and a carrier frequency clock; a rake processing unit for allocating fingers for each path to signals output from the RFIC, and then performing decoding, wherein the rake processing unit outputs information on a timing position through time tracking, a power metric sampled on-time, and the difference between a power metric at a half chip early-time and a power metric at a half chip late-time; and an auto frequency controller (AFC) for calculating a beta (β) value for adjusting the sampling clock of the oscillator according to the ratio of the difference between the power metric at the half chip early-time and the power metric at the half chip late-time to the power metric sampled on-time.