APPARATUS FOR DEMODULATING WITH LOW COMPLEXITY, AND METHOD THEREOF

摘要

A demodulating apparatus of low complexity in a wireless communication system and a method thereof are provided to maximize efficiency of hardware by forming a demodulating block by one flow coefficient matching filter. A first register part(609) stores a receiving signal inputted in a present symbol cycle. A second register part(611) stores a receiving signal inputted in a previous symbol cycle. A first PN sequence part(615) has a PN sequence value fixed in the present symbol cycle. A second PN sequence part(617) cyclic-shifts a PN sequence in the present symbol cycle. A trivial multiplying part performs cross correlation by using the PN sequence stored to the second sequence part and the receiving signal stored to the second register part in the present symbol cycle. A symbol demodulation is performed by calculating a cross correlation value of the successively shifted PN sequence and the receiving signal stored to the second register part in the present symbol cycle.