Patent ID: 8103273
Filing Date: 2012-01-24
Classification: H04J

Abstract:
1. A cell search device for a terminal of a cellular system using an orthogonal frequency division multiplexing access scheme, comprising: a PN code and phase delay estimating unit for calculating first correlation values of a received preamble symbol from a base station to the terminal with combination of a PN code and a Walsh code, for performing differential demodulation for the first correlation values to generate differential demodulation values, and for estimating a phase delay from the differential-demodulated values to generate an estimated phase delay value; and a Walsh code estimating unit for correcting phase delay of the received preamble symbol by using a phase derived from the estimated phase delay value, for calculating second correlation values of a corrected received preamble symbol with combination of a PN code and a Walsh code, and for estimating a Walsh code for the corresponding cell by using the second correlation values.