| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an apparatus and method for efficiently and reliably estimating an initial frequency offset by utilizing a step#1 cell search in an asynchronous mobile communication system. <P>SOLUTION: The present invention relates to an apparatus for estimating an initial frequency offset for initial cell search in a mobile communication system wherein a predetermined base station exchanges data with one or more user equipments (UEs) belonging to its own cell area and said UE performs the initial cell search in order to identify the base station with which the UE can exchange data, and the apparatus comprises a memory for setting and storing a plurality of pulse duration modulation (PDM) hypotheses within a loop band that an automatic frequency controller can trace, a step#1 cell searcher for performing a step#1 cell search through a primary synchronization channel for each of the PDM hypotheses and outputting a result of the cell search to the memory, and an initial frequency offset estimator for determining an initial frequency offset estimation value from the cell search results for the plurality of PDM hypotheses. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
