Apparatus and method for estimating initial frequency offset in an asynchronous mobile communication system
First Claim
1. A method for setting an initial frequency by a user equipment (UE) in a mobile communication system in which the UE performs an initial cell search in order to identify a Node B with which the UE can exchange data, the method comprising the steps of:
- performing a step#1 cell search on predetermined frequency hypothesis hypotheses through a primary synchronization channel;
storing the cell search result;
determining an initial frequency offset estimation value from the cell search results for the predetermined frequency hypothesis; and
estimating a frequency offset using the determined initial frequency offset estimation value.
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Abstract
An apparatus and method for estimating an initial frequency offset in a mobile communication system in which a user equipment (UE) performs initial cell search in order to identify a Node B with which the UE can exchange data is provided. The apparatus comprises a memory for storing a plurality of pulse duration modulation (PDM) hypotheses and storing the PDM hypotheses therein; a step#1 cell searcher for performing a step#1 cell search on each of the PDM hypotheses through a primary synchronization channel and outputting the cell search result to the memory; and an initial frequency offset estimator for determining an initial frequency offset estimation value from the cell search results for the PDM hypotheses.
25 Citations
15 Claims
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1. A method for setting an initial frequency by a user equipment (UE) in a mobile communication system in which the UE performs an initial cell search in order to identify a Node B with which the UE can exchange data, the method comprising the steps of:
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performing a step#1 cell search on predetermined frequency hypothesis hypotheses through a primary synchronization channel;
storing the cell search result;
determining an initial frequency offset estimation value from the cell search results for the predetermined frequency hypothesis; and
estimating a frequency offset using the determined initial frequency offset estimation value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for setting an initial frequency in a mobile communication system in which a user equipment (UE) performs an initial cell search in order to identify a Node B with which the UE can exchange data, the apparatus comprising:
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a memory for storing a plurality of predetermined frequency hypothesis;
a step#1 cell searcher for performing a step#1 cell search on each of the predetermined frequency hypotheses through a primary synchronization channel and outputting the cell search result to the memory; and
an initial frequency offset estimator for determining an initial frequency offset estimation value from the cell search results for the PDM hypotheses. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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Specification