ScholarWorks@숙명여자대학교

초록

This study suggests an enhanced carrier frequency offset estimation method based on subcarrier clearing. In heterogeneous network environments where the coverage of two base stations overlaps, a UE receives signals not only from the serving cell but also from other cells. Signals transmitted from non-serving cells can cause interference that degrades the accuracy of CFO estimation of the serving cell signal. This study introduces a method to compensate the effects of interference cell signals on CFO estimation by utilizing the characteristics of subcarrier allocation. Through a USRP testbed, it is experimentally shown that the proposed scheme guarantees effectiveness in both CFO estimation and PBCH decoding improvement.

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