이종망 간섭에 강인한 Subcarrier-clearing 기반 LTE 주파수 오프셋 추정 기법 연구

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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