ScholarWorks@숙명여자대학교

초록

This study suggests CFO·STO·SCO estimation and compensation method for the spatial-diversity-achieving STLC system. As the knowledge of channel state information is available only at the transmitter, the STLC encoding is performed by exploiting the reciprocity between the uplink and downlink channels. Though the channel reciprocity is theoretically valid for the TDD system, the channel asymmetry occurs practically due to the effect of CFO·STO·SCO. Therefore, we propose a two-step estimation method that efficiently compensates the effect of CFO·STO. Furthermore, a compensation method was proposed to reduce SCO and residual phase offset. Through a software-defined modem-based single-input single-output system testbed, it is experimentally shown that the channel reciprocity is obtained form the proposed methods.

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