Radio positioning based on DoA estimation: An implementation perspective

This paper relates to radio localization based on the estimation of the signal direction of arrival (DoA). We follow a practical implementation perspective by addressing the impact of the error sources on performance. The error sources include multipath propagation and the hardware non-idealities both in the antenna array structure and in the RF and acquisition stages. We provide an overview of such impairments and we explain their effect as well as possible mitigation solutions. We also provide several results obtained via practical experimentation on a radio single-input multiple-output (SIMO) testbed. The testbed has been used to characterize/model the non-idealities and to validate localization algorithms based on DoA estimation.