RIS-AIDED JOINT LOCALIZATION AND SYNCHRONIZATION WITH A SINGLE-ANTENNA MMWAVE RECEIVER

被引:40
作者
Fascista, Alessio [1 ]
Coluccia, Angelo [1 ]
Wymeersch, Henk [2 ]
Seco-Granados, Gonzalo [3 ]
机构
[1] Univ Salento, Dept Innovat Engn, Lecce, Italy
[2] Chalmers Univ Technol, Dept Elect Engn, Gothenburg, Sweden
[3] Univ Autonoma Barcelona, Dept Telecommun & Syst Engn, Barcelona, Spain
来源
2021 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP 2021) | 2021年
关键词
localization; synchronization; reconfigurable intelligent surface; mmWave; 5G;
D O I
10.1109/ICASSP39728.2021.9413515
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
MmWave multiple-input single-output (MISO) systems using a single-antenna receiver are regarded as a promising solution for the near future, before the full-fledged 5G MIMO will be widespread. However, for MISO systems synchronization cannot be performed jointly with user localization unless two-way transmissions are used. In this paper we show that thanks to the use of a reconfigurable intelligent surface (RIS), joint localization and synchronization is possible with only downlink MISO transmissions. The direct maximum likelihood (ML) estimator for the position and clock offset is derived. To obtain a good initialization for the ML optimization, a decoupled, relaxed estimator of position and delays is also devised, which does not require knowledge of the clock offset. Results show that the proposed approach attains the Cramer-Rao lower bound even for moderate values of the system parameters.
引用
收藏
页码:4455 / 4459
页数:5
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