期刊
IEEE SIGNAL PROCESSING LETTERS
卷 29, 期 -, 页码 1242-1246出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LSP.2022.3175417
关键词
Radar detection; Signal to noise ratio; Passive radar; Optimization; Receivers; Radio transmitters; Object detection; Active RIS; radar; target detection; reconfigurable intelligent surface (RIS); spatial; angular diversity
资金
- Italian Ministry of Education, University, and Research (MIUR)
- H2020 Marie Sklodowska-Curie Actions (MSCA) Individual Fellowships (IF) RASECOL [898354]
- Marie Curie Actions (MSCA) [898354] Funding Source: Marie Curie Actions (MSCA)
This letter introduces the active reconfigurable intelligent surface (RIS) technology and its application in radar detection. By using an active RIS to observe the target illuminated by the radar transmitter for the second time, the detection performance is improved. The design parameters such as radar transmit power, number of RIS elements, and amplification factor are selected to maximize the detection probability.
Active reconfigurable intelligent surfaces (RISs) are a novel and promising technology that allows controlling the radio propagation environment while compensating for the product path loss along the RIS-assisted path. In this letter, we consider the classical radar detection problem and propose to use an active RIS to get a second independent look at a prospective target illuminated by the radar transmitter. At the design stage, we select the power emitted by the radar, the number of RIS elements, and their amplification factor in order to maximize the detection probability for a fixed probability of false alarm and a common (among radar and RIS) power budget. An illustrative example is provided to assess the achievable detection performance, also in comparison with that of a radar operating alone or with the help of a passive RIS.
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