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Multichannel Repeater for Coherent Radar Networks Enabling High-Resolution Radar Imaging
- Source :
- IEEE Transactions on Microwave Theory and Techniques; 2024, Vol. 72 Issue: 5 p3247-3259, 13p
- Publication Year :
- 2024
-
Abstract
- Coherent radar networks allow for spanning very large apertures that include all sensors with their subapertures in the network, resulting in very good angular resolution. However, as a radar network typically has a sparse array, its performance depends on the flexibility of the antenna and network node placement. Thus, in this work, a new type of radar network is presented, allowing for a highly flexible network and array design and providing an excellent performance in direction-of-arrival (DoA) estimation. This is reached by using multichannel repeaters (MCRs) in combination with a single multiple-input multiple-output (MIMO) radar. The multichannel repeaters (MCRs) receives the radar’s signal via a line-of-sight path, and then re- transmits it via multiple transmit channels, each with a dedicated mixer used for multiplexing. To show the feasibility and the performance of this concept, a 77- <inline-formula> <tex-math notation="LaTeX">$\mathrm { \text {G} \text {Hz} }$ </tex-math></inline-formula> radar network consisting of a digital <inline-formula> <tex-math notation="LaTeX">$4\,\, \times 4$ </tex-math></inline-formula> multiple-input multiple-output (MIMO) radar and two four-channel MCRs is presented. It is designed following network array design recommendations mathematically derived in this work and combined with an adapted signal processing and network-based direction-of-arrival (DoA) estimation. The high performance of the system is demonstrated not only via systematic measurements in an anechoic chamber, but also in various automotive scenarios including multiple road users.
Details
- Language :
- English
- ISSN :
- 00189480 and 15579670
- Volume :
- 72
- Issue :
- 5
- Database :
- Supplemental Index
- Journal :
- IEEE Transactions on Microwave Theory and Techniques
- Publication Type :
- Periodical
- Accession number :
- ejs66332244
- Full Text :
- https://doi.org/10.1109/TMTT.2023.3326284