Research Paper#6G, Near-Field Sensing, Antenna Arrays, Signal Processing🔬 ResearchAnalyzed: Jan 3, 2026 06:18
Near-Field Sensing Limits for 6G Antenna Arrays
Published:Dec 31, 2025 16:41
•1 min read
•ArXiv
Analysis
This paper investigates the fundamental limits of near-field sensing using extremely large antenna arrays (ELAAs) envisioned for 6G. It's important because it addresses the challenges of high-resolution sensing in the near-field region, where classical far-field models are invalid. The paper derives Cram'er-Rao bounds (CRBs) for joint estimation of target parameters and provides insights into how these bounds scale with system parameters, offering guidelines for designing near-field sensing systems.
Key Takeaways
- •Develops a unified narrow-band near-field signal model for joint parameter sensing.
- •Derives closed-form Cram'er-Rao bounds (CRBs) for target parameter estimation.
- •Provides explicit far-field and near-field approximations to understand scaling laws.
- •Offers guidelines for beamformer and algorithm design for near-field sensing.
Reference
“The paper derives closed-form Cram'er--Rao bounds (CRBs) for joint estimation of target position, velocity, and radar cross-section (RCS).”