Makale detayı · 2023
Terahertz-Band Channel and Beam Split Estimation via Array Perturbation Model
Dergi
Institute of Electrical and Electronics Engineers (IEEE)ISSN 2644-125X
ISSN kaydı başka bir dergiye işaret ediyor; ad YÖKSİS kaydından.
- Yıl
- 2023
- Tür
- article
Veri kaynağı ayrımı
- YÖKSİS YÖKSİS makale kaydı
- YÖKSİS dergi adı Institute of Electrical and Electronics Engineers (IEEE)
- Katalog eşleşmesi (ISSN) IEEE Open Journal of the Communications Society
- OpenAlex OpenAlex zenginleştirmesi (özet, atıf, konular)
Özet
OpenAlex · İngilizce
For the demonstration of ultra-wideband bandwidth and pencil-beamforming, the terahertz (THz)-band has been envisioned as one of the key enabling technologies for the sixth generation networks. However, the acquisition of the THz channel entails several unique challenges such as severe path loss and beam-split. Prior works usually employ ultra-massive arrays and additional hardware components comprised of time-delayers to compensate for these loses. In order to provide a cost-effective solution, this paper introduces a sparse-Bayesian-learning (SBL) technique for joint channel and beam-split estimation. Specifically, we first model the beam-split as an array perturbation inspired from array signal processing. Next, a low-complexity approach is developed by exploiting the line-of-sight-dominant feature of THz channel to reduce the computational complexity involved in the proposed SBL technique for channel estimation (SBCE). Additionally, based on federated-learning, we implement a model-free technique to the proposed model-based SBCE solution. Further to that, we examine the near-field considerations of THz channel, and introduce the range-dependent near-field beam-split. The theoretical performance bounds, i.e., Cramér-Rao lower bounds, are derived both for near-and far-field parameters, e.g., user directions, beam-split and ranges. Numerical simulations demonstrate that SBCE outperforms the existing approaches and exhibits lower hardware cost.
Konular
Atıflar
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41 atıf
OpenAlex cited_by_count (önbellek / veritabanı)
Yerel katalogda bu makaleye atıf yapan 17 yayın (OpenAlex referans eşleşmesi; tam dünya listesi değildir).
- Near-Field Terahertz Communications: Model-Based and Model-Free Channel Estimation 2023
- BSA-OMP: Beam-Split-Aware Orthogonal Matching Pursuit for THz Channel Estimation 2023
- NBA-OMP: Near-Field Beam-Split-Aware Orthogonal Matching Pursuit for Wideband THz Channel Estimation 2023
- Spatial Path Index Modulation in mmWave/THz Band Integrated Sensing and Communications 2024
- Near-field Hybrid Beamforming for Terahertz-band Integrated Sensing and Communications 2023
- Antenna Selection With Beam Squint Compensation for Integrated Sensing and Communications 2024
- Federated Multi-Task Learning For THZ Wideband Channel And DOA Estimation 2023
- A Unified Approach for Beam-Split Mitigation in Terahertz Wideband Hybrid Beamforming 2023
- Spherical Wavefront Near-Field DoA Estimation in THz Automotive Radar 2024
- NEAT-MUSIC: Auto-Calibration of DOA Estimation for Terahertz-Band Massive MIMO Systems 2023