Hierarchical beam training
Web9 de jul. de 2024 · Two low-overhead hierarchical beam training schemes for near-field XL-MIMO system are proposed and an enhanced hierarchical training codebook via manifold optimization and alternative minimization is designed. Expand. Highly Influenced. PDF. View 5 excerpts, cites methods and background; Weband training data. Different from the existing hierarchical codebook training algorithms, we first use the beam training results from the previous layers to estimate the channel AOA or AOD at each layer and then we adaptively design a codeword in the current layer to align with the estimated AOA or AOD. Comparing with the existing beam training
Hierarchical beam training
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Web3 de jan. de 2024 · As the line-of-sight propagation component is dominant in Terahertz (THz) channels, beam training is regarded as an efficient beamforming strategy for THz … Web24 de fev. de 2024 · This inevitably incurs prohibitively high beam training overhead since it requires a two-dimensional (2D) beam search over both the angular and distance …
Web21 de set. de 2024 · Existing beam training schemes rely on the far-field codebook, which is designed based on the far-field channel model. However, due to the large aperture of XL-RIS, the user is more likely to be in the near-field region of XL-RIS. The far-field codebook mismatches the near-field channel model. Web27 de set. de 2024 · To tackle this problem, we propose a deep learning-based beam training scheme where the near-field channel model and the near-field codebook are considered. To be specific, we first utilize the received signals corresponding to the far-field wide beams to estimate the optimal near-field beam.
WebMarginMatch: Using Training Dynamics of Unlabeled Data for Semi-Supervised Learning Tiberiu Sosea · Cornelia Caragea CHMATCH: Contrastive Hierarchical Matching and … Web14 de abr. de 2024 · Beam size B controls the number of candidate nodes to be retrieved. Larger B leads to better performance and heavier computation in the inference stage. As a result, Fig. 4 (a) shows, for MovieLens-20M, 5 or 10 is the better choice. Thus we set the beam size as 10 for MovieLens-20M.
Web7 de out. de 2024 · Then we point out three critical criteria for XL-MIMO hierarchical beam training. Secondly, a novel spatial-chirp beam-aided codebook and corresponding hierarchical update policy are proposed. Thirdly, given the imperfect coverage and overlapping of spatial-chirp beams, we further design an enhanced hierarchical …
Web12 de jan. de 2024 · This study serves that aim, particularly on multi-beam training, with the output of this work can be regarded as baseband equivalent channel estimation. First, we present a novel ternary-tree-based fully-activated hierarchical codebook based on the sub-array division technique. dash king dash coversWeb12 de jan. de 2024 · Hierarchical multi-beam training with the pr esence of the. sub-connected hybrid beamforming architecture. Xinyang Li 1 Songjie Y ang 1 Wanting Lyu 1 … dash keyboard iconWebSimultaneous Multiuser Beam Training Using Adaptive Hierarchical Codebook for mmWave Massive MIMO Abstract: In this paper, a simultaneous multiuser hierarchical beam … dash kettle tealWebLabeled Hierarchy Diagram. It is designed to show hierarchical relationships progressing from top to bottom and grouped hierarchically. It emphasizes heading or level 1 text. The … dash king dash coverWeb1 de abr. de 2024 · The most prominent feature of hierarchical search algorithms is the feedback operations on selected beams that effectively reduce unnecessary beam sweeps and narrow the beam search ranges [12, 13]. Hierarchical feedback search algorithms can greatly reduce the training cost for individual users but are not suitable for multi-user … dash keto chaffleWebTo reduce the training overhead, a parallel beam alignment algorithm is proposed for the MU mmWave system with a hybrid structure. The proposed algorithm jointly exploits parallel beam alignment among different user-subsets and hierarchical beam training for each user-subset. Consequently, the training overhead is significantly reduced to 2log bite iphone 12Web12 de mar. de 2024 · In this paper, multiuser beam training based on hierarchical codebook for millimeter wave massive multi-input multi-output is investigated, where the base station (BS) simultaneously performs beam training with multiple user equipments (UEs). For the UEs, an alternative minimization method with a closed-form expression … bite iphone 13