Codebook design and beam training for extremely large-scale RIS: Far-field or near-field? [PDF]
China Communications, 2021 Reconfigurable intelligent surface (RIS) is more likely to develop into extremely large-scale RIS (XL-RIS) to efficiently boost the system capacity for future 6G communications. Beam training is an effective way to acquire channel state information (CSI)
Xiuhong Wei +4 more
semanticscholar +1 more source
EdVAE: Mitigating Codebook Collapse with Evidential Discrete Variational Autoencoders [PDF]
Pattern Recognition, 2023 Codebook collapse is a common problem in training deep generative models with discrete representation spaces like Vector Quantized Variational Autoencoders (VQ-VAEs).
Gulcin Baykal, M. Kandemir, Gozde Unal
semanticscholar +1 more source
SCMA Codebook Design Based on Divided Extended Mother Codebook [PDF]
IEEE Access, 2021 Sparse code multiple access (SCMA) is one of the competitive non-orthogonal multiple access (NOMA) techniques for the next generation communication systems. In this paper, we put forward a simple and efficient design method named divided extended mother codebook (DEMC) to construct SCMA codebooks based on golden angle modulation (GAM) constellation ...
Zhaoyang Hou +3 more
openaire +2 more sources
Spatial-Chirp Codebook-Based Hierarchical Beam Training for Extremely Large-Scale Massive MIMO [PDF]
IEEE Transactions on Wireless Communications, 2022 Extremely large-scale multiple-input multiple-output (XL-MIMO) promises to provide ultrahigh data rates in millimeter-wave (mmWave) and Terahertz (THz) spectrum.
Xu Shi +3 more
semanticscholar +1 more source
Multi-modal Alignment using Representation Codebook [PDF]
Computer Vision and Pattern Recognition, 2022 Aligning signals from different modalities is an important step in vision-language representation learning as it affects the performance of later stages such as cross-modality fusion.
Jiali Duan +6 more
semanticscholar +1 more source
Hierarchical Codebook Design for Near-Field mmWave MIMO Communications Systems [PDF]
IEEE Wireless Communications Letters, 2022 Communications system with analog or hybrid analog/digital architectures usually relies on a pre-defined codebook to perform beamforming. With the increase in the size of the antenna array, the characteristics of the spherical wavefront in the near-field
Jiawei Chen +3 more
semanticscholar +1 more source
A Review of Codebook Models in Patch-Based Visual Object Recognition [PDF]
, 2011 The codebook model-based approach, while ignoring any structural aspect in vision, nonetheless provides state-of-the-art performances on current datasets.
Niranjan, Mahesan +1 more
core +1 more source
Communication-Efficient Collaborative Perception via Information Filling with Codebook [PDF]
Computer Vision and Pattern RecognitionCollaborative perception empowers each agent to improve its perceptual ability through the exchange of perceptual messages with other agents. It inherently results in a fundamental tradeoff between perception ability and communication cost.
Yue Hu +5 more
semanticscholar +1 more source
Single-Codec: Single-Codebook Speech Codec towards High-Performance Speech Generation [PDF]
InterspeechThe multi-codebook speech codec enables the application of large language models (LLM) in TTS but bottlenecks efficiency and robustness due to multi-sequence prediction.
Hanzhao Li +8 more
semanticscholar +1 more source