Results 41 to 50 of about 12,216,998 (317)
Optimization-Based Phase-Shift Codebook Design for Large IRSs [PDF]
IEEE Communications Letters, 2022 In this letter, we focus on large intelligent reflecting surfaces (IRSs) and propose a new codebook construction method to obtain a set of pre-designed phase-shift configurations for the IRS unit cells. Since the complexity of online optimization and the
Walid R. Ghanem +5 more
semanticscholar +1 more source
Convolutional neural network and clustering-based codebook design method for massive MIMO systems
EURASIP Journal on Advances in Signal Processing, 2022 In this paper, we propose a convolutional neural network (CNN) and clustering-based codebook design method. Specifically, we train two different CNNs, i.e., CNN1 and CNN2, to compress the channel state information (CSI) matrices into the channel vectors ...
Jing Xing, Die Hu
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Fast Codebook Generation Using Pattern Based Masking Algorithm for Image Compression
IEEE Access, 2021 Vector Quantization (VQ) is a classical block coding technique used for image compression which achieves high compression using simple encoding and decoding process.
Muhammad Bilal +2 more
doaj +1 more source
SCMA Codebook Design Based on Uniquely Decomposable Constellation Groups [PDF]
IEEE Transactions on Wireless Communications, 2021 Sparse code multiple access (SCMA), which helps improve spectrum efficiency (SE) and enhance connectivity, has been proposed as a non-orthogonal multiple access (NOMA) scheme for 5G systems.
Xuewan Zhang +5 more
semanticscholar +1 more source
AFDM Chirp-Permutation-Index Modulation with Quantum-Accelerated Codebook Design [PDF]
Asilomar Conference on Signals, Systems and ComputersWe describe a novel index modulation (1M) scheme exploiting a unique feature of the recently proposed affine frequency division multiplexing (AFDM) in doubly-dispersive (DD) channels.
Hyeon Seok Rou +4 more
semanticscholar +1 more source
Deep Clustering-Based Codebook Design for Massive MIMO Systems
IEEE Access, 2019 Deep learning (DL) can effectively handle explosive data and solve the complicated non-convex problems. Recently, it is used to reduce the overhead of channel state information (CSI) feedback and improve the performance of the limited feedback massive ...
Jing Jiang +4 more
doaj +1 more source
Codebook Design of Dense Small Cell Based on Short-term Channel Information Feedback [PDF]
Jisuanji gongcheng, 2019 The traditional codebook scheme uses Rayleigh fading channel as the model to design codebook,which will lose the gain of Line of Sight(LOS) component in dense small cell channel,and the traditional optimal codeword feedback overhead is large.To solve ...
SHI Zhenyu,LI Linsen
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Codebook Design for RIS-assisted Communications
, 2023 <p>In this paper, a 1-bit beamforming codebook for Reconfigurable Intelligent Surface (RIS) is designed for an indoor environment. Each codeword in a codebook is a phase pattern at RIS elements that reflects the signal to a desired angle. For a specific reflection angle, those codewords are computed that maximizes the signal-to-noise ratio (SNR ...
Arzad Alam Kherani +3 more
openaire +1 more source
Beam Codebook Design for 5G mmWave Terminals
IEEE Access, 2019 A beam codebook of 5G millimeter wave (mmWave) for data communication consists of multiple high-peak-gain beams to compensate the high pathloss at the mmWave bands.
Jianhua Mo +8 more
doaj +1 more source
Sparse Code Multiple Access: Potentials and Challenges
IEEE Open Journal of the Communications Society, 2021 The massive connectivity is among other unprecedented requirements which are expected to be satisfied in order to follow the perpetual increase of connected devices in the era of Internet of Things.
Manel Rebhi +3 more
doaj +1 more source