Results 31 to 40 of about 33,278 (292)
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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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
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Optimization-Based Phase-Shift Codebook Design for Large IRSs
, 2023 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
Schober, Robert +5 more
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Near-field codebook design for extremely large-scale MIMO systems based on cellular coverage
Tongxin xuebaoIn the 6G extremely large-scale MIMO systems, the transmission range between base stations and users falls within the near-field region, traditional far-field channel estimation codebooks would no longer be applicable. To address this issue, a near-field
LIANG Yan, LI Baolong, LI Fei
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Limited Feedback Precoding for Massive MIMO
International Journal of Antennas and Propagation, 2013 The large-scale array antenna system with numerous low-power antennas deployed at the base station, also known as massive multiple-input multiple-output (MIMO), can provide a plethora of advantages over the classical array antenna system.
Xin Su +6 more
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Adaptive Codebook Design and Assignment for Energy Saving in SCMA Networks
IEEE Access, 2017 Sparse code multiple access (SCMA) has been proposed as a candidate air interface (AI) technique for 5G wireless networks. However, the existing resource management schemes with predesigned SCMA codebooks cannot fully exploit user diversities in the ...
Daosen Zhai
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ITM Web of Conferences, 2018 Codebook design is a key point in beam-forming which is necessary for millimeter Wave (mmWave) communications to compensate its huge path loss. In our study, we demonstrate the benefits of the number of antenna elements for beamforming; we focus on the ...
Abdo Adam Mohamed Ahmed +3 more
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On codebook design for distributed relay beamforming network [PDF]
2012 1st IEEE International Conference on Communications in China (ICCC), 2012 We study the problem of codebook design for quantized distributed relay beamforming under individual relay power constraint in a cooperative relay network. The received SNR is used as the design metric. We study two types of codebook design: phase-only codebook where each relay uses full power, and codebook with power control where relay power and ...
Min Zheng, Min Dong 0001
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SCMA codebook design based on resource block constellation
Tongxin xuebao, 2018 Aiming at the problems of typical sparse code multiple access codebook design scheme based on multidimensional mother constellation that the complexity is high and the minimum Euclidean distance between constellation points on resource blocks is ...
Xiaotao SHAO, Mingkun GUO, Wei YANG
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NOMA Codebook Optimization by Batch Gradient Descent
IEEE Access, 2019 The non-orthogonal multiple access (NOMA) has the potential to improve the spectrum efficiency and the user connectivity compared to the orthogonal schemes. The codebook design is crucial for the the performance of the NOMA system.
Zhongwei Si, Shaoguo Wen, Bing Dong
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