Results 21 to 30 of about 12,216,998 (317)
Massive MIMO Codebook Design Using Gaussian Mixture Model Based Clustering
Intelligent Automation and Soft Computing, 2021 The codebook design is the most essential core technique in constrained feedback massive multi-input multi-output (MIMO) system communications. MIMO vectors have been generally isotropic or evenly distributed in traditional codebook designs.
S Markkandan +5 more
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Codebook Design Method for Astronomical Images Compression
Full Text Book of Minar Congress9, 2023 The searching in binary codebook of a combination the Block Truncation Coding and Vector Quantization methods BTC and VQ desires a time consuming process because the full codebook search for every input vector toward discovery the best matched codevector or code word, so, in this paper, at first, a small binary codebook has been designed then by ...
Maha A. Hameed
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Constellation Evolution Mother Codebook Design in SCMA [PDF]
, 2022 Abstract Sparse code multiple access (SCMA) is an emerging technology developed to meet the requirements of 5G and 6G communications and improve the spectral efficiency of systems. The key behind SCMA technology is the design of its codebook method, particularly the design of the mother codebook method, which forms the basis of excellent user ...
Fang Liu, Yongxin Feng
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Hierarchical Codebook Design With Dynamic Metasurface Antennas for Energy-Efficient Arrays [PDF]
IEEE Transactions on Wireless Communications, 2023 Dynamic metasurface antennas (DMA) provide a solution to form compact, cost-effective, energy-efficient multiple-input-multiple output (MIMO) arrays.
Joseph Carlson +2 more
semanticscholar +1 more source
2014 IEEE 80th Vehicular Technology Conference (VTC2014-Fall), 2014 Multicarrier CDMA is a multiple access scheme in which modulated QAM symbols are spread over OFDMA tones by using a generally complex spreading sequence. Effectively, a QAM symbol is repeated over multiple tones. Low density signature (LDS) is a version of CDMA with low density spreading sequences allowing us to take advantage of a near optimal message
Taherzadeh, Mahmoud +3 more
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DPSS-Based Codebook Design for Near-Field XL-MIMO Channel Estimation [PDF]
ICC 2024 - IEEE International Conference on Communications, 2023 Future sixth-generation (6G) systems are expected to leverage extremely large-scale multiple-input multiple-output (XL-MIMO) technology, which significantly expands the range of the near-field region.
Shicong Liu +3 more
semanticscholar +1 more source
Design of SCMA Codebooks using Differential Evolution [PDF]
2020 IEEE International Conference on Communications Workshops (ICC Workshops), 2020 Accepted for presentation in IEEE ICC'20 Workshop ...
Deka, Kuntal +3 more
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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
Near-Far Field Codebook Design for IOS-Aided Multi-User Communications [PDF]
Global Communications Conference, 2023 Recently, the rapid development of metasurface facilitates the growth of extremely large-scale antenna arrays, making the ultra-massive MIMO possible.
Shupei Zhang, Yutong Zhang, Boya Di
semanticscholar +1 more source
SCMA Codebook Design Based on a 16 Star-QAM with MED Maximization [PDF]
ITM Web of Conferences, 2022 The SCMA codebook design is based on star-QAM signalling constellations with operating several segmentations to generate the different user’s codebook while considering the MED maximization as the criterion design. In addition, we constructed the mapping
Meriem Afilal +3 more
doaj +1 more source