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Convolutional Sparse Coding based Channel Estimation for OTFS-SCMA in Uplink [article]

Anna Thomas, Kuntal Deka, P. Raviteja, Sanjeev Sharma
2021 arXiv   pre-print
This paper presents a channel estimation technique based on the convolutional sparse coding (CSC) approach for OTFS-SCMA in the uplink.  ...  The existing channel estimation techniques for OTFS in multi-user scenarios for uplink demand extremely high overhead for pilot and guard symbols, proportional to the number of users.  ...  In [9] , the authors adopted a sparse signal recovery approach using the sparse Bayesian learning (SBL) algorithm.  ... 
arXiv:2107.09893v1 fatcat:y57be3ryurhznfvmpscx57nr6u

Sparse Code Multiple Access: Potentials and Challenges

Manel Rebhi, Kais Hassan, Kosai Raoof, Pascal Charge
2021 IEEE Open Journal of the Communications Society  
This technique has been actively investigated in recent years. In this paper, we provide a comprehensive survey of the state-of-the-art of SCMA.  ...  Then, its system architecture is highlighted and its basic principles are presented, afterwards a review of exiting codebook designs and available SCMA detectors is provided, before showing how resources  ...  The iterative joint channel estimation and decoding scheme is initialized with a sparse Bayesian learning based channel estimation. F.  ... 
doi:10.1109/ojcoms.2021.3081166 fatcat:asq4vwdswzh37imgpdku7ipkiq

A Tutorial on Decoding Techniques of Sparse Code Multiple Access [article]

Saumya Chaturvedi, Zilong Liu, Vivek Ashok Bohara, Anand Srivastava, Pei Xiao
2022 arXiv   pre-print
In spite of numerous research efforts in recent years, a comprehensive one-stop tutorial of SCMA covering the background, the basic principles, and new advances, is still missing, to the best of our knowledge  ...  As an evolved variant of code division multiple access (CDMA), multiple users in SCMA are separated by assigning distinctive sparse codebooks (CBs).  ...  In [107] , a sparse-channel based EPA (SC-EPA) was proposed for uplink MIMO-SCMA system.  ... 
arXiv:2205.07456v1 fatcat:bws55xwqtjdnfb6hyvoynetv34

A Tutorial on Decoding Techniques of Sparse Code Multiple Access

Saumya Chaturvedi, Zilong Liu, Vivek Ashok Bohara, Anand Srivastava, Pei Xiao
2022 IEEE Access  
In spite of numerous research efforts in recent years, a comprehensive one-stop tutorial of SCMA covering the background, the basic principles, and new advances, is still missing, to the best of our knowledge  ...  As an evolved variant of code division multiple access (CDMA), multiple users in SCMA are separated by assigning distinctive sparse codebooks (CBs).  ...  In [103] , a sparse-channel based EPA (SC-EPA) was proposed for uplink MIMO-SCMA system.  ... 
doi:10.1109/access.2022.3178127 fatcat:7ihx3nzbjbfx5lzost6zid5di4

Iterative Receiver Design for FTN Signaling Aided Sparse Code Multiple Access

Weijie Yuan, Nan Wu, Andrew Zhang, Xiaojing Huang, Yonghui Li, Lajos Hanzo
2019 IEEE Transactions on Wireless Communications  
In this paper, we consider a combined uplink FTN-SCMA system that the data symbols corresponding to a user are further packed using FTN signaling.  ...  The sparse code multiple access (SCMA) which is a promising candidate for the next generation wireless communications can support more users using the same resource elements.  ...  JOINT CHANNEL ESTIMATION AND DECODING ALGORITHM FOR FTN-SCMA SYSTEMS A.  ... 
doi:10.1109/twc.2019.2950000 fatcat:g6e63jaqgncaxph6cljo5stp6e

A Survey of Non-Orthogonal Multiple Access for 5G

Linglong Dai, Bichai Wang, Zhiguo Ding, Zhaocheng Wang, Sheng Chen, Lajos Hanzo
2018 IEEE Communications Surveys and Tutorials  
Their design principles and key features will be discussed in detail, and a systematic comparison of these NOMA schemes will be summarized in terms of their spectral efficiency, system performance, receiver  ...  In the 5th generation (5G) of wireless communication systems, hitherto unprecedented requirements are expected to be satisfied.  ...  Therefore, more advanced channel estimation algorithms are required to achieve accurate channel estimation in NOMA systems. E.  ... 
doi:10.1109/comst.2018.2835558 fatcat:ycxmkfe3rjet7eikctqijc554m

Code Domain Non- Orthogonal Multiple Access Schemes for 5G and Beyond Communication Networks: A Review

Aasheesh Shukla, Department of Electronics and Communication, GLA, University, Mathura (281406), India, Manish Kumar, Vinay Kumar Deolia, Department of Electronics and Communication, GLA, University, Mathura (281406), India, Department of Electronics and Communication, GLA, University, Mathura (281406), India
2021 Maǧallaẗ al-abḥāṯ al-handasiyyaẗ  
Further the close attention is paid to NOMA family, including code-domain NOMA (e.g., SCMA (sparse code multiple access)), power-domain NOMA.  ...  Therefore, in this paper the comprehensive overview of the most popular and recent MA schemes is presented for 5G networks.  ...  Basically, EPA is the approximate Bayesian inference method in machine learning for estimating posterior distribution through distribution projection.  ... 
doi:10.36909/jer.10875 fatcat:rptemuf24vfi3htwyzcr3hawne

Low Complexity Iterative Receiver Design for Sparse Code Multiple Access [article]

Fan Wei, Wen Chen
2020 arXiv   pre-print
Sparse code multiple access (SCMA) is one of the most promising methods among all the non-orthogonal multiple access techniques in the future 5G communication.  ...  The LSD avoids the exhaustive search for all possible hypotheses and only considers signal within a hypersphere.  ...  SCMA SYSTEM MODEL The block diagram of synchronous uplink SCMA system is depicted in Fig. 1 , In the uplink, an SCMA encoder corresponds to one layer of the SCMA system, and each user may occupy one or  ... 
arXiv:2002.12181v1 fatcat:cx6aifwzfnca3ixma375xlepz4

2019 Index IEEE Wireless Communications Letters Vol. 8

2019 IEEE Wireless Communications Letters  
., +, LWC Channel Estimation in MIMO-OFDM Systems Based on a New Adaptive Greedy Algorithm.  ...  Anttila, L., +, LWC Dec. 2019 1653-1656 Bayes methods Off-Grid Sparse Bayesian Learning-Based Channel Estimation for MmWave Massive MIMO Uplink.  ... 
doi:10.1109/lwc.2019.2961756 fatcat:bwxehcl4ejew7a6m66prb6s4z4

DNN-Aided Block Sparse Bayesian Learning for User Activity Detection and Channel Estimation in Grant-Free Non-Orthogonal Random Access

Zhaoji Zhang, Ying Li, Chongwen Huang, Qinghua Guo, Chau Yuen, Yong Liang Guan
2019 IEEE Transactions on Vehicular Technology  
In order to address the joint user activity detection (UAD) and channel estimation (CE) problem in the grant-free NORA system, we propose a deep neural network-aided message passing-based block sparse  ...  Simulation results show that the proposed DNN-MP-BSBL algorithm could improve the UAD and CE accuracy with a smaller number of iterations, indicating its advantages for low-latency grant-free NORA systems  ...  A DNN-MP-BSBL algorithm was proposed in this paper for the joint UAD and CE problem in grant-free NORA systems.  ... 
doi:10.1109/tvt.2019.2947214 fatcat:k7mapivt2bdb5hrqvrx2lwbki4

Toward High-Performance Implementation of 5G SCMA Algorithms

Alireza Ghaffari, Mathieu Leonardon, Adrien Cassagne, Camille Leroux, Yvon Savaria
2019 IEEE Access  
The recent evolution of mobile communication systems toward a 5G network is associated with the search for new types of non-orthogonal modulations such as sparse code multiple access (SCMA).  ...  Such modulations are proposed in response to demands for increasing the number of connected users.  ...  FIGURE 1 . 1 a) SCMA encoder with 6 users (layers) and 4 physical resources, b) SCMA uplink chain with channel coding, c) Factor graph representation of a decoder, d) Message Passing Algorithm based on  ... 
doi:10.1109/access.2019.2891597 fatcat:aqaqk3asurcjle6wixosw3nurq

5GWF 2018 Subject Index

2018 2018 IEEE 5G World Forum (5GWF)  
for Broadband 24GHz & 28GHz 5G solutions Performance of Universal Filtered Multicarrier Channel Estimation with Different Pilots arrangements Physical Uplink Control Channel Design for 5G New Radio SDN  ...  Networks A Semi-Blind Channel Estimation Algorithm for One-bit Massive MIMO Systems A Software Defined Device Provisioning Framework Facilitating Scalability in Internet of Things A Vision for the Next  ... 
doi:10.1109/5gwf.2018.8516982 fatcat:inelckftp5euxcsjrhezfl5u5y

Massive Access for 5G and Beyond [article]

Xiaoming Chen, Derrick Wing Kwan Ng, Wei Yu, Erik G. Larsson, Naofal Al-Dhahir, Robert Schober
2020 arXiv   pre-print
This paper presents a comprehensive survey of aspects of massive access design for B5G wireless networks.  ...  Hence, the main characteristics of massive access include low power, massive connectivity, and broad coverage, which require new concepts, theories, and paradigms for the design of next-generation cellular  ...  In TDD systems, the devices send pilot sequences to the BTS in the uplink and the BTS obtains the downlink CSI by estimating the uplink channels exploiting channel reciprocity [110] .  ... 
arXiv:2002.03491v2 fatcat:e632upafkvhwlm4m2mwhbeleam

Sequence Design and User Activity Detection for Uplink Grant-Free NOMA in mMTC Networks

Nai-Hsuan Huang, Tzi-Dar Chiueh
2021 IEEE Open Journal of the Communications Society  
In this work, we propose an effective solution for uplink grant-free NOMA with a new user sequence scheme and a novel UAD algorithm suitable for practical channel scenarios.  ...  However, the performance of these works degrades significantly in doubly selective fading channels.  ...  Very likely, the adopted NOMA scheme for the mMTC networks with sporadic traffic is sparse-coded multiple access (SCMA).  ... 
doi:10.1109/ojcoms.2021.3056994 fatcat:yzkkdvyezjf3png77fbdujfvoy

2020 Index IEEE Transactions on Vehicular Technology Vol. 69

2020 IEEE Transactions on Vehicular Technology  
+ Check author entry for coauthors ami-mFading Channels With Integer and Non-Integerm; TVT March 2020 2785-2801 Hoang, T.M., Tran, X.N., Nguyen, B.C., and Dung, L.T., On the Performance of MIMO Full-Duplex  ...  Relaying System With SWIPT Under Outdated CSI; TVT Dec. 2020 15580-15593 Hodtani, G.A., see Gholami, R., TVT Sept. 2020 9938-9950 Hoki, K., see Kawakami, T., TVT Dec. 2020 16168-16172 Hong, C.,  ...  ., +, TVT June 2020 6242-6253 A Generalized VAMP-Based Channel Estimator for Uplink Quantized Massive MIMO Systems.  ... 
doi:10.1109/tvt.2021.3055470 fatcat:536l4pgnufhixneoa3a3dibdma
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