Results 221 to 230 of about 252,451 (254)
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Massive Random Access in Massive MIMO via Opportunistic Thresholding
ICC 2020 - 2020 IEEE International Conference on Communications (ICC), 2020Non-orthogonal codes have been recently applied for massive IoT random access to a massive MIMO base station. Activity detection for this extension of on-off random access channel yields a jointly sparse multiple measurement vector (MMV) problem. However, no one investigated the regime when measurements per antenna are very limited but number of ...
Mohammad NaseriTehrani +1 more
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Exploiting Rateless Coding for Massive Access
IEEE Transactions on Vehicular Technology, 2018In this correspondence paper, we design a massive nonorthogonal multiple access (NOMA) scheme with delay provisioning for cellular internet-of-things. In the context of massive access, the severe interuser interference decreases the quality of the received signal, such that it is a nontrivial task to provide a delay provisioning for heterogeneous ...
Xiaoming Chen 0001, Rundong Jia
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A perspective on massive random-access
2017 IEEE International Symposium on Information Theory (ISIT), 2017This paper discusses the contemporary problem of providing multiple-access (MAC) to a massive number of uncoordinated users. First, we define a random-access code for Ka-user Gaussian MAC to be a collection of norm-constrained vectors such that the noisy sum of any K a of them can be decoded with a given (suitably defined) probability of error.
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Contention-based nonorthogonal massive access with massive MIMO
China Communications, 2020The sporadic communication character of massive machine-type communication systems provides natural advantages to utilize the principle of compressive sensing (CS). However, due to the high computational complexity of CS algorithms, CS-based contention-free access schemes have limited scalability and high computational complexity for massive access ...
Yanna Bai +3 more
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Massive MIMO for dynamic spectrum access
2017 IEEE International Conference on Consumer Electronics (ICCE), 2017This paper proposes the application of massive MIMO, combined with millimeter (mm)-wave technology, in dynamic spectrum access (DSA) systems. In the proposed system, secondary users transmit together with the primary users, while using beamforming to control interference. Simulation results show significant performance gains compared to traditional DSA
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Compressive-Sensing-Based Grant-Free Massive Access for 6G Massive Communication [PDF]
IEEE Internet of Things JournalThe advent of the sixth-generation (6G) of wireless communications has given rise to the necessity to connect vast quantities of heterogeneous wireless devices, which requires advanced system capabilities far beyond existing network architectures. In particular, such massive communication has been recognized as a prime driver that can empower the 6G ...
Zhen Gao, Malong Ke, Yikun Mei
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Near-Optimal Coding for Massive Multiple Access
2021 IEEE International Symposium on Information Theory (ISIT), 2021We study the Gaussian multiple access channel (MAC) in the asymptotic regime where the number of users grows linearly with the codelength. We analyze coding schemes based on random linear models with approximate message passing (AMP) decoding. For fixed target error rate and number of bits per user, we obtain the exact tradeoff between energy-per-bit ...
Kuan Hsieh +2 more
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Federated Learning With Massive Random Access
IEEE Transactions on Wireless CommunicationsIn this paper, we propose an online federated learning framework with massive random access, aiming to learn a sequence of global models using local data that are sequentially collected by massive edge devices. As only a subset of devices is capable of collecting data and performing local model update at any specific moment, the communication pattern ...
Shuhao Xia +5 more
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Enabling LPWAN Massive Access: Grant-Free Random Access with Massive MIMO
IEEE Wireless Communications, 2022Hao Jiang 0030 +5 more
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Fully Non-Orthogonal Communication for Massive Access
IEEE Transactions on Communications, 2018To achieve spectral-efficient massive access in future wireless networks, this paper proposes a comprehensive fully non-orthogonal communication framework. First, we design a fully non-orthogonal communication scheme which consists of non-orthogonal channel estimation and non-orthogonal multiple access.
Xiaoming Chen 0001 +4 more
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