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Nam Yul Yu
Researcher at Gwangju Institute of Science and Technology
Publications - 24
Citations - 152
Nam Yul Yu is an academic researcher from Gwangju Institute of Science and Technology. The author has contributed to research in topics: Cryptosystem & Compressed sensing. The author has an hindex of 7, co-authored 24 publications receiving 113 citations.
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Multiuser Activity and Data Detection via Sparsity-Blind Greedy Recovery for Uplink Grant-Free NOMA
TL;DR: A greedy algorithm with unknown sparsity level is proposed for CS-based multiuser activity and data detection in uplink grant-free NOMA, nearly achieving the oracle performance of fully known supports.
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An Information-Theoretic Study for Joint Sparsity Pattern Recovery With Different Sensing Matrices
TL;DR: It is shown that noisy MMV with different sensing matrices may require fewer measurements for reliable support set reconstruction, under a sublinear sparsity regime in a low noise-level scenario.
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Indistinguishability and Energy Sensitivity of Gaussian and Bernoulli Compressed Encryption
TL;DR: This paper confirms that G-OTS and B-OTS cryptosystems can be strictly and asymptotically indistinguishable, respectively, as long as each plaintext has constant energy, but the indistinguishability is highly sensitive to energy variation of plaintexts.
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Online Learning-Based Downlink Transmission Coordination in Ultra-Dense Millimeter Wave Heterogeneous Networks
TL;DR: An online learning-based transmission coordination algorithm based on the framework of multi-armed bandits to learn the unknown characteristics of inter-BS interference and exploit learned data to derive an optimal policy for maximizing the number of successful downlink transmissions is proposed.
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Indistinguishability of Compressed Encryption With Circulant Matrices for Wireless Security
TL;DR: This letter studies the security of a CS-based cryptosystem that encrypts a plaintext with a secret circulant matrix and transmits the ciphertext over a wireless channel and develops an upper bound on the entropy.