Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Naoki, Ishikawa"'
Autor:
Kein Yukiyoshi, Taku Mikuriya, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Naoki Ishikawa
Publikováno v:
IEEE Transactions on Quantum Engineering, Vol 5, Pp 1-16 (2024)
In this article, we propose new formulations of max-sum and max-min dispersion problems that enable solutions via the Grover adaptive search (GAS) quantum algorithm, offering quadratic speedup. Dispersion problems are combinatorial optimization probl
Externí odkaz:
https://doaj.org/article/9b89d38849fc49e9859023578e9edc6e
Publikováno v:
IEEE Access, Vol 12, Pp 83810-83821 (2024)
Maximum-likelihood multiuser detection incurs a large computational complexity, and its low-complexity detection scheme suffers from a performance loss, where this tradeoff is inevitable and inherent in a classical computer. In this paper, we use the
Externí odkaz:
https://doaj.org/article/ca2374eace38460bbe867bedde0595d4
Publikováno v:
IEEE Transactions on Quantum Engineering, Vol 5, Pp 1-12 (2024)
Grover adaptive search (GAS) is a quantum exhaustive search algorithm designed to solve binary optimization problems. In this article, we propose higher order binary formulations that can simultaneously reduce the numbers of qubits and gates required
Externí odkaz:
https://doaj.org/article/65632f20c39a487e8421403c4ec56e70
Reactivity of observers’ facial skin blood flow depending on others’ facial expressions and blushing
Publikováno v:
Frontiers in Psychology, Vol 14 (2023)
Facial skin blood flow (SkBF) has attracted attention as an autonomic indicator because it influences facial colour, which informs others of emotional states, and facial temperature related to social anxiety. Previous studies have examined the facial
Externí odkaz:
https://doaj.org/article/ce2ad4d2841349b69172500ce4bf8c98
Publikováno v:
IEEE Transactions on Quantum Engineering, Vol 4, Pp 1-12 (2023)
In this article, we propose a novel method of formulating an NP-hard wireless channel assignment problem as a higher-order unconstrained binary optimization (HUBO), where the Grover adaptive search (GAS) is used to provide a quadratic speedup for sol
Externí odkaz:
https://doaj.org/article/939303d9e1444ebcbfd490a88a27b743
Publikováno v:
Electronics Letters, Vol 59, Iss 8, Pp n/a-n/a (2023)
Abstract In the IEEE 802.11 specifications, a wireless fidelity (Wi‐Fi) access point (AP) broadcasts a beacon frame every 0.1024 s, and the received signal strength indicator (RSSI) is measured at a user terminal. RSSI is used as a metric for AP se
Externí odkaz:
https://doaj.org/article/e149d232f86f4f389b8d941cfaa3c9b2
Autor:
Naoki Ishikawa
Publikováno v:
IEEE Access, Vol 9, Pp 111114-111124 (2021)
This paper presents a quantum-assisted index modulation for next-generation IoT wireless networks. The NP-hard index selection problem is first formulated by a quadratic unconstrained binary optimization (QUBO) problem consisting of constraints of fe
Externí odkaz:
https://doaj.org/article/89f16ff44fd24a5499036967f0e73f70
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 2, Pp 2180-2194 (2021)
In this paper, we propose a differential multiple-input multiple-output (MIMO) scheme based on the novel concept of chaos-based time-varying unitary matrices to demonstrate—for the first time in the literature—the ability of differential encoding
Externí odkaz:
https://doaj.org/article/57bac8badd74417f924a87d71065d46c
Autor:
Chao Xu, Naoki Ishikawa, Rakshith Rajashekar, Shinya Sugiura, Robert G. Maunder, Zhaocheng Wang, Lie-Liang Yang, Lajos Hanzo
Publikováno v:
IEEE Access, Vol 7, Pp 178246-178299 (2019)
Sixty years of coherent versus non-coherent tradeoff as well as the twenty years of coherent versus non-coherent tradeoff in Multiple-Input Multiple-Output (MIMO) systems are surveyed. Furthermore, the advantages of adaptivity are discussed. More exp
Externí odkaz:
https://doaj.org/article/5d9233a0df3b4032b9d6eb2939dd1bca
Publikováno v:
IEEE Access, Vol 7, Pp 28581-28591 (2019)
In this paper, we propose, implement, and evaluate a simple yet powerful estimation method for the quality of service of a large-scale Wi-Fi network, which is achieved using our passive and low-complexity measurements. Specifically, our proposed meth
Externí odkaz:
https://doaj.org/article/1cdfffecd31c448f8bfd534e8c1e7f32