Results 21 to 30 of about 7,220 (258)
SCMA Uplink Decoding With Codebook Collision
2017 IEEE 86th Vehicular Technology Conference (VTC-Fall), 2017 Sparse code multiple access (SCMA) is a non-orthogonal multiplexing technique proposed to the 5G mobile communication system, which can improve the system performance in massive connectivity scenarios. However, during the random access phase of the SCMA system, the codebook used by a user is unknown to the base station.
Yang Yan-jun, Yuping Zhao, Dou Li
openalex +3 more sources
Mapping reticulospinal drive across various muscles of the upper and lower extremities. [PDF]
Exp PhysiolAbstract The reticulospinal (RS) system is a fundamental descending pathway involved in human movement control. However, the relative strength of RS projections across different muscles and its specific contributions to distinct movements are poorly understood. We systematically mapped the RS drive across a broad range of muscles in the upper and lower
Eilfort AM, Neumann LC, Filli L.
europepmc +2 more sources
SCMA CODEBOOK DESIGN BASED ON GRADIENT ASCENT ALGORITHM [PDF]
Proceedings on Engineering Sciences, 2022 Sparse Code Multiple Access (SCMA) is a non-orthogonal multiple access scheme, which improves spectrum efficiency. SCMA codebooks determine the bit error rate (BER) performance.
Islam Kanatbekuli +4 more
doaj +1 more source
Investigating the Pharmacokinetics and Efficacy of Intramammary Ceftiofur Hydrochloride in Prevention of Udder Inflammation in Non-Lactating Dairy Heifers. [PDF]
J Vet Pharmacol TherABSTRACT Mastitis is the most burdensome concern for the dairy cattle industry. Antimicrobials are often prophylactically administered to dairy cows at dry‐off to reduce the risk of intramammary infection during the dry period and subsequent lactation.
Miller RA +4 more
europepmc +2 more sources
AFDM-SCMA: A Promising Waveform for Massive Connectivity Over High Mobility Channels [PDF]
IEEE Transactions on Wireless Communications, 2023 This paper studies the affine frequency division multiplexing (AFDM)-empowered sparse code multiple access (SCMA) system, referred to as AFDM-SCMA, for supporting massive connectivity in high-mobility environments.
Qu Luo +6 more
semanticscholar +1 more source
Research on resource allocation algorithm in D2D networks based on alliance game
Dianzi Jishu Yingyong, 2022 The rapid increase in the number of users in wireless networks has brought huge challenges to the existing network architecture, and how to increase the system capacity effectively is an urgent problem to be solved.
Chen Yujie, Ma Caihong
doaj +1 more source
OTFS-SCMA: A Downlink NOMA Scheme for Massive Connectivity in High Mobility Channels [PDF]
IEEE Transactions on Wireless Communications, 2023 This paper studies a downlink system that combines orthogonal-time-frequency-space (OTFS) modulation and sparse code multiple access (SCMA) to support massive connectivity in high-mobility environments.
Haifeng Wen +3 more
semanticscholar +1 more source
Research on SCMA-VLC Receiver based on Convolutional Neural Network
Guangtongxin yanjiu, 2022 The signal distortion caused by the limited bandwidth of Light Emitting Diode (LED) and its nonlinear electro-optic conversion severely limit the transmission performance of Visible Light Communication (VLC).
Shao-qin ZOU, Qi-wei LAI, Bang-jiang LIN
doaj +1 more source
Low‐complexity detection for uplink massive MIMO SCMA systems
IET Communications, 2021 This paper presents a sparse code multiple access (SCMA) system with massive antennas at the base station. This system is referred to as M‐SCMA system. A spectrally‐efficient and massive access next‐generation wireless network is realized through massive
Sanjeev Sharma +2 more
doaj +1 more source
Sparse Code Multiple Access: Potentials and Challenges
IEEE Open Journal of the Communications Society, 2021 The massive connectivity is among other unprecedented requirements which are expected to be satisfied in order to follow the perpetual increase of connected devices in the era of Internet of Things.
Manel Rebhi +3 more
doaj +1 more source