Results 81 to 90 of about 1,654 (206)
, 2014 Community childminding services offer short-term, part-time placements with a specially selected childminder. The majority of children cared for by community childminders are under three years of age.
Stephen, Christine +1 more
core
Factor Graph Hopping Based FH-SCMA for Band- Limited and Large-Scale IoT Networks [PDF]
In wireless Internet-of-Thing (IoT) networks, massive nodes/users congest in limited resource blocks (RB, i.e., time-frequency block). Sparse code division multiple access (SCMA) technology is a most potential solution for massive IoT access due to its ...
Liu, Zilong, Zeng, Qi, Yang, Kun
core +1 more source
Up-Link Asynchronous SCMA Low Complexity Signal Detection Algorithm
, 2021 In the case of grant free, due to the lack of synchronous time signaling, the problem of asynchronous reception in Sparse Code Multiple Access (SCMA) system cannot be ignored.
Xiao-qiang LU, Zhen-yu LEI
core +1 more source
Design of Enhanced Protograph Codes and Codebooks for IDD-SCMA Systems
IEEE AccessThis paper investigates the design of protograph low-density parity-check (PLDPC) codes and Gray-labeling codebooks (CBs) for the sparse code multiple access systems with iterative detection and decoding receiver (IDD-SCMA).
Jiaqin Chen +3 more
doaj +1 more source
Meteorological Applications, Volume 32, Issue 2, March/April 2025.The impact of rainfall and farmers' crop selection under rainfall aberration was assessed using the long‐term historical datasets on rainfall and crop production datasets of Karnataka, a rainfed state of India. A direct link between rainfall and area under different crops was observed, and was not true for many crops since there was a crop shift ...
Matadadoddi Nanjundegowda Thimmegowda +6 more
wiley +1 more source
An adaptive Uplink SCMA Scheme Based on Channel State Information
, 2020 International audienceThe sparse code multiple access (SCMA) is one of the promoting candidate of code-domain non-orthogonal multiple access (CD-NOMA) for the upcoming generations of wireless communications systems, and it has been actively investigated ...
Raoof, Kosai +3 more
core
Comparison Study between NOMA and SCMA
CoRR, 2017 In this paper, the performance and system complexity of the candidate multiple access (MA) techniques for the next generation of cellular systems, namely, non-orthogonal multiple access (NOMA) (in this paper, we consider power domain MA as NOMA) and sparse code multiple access (SCMA), are investigated.
Mohammad Moltafet +3 more
openaire +2 more sources
An Efficient Codebook Design for Uplink SCMA
IEEE Access, 2020 Sparse code multiple access (SCMA) is one of the most intensively investigated non-orthogonal multiple access (NOMA) techniques for the fifth generation communication (5G) system. In this paper, a new multi-stage optimization approach for codebook design is proposed for the uplink SCMA system.
Mengyao Gao +3 more
openaire +2 more sources
Energy‐Aware Protocol Design and Evaluation of the PHY Layer in Satellite IoT
International Journal of Satellite Communications and Networking, Volume 43, Issue 2, Page 61-76, March/April 2025.ABSTRACT Direct‐to‐satellite communication for the Internet of Things (IoT) has attracted significant interest from both the scientific community and major telecommunications players. The integration of satellite connectivity in smartphones and IoT devices promises a transformative impact on critical applications such as environmental monitoring, asset
Simon Heine +2 more
wiley +1 more source
Low-Complexity Expectation Propagation Detection for Uplink MIMO-SCMA Systems [PDF]
, 2020 We consider uplink sparse code multiple access (SCMA) systems associated with multiple input multiple output (MIMO), where the transmitters and the receiver are equipped with multiple antennas, for enhanced reliability (diversity gain) or improved data ...
Hemadeh, Ibrahim A. +8 more
core +1 more source