Results 61 to 70 of about 475 (165)
Two stage beamforming and combining scheme for FDD massive MIMO systems with multi‐antenna users
IET Communications, Volume 18, Issue 18, Page 1166-1178, November 2024.This paper proposes a two‐stage beamforming and combining scheme in frequency division duplex massive multiple‐input multiple‐output systems with multi‐antenna users. The problem of the pre‐beamforming matrix and pre‐combining matrix design are formulated as an 0–1 quadratic integer programming problem, and further transform it into an 0–1 mixed linear
Wu Zheng +3 more
wiley +1 more source
A novel receiver for uplink SCMA system
Dianxin kexue, 2017 Sparse code multiple access (SCMA) is a type of code domain non-orthogonal multiple access technology,which is regarded as a promising multiple access technology for 5G due to its excellent performance.The uplink SCMA system generally uses a message ...
Hongyang ZHANG +3 more
doaj +2 more sources
Machine learning assisted adaptive LDPC coded system design and analysis
IET Communications, Volume 18, Issue 1, Page 1-10, January 2024.A learning‐aided adaptive modulation and coding system for short block length scenarios are proposed. This is applicable to Internet of Things and URLLC cases. Abstract This paper proposes a novel machine learning (ML) assisted low‐latency low density parity check (LDPC) coded adaptive modulation (AM) system, where short block‐length LDPC codes are ...
Cong Xie +2 more
wiley +1 more source
The Journal of Engineering, 2019 New non-orthogonal multiple access technology is proposed with the development of 5G, which is expected to support higher spectrum efficiency and massive terminal access, it enables the communication system to achieve better bit error rate performance ...
Qing Wang +3 more
doaj +1 more source
Enhancing Signal Space Diversity for SCMA Over Rayleigh Fading Channels [PDF]
, 2023 Sparse code multiple access (SCMA) is a promising technique for the enabling of massive connectivity in future machine-type communication networks, but it suffers from a limited diversity order which is a bottleneck for significant improvement of error ...
Xiao, Pei +7 more
core +1 more source
IEEE Access, 2017 Sparse code multiple access (SCMA), as a promising non-orthogonal multiple access scheme for the 5G system, aims to achieve massive connections and grant-free transmission in the radio access scenario.
Guangjin Chen +3 more
doaj +1 more source
A Novel Multi-Task Learning Empowered Codebook Design for Downlink SCMA Networks [PDF]
, 2022 Sparse code multiple access (SCMA) is a promising code-domain non-orthogonal multiple access (NOMA) scheme for the enabling of massive machine-type communication.
XIAO, PEI +4 more
core +2 more sources
Impact of overload factor on uplink SCMA system
Dianxin kexue, 2018 Sparse code multiple access (SCMA) is regarded as a promising multiple access technology for 5G because of its excellent performance.One of the major challenges that 5G networks are facing is the massive connectivity in terms of both data volume and the ...
Hongyang ZHANG +3 more
doaj +2 more sources
IEEE Access, 2018 SCMA and polar coding are possible candidates for 5G systems. In this paper, we firstly propose the joint iterative detection and decoding (JIDD) receiver for the uplink polar coded sparse code multiple access (PC-SCMA) system.
Zhipeng Pan +4 more
doaj +1 more source
Transceiver design and performance analysis for uplink SCMA based on CP-free OFDM
Dianxin kexue, 2021 A typical sparse code multiple access (SCMA) system utilizes orthogonal frequency division multiplexing (OFDM) technology with cyclic prefix (CP) to combat multipath fading in wireless channels.Therefore, its capacity is reduced by the CP-insertion.To ...
Li ZHOU, Xiqing LIU
doaj +2 more sources