An Error Rate Comparison of Power Domain Non-orthogonal Multiple Access and Sparse Code Multiple Access

<span lang="EN-GB">The progressions in telecommunication beyond the 5<sup>th</sup> generation have created a need to improve research drifts. The current 5G study has an important focus on non-orthogonal multiple access (NOMA) technology. sparse code multiple access (SCMA) is a promising technique within NOMA, enhancing the multi-user handling capability of next-generation communication. In the SCMA sphere, codebook designing and optimisation are essential research matters. This study conversed with different codebook design practises existing in the literature, analysing them for numerous parameters, including bit error rate (BER), an optimisation technique, and channel settings. From the analysis, the paper presents the efficiency of different approaches. The article also discusses the prospects and challenges of SCMA optimisation in practical implementation in various domains.</span>

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A Power Domain Sparse Code Multiple Access Scheme for Visible Light Communications

IEEE Wireless Communications Letters ◽

10.1109/lwc.2019.2941853 ◽

2020 ◽

Vol 9 (1) ◽

pp. 61-64 ◽

Cited By ~ 1

Author(s):

Bangjiang Lin ◽

Xuan Tang ◽

Zabih Ghassemlooy

Keyword(s):

Visible Light ◽

Multiple Access ◽

Sparse Code ◽

Visible Light Communications ◽

Power Domain ◽

Access Scheme

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Optimized SCMA Codebook Design Using Rotation Based Sub-Divided Constellation for Overloaded System

10.21203/rs.3.rs-598942/v1 ◽

2021 ◽

Author(s):

Madhura K ◽

M.S.S. Rukmini ◽

Rajeshree Raut

Keyword(s):

Wireless Communication ◽

Multiuser Detection ◽

Error Rate ◽

Multiple Access ◽

Symbol Error Rate ◽

Sparse Code ◽

System Model ◽

Codebook Design

Abstract 5G in wireless communication aims at deploying massive connectivity. Sparse Code Multiple Access (SCMA), proves to be an emerging candidate with multidimensional codebooks proposing, high shaping gain and advanced multiuser detection. A framework for designing a codebook for 200 % overloaded SCMA system with system model is presented in this paper. This article aims at delineating a codebook by subdividing the Mother Constellation (MC) and rotating it to achieve a better Symbol Error Rate (SER) performance over higher values of SNR. Different Codebook designs are taken into consideration for comparing with the sub-constellation based 200% overloaded SCMA. Abstract — 5G in wireless communication aims at deploying massive connectivity. Sparse Code Multiple Access (SCMA), proves to be an emerging candidate with multidimensional codebooks proposing, high shaping gain and advanced multiuser detection. A framework for designing a codebook for 200 % overloaded SCMA system with system model is presented in this paper. This article aims at delineating a codebook by subdividing the Mother Constellation (MC) and rotating it to achieve a better Symbol Error Rate (SER) performance over higher values of SNR. Different Codebook designs are taken into consideration for comparing with the sub-constellation based 200% overloaded SCMA.

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Energy efficient resource allocation for uplink hybrid power domain sparse code nonorthogonal multiple access heterogeneous networks with statistical channel estimation

Transactions on Emerging Telecommunications Technologies ◽

10.1002/ett.4185 ◽

2020 ◽

Author(s):

Simon Chege ◽

Tom Walingo

Keyword(s):

Resource Allocation ◽

Channel Estimation ◽

Heterogeneous Networks ◽

Energy Efficient ◽

Multiple Access ◽

Sparse Code ◽

Hybrid Power ◽

Power Domain ◽

Efficient Resource ◽

Energy Efficient Resource Allocation

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Resource Allocation Analysis using Power Domain Sparse Code Multiple Access

10.1109/icesc51422.2021.9532673 ◽

2021 ◽

Author(s):

Hemanth A V ◽

Prajith Chandra K ◽

Sai Bharadwaj K ◽

Prasanthi V ◽

Kirthiga S

Keyword(s):

Resource Allocation ◽

Multiple Access ◽

Sparse Code ◽

Power Domain

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Symbol Error-Rate Analytical Expressions for a Two-User PD-NOMA System with Square QAM

Symmetry ◽

10.3390/sym13112153 ◽

2021 ◽

Vol 13 (11) ◽

pp. 2153

Author(s):

Yakov V. Kryukov ◽

Dmitriy A. Pokamestov ◽

Serafim A. Novichkov

Keyword(s):

Error Rate ◽

Amplitude Modulation ◽

Multiple Access ◽

Additive White Gaussian Noise ◽

Time Spectrum ◽

Symbol Error Rate ◽

Quadrature Amplitude Modulation ◽

Power Domain ◽

Power Weights ◽

Analytical Expressions

Power domain non-orthogonal multiple access (PD-NOMA) is one of the most perspective multiplexing technologies that allows improving the capacity of actual networks. Unlike orthogonal multiple access (OMA), the PD-NOMA non-orthogonally schedules multiple users in the power domain in the same orthogonal time-spectrum resource segment. Thus, a non-orthogonal multiplexed signal is a combination of several user signals (usually, modulation and coding schemes (MCS) based on quadrature amplitude modulation) with different power weights. The symbol error rate (SER) and bit error rate (BER) performances are one of the main quality characteristics of any commutation channel. The issue is that a known analytical expression for BER and SER calculation for conventional OMA cannot be applied in terms of the PD-NOMA. In the following work, we have derived the SER and BER analytical expressions for gray-coded square quadrature amplitude modulation (QAM) user channels that are transmitted in two-user PD-NOMA channel under additive white Gaussian noise (AWGN). Through the simulation, the verification of the provided expressions is presented for four multiplexing configurations with various user power weights and QAM order combinations.

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