Shuffled Multiuser Detection Schemes for Uplink Sparse Code Multiple Access Systems

Du, Yang; Dong, Binhong; Chen, Zhi; Fang, Jun; Yang, Lin

doi:10.1109/lcomm.2016.2551742

Cited by 80 publications

(34 citation statements)

References 10 publications

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“…Some popular code domain NOMA solutions include sparse code multiple access (SCMA), low-density spreading CDMA (LDS-CDMA), LDS aided OFDM (LDS-OFDM), MUST, and successive interference cancellation aided MA (SAMA). The readers are referred to see [44][45][46][47][48][49][50][51][52][53][54][55] and references therein to have more deep insights into the code domain NOMA.…”

Section: Basic Concepts Of Nomamentioning

confidence: 99%

A Survey on Application of Non-Orthogonal Multiple Access to Different Wireless Networks

et al. 2019

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The fifth generation (5G) wireless systems are anticipated to meet unprecedented capacity and latency requirements. In order to resolve these challenges in 5G, non-orthogonal multiple access (NOMA) is considered as a promising technique due to its ability to enhance spectrum efficiency and user access. As opposed to conventional orthogonal multiple access (OMA) which relies on orthogonal resource sharing, NOMA has a potential of supporting a higher number of users by multiplexing different users in the same resource in a non-orthogonal manner. With advanced receiver techniques, such as successive interference cancellation (SIC), the intra-user interference can be minimized at the NOMA receiver. To date, there are comprehensive surveys on NOMA, which describe the integration of NOMA with different communication technologies and discuss different NOMA classifications. However, the existing literature is scarce in reviewing state-of-the-art applications of NOMA from the perspective of its application to cellular networks (CNs), device-to-device (D2D) communications, and wireless sensor networks (WSNs). Therefore, the purpose of this survey is to fill this gap in knowledge. Specifically, NOMA with its underlying concepts are elaborated in detail. In addition, detailed system model of different NOMA-based wireless networks is presented. Furthermore, irrespective of the underlying spatial topology of the considered NOMA-based wireless network, general analytical expressions are presented to characterize the network performance. Finally, some challenges related to NOMA design are highlighted and potential research directions are pointed out to address these issues.

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Section: Basic Concepts Of Nomamentioning

confidence: 99%

A Survey on Application of Non-Orthogonal Multiple Access to Different Wireless Networks

et al. 2019

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“…In reference [34], a threshold based MPA algorithm is proposed, which uses a threshold to control the algorithm, so as to reduce the complexity of the detection algorithm. An MPA algorithm based on a serial strategy is proposed in [35]. In reference [36], an improved serial scheduling based MPA (ISS-MPA) detection scheme is proposed.…”

Section: Introductionmentioning

confidence: 99%

A Multi-Node Detection Algorithm Based on Serial and Threshold in Intelligent Sensor Networks

Zhang

Zhao

et al. 2020

Sensors

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With the continuous progress of science and technology, intelligent wireless sensor network (IWSN) communication has become indispensable in its role in production and life because of its convenient network settings and flexible use. However, with the widespread availability of intelligent wireless sensor networks, the use of many wireless sensor nodes constitutes a multi-node wireless communication system, which turns the accuracy and low complexity of multi-node detection in sensor networks into a problem. Although the traditional algorithm has excellent performance, it cannot give consideration to both accuracy and complexity. Therefore, a maximum logarithm message passing algorithm based on serial and threshold (S-T-Max-log-MPA) for multi-mode detection in IWSN is proposed in this paper. In this algorithm, the threshold is used to determine the necessary conditions of sensor node stability first, and then the sensor node information updating is integrated into the resource node information updating, so that the system can maintain good accuracy, performance, and change the situation of poor system accuracy at low threshold. Compared with the traditional algorithm, the proposed algorithm significantly changes the algorithm complexity reduction rate of the system multi-node detection. Simulation results show that the algorithm has a good balance between accuracy and complexity reduction rate.

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“…Em [7], o log-MPA utiliza a operação max para evitar o cálculo de somas de um grande número de funções exponenciais. Para acelerar a convergência e reduzir o número de operações do MPA, modificações das equações de atualização são propostas em [8][9][10][11][12][13], reduzindo a complexidade das iterações t > 1 (após a primeira). Porém, em todos esses trabalhos, a primeira iteração possui ainda complexidade exponencial M d f .…”

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“…Devidoà complexidade exponencial, as soluções de MPA em [2][3][4][5][7][8][9][10][11][12][13] não são práticas para altos graus de sobrecarga ou altas taxas de modulação.…”

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Receptor SCMA de Baixa Complexidade Baseado em um MPA com Seleção Dinâmica de Arestas e Aproximação Gaussiana

Silva¹,

Uchôa-Filho²,

Ruyet³

2019

Anais De XXXVII Simpósio Brasileiro De Telecomunicações E Processamento De Sinais

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Resumo-Múltiplo acesso por códigos esparsos (SCMA)é uma proposta recente para futuras gerações de sistemas de comunicação, suportando sistemas sobrecarregados e colisões de usuários nos recursos compartilhados. Para lidar com a nãoortogonalidade gerada pela sobrecarga, SCMA explora a característica de esparsidade através do uso do algoritmo messagepassing (MPA) na detecção conjunta dos símbolos multidimensionais. Neste trabalho, apresentamos uma melhoria de um algoritmo MPA baseado em seleção de arestas e aproximação Gaussiana de interferência. Nossa proposta inclui uma seleção baseada em um limiar sobre o ganho de canal mais forte em cada recurso. Com esse limiar, o número de vizinhos considerados no cálculo das mensagens do MPA se torna uma variável aleatória. Nós derivamos a probabilidade de seleção de um certo número de arestas, em cada recurso, demonstrando que nosso método tem baixa probabilidade de complexidade alta no cálculo das mensagens do MPA. Por fim, mostramos que a proposta com limiar resulta em um melhor compromisso entre ordem de complexidade e desempenho em termos de taxa de erro. Palavras-Chave-SCMA, algoritmo message-passing, aproximação Gaussiana, seleção por limiar. Abstract-Sparse Code Multiple Access (SCMA) has been proposed for the newest generation of communication systems, considering overloaded non-orthogonal multiple access. To deal with the overload, SCMA exploits the sparsity feature with the aid of receivers based on the messsage-passing algorithm (MPA). In this paper, we review a low-complexity MPA receiver based on edge-selection and gaussian approximation. We improve this receiver by proposing a threshold-based criteria for the edge selection. With the threshold, the number of interfering neighbors considered in the calculation of each message of the MPA becomes a random variable. We derive the probability of a function node selecting a given number of edges, showing that our strategy results in a low probability of high complexity during the message calculation of the MPA in each resource. We also show that the proposed threshold results in a better trade-off between complexity and error-rate performance.

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Shuffled Multiuser Detection Schemes for Uplink Sparse Code Multiple Access Systems

Cited by 80 publications

References 10 publications

A Survey on Application of Non-Orthogonal Multiple Access to Different Wireless Networks

A Survey on Application of Non-Orthogonal Multiple Access to Different Wireless Networks

A Multi-Node Detection Algorithm Based on Serial and Threshold in Intelligent Sensor Networks

Receptor SCMA de Baixa Complexidade Baseado em um MPA com Seleção Dinâmica de Arestas e Aproximação Gaussiana

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