Cooperative Non-Orthogonal Multiple Access in 5G Systems

Ding, Zhiguo; Peng, Mugen; Poor, H. Vincent

doi:10.48550/arxiv.1410.5846

Cited by 3 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This observation confirms the analytical results developed in (11) which show that the probability P(R m + R n − Rm − Rn < R) is no longer a function of SNR, when ρ → 0. It is interesting to observe that the choice of a smaller m is preferable to reduce P(R m + R n − Rm − Rn < R), a phenomenon previously reported in [8]. The probability that the sum rate gap between F-NOMA and conventional MA is larger than R. M = 5 and n = M .…”

Section: A Noma With Fixed Power Allocationmentioning

confidence: 67%

“…These developed analytical results demonstrate that it is almost certain for F-NOMA to outperform conventional MA, and the channel quality of the n-th user is critical to this probability. In addition, the gap between the sum rates achieved by F-NOMA and conventional MA is also studied, and it is shown that this gap is determined by how different the two users' channel conditions are, as initially reported in [8]. For example, if n = M , it is preferable to choose m = 1, i.e., pairing the user with the best channel condition with the user with the worst channel condition.…”

Section: Introductionmentioning

confidence: 94%

“…The design of NOMA for uplink transmissions has been proposed in [4], and the performance of NOMA with randomly deployed mobile stations has been characterized in [5]. The combination of cooperative diversity with NOMA has been considered in [8].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

User Pairing in Non-Orthogonal Multiple Access Downlink Transmissions

Ding¹,

Fan²,

Poor³

2014

2015 IEEE Global Communications Conference (GLOBECOM)

Self Cite

165

View full text Add to dashboard Cite

Non-orthogonal multiple access (NOMA) represents a paradigm shift from conventional orthogonal multiple access (MA) concepts, and has been recognized as one of the key enabling technologies for 5G systems. In this paper, the impact of user pairing on the performance of two NOMA systems, NOMA with fixed power allocation (F-NOMA) and cognitive radio inspired NOMA (CR-NOMA), is characterized. For F-NOMA, both analytical and numerical results are provided to demonstrate that F-NOMA can offer a larger sum rate than orthogonal MA, and the performance gain of F-NOMA over conventional MA can be further enlarged by selecting users whose channel conditions are more distinctive. For CR-NOMA, the quality of service (QoS) for users with the poorer channel condition can be guaranteed since the transmit power allocated to other users is constrained following the concept of cognitive radio networks. Because of this constraint, CR-NOMA has different behavior compared to F-NOMA. For example, for the user with the best channel condition, CR-NOMA prefers to pair it with the user with the second best channel condition, whereas the user with the worst channel condition is preferred by F-NOMA. Z. Ding and H. V. Poor are with the

show abstract

Section: A Noma With Fixed Power Allocationmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 94%

See 1 more Smart Citation

User Pairing in Non-Orthogonal Multiple Access Downlink Transmissions

Ding¹,

Fan²,

Poor³

2014

2015 IEEE Global Communications Conference (GLOBECOM)

Self Cite

165

View full text Add to dashboard Cite

show abstract

“…Furthermore, Benjebbour et al in [9] present the benefits of NOMA and discuss its performance considering adaptive modulation and coding, and frequencydomain scheduling. Moreover, Ding and co-authors in [10]- [11] discuss the superior performance of NOMA in terms of ergodic sum rates and the importance of power allocation, and a cooperative NOMA scheme where users with higher channel gains have prior information about other users' messages, respectively. Finally, Ding, Fan and Poor in [12] study user pairing on two NOMA schemes and how it affects the sum rate.…”

Section: Introductionmentioning

confidence: 99%

A hybrid TIM-NOMA scheme for the SISO Broadcast Channel

Kalokidou

Johnson

Piechocki

2015

2015 IEEE International Conference on Communication Workshop (ICCW)

View full text Add to dashboard Cite

Abstract-Future mobile communication networks will require enhanced network efficiency and reduced system overhead due to their user density and high data rate demanding applications of the mobile devices. Research on Blind Interference Alignment (BIA) and Topological Interference Management (TIM) has shown that optimal Degrees of Freedom (DoF) can be achieved, in the absence of Channel State Information (CSI) at the transmitters, reducing the network's overhead. Moreover, the recently emerged Non-Orthogonal Multiple Access (NOMA) scheme suggests a different multiple access approach, compared to the current orthogonal methods employed in 4G networks, resulting in high capacity gains. Our contribution is a hybrid TIM-NOMA scheme in Single-Input-Single-Output (SISO) Kuser cells, in which users are divided into T groups, and 1/T DoF is achieved for each user. By superimposing users in the power domain, we introduce a two-stage decoding process, managing "inter-group" interference based on the TIM principles, and "intra-group" interference based on Successful Interference Cancellation (SIC), as proposed by NOMA. We show that for high SNR values the hybrid scheme can improve the sum rate by at least 100% when compared to Time Division Multiple Access (TDMA).

show abstract