On the Achievable Rate Region of NOMA Under Outage Probability Constraints

Tang, Zihan; Wang, Jun; Wang, Jintao; Song, Jian

doi:10.1109/lcomm.2018.2870584

“…4.b. To detect its own symbol s 2 , the second user should follow the SIC process described in (13). It should be noted that the error probability of the second user is not affected by the detection result of the second bit of the first user b 12 .…”

Section: Noma Bit Error Rate (Ber) Analysis: Three Users (N = 3)mentioning

confidence: 99%

“…. By combining the results in (77), (78), (79) and (80), the total BER for the third user can be computed as 4,11,13,14,15,16,17,18] , Similar to the N = 2 NOMA system, the average BER of N = 3 NOMA system can be evaluated by averaging over the PDFs of all γ n,c values, which are given in Appendix I. Therefore, by substituting N = 3 and n = [1,2,3] in the ordered PDF in (93), the exact average BER of the first and second users can be simplified tō 4, 11, 13, 14, 15, 16, 17, 18} ,…”

Section: Bmentioning

confidence: 99%

“…The performance of NOMA systems has attracted extensive literature, which is mainly focus outage probability and capacity. For example, the outage achievable rate region is studied in [13], where the results imply that NOMA outperforms OMA under similar conditions. In [14], the authors investigate a two-users NOMA system in terms of their power allocation, through the maximization of the ergodic sum capacity with the constraint of minimum sum rate requirement, fixed total transmit power, and partial channel state information (CSI) availability.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Exact BER Performance Analysis for Downlink NOMA Systems Over Nakagami-$m$ Fading Channels

Assaf

¹

,

Al-Dweik

²

,

Moursi

³

et al. 2019

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In this paper, the performance of a promising technology for the next generation wireless communications, nonorthogonal multiple access (NOMA), is investigated. In particular, the bit error rate (BER) performance of downlink NOMA systems over Nakagami-m flat fading channels, is presented. Under various conditions and scenarios, the exact BER of downlink NOMA systems considering successive interference cancellation (SIC) is derived. The transmitted signals are randomly generated from quadrature phase shift keying (QPSK) and two NOMA systems are considered; two users' and three users' systems. The obtained BER expressions are then used to evaluate the optimal power allocation for two different objectives, achieving fairness and minimizing average BER. The two objectives can be used in a variety of applications such as satellite applications with constrained transmitted power. Numerical results and Monte Carlo simulations perfectly match with the derived BER analytical results and provide valuable insight into the advantages of optimal power allocation which show the full potential of downlink NOMA systems.

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“…Based on (10) and (15), the user outage probability expression of the NOMA system with statistical CSI can be obtained as…”

Section: Ergodic Date Ratementioning

confidence: 99%

A Joint Optimization Scheme of Resource Allocation in Downlink NOMA with Statistical Channel State Information

Xu

¹

,

Yao

²

,

Cai

³

et al. 2020

Preprint

0

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In a real communication scenario, it is very difficult to obtain the real-time Channel State Information(CSI) accurately, so the communication systems with statistical CSI have been researched. In order to maximize the throughput of the downlink Non-Orthogonal Multiple Access (NOMA) system with statistical CSI, the formula of system throughput is derived at first. Then, according to the combinatorial characteristics of the original optimization problem, it is divided into two subproblems, that is user grouping and power allocation. At last, a joint optimization scheme is proposed. In which, Genetic algorithm is introduced to solve the subproblem of power allocation, and Hungarian algorithm is introduced to solve the subproblem of user grouping. By comparing the ergodic date rate of NOMA users with statistical CSI and perfect CSI, the effectiveness of the statistical CSI sorting is verified. Compared with the Orthogonal Multiple Access (OMA) scheme, the NOMA scheme with the fixed user grouping scheme and the random user grouping scheme, the proposed scheme can effectively improve the system throughput.

show abstract

“…The second term in ( 4) is caused by the user's intra-group interference, which can be partially eliminated by the SIC receiver. According to the optimal SIC decoding order under the statistical CSI proposed in [10], the decoding order of the SIC within the group…”

Section: System Modelmentioning

confidence: 99%

A Joint Optimization Scheme of Resource Allocation in Downlink NOMA with Statistical Channel State Information

Yao

¹

,

Cai

²

,

Xu

³

et al. 2020

2020 IEEE 20th International Conference on Communication Technology (ICCT)

2

0

View full text Add to dashboard Cite

In a real communication scenario, it is very difficult to obtain the real-time Channel State Information(CSI) accurately, so the communication systems with statistical CSI have been researched. In order to maximize the throughput of the downlink Non-Orthogonal Multiple Access (NOMA) system with statistical CSI, the formula of system throughput is derived at first. Then, according to the combinatorial characteristics of the original optimization problem, it is divided into two subproblems, that is user grouping and power allocation. At last, a joint optimization scheme is proposed. In which, Genetic algorithm is introduced to solve the subproblem of power allocation, and Hungarian algorithm is introduced to solve the subproblem of user grouping. By comparing the ergodic date rate of NOMA users with statistical CSI and perfect CSI, the effectiveness of the statistical CSI sorting is verified. Compared with the Orthogonal Multiple Access (OMA) scheme, the NOMA scheme with the fixed user grouping scheme and the random user grouping scheme, the proposed scheme can effectively improve the system throughput.

show abstract

On the Achievable Rate Region of NOMA Under Outage Probability Constraints

Cited by 24 publications

References 13 publications

Exact BER Performance Analysis for Downlink NOMA Systems Over Nakagami-$m$ Fading Channels

Exact BER Performance Analysis for Downlink NOMA Systems Over Nakagami-$m$ Fading Channels

A Joint Optimization Scheme of Resource Allocation in Downlink NOMA with Statistical Channel State Information

A Joint Optimization Scheme of Resource Allocation in Downlink NOMA with Statistical Channel State Information

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