Millimeter-Wave NOMA With User Grouping, Power Allocation and Hybrid Beamforming

Zhu, Lipeng; Zhang, Jun; Xiao, Zhenyu; Cao, Xianbin; Wu, Dapeng; Xia, Xiang-Gen

doi:10.1109/twc.2019.2932070

Cited by 169 publications

(151 citation statements)

References 42 publications

Supporting

Mentioning

151

Contrasting

Order By: Relevance

“…Following similar steps, upon substituting (20), (17), as shown at the bottom of page 6, and (10) into (45), we can obtain (27). The proof is completed.…”

Section: Appendix Fmentioning

confidence: 84%

“…At the same time, the use of NOMA in conjunction with mmWave was investigated in [26]- [33]. Specifically, user grouping and power allocation strategies for mmWave NOMA network were analyzed in [26], [27]. The work in [28] proposed an angle-based user pairing strategy in the mmWave downlink NOMA networks, in which LOS user with the minimum relative angle difference to typical users was selected.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Analysis on Secure Millimeter Wave NOMA Communications in Cognitive Radio Networks

et al. 2020

View full text Add to dashboard Cite

In this paper, an easy analysis framework is developed to evaluate the reliability and security of the secondary receivers (SU-Rxs) in millimeter wave (mmWave) non-orthogonal multiple access (NOMA) aided cognitive radio (CR) networks, where secondary transmitters (SU-Txs) transmit confidential messages to SU-Rxs belonging to different regions under the interference temperature constraint of the primary receiver (PU-Rx). Considering that randomly located eavesdroppers and primary user may be in the signal beam emitted by the SU-Txs, information leakage and interference to the primary network will be inevitable issues. Motivated by these challenges, combining the key features of multi-cell mmWave networks and NOMA communications, the closed-form expressions of three key performance metrics of connection outage probability (COP), secrecy outage probability (SOP), and secrecy throughput (ST) are derived by using the sector eavesdropper-exclusion zone, and the reliability and secrecy performance of the secondary networks are measured by different system parameters. The obtained performance evaluation results have demonstrated that the interference temperature constraint of the PU-Rx can be used to balance the security and reliability of the secondary networks. The reliability and security of paired NOMA users can be improved by using reasonable power allocation factor and sector eavesdropper-exclusion zone. Meanwhile, the connection performance of paired NOMA users is better than orthogonal multiple access (OMA). Furthermore, various system parameters can be reasonably set in conjunction with blockage and inter-cell interference to achieve optimal network's performance. INDEX TERMS Non-orthogonal multiple access (NOMA), millimeter wave (mmWave), cognitive radio (CR), stochastic geometry.

show abstract

“…Following similar steps, upon substituting (20), (17), as shown at the bottom of page 6, and (10) into (45), we can obtain (27). The proof is completed.…”

Section: Appendix Fmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

An Analysis on Secure Millimeter Wave NOMA Communications in Cognitive Radio Networks

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Moreover, opportunistically pairing for users with distinct channel conditions greatly reduced the complexity of NOMA systems [13]. Based on the users' channel correlations, user grouping was applied in millimeter-Wave (mmWave) NOMA systems in [14] and mmWave massive multiple-input multiple-output (MIMO) NOMA systems with SWIPT in [15], where a joint design of user grouping, power allocation, analog and digital precoding approach showed the SE and EE improvements over its counterpart without user grouping. To further enhance the SE of MIMO-NOMA systems, [16] proposed user pairing and scheduling algorithms which not only pair the selected users but also schedule suitable pairs for data transmission.…”

Section: A Related Workmentioning

confidence: 99%

“…First, due to the strong coupling between continuous variables (w, V) and binary variables A, an exhaustive search can be used to find an optimal solution to (14) with a very high computational complexity. Second, even when binary variables are fixed, problem (14) is still highly non-convex in continuous variables (w, V). In practical networks, the computational complexity of using exhaustive search is exponentially growing when the number of users increases.…”

Section: Proposed Algorithm For Sem Problemmentioning

confidence: 99%

Hybrid User Pairing for Spectral and Energy Efficiencies in Multiuser MISO-NOMA Networks With SWIPT

Nguyen

Costa

et al. 2020

IEEE Trans. Commun.

View full text Add to dashboard Cite

In this paper, we propose a novel hybrid user pairing (HUP) scheme in multiuser multiple-input single-output nonorthogonal multiple access networks with simultaneous wireless information and power transfer. In this system, two information users with distinct channel conditions are optimally paired while energy users perform energy harvesting (EH) under non-linearity of the EH circuits. We consider the problem of jointly optimizing user pairing and power allocation to maximize the overall spectral efficiency (SE) and energy efficiency (EE) subject to userspecific quality-of-service and harvested power requirements. A new paradigm for the EE-EH trade-off is then proposed to achieve a good balance of network power consumption. Such design problems are formulated as the maximization of nonconcave functions subject to the class of mixed-integer non-convex constraints, which are very challenging to solve optimally. To address these challenges, we first relax binary pairing variables to be continuous and transform the design problems into equivalent non-convex ones, but with more tractable forms. We then develop low-complexity iterative algorithms to improve the objectives and converge to a local optimum by means of the inner approximation framework. Simulation results show the convergence of proposed algorithms and the SE and EE improvements of the proposed HUP scheme over state-of-the-art designs. In addition, the effects of key parameters such as the number of antennas and dynamic power at the BS, target data rates, and energy threshold, on the system performance are evaluated to show the effectiveness of the proposed schemes in balancing resource utilization.

show abstract

“…Different from conventional lower frequency cellular networks, the mmWave channel consists of a line-of-sight (LOS) path and several non-line-of-sight (NLOS) paths. Therefore, similar to [26]- [30], the mmWave channel vector can be modeled as…”

Section: Channel Modelmentioning

confidence: 99%

Performance Analysis of Agile-Beam NOMA in Millimeter Wave Networks

Jing

Zhang

et al. 2020

IEEE Access

View full text Add to dashboard Cite

We propose an agile-beam non-orthogonal multiple access (NOMA) scheme for millimeter wave (mmWave) communication networks. The agile-beam NOMA scheme flexibly switches between the single/multi-beam NOMA depending on the user pairing results. In particular, a novel user pairing strategy employing both distance and angle information is designed to facilitate the agile-beam NOMA transmission. More specifically, the base station first selects one user from the far user group randomly and then pairs it with the user that has the minimum angle difference in the near user group. This pairing strategy efficiently exploits the channel sparsity in user domain while supporting flexible mmWave transmission with agilebeam NOMA. Then an in-depth performance analysis is carried out to reveal the interplay between the key system parameters and the coverage probability of the proposed agile-beam NOMA by using the tool of stochastic geometry. Moreover, numerical results demonstrate the superiority of the proposed agile-beam NOMA over the conventional NOMA and orthogonal multiple access (OMA) in mmWave communication networks. INDEX TERMS Millimeter wave (mmWave) communication, non-orthogonal multiple access (NOMA), user pairing.

show abstract

Millimeter-Wave NOMA With User Grouping, Power Allocation and Hybrid Beamforming

Cited by 169 publications

References 42 publications

An Analysis on Secure Millimeter Wave NOMA Communications in Cognitive Radio Networks

An Analysis on Secure Millimeter Wave NOMA Communications in Cognitive Radio Networks

Hybrid User Pairing for Spectral and Energy Efficiencies in Multiuser MISO-NOMA Networks With SWIPT

Performance Analysis of Agile-Beam NOMA in Millimeter Wave Networks

Contact Info

Product

Resources

About