Power allocation schemes for wireless powered NOMA systems with imperfect CSI: An application in multiple antenna–based relay

Nguyen, Thanh-Luan; Do, Dinh‐Thuan

doi:10.1002/dac.3789

Cited by 50 publications

(51 citation statements)

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“…There are more than schemes related to multiple access have been introduced in the Third Generation Partnership Project Radio Access Network (3GPP RAN) meeting, such as sparse code multiple access (SCMA), 1 power‐domain NOMA, 2 interleave division multiple access (IDMA), 3 multi‐user shared access (MUSA), 4 and pattern division multiple access (PDMA), 5 to name a few. Several new techniques for multiple access have studied based on the concept of NOMA as investigations in previous studies 6‐10 . By arranging different power levels to the users operating in power‐domain NOMA, multiple users can operate in each subcarrier and the diversity on that subcarrier can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Two policies for wireless non‐orthogonal multiple access systems: System model and performance enhancement of far user

2020

Int J Communication

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SummaryDevice‐to‐device (D2D)‐enabled non‐orthogonal multiple access (NOMA) network is introduced as promising candidate to support massive connectivity and satisfy the high‐throughput demand. In this paper, two schemes are investigated for situations associated with D2D users and interference from traditional cellular users. The base station equipped multiple antennas is designed to exploit higher diversity gain and make full use of spectrum resources with NOMA technique. Especially, performance improvement can be achieved as enabling D2D link and signal reception of the far user (FU) on cell‐edge area. We study two policies related to downlink and uplink of such D2D NOMA system. The simulation results indicate that the improved ergodic capacity and outage performance can be achieved at FU with more antennas at the base station and higher allocated power factor. In addition, the D2D‐enabled NOMA can significantly improve the spectral efficiency.

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Section: Introductionmentioning

confidence: 99%

Two policies for wireless non‐orthogonal multiple access systems: System model and performance enhancement of far user

2020

Int J Communication

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“…EH technique outperforms other conventional EH techniques such as solar, wind, and thermoelectric energy, which mainly depend on the surrounding environments. Besides reliability and flexibility, the ability of the RF signals to simultaneously carry both information and energy can be considered as another major advantage of the RF-EH scheme [15][16][17][18][19][20]. The simultaneous wireless information and power transfer (SWIPT) technique was introduced along with its performance in [17].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Cognitive Relay-Assisted Ambient Backscatter with MRC over Nakagami-m Fading Channels

Nguyen

Lee

2020

Sensors

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This study presents ambient backscatter communication (AmBC) network as a concept of "modulation in the air" that has drawn growing interest by both academia and industry recently. In particular, we investigate and analyze an AmBC system relying on cognitive radio, where the primary destination is equipped with multiple antennas and maximum ratio combining (MRC). A wireless powered relay is necessary to serve both primary and secondary destinations. Benefiting from the surrounding radio frequency (RF) source, the relay can support the backscattering signal. To facilitate the performance analysis of received nodes, this study presents exact closed-form expressions of the outage probability. For comparison, the outage and throughput performance of these nodes are considered in numerical simulation. Taking advantage of the AmBC technology, the impact of the backscatter ratio on system performance is carefully studied considering various other parameters. Simulation results demonstrate the exactness of the derived outage probabilities and show that the optimal throughput performance can be achieved at specific parameters.

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“…More specifically, the emerging techniques, including NOMA and energy harvesting, have been implemented for next generation wireless networks [17]. By allowing energy harvesting, the system maintains distinct power levels when the users commence NOMA transmissions [18]. It is worth noting that harvested energy is re-used for signal processing in a 3-phase scheme of energy-harvesting NOMA [19].…”

Section: Introductionmentioning

confidence: 99%

Wireless-Powered Cooperative MIMO NOMA Networks: Design and Performance Improvement for Cell-Edge Users

Vozňák

2019

Electronics

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In this paper, we study two transmission scenarios for the base station (BS) in cellular networks to serve the far user, who is located at the cell-edge area in such a network. In particular, we show that wireless-powered non-orthogonal multiple access (NOMA) and the cell-center user in such a model can harvest energy from the BS. To overcome disadvantages of the cell-edge user due to its weak received signal, we fabricate a far NOMA user with multiple antennas to achieve performance improvement. In addition, the first scenario only considers a relay link deployed to forward signals to a far NOMA user, while both direct links and relay links are generally enabled to serve a far user in the second scenario. These situations, together with their outage performance, are analyzed and compared to provide insights in the design of a real-multiple-antenna NOMA network, in which the BS is also required to equip multiple antennas for robust quality of transmission. Higher complexity in computations is already known in consideration of outage metrics with respect to performance analysis, since the system model employs multiple antennas. To this end, we employ a transmit antenna selection (TAS) policy to formulate closed-form expressions of outage probability that satisfies the quality-of-service (QoS) requirements in the NOMA network. Our simulation results reveal that the performance of the considered system will be improved in cases of higher quantity of transmit antennas in dedicated devices. Finally, the proposed design in such a NOMA system cannot only ensure a downlink with higher quality to serve a far NOMA user, but also provide significant system performance improvement compared to a traditional NOMA networks using a single antenna.

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Power allocation schemes for wireless powered NOMA systems with imperfect CSI: An application in multiple antenna–based relay

Cited by 50 publications

References 24 publications

Two policies for wireless non‐orthogonal multiple access systems: System model and performance enhancement of far user

Two policies for wireless non‐orthogonal multiple access systems: System model and performance enhancement of far user

Performance Analysis of Cognitive Relay-Assisted Ambient Backscatter with MRC over Nakagami-m Fading Channels

Wireless-Powered Cooperative MIMO NOMA Networks: Design and Performance Improvement for Cell-Edge Users

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