Outage analysis for NOMA‐based energy harvesting relay network with imperfect CSI and transmit antenna selection

Mondal, Soumen; Roy, Sanjay Dhar; Kundu, Sumit

doi:10.1049/iet-com.2019.0841

Cited by 14 publications

(7 citation statements)

References 30 publications

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“…It is necessary to know the order of average channel gains or instantaneous channel state information (CSI) for fixed power allocation [114] or dynamic channel allocation [115] respectively. The users' ordering is accomplished mostly based on the instantaneous value of CSI [109], [116]. It is to note that a wrong user ordering leads to an incorrect choice of power distribution, which may lead to a situation where a few users are always in outage [117].…”

Section: A Fundamental Of Noma Techniquementioning

confidence: 99%

A Survey on Cache-Aided NOMA for 6G Networks

Bepari¹,

Mondal²,

Chandra³

et al. 2022

Preprint

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Contrary to orthogonal multiple-access (OMA), non-orthogonal multiple-access (NOMA) schemes can serve a pool of users without exploiting the scarce frequency or time domain resources. This is useful in meeting the sixth generation (6G) network requirements, such as, low latency, massive connectivity, users' fairness, and high spectral efficiency. On the other hand, content caching restricts duplicate data transmission by storing popular contents in advance at the network edge which reduces 6G data traffic. In this survey, we focus on cache-aided NOMA-based wireless networks which can reap the benefits of both cache and NOMA; switching to NOMA from OMA enables cache-aided networks to push additional files to content servers in parallel and improve the cache hit probability. Beginning with fundamentals of cache-aided NOMA technology, we summarize the performance goals of cache-aided NOMA systems, present the associated design challenges, and categorize related recent literature based on their application verticals. Concomitant standardization activities and open research challenges are highlighted as well.

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Section: A Fundamental Of Noma Techniquementioning

confidence: 99%

A Survey on Cache-Aided NOMA for 6G Networks

Bepari¹,

Mondal²,

Chandra³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

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“…where n R stands for the additive white Gaussian noise (AWGN) with variance N 0 , PS coefficient is denoted by β (0 < β < 1) assigned at relay. The harvested power during the first transmission phase is given as [20,25]…”

Section: Snr Computationmentioning

confidence: 99%

Implement of multiple access technique by wireless power transfer and relaying network

2021

Bulletin EEI

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In this paper, we investigate non-orthogonal multiple access (NOMA) network relying on wireless power transfer to prolong lifetime. The base station (BS) sends common signals to the relay with two functions (energy harvesting (EH) and signal processing) to further serve two NOMA users in downlink. Performance gap exists since different power allocation factor assigned from power splitting protocol adopted at the relay and such relay employs both amplify-and-forward (AF) and decode-and-forward schemes. To provide performance metrics, we prove formulas of the outage probability which is a function of transmit signal to noise ratio. Simulation results indicate specific parameters to adjust system performance of two user in the considered EH-NOMA system. This finding is important recommendation to design EH-NOMA which shows particular outage performance at required target rates.

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“…In PS, a portion

(PS factor) of signal power received from one source node is used for EH, while the rest 1-

is used for information decoding. The literature [ 15 , 16 ] investigates PS-based NOMA communication, while the achievable rate and OP in IoT relay NOMA system are analyzed under TS architecture [ 12 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Time Switching Based Wireless Powered Relay Transmission with Uplink NOMA

Zhou

Cao

2021

Sensors

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Non-orthogonal multiple access (NOMA) utilizes power domain multiplexing to improve spectrum efficiency compared with orthogonal multiple access (OMA). In the Internet of Things (IoT) uplink NOMA networks, if the channel between the far-end node and the base station is in deep fading, allocating larger transmitting power for this node cannot achieve higher spectrum efficiency and overall system throughput. Relay cooperative communication reduces the transmitting power at the far-end node but leads to extra energy expenditure at the relay node. Fortunately, simultaneous wireless information and power transfer (SWIPT) is advocated in energy-constrained IoT networks to save energy consumption. However, early works all focus on energy harvesting (EH) from one source node or one dedicated power supply station. In this paper, we propose a time switching based wireless powered relay transmission model with uplink NOMA where our EH technique can harvest energy from two simultaneously transmitting nodes. More importantly, by optimizing relay position more energy is harvested from the near-end node at the relay and relay signal attenuation to the destination is reduced as well. Furthermore, the closed-form expressions of outage probability and overall system throughput are derived, and numerical results prove that NOMA in our EH scheme achieves better performance compared to the traditional EH scheme and OMA by optimizing the position of the relay node, time switching factor and so on.

show abstract

Outage analysis for NOMA‐based energy harvesting relay network with imperfect CSI and transmit antenna selection

Cited by 14 publications

References 30 publications

A Survey on Cache-Aided NOMA for 6G Networks

A Survey on Cache-Aided NOMA for 6G Networks

Implement of multiple access technique by wireless power transfer and relaying network

Time Switching Based Wireless Powered Relay Transmission with Uplink NOMA

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