2021
DOI: 10.3390/electronics10243061
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Resource Allocation in NOMA-Assisted Ambient Backscatter Communication System

Abstract: This paper considers a non-orthogonal multiple access (NOMA)-assisted ambient backscatter communication (AmBC) system. To maximize the achievable sum rate (ASR) of the AmBC system, a joint optimization problem over a backscatter device (BD) grouping strategy, reflection coefficients, and decoding order is formulated, where the BD grouping strategy contains the number of BD groups and the BD allocation strategy. The BD grouping strategy, the reflection coefficients, and the decoding order are all intertwined, a… Show more

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Cited by 5 publications
(4 citation statements)
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“…𝛽 𝑖 𝑛 = { ( 16), 𝛼 𝑖 ≥ 𝛼 𝑖𝑚𝑖𝑛 (17), 𝛼 𝑖 < 𝛼 𝑖𝑚𝑖𝑛 (18) Then, depending on the conditions ( 16) and ( 17), and considering (7), 𝛽 𝑖 𝑓 can be obtained as (19).…”
Section: Derivation Of Reflection Coefficientsmentioning
confidence: 99%
See 1 more Smart Citation
“…𝛽 𝑖 𝑛 = { ( 16), 𝛼 𝑖 ≥ 𝛼 𝑖𝑚𝑖𝑛 (17), 𝛼 𝑖 < 𝛼 𝑖𝑚𝑖𝑛 (18) Then, depending on the conditions ( 16) and ( 17), and considering (7), 𝛽 𝑖 𝑓 can be obtained as (19).…”
Section: Derivation Of Reflection Coefficientsmentioning
confidence: 99%
“…The max-min EE is maximized under the influence of large-scale fading by jointly optimizing transmission power from the BS and reflection coefficient of the backscatter device [18]. The sum-rate maximization is obtained by jointly optimizing the BD allocation strategy, reflection coefficient and decoding order of BDs at the reader end as discussed in [19]. To achieve this, the authors derive a lowcomplexity solution for both static and dynamic BD grouping strategies.…”
Section: Introductionmentioning
confidence: 99%
“…In Ref. [29], the grouping method and the adjusting strategy of each BD was solved to maximize the sum rate in a NOMA-aided BackCom system. In Ref.…”
Section: Overview and Motivationmentioning
confidence: 99%
“…The resource allocation schemes were then optimized to maximize the BD uplink throughput while considering the interference between the user downlink transmission and BD uplink transmission. In [27], the achievable sum rate of a NOMA-assisted ambient backscatter communication system was maximized by jointly optimizing the BD grouping, reflection coefficients, and decoding order.…”
Section: Related Workmentioning
confidence: 99%