Joint Power and Modulation Optimization in Two-User Non-Orthogonal Multiple Access Channels: A Minimum Error Probability Approach

Ng, Benjamin K.; Lam, Chan‐Tong

doi:10.1109/tvt.2018.2867480

Cited by 31 publications

(27 citation statements)

References 21 publications

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“…In the literature, SIC has been widely considered as the main detection scheme for power-domain NOMA [4], [7]- [14]. However, SIC detectors (SICDs) suffer from long processing times because the nth user has to sequentially detect and subtract the signals of all users whose indices are less than n [15]. To reduce the processing time, joint multiuser detector (JMuD) has been proposed as an alternative for the SICD [15]- [18].…”

Section: Introductionmentioning

confidence: 99%

Exact Bit Error-Rate Analysis of Two-User NOMA Using QAM With Arbitrary Modulation Orders

et al. 2020

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This letter considers the exact bit error rate (BER) analysis of a two-user non-orthogonal multiple access (NOMA) system using square quadrature amplitude modulation (QAM). Unlike existing work, no constraints are imposed on the modulation order of the QAM symbols for any user. Closedform expressions are derived for the BER of the successive interference cancellation (SIC) receiver in Raleigh fading channels. The analytical BER results corroborated by Mote Carlo simulation show that the power control becomes challenging for high order QAM. Moreover, the BER of each user is approximately independent of the modulation scheme used by the other user for certain power settings.

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Section: Introductionmentioning

confidence: 99%

Exact Bit Error-Rate Analysis of Two-User NOMA Using QAM With Arbitrary Modulation Orders

et al. 2020

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“…In this paper, we focus on the case of K = 2 only as it is more practical for multi-carrier NOMA where each subcarrier is allocated to two users [30], [31]. This is also a common assumption in many works in the NOMA literature, see for example [10], [11], [15], [18].…”

Section: System Modelmentioning

confidence: 99%

Downlink Non-Orthogonal Multiple Access Without SIC for Block Fading Channels: An Algebraic Rotation Approach

Qiu

Huang

Yuan

2019

IEEE Trans. Wireless Commun.

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In this paper, we investigate the problem of downlink non-orthogonal multiple access (NOMA) over block fading channels. For the single antenna case, we propose a class of NOMA schemes where all the users' signals are mapped into ndimensional constellations corresponding to the same algebraic lattices from a number field, allowing every user attains full diversity gain with single-user decoding, i.e., no successive interference cancellation (SIC). The minimum product distances of the proposed scheme with arbitrary power allocation factor are analyzed and their upper bounds are derived. Within the proposed class of schemes, we also identify a special family of NOMA schemes based on lattice partitions of the underlying ideal lattices, whose minimum product distances can be easily controlled. Our analysis shows that among the proposed schemes, the lattice-partition-based schemes achieve the largest minimum product distances of the superimposed constellations, which are closely related to the symbol error rates for receivers with singleuser decoding. Simulation results are presented to verify our analysis and to show the effectiveness of the proposed schemes as compared to benchmark NOMA schemes. Extensions of our design to the multi-antenna case are also considered where similar analysis and results are presented.

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“…In the literature, successive interference cancellation (SIC) has been widely considered as the main detection scheme for power-domain NOMA [3], [6]- [11]. However, SIC detectors (SICDs) suffer from long processing times because the th user has to sequentially detect and subtract the signals of all users whose indices are less than  [12]. To reduce the processing time, joint multiuser detection (JMuD) has been proposed as an alternative for the SICD [12]- [15].…”

Section: Introductionmentioning

confidence: 99%

Exact Bit Error-Rate Analysis of Two-User NOMA Using QAM with Arbitrary Modulation Orders

Al-Dweik¹,

Assaf²,

Moursi³

et al. 2020

Preprint

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This work considers the exact bit error rate (BER) analysis of a two-user non-orthogonal multiple access (NOMA) system using quadrature amplitude modulation (QAM). Unlike existing work, no constraints on the modulation order of the QAM symbols for any user. Closed-form expressions are derived for the BER of joint multiuser detector (JMuD), which is demonstrated that it is equivalent to the successive interference cancellation (SIC) receiver. Moreover, a general expression is derived for the relation between the power allocation factors for the two users, which depends on the modulation order for each user.

show abstract

Joint Power and Modulation Optimization in Two-User Non-Orthogonal Multiple Access Channels: A Minimum Error Probability Approach

Cited by 31 publications

References 21 publications

Exact Bit Error-Rate Analysis of Two-User NOMA Using QAM With Arbitrary Modulation Orders

Exact Bit Error-Rate Analysis of Two-User NOMA Using QAM With Arbitrary Modulation Orders

Downlink Non-Orthogonal Multiple Access Without SIC for Block Fading Channels: An Algebraic Rotation Approach

Exact Bit Error-Rate Analysis of Two-User NOMA Using QAM with Arbitrary Modulation Orders

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