Exact BER Performance Analysis for Downlink NOMA Systems Over Nakagami-$m$  Fading Channels

Assaf, Tasneem; Al-Dweik, Arafat; Moursi, Mohamed Shawky El; Zeineldin, H. H.

doi:10.1109/access.2019.2942113

Cited by 104 publications

(112 citation statements)

References 35 publications

(62 reference statements)

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“…Power domain (PD) nonorthogonal multiple access (NOMA) has been considered extensively in the literature due to its promising spectral efficiency. The main concept of MOMA is that users who are far from the base-station require more power as compared to near users [4], [5]. Therefore, it would be possible to pair certain users based on their channel conditions, and assign them the same frequency and time resources, but different powers.…”

Section: B Noma Overviewmentioning

confidence: 99%

“…PD-NOMA has received enormous attention by the research community due to its potential to improve the spectral efficiency of various wireless networks. The work reported in the literature covers a broad range of topics such as bit error rate (BER) [4], [5], outage and capacity analysis. NOMA is also considered for cooperative communications, cognitive radio, multiple-input multiple-output (MIMO), visible light communications (VLC), free space optics (FSO) and intelligent reflecting surfaces (IRS).…”

Section: Related Workmentioning

confidence: 99%

“…When multiple packets will be transmitted, the PER should be computed while considering the multiuser interference [4], [5]. 4) At the receiver, packet A 1 will be demodulated while considering that the interference from other packets is unknown additive noise.…”

Section: A Proposed Arq-nommentioning

confidence: 99%

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ARQ: The Gateway from NOMA to NOM

Al-Dweik¹,

Iraqi²

2020

Preprint

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<div>This work presents a new framework that utilizes</div><div>power-domain (PD) nonorthogonal multiple access (NOMA) as a multiplexing scheme to improve the throughput of point-to-point (P2P), or single user, communications. The proposed framework synergizes PD-NOMA and automatic repeat request (ARQ) to enable multiplexing and transmitting multiple packets that belong to the same user simultaneously. To overcome channel estimation and feedback limitations, and to reduce the system complexity, a simple adaptation scheme is proposed select the</div><div>appropriate number packets to be transmitted within a given</div><div>transmission slot. Moreover, the number of transmitted packets</div><div>is limited to a maximum of two to allow the receiver to blindly</div><div>identify the number of transmitted packets in a particular</div><div>transmission slot. The obtained results show that the proposed</div><div>NOM scheme can eventually double the system throughput at</div><div>high signal-to-noise ratios (SNRs), and hence, reduce the delay</div><div>by 50%. The system complexity and overhead are generally</div><div>comparable to conventional ARQ systems.</div>

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Section: B Noma Overviewmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

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ARQ: The Gateway from NOMA to NOM

Al-Dweik¹,

Iraqi²

2020

Preprint

Self Cite

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“…Form [16] to [18], the bit error rate performance (BER) of the NOMA system has been studied in fading channels, i.e., Rayleigh or Nakagami-m fading channels. The BER performance of two users' and three users' system are presented in Nakagami-m fading channels in [16]. By power allocation, it achieves fairness and minimizes average BER.…”

Section: Introductionmentioning

confidence: 99%

“…By power allocation, it achieves fairness and minimizes average BER. Unlike the scheme in [16], in [17], the near user (NU), which has better channel condition, acts as a decode forward (DF) relay for the far user (FU). The NU sends the regenerated symbols of the FU to the FU.…”

Section: Introductionmentioning

confidence: 99%

The Performance Analysis of Downlink NOMA in LEO Satellite Communication System

2020

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Non-orthogonal multiple access (NOMA) has the potential to provide higher throughput than conventional orthogonal multiple access (OMA), which has been considered as a key technology for 5G. NOMA in satellite communication system can provide anytime, anywhere access with improved spectral efficiency and system capacity because of its ubiquitous coverage. However, the characteristics of the satellite channels are different from that of the terrestrial network, i.e., huge time delay and Doppler shift. In this paper, different from the existing works, which mainly focus on the performance of NOMA in static terrestrial base stations and Geostationary orbit (GEO) scenarios, we investigate the performance analysis of downlink NOMA in dynamic low earth orbit (LEO) satellite communication system with Doppler shift considered. We combine NOMA and orthogonal frequency division multiplexing (OFDM) for better spectral efficiency. Our channel model includes both small scale model and large scale model. For simplify, we only consider two users in one spot beam. Besides, we express the performance analysis of downlink NOMA in LEO satellite communication system, like ergodic capacity, outage probability (OP) and mutual information. However, in traditional NOMA scheme, the proceeding error decision of the high power user will cause the deterioration of the subsequent detection performance. Therefore, a symmetrical coding (SC) scheme for different modulation mode is proposed for low power users to get better performance. Finally, simulation results validate the performance of the NOMA scheme is better than that of the OMA scheme. The proposed SC scheme can achieve a prominent increase performance contrasted to the traditional NOMA scheme. INDEX TERMS LEO satellite communication system, NOMA, ergodic capacity, outage probability, mutual information, symmetrical coding scheme. AIJUN LIU (Member, IEEE) received the B.S. degree in microwave communications and the M.S. and Ph.D. degrees in communications engineering and information systems from the College of Communications Engineering, Army Engineer

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Fast generalized threshold‐based signal detection for multiuser downlink NOMA systems with arbitrary power allocation

Pillay

2021

Int J Communication

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Summary Non‐orthogonal multiple access (NOMA) is a technique to improve spectral efficiency. Based on the constellation relationship (CR) between the superposition‐coded signal and individual user's signals, in the literature, a simple detection scheme threshold‐based signal detection has been proposed for the two‐user downlink NOMA (DL‐NOMA) system with specific power allocations, not arbitrary power allocation. Furthermore, the average symbol error probability (ASEP) with squared M‐ary quadrature amplitude modulation for two‐user DL‐NOMA systems has also been derived based on this CR. Based on the threshold‐based signal detection for the two‐user DL‐NOMA systems with specific power allocation, in this paper, a generalized threshold‐based signal detection is proposed for all users in the multiuser DL‐NOMA systems with arbitrary power allocation, and then a fast generalized threshold‐based signal detection is further proposed. The generalized ASEP for each individual user in the multiuser DL‐NOMA system is further derived in Rayleigh fading channels. Both theoretical ASEP and simulated symbol error rate results validate the fast generalized threshold‐based signal detection scheme and the generalized ASEP for multiuser DL‐NOMA systems with arbitrary power allocations.

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Exact BER Performance Analysis for Downlink NOMA Systems Over Nakagami-$m$ Fading Channels

Cited by 104 publications

References 35 publications

ARQ: The Gateway from NOMA to NOM

ARQ: The Gateway from NOMA to NOM

The Performance Analysis of Downlink NOMA in LEO Satellite Communication System

Fast generalized threshold‐based signal detection for multiuser downlink NOMA systems with arbitrary power allocation

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