Performance Analysis of OSTBC-NOMA System in the Presence of Practical Impairments

Toka, Mesut; Kucur, Oğuz

doi:10.1109/tvt.2020.3001742

Cited by 15 publications

(13 citation statements)

References 36 publications

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“…It is quite obvious that the aforementioned studies do not consider channel estimation error (CEE), feedback delay (FBD), and imperfect SIC (ipSIC) which are crucial not to be ignored although they comprise of multiple antenna and relaying techniques. Nevertheless, there are some investigations on MIMO-NOMA with/without relaying techniques considering practical impairments (such as CEE, FBD, and ipSIC) [34][35][36][37][38][39] to demonstrate the effects on the system performance, but still remain limited. In particular, in Reference 34, the system considered in Reference 25 is generalized to all STBC schemes, and OP and ergodic capacity (EC) performances are investigated by taking into account CEE, FBD and imperfect SIC.…”

Section: Motivation and Contributionsmentioning

confidence: 99%

“…Therefore, power allocation coefficients are determined according to the order of channel gains between the selected second antenna of BS and mobile users as

‖ ĥ_{S U_{1}}^{m a j} ‖_{F}^{2} \leq ‖ ĥ_{S U_{2}}^{m a j} ‖_{F}^{2} \leq ‖ ĥ_{S U_{3}}^{m a j} ‖_{F}^{2}

and

a_{1} > a_{2} > a_{3}

(

\sum_{l = 1}^{3} a_{l} = 1

) since channel gains obtained by majority selection technique provide the best SNR values over all combinations which are much more effective in determining the power allocation coefficients as compared to the others obtained by randomly selection approach. Then, with the help of decoding method for STBC schemes provided in Reference 47 and by taking into account ipSIC at mobile users, instantaneous SINR that

U_{l}

can decode the signal of

U_{k}

(

k \leq l

) is expressed as 34

\begin{align} γ_{S U_{k \to l}} & = \frac{a_{k} \frac{P_{S} ρ^{2}}{2 σ^{2}} {normalΥ}_{l}}{\frac{P_{S} ρ^{2}}{2 σ^{2}} {normalΥ}_{l} (ϖ_{k} + {\overset{ϖ}{true}}_{k}} \end{align}

…”

Section: Performance Analysismentioning

confidence: 99%

“…Nevertheless, there are some investigations on MIMO‐NOMA with/without relaying techniques considering practical impairments (such as CEE, FBD, and ipSIC) 34‐39 to demonstrate the effects on the system performance, but still remain limited. In particular, in Reference 34, the system considered in Reference 25 is generalized to all STBC schemes, and OP and ergodic capacity (EC) performances are investigated by taking into account CEE, FBD and imperfect SIC. In Reference 35, the impact of CEEs on the performance of cooperative NOMA, which consists of one BS and multiple mobile users, is investigated in terms of OP and ergodic sum rate over Nakagami‐ m fading channels.…”

Section: Introductionmentioning

confidence: 99%

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Performance analyses of TAS/Alamouti‐MRC NOMA system with channel estimation error, feedback delay, and imperfect SIC

Toka

Kucur

2021

Trans Emerging Tel Tech

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In this article, the performance of a power domain downlink multiple-input multiple-output non-orthogonal multiple access system, where the base station (BS) equipped with three antennas communicates simultaneously with three mobile users equipped with multiple antennas, is analyzed over Nakagami-m fading channels in the presence of channel estimation error (CEE), feedback delay (FBD), and imperfect successive interference cancellation. In the considered system, the BS applies transmit antenna selection (TAS)/Alamouti-space-time block coding (STBC) scheme while mobile users are assumed to adopt maximum-ratio combining technique in order to take advantage of the combination of transmit and receive diversities. In particular, in order to apply Alamouti-STBC scheme at the BS, one of the transmit antennas is determined randomly while the other one is selected according to decision of the majority of mobile users. For performance metrics, closed-form outage probability (OP) and ergodic capacity (EC) expressions derived with the help of moment generating function approach. Moreover, asymptotic analyses are maintained to demonstrate the effects of CEE and FBD in terms of diversity order and array gain. We show that the proposed system provides better OP and EC performance than the system without antenna selection for different users and conditions.

show abstract

Section: Motivation and Contributionsmentioning

confidence: 99%

“…Therefore, power allocation coefficients are determined according to the order of channel gains between the selected second antenna of BS and mobile users as

‖ ĥ_{S U_{1}}^{m a j} ‖_{F}^{2} \leq ‖ ĥ_{S U_{2}}^{m a j} ‖_{F}^{2} \leq ‖ ĥ_{S U_{3}}^{m a j} ‖_{F}^{2}

and

a_{1} > a_{2} > a_{3}

(

\sum_{l = 1}^{3} a_{l} = 1

U_{l}

can decode the signal of

U_{k}

(

k \leq l

) is expressed as 34

\begin{align} γ_{S U_{k \to l}} & = \frac{a_{k} \frac{P_{S} ρ^{2}}{2 σ^{2}} {normalΥ}_{l}}{\frac{P_{S} ρ^{2}}{2 σ^{2}} {normalΥ}_{l} (ϖ_{k} + {\overset{ϖ}{true}}_{k}} \end{align}

…”

Section: Performance Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance analyses of TAS/Alamouti‐MRC NOMA system with channel estimation error, feedback delay, and imperfect SIC

Toka

Kucur

2021

Trans Emerging Tel Tech

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“…The number of studies based on performance analysis in A-STBC/NOMA network in the literature is minimal [11][12][13]. Also, in [14], the authors analyzed the network's Outage Probability for practical challenges such as CEE (Channel Estimation Error) FBD (Feedback Delay) on the downlink NOMA network using the OSTBC technique with code lengths 2 and 3.…”

Section: Introductionmentioning

confidence: 99%

UAV-Assisted NOMA-Based Network with Alamouti Space-Time Block Coding

et al. 2022

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“…In [12], conventional Alamouti-STBC scheme has been applied to downlink multiuser NOMA system, where users are equipped with single antenna, and exact OP expression is obtained for any user over Nakagami-𝑚 fading channels. In [13], the same system investigated in [12] has been generalized to cover all STBC schemes [14] by taking into account practical impairments such as CEE, feedback delay (FBD) and imperfect SIC. However, using multiple antennas at the transmitter and receiver ends increases hardware complexity and power consumption due to multiple radio-frequency (RF) chains.…”

Section: Introductionmentioning

confidence: 99%

Performance Analyses of TAS/Alamouti-MRC NOMA in Dual-Hop Full-Duplex AF Relaying Networks

Toka¹,

Güven²,

Durmaz³

et al. 2021

Preprint

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In this paper, the performance of a power domain downlink multiple-input multiple-output non-orthogonal multiple access system in dual-hop full-duplex (FD) relaying networks is investigated over Nakagami-𝑚 fading channels by considering the channel estimation error and feedback delay. Particularly, in the investigated system, the base station equipped with multiple antennas transmits information to all mobile users by applying conventional transmit antenna selection/Alamoutispace-time block coding scheme with the help of a dedicated FD amplify-and-forward relay. The received signals at mobile users are combined according to maximal-ratio combining technique to exploit benefits of receive diversity. In order to demonstrate the superiority of the proposed system, outage probability (OP) is investigated and tight lower bound expressions are derived for the obtained OP. Moreover, asymptotic analyses are also conducted for ideal and practical conditions to provide further insights about the outage behavior in the high signal-to-noise ratio region. Finally, theoretical analyses are validated via Monte Carlo simulations and software defined radio based test-bed implementation.

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Performance Analysis of OSTBC-NOMA System in the Presence of Practical Impairments

Cited by 15 publications

References 36 publications

Performance analyses of TAS/Alamouti‐MRC NOMA system with channel estimation error, feedback delay, and imperfect SIC

Performance analyses of TAS/Alamouti‐MRC NOMA system with channel estimation error, feedback delay, and imperfect SIC

UAV-Assisted NOMA-Based Network with Alamouti Space-Time Block Coding

Performance Analyses of TAS/Alamouti-MRC NOMA in Dual-Hop Full-Duplex AF Relaying Networks

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