Energy Efficiency Analysis of Two-Way DF Relay System With Non-Ideal Power Amplifiers

Cui, Qimei; Yuan, Tianpeng; Tao, Xiaofeng; Dowhuszko, Alexis A.; Jäntti, Riku

doi:10.1109/lcomm.2014.2327632

Cited by 16 publications

(20 citation statements)

References 10 publications

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“…The circuit power ranges from tens to hundreds of milliWatts, comprising mainly baseband processing and RF generation [40]. Other simulation parameters are specified in Table I, with reference to other works [15], [18], [30] and 3GPP LTE specifications [42]. For fair comparison, we ensure that all schemes involved achieve the same required data rates in both link directions over the fixed time frame T .…”

Section: Simulation Resultsmentioning

confidence: 99%

“…The three nodes, each equipped with a transmit antenna and a receive antenna, operate in the FD mode during the timeslot. Nodes A and B transmit x a and x b to node R, respectively, meanwhile node R transmits x r to the nodes A and B. Additionally, PNC is adopted to generate x r as a function of x a and x b [10], [18], [34].…”

Section: ) Fd-twr-1tsmentioning

confidence: 99%

“…In [17], the aggregated utility of EE and proportional fairness were maximized for OFDMAbased HD-TWR where the circuit power in active sub-channels was evaluated for energy consumption. In [18], the EE maximization of two timeslots decode-and-forward (DF) HD-TWR was formulated under the non-ideal TPA model and solved using a standard CVX toolbox. In [15], the EE maximization was generalized under a variety of non-ideal PA models and HD-TWR strategies (e.g., two and three timeslots TWR).…”

Section: Introductionmentioning

confidence: 99%

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Energy Efficiency Maximization of Full-Duplex Two-Way Relay With Non-Ideal Power Amplifiers and Non-Negligible Circuit Power

Cui

Zhang

et al. 2017

IEEE Trans. Wireless Commun.

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Abstract-In this paper, we maximize the energy efficiency (EE) of full-duplex (FD) two-way relay (TWR) systems under non-ideal power amplifiers (PAs) and non-negligible transmission-dependent circuit power. We start with the case where only the relay operates full duplex and two timeslots are required for TWR. Then, we extend to the advanced case, where the relay and the two nodes all operate full duplex, and accomplish TWR in a single timeslot. In both cases, we establish the intrinsic connections between the optimal transmit powers and durations, based on which the original non-convex EE maximization can be convexified and optimally solved. Simulations show the superiority of FD-TWR in terms of EE, especially when traffic demand is high. The simulations also reveal that the maximum EE of FD-TWR is more sensitive to the PA efficiency, than it is to self-cancellation. The full FD design of FD-TWR is susceptible to traffic imbalance, while the design with only the relay operating in the FD mode exhibits strong tolerance.Index Terms-Energy efficiency, full-duplex, non-ideal power amplifier, non-negligible circuit power, two-way relay.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: ) Fd-twr-1tsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Energy Efficiency Maximization of Full-Duplex Two-Way Relay With Non-Ideal Power Amplifiers and Non-Negligible Circuit Power

Cui

Zhang

et al. 2017

IEEE Trans. Wireless Commun.

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“…Cooperative two-way relay network (TWRN) technology has attracted significant interests due to the superior spectral efficiency. Several relaying schemes haven proposed, i.e., amplify-and-forward (AF) [5][6][7][8], decode-and-forward (DF) [9,10], and denoiseand-forward (DNF) [11,12]. Specifically, the cooperative relaying beamforming design has been studied in [13][14][15][16], where the authors showed the optimal solutions of the source and/or relay beamforming matrices.…”

Section: Introductionmentioning

confidence: 99%

“…Considering inaccurate channel estimation and feedback delay, the perfect channel state information (CSI), which is proposed in the above works [5][6][7][8][9][10][11][12][13][14][15][16][17][18], is usually hard to obtain in practice. By taking account into the channel uncertainties, the imperfect CSI scenario has been studied in [20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Decoupled beamforming techniques for distributed MIMO two-way multi-relay networks with imperfect CSI

Duan

Zhu

et al. 2018

J Wireless Com Network

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This paper investigates decoupled beamforming techniques for the distributed multi-input multi-output (MIMO) two-way relay networks (TWRN) with imperfect channel state informations (CSIs). The objective of this paper is to maximize the weighted sum rate (SR) with semi-infinite relay power constraints. Since the objective problem is difficult to be solved directly, considering the high signal-to-residual-interference-plus-noise ratio (SRINR) and employing the Cauchy-Schwarz inequality and S-lemma, the problem can be approximately converted into a source beamforming decoupled one. In addition, with the optimal relay beamforming design and maximum ratio combining (MRC) at the receiver, the MIMO channels are decoupled into parallel single-input single-output (SISO) channels. By this way, the suboptimal relay beamforming matrix can be efficiently obtained with minimal relay power constraint. Specifically, the semi-infinite constraints can be reformulated into a linear matrix inequality (LMI), which can be efficiently solved by using an alternating optimization algorithm. Numerical results demonstrate that our proposed decoupled beamforming scheme outperforms the existing works in terms of the SR and the computational complexity with satisfactory convergence.

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Energy-efficient resource allocation for hybrid bursty services in multi-relay OFDM networks

Zhang

Cui

Wang

et al. 2017

Sci. China Inf. Sci.

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Abstract-In this paper, we propose Mapped Two-way Water Filling (MTWF) scheme to maximize Energy Efficiency (EE) for hybrid bursty services with Quality of Services (QoS) requirements in Two-Way Multi-Relay (TWMR) OFDM networks. The bursty traffic is first analyzed by strictly proved equivalent homogeneous Poisson process, based on which the QoS requirements are converted into sum-rate constraints. The formulated non-convex EE maximization problem, including subcarrier assignment, Relay Selection (RS) and rate allocation, is NP-hard involving combinatorial optimization. To conduct optimal RS on each subcarrier without priori bursty traffic knowledge, we utilize some approximate relationships under high data rate demands to remove its dependence on two-way data rates, and simplify the whole optimization problem as well. After the optimal channel configuration is obtained, which only depends on channel conditions, subcarrier assignment is attained through Elitist Selection Genetic Algorithm (ESGA), and rate allocation of each service is fulfilled by deducing two-way water filling principle. A new equivalent optimization objective function is proposed next as the simple evaluating index in ESGA to reduce complexity. Finally, simulations are carried out to verify the superiority and convergence of our scheme, as well as the applicability for different scenarios.

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Energy Efficiency Analysis of Two-Way DF Relay System With Non-Ideal Power Amplifiers

Cited by 16 publications

References 10 publications

Energy Efficiency Maximization of Full-Duplex Two-Way Relay With Non-Ideal Power Amplifiers and Non-Negligible Circuit Power

Energy Efficiency Maximization of Full-Duplex Two-Way Relay With Non-Ideal Power Amplifiers and Non-Negligible Circuit Power

Decoupled beamforming techniques for distributed MIMO two-way multi-relay networks with imperfect CSI

Energy-efficient resource allocation for hybrid bursty services in multi-relay OFDM networks

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