Filter-and-forward distributed beamforming for relay networks in frequency selective fading channels

Chen, Haihua; Shahbazpanahi, Shahram

doi:10.1109/icassp.2009.4960072

Cited by 35 publications

(28 citation statements)

References 20 publications

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“…4 illustrates the probability of feasibility versus P max for different values of R min t assuming σ 2 = 0.2. The problem is called ergodically infeasible when the number of simulation runs leading to the feasibility of (15) is lower than 50% of the total runs [28]. which makes the EE maximization problem ergodically infeasible.…”

Section: Complexity Analysismentioning

confidence: 99%

Energy Efficient Precoding Design for SWIPT in MIMO Two-Way Relay Networks

Rostampoor

Razavizadeh

Lee

2017

IEEE Trans. Veh. Technol.

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This paper deals with the energy efficiency (EE) maximization problem in multiple-input multiple-output (MIMO) two-way relay networks with simultaneous wireless information and power transfer (SWIPT). The network consists of a multiple-antenna amplify-and-forward relay node which provides bidirectional communications between two multiple-antenna transceiver nodes.In addition, one of the transceivers is considered battery limited and has the capability of energy harvesting from the received signals. Assuming the network EE as the objective function, we design power splitting factor and optimum precoding matrices at the relay node and two transceivers. The constraints are transmit power of the nodes, harvested energy and quality of service of two transceivers. The resulting non-convex optimization problem is divided into three sub-problems which are then solved via an alternation approach. In addition, sufficient conditions for optimality are derived and the computational complexity of the proposed algorithm is analyzed. Simulation results are provided to evaluate the performance and confirm the efficiency of the proposed scheme as well as its convergence.

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Section: Complexity Analysismentioning

confidence: 99%

Energy Efficient Precoding Design for SWIPT in MIMO Two-Way Relay Networks

Rostampoor

Razavizadeh

Lee

2017

IEEE Trans. Veh. Technol.

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“…Cooperative relaying offers significant performance benefits in enabling connectivity, and increasing coverage, power saving, spectral efficiency, spatial diversity, and channel capacity [5,6]. A number of cooperative relaying protocols such as amplify-and-forward (AF) [7], decode-andforward (DF) [7], coded cooperation [8], compress-andforward (CF) [9], and filter-and-forward [10] are used to meet the different communication requirements [11]. In DF relaying protocol, relay decodes the information received from the source before forwarding it to the destination [12].…”

Section: Introductionmentioning

confidence: 99%

Two-way decode-and-forward cooperative systems with signal space diversity

Khan

Rao

Wang

2016

J Wireless Com Network

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In this paper, a novel scheme is proposed to enhance the spectral efficiency of a two-way cooperative relaying system, where two source terminals exchange information directly and via K intermediate relays using the three-phase two-way decode-and-forward (DF) protocol. Signal space diversity (SSD) is incorporated into the two-way cooperative relaying system in the proposed scheme that exploits the inherent diversity in the modulation signal space by rotating and expanding the ordinary constellation. The proposed SSD-based three-phase two-way DF relaying scheme exchanges four symbols in three time slots and thus doubles the spectral efficiency as compared to the conventional three-phase two-way DF relaying system, where six time slots are required to exchange the same four symbols. This improvement in spectral efficiency is achieved without adding any extra complexity, bandwidth, or transmit power. A comprehensive analysis of the proposed scheme is carried out in this paper, and closed-form expressions for various performance metrics, including error probability, outage probability, and channel capacity, are derived. It is shown that the proposed scheme provides a diversity gain equal to one higher than the number of relays. The paper also studies different schemes for the optimization of relay position and power allocation. Finally, Monte Carlo simulations are performed which confirm the validity and accuracy of the analytical framework.

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“…For collaborative relaying technique, the network with a single pair of users and multiple relay nodes equipped with single antenna has been widely investigated [1][2][3][4][5][6][7]. Zheng [1] assumed perfect knowledge of channel-state information (CSI) and proposed to optimize the beamforming vector by maximizing the destination signal-to-noise ratio (SNR) subject to total and local relay transmission power constraints.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a two-way MIMO amplify-and-forward relay network

Zhang

Chen

Pan

et al. 2014

EURASIP J. Adv. Signal Process.

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In this paper, we consider optimization of a two-way multiple-input multiple-output (MIMO) amplify-and-forward relay network which consists of a pair of transceivers and several relay nodes. Multiple antennas are equipped on the transceivers and relays. Multiple access broadcast scheme which finishes communication in two time slots is considered. In the first time slot, signals received by the relays are scaled by several beamforming matrices. In the second time slot, the relays transmit the scaled signals to the two transceivers. Upon receiving these signals, a MIMO equalizer is implemented at each transceiver to recover the desired signal. In this paper, zero forcing equalizers are used. Joint optimization of the beamforming matrices and the equalizers are realized using the following criteria: 1) the total relay transmission power is minimized subject to the minimal output signal-to-noise ratio (SNR) constraint at each transceiver, 2) the minimal output SNR of the two transceivers is maximized subject to total relay transmission power constraint, and 3) the minimal output SNR of the two transceivers is maximized subject to individual relay transmission power constraint. It is shown that the proposed optimization problems can be formulated as the second-order cone programming problems which can be solved efficiently. The validity of the proposed algorithm is verified by computer simulations.

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Filter-and-forward distributed beamforming for relay networks in frequency selective fading channels

Cited by 35 publications

References 20 publications

Energy Efficient Precoding Design for SWIPT in MIMO Two-Way Relay Networks

Energy Efficient Precoding Design for SWIPT in MIMO Two-Way Relay Networks

Two-way decode-and-forward cooperative systems with signal space diversity

Optimization of a two-way MIMO amplify-and-forward relay network

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