Computationally Efficient Multi-Antenna Techniques for Multi-User Two-Way Wireless Relay Networks

Alabed, Samer

doi:10.11591/ijece.v8i3.pp1684-1691

Cited by 8 publications

(11 citation statements)

References 12 publications

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“…Many studies have investigated the performance of the relaying technique either with a theoretical approach [2], or with system-level simulations [3] or with field measurements [4]. Moreover, many recent multiple antenna techniques have been proposed to improve the overall system performance in terms of bit error rate, the achievable data rate [5][6][7][8][9][10][11][12] and system complexity [13][14][15] such as space time coding techniques [5][6], beamforming techniques [7][8][9], time reversal technique [12], relay selection techniques [16][17][18][19][20][21][22][23][24][25][26][27][28], and differential techniques [6][7][8][9]. However, there are still lacks on understanding the impact of the propagation conditions on the performance of the relaying technique.…”

Section: A Basic Relay Network Is Composed Of a Base Station (Bs) Rementioning

confidence: 99%

Impact of engineering parameters on performance of relay-assisted network

Maaz

Conrat

Cousin

et al. 2020

IJEECS

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<span>This paper compares the performance of a relay assisted network to the performance given by a classical macrocell network without the presence of relay node schemes. The capacity enhancement provided by a relaying system as a function of the relay antenna height and the propagation environment surrounding the relay nodes is analyzed and discussed in details. The analysis in this work is based on the theoretical Shannon capacity where both measured/experimental path loss and calibrated path loss models are taken into consideration. In this work, we assume a decode and forward scheme, a full-duplex relaying protocol and an optimized relay location is investigated. A 30 % of improvement in the macrocell capacity is achieved with the usage of relaying scenario compared to a classical macrocell network. Furthermore, increasing the relay antenna height from 4 meters to 12 meters can significantly increase the relay capacity to more than 20 % in suburban and moderate urban environments.</span>

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Section: A Basic Relay Network Is Composed Of a Base Station (Bs) Rementioning

confidence: 99%

Impact of engineering parameters on performance of relay-assisted network

Maaz

Conrat

Cousin

et al. 2020

IJEECS

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“…These technologies offer the mobility for the user who can access to any wide range of information from any place at any time. These new systems have enhanced the capacity, the rate and the performance [1][2][3][4][5][6][7][8][9]. With this success and growth, comes great demand for people with skills and knowledge to support all aspects of wireless network disposition.…”

Section: Introductionmentioning

confidence: 99%

Efficient time reversal strategy for MISO-OFDM systems

Maaz

Alabed

2020

IJEECS

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In this work, we are interested in implementing, developing, and evaluating a time reversal strategy for a multiple-input single-output orthogonal frequency division multiplexing system. This strategy enjoys a good trade-off between the computational complexity and performance in terms of bit error rate where it offers a good coding gain by forming a beam in the direction of the destination at a price of channel state information available at the transmitter. In time reversal technique, a higher coding and diversity gain can be achieved by increasing the number of transmitting antennas, which focuses the formed beam to the direction of the destination antenna. By achieving this, the received signal-to-noise ratio can be maximized which makes time reversal a good candidate for multiple-input single-output systems while keeping a low complexity. The performance of the proposed system is evaluated in terms of bit error rate where our simulations show that the proposed strategy enjoys the full diversity gain, which is equal to the number of transmitting antennas. Moreover, a robust channel estimation technique is proposed to improve the overall system in terms of bit error rate.

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“…In two-way relaying strategies, two terminals communicate with each other through many relays in a bidirectional fashion [2][3][4][5][6][7]. According to the number of time slots required for exchanging the symbols between the communicating terminals, two-way relaying protocols can be categorized into three classes: the four-phase protocols, the three-phase protocols, and the two-phase protocols.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of bi-directional relay selection strategy for wireless cooperative communications

Alabed

2019

J Wireless Com Network

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This paper proposes a new two-way double-relay selection strategy for wireless cooperative communication systems with its bit error rate (BER) performance analysis. In this work, two relays are first chosen to maximize the overall system performance in terms of BER. Then, either the two-phase or three-phase protocol is performed to achieve two-directional communications between the communicating terminals through the selected relay nodes that apply orthogonal space-time coding (STC) scheme in a distributed fashion to improve the overall system performance with linear decoding complexity. In other words, the proposed strategy offers an improvement in the reliability of the system and enjoys very low decoding complexity by enabling a symbol-wise decoder. On the other hand, another improvement in the performance at the communication terminals is achieved by performing a network coding method at the selected relay nodes. Furthermore, we offer also analytical approximation of the BER performance for the proposed strategy where the simulation results match perfectly the analytical ones. From the simulation results section, the proposed strategy shows a substantially improved BER performance as compared to the current ones.

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Computationally Efficient Multi-Antenna Techniques for Multi-User Two-Way Wireless Relay Networks

Cited by 8 publications

References 12 publications

Impact of engineering parameters on performance of relay-assisted network

Impact of engineering parameters on performance of relay-assisted network

Efficient time reversal strategy for MISO-OFDM systems

Performance analysis of bi-directional relay selection strategy for wireless cooperative communications

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