Improved two-way double-relay selection technique for cooperative wireless communications.

Samer Alabed3
Estimated H-index: 3
Issam Maaz2
Estimated H-index: 2
Mohammad Al-Rabayah4
Estimated H-index: 4
In this article, a novel two-way double-relay selection strategy with its bit error rate (BER) performance analysis is proposed. In this novel strategy, as a first step we choose two relays out of a set of relay-nodes in a way to maximize the system performance in terms of BER and complexity. In the second step, the selected relays apply orthogonal space-time coding scheme using the three-phase protocol to establish a two-way communication between the transceivers, which will lead to a significant improvement in the achievable diversity and coding gain with a very low decoding complexity by using a symbol-wise decoder. Furthermore, the performance of the overall system is further enhanced through the use of a network coding method at the selected relay-nodes. Moreover, this paper proposes the analytical approximation of the BER performance. As well, we show that the analytical results match perfectly the simulated ones. In addition, we prove that our strategy outperforms the current state-of-the-art ones by proposing a better cooperative communication system in terms of BER.
#1Pingping ChenH-Index: 15
#2Zhaopeng XieH-Index: 2
Last. Joel J. P. C. RodriguesH-Index: 76
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As a subfield of network coding, PNC can effectively enhance the throughput of wireless networks by mapping superimposed signals at the receiver to other forms of user messages. Over the past 20 years, PNC has received significant research attention and has been widely studied in various communication scenarios, for example, TWRC, NOMA in 5G networks, random access networks, and so on. Later on, channel-coded PNC and related communication techniques were investigated to ensure network reliabilit...
38 CitationsSource
#1Yi Fang (GDUT: Guangdong University of Technology)H-Index: 17
#2Pingping Chen (FZU: Fuzhou University)H-Index: 15
Last. Guojun Han (GDUT: Guangdong University of Technology)H-Index: 14
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A block-fading (BF) channel, also known as a slow-fading channel, is a type of simple and practical channel model that can characterize the primary feature of a number of wireless-communication applications with low to moderate mobility. Although BF channels have received significant research attention in the past 20 years, designing low-complexity, outage-limit-approaching error-correction codes (ECCs) is still a challenging issue. For this reason, a novel family of protograph low-density parit...
45 CitationsSource
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 ...
2 CitationsSource
#1Tan N. Nguyen (Ton Duc Thang University)H-Index: 9
#2Tran Hoang Quang Minh (Ton Duc Thang University)H-Index: 8
Last. Phu Tran Tin (Technical University of Ostrava)H-Index: 7
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Abstract In this paper, we propose two relay selection methods to enhance system outage performance for energy harvesting (EH) based two-way relaying protocols in wireless adhoc networks. In the proposed protocol, two source nodes communicate with each other via the assistance of multiple decode-and-forward (DF) relays using three-phase digital network coding. At the first and second phases, two sources broadcast their data to the relays. Employing a power-splitting model, the relays would harve...
17 CitationsSource
This paper proposes and analyzes a novel differential distributed beamforming strategy for decentralized two-way relay networks. In our strategy, the phases of the received signals at all relays are synchronized without requiring channel feedback or training symbols. Bit error rate (BER) expressions of the proposed strategy are provided for coherent and differential M-PSK modulation. Upper bounds, lower bounds, and simple approximations of the BER are also derived. Based on the theoretical and s...
3 CitationsSource
In this work, we are interested in implementing, developing and evaluating multi-antenna techniques used for multi-user two-way wireless relay networks that provide a good tradeoff between the computational complexity and performance in terms of symbol error rate and achievable data rate. In particular, a variety of newly multi-antenna techniques is proposed and studied. Some techniques based on orthogonal projection enjoy low computational complexity. However, the performance penalty associated...
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#1Marios I. Poulakis (UniPi: University of Piraeus)H-Index: 8
#2Antonis G. GotsisH-Index: 11
Last. Angeliki Alexiou (UniPi: University of Piraeus)H-Index: 22
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One of the most significant fifth-generation (5G) technology enablers will be device-to-device (D2D) communication, which refers to the capability of direct communication between two or more devices without the intervention of a base station and constitutes a promising way to improve spectral, energy, and latency performance, exploiting the physical proximity of communicating devices and increasing resource utilization. Furthermore, network infrastructure densification has been considered to be ...
10 CitationsSource
#1Guofa Cai (GDUT: Guangdong University of Technology)H-Index: 35
#2Yi Fang (GDUT: Guangdong University of Technology)H-Index: 17
Last. Guanrong Chen (CityU: City University of Hong Kong)H-Index: 157
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This paper investigates a two-way two-relay network-coded differential-chaos-shift-keying (DCSK) system over multipath Rayleigh fading channels. First, a decode-and-forward protocol is considered, when the two relays first decode the two users' orthogonal transmitted signals and then forward their XORed version back to the users. Based on the equal-gain-combining method at the receiver of each user, the bit-error-rate (BER), achievable diversity order, and throughput are analyzed. It is shown th...
32 CitationsSource
#1Guofa Cai (GDUT: Guangdong University of Technology)H-Index: 35
#2Yi Fang (GDUT: Guangdong University of Technology)H-Index: 17
Last. Guojun Han (GDUT: Guangdong University of Technology)H-Index: 14
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Multiresolution M-ary differential chaos shift keying (MR- M-DCSK) system enables unequal-priority transmission via exploiting non-uniformly spaced phase constellations. In this letter, an adaptive MR- M-DCSK system is proposed by using a new constellation parameter design. Aiming at maximizing the spectral efficiency, the constellation parameter is carefully selected based on signal-to-noise ratio, and then is further optimized by a new search algorithm. Both the analytical and simulat...
27 CitationsSource
#1Samer Alabed (American University of the Middle East)H-Index: 3
Abstract This work proposes novel bi-directional dual-relay selection techniques based on Alamouti space-time block coding (STBC) using the decode and forward (DF) protocol and analyzes their performance. In the proposed techniques, two- and the three-phase relaying schemes are used to perform bi-directional communication between the communicating terminals via two selected single-antenna relays that employ the Alamouti STBC in a distributed fashion to achieve diversity and orthogonalization of ...
3 CitationsSource
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