Samer Alabed
American University of the Middle East
9Publications
3H-index
13Citations
Publications 9
Newest
#1Samer Alabed (American University of the Middle East)H-Index: 3
#1Samer AlabedH-Index: 3
Last. Mohammad Al-RabayahH-Index: 4
view all 3 authors...
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 significa...
#1Issam Maaz (American University of the Middle East)H-Index: 2
#2Jean-Marc ConratH-Index: 6
Last. Samer Alabed (American University of the Middle East)H-Index: 3
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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 ...
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#1Issam Maaz (American University of the Middle East)H-Index: 2
#1Issam Maaz (American University of the Middle East)
Last. Samer Alabed (American University of the Middle East)H-Index: 3
view all 2 authors...
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...
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#1Samer Alabed (American University of the Middle East)H-Index: 3
#1Samer Alabed (American University of the Middle East)H-Index: 3
Many noncoherent distributed strategies for cooperative sensor networks that do not require channel knowledge at any antenna to overcome the overhead involved in channel estimation are lately suggested; however, these strategies suffer from low system performance in terms of bit error rate (BER) and a comparably high decoding complexity. Differential beamforming strategies have recently been proposed to overcome these problems; however, they are implemented using the four-phase protocol. Thus, w...
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#1Samer Alabed (American University of the Middle East)H-Index: 3
#1Samer Alabed (American University of the Middle East)H-Index: 3
In this work, a newly designed multiple-input multiple-output (MIMO) detector for implementation on software-defined-radio platforms is proposed and its performance and complexity are studied. In particular, we are interested in proposing and evaluating a MIMO detector that provides the optimal trade-off between the decoding complexity and bit error rate (BER) performance as compared to the state of the art detectors. The proposed MIMO decoding technique appears to find the optimal compromise be...
1 CitationsSource
#1Samer Alabed (American University of the Middle East)H-Index: 3
#1Samer Alabed (American University of the Middle East)H-Index: 3
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
#1Samer Alabed (American University of the Middle East)H-Index: 3
#1Samer Alabed (American University of the Middle East)H-Index: 3
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
#1Samer Alabed (American University of the Middle East)H-Index: 3
#1Samer Alabed (American University of the Middle East)H-Index: 3
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...
3 CitationsSource
#1Samer Alabed (American University of the Middle East)H-Index: 3
#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