The Experts below are selected from a list of 27 Experts worldwide ranked by ideXlab platform
Seiran Khaledian - One of the best experts on this subject based on the ideXlab platform.
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reflectfx in band full duplex wireless communication by means of reflected power
IEEE Transactions on Communications, 2017Co-Authors: Besma Smida, Seiran KhaledianAbstract:In this paper, we introduce a new full-duplex wireless communication system, named ReflectFX, that relies on backscatter modulation. This paper offers a new concept for two-way wireless communication: rather than avoiding self-interference as in half-duplex, or combatting self-interference as in conventional full-duplex, nodes will re-use the received interfering Radio-Carrier waves to transfer information. The electromagnetic waves are modulated and reflected by the same antenna that receives them. We consider two nodes, a base-station and an end-user, that wish to exchange data over a wireless Rayleigh fading channel with additive white Gaussian noise. With ReflectFX, the end-user receives a self-interference free signal. We improve the transmission range of ReflectFX by adding negative resistance to the end-user load. We derive an expression for the overall achievable throughput and ergodic capacity of ReflectFX. Simulation results show that ReflectFX outperforms both conventional full-duplex and half-duplex.
Bernhard Schrenk - One of the best experts on this subject based on the ideXlab platform.
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chip scale remote Radio head interface for full duplex coherent optical wireline wireless network leveraging coherent mobile fronthauling through analogue opto electronics
Wireless Communications and Networking Conference, 2018Co-Authors: Bernhard SchrenkAbstract:A novel remote Radio head interface facilitating wireless-wireline integration in optical fronthaul networks is proposed and experimentally evaluated. In particular I show bidirectional coherent analogue optical Radio signal transmission with a single photonic laser device for the first time. The injection locking capability utilized for the externally modulated laser enables precise opto-electronic translation of the Radio Carrier frequency, even in presence of wavelength emission drift of light sources. Proof-of-concept is made for Radio downlink signals with up to 1-GHz bandwidth. The simplicity of the mobile fronthaul interface is guaranteed by the sufficiency of the coherent detection scheme that does not depend on optical-layer digital signal processing as required in state-of-the-art coherent optical systems. I demonstrate full-duplex transmission of 100-MHz 64-ary quadrature amplitude modulated orthogonal frequency division multiplexed signals through frequency division duplex. The performance is experimentally validated at low error vector magnitudes of 5.3% over a 27.5 km reach, 1:128 split network.
Besma Smida - One of the best experts on this subject based on the ideXlab platform.
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reflectfx in band full duplex wireless communication by means of reflected power
IEEE Transactions on Communications, 2017Co-Authors: Besma Smida, Seiran KhaledianAbstract:In this paper, we introduce a new full-duplex wireless communication system, named ReflectFX, that relies on backscatter modulation. This paper offers a new concept for two-way wireless communication: rather than avoiding self-interference as in half-duplex, or combatting self-interference as in conventional full-duplex, nodes will re-use the received interfering Radio-Carrier waves to transfer information. The electromagnetic waves are modulated and reflected by the same antenna that receives them. We consider two nodes, a base-station and an end-user, that wish to exchange data over a wireless Rayleigh fading channel with additive white Gaussian noise. With ReflectFX, the end-user receives a self-interference free signal. We improve the transmission range of ReflectFX by adding negative resistance to the end-user load. We derive an expression for the overall achievable throughput and ergodic capacity of ReflectFX. Simulation results show that ReflectFX outperforms both conventional full-duplex and half-duplex.
Rahim Tafazolli - One of the best experts on this subject based on the ideXlab platform.
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subband filtered multi Carrier systems for multi service wireless communications
IEEE Transactions on Wireless Communications, 2017Co-Authors: Lei Zhang, Ayesha Ijaz, Pei Xiao, Atta Ul Quddus, Rahim TafazolliAbstract:Flexibly supporting multiple services, each with different communication requirements and frame structure, has been identified as one of the most significant and promising characteristics of next generation and beyond wireless communication systems. However, integrating multiple frame structures with different subCarrier spacing in one Radio Carrier may result in significant inter-service-band-interference (ISBI). In this paper, a framework for multi-service (MS) systems is established based on a subband filtered multi-Carrier system. The subband filtering implementations and both asynchronous and generalized synchronous (GS) MS subband filtered multi-Carrier (SFMC) systems have been proposed. Based on the GS-MS-SFMC system, the system model with ISBI is derived and a number of properties on ISBI are given. In addition, low-complexity ISBI cancelation algorithms are proposed by precoding the information symbols at the transmitter. For asynchronous MS-SFMC system in the presence of transceiver imperfections, including Carrier frequency offset, timing offset, and phase noise, a complete analytical system model is established in terms of desired signal, inter-symbol-interference, inter-Carrier-interference, ISBI, and noise. Thereafter, new channel equalization algorithms are proposed by considering the errors and imperfections. Numerical analysis shows that the analytical results match the simulation results, and the proposed ISBI cancelation and equalization algorithms can significantly improve the system performance in comparison with the existing algorithms.
Lei Zhang - One of the best experts on this subject based on the ideXlab platform.
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subband filtered multi Carrier systems for multi service wireless communications
IEEE Transactions on Wireless Communications, 2017Co-Authors: Lei Zhang, Ayesha Ijaz, Pei Xiao, Atta Ul Quddus, Rahim TafazolliAbstract:Flexibly supporting multiple services, each with different communication requirements and frame structure, has been identified as one of the most significant and promising characteristics of next generation and beyond wireless communication systems. However, integrating multiple frame structures with different subCarrier spacing in one Radio Carrier may result in significant inter-service-band-interference (ISBI). In this paper, a framework for multi-service (MS) systems is established based on a subband filtered multi-Carrier system. The subband filtering implementations and both asynchronous and generalized synchronous (GS) MS subband filtered multi-Carrier (SFMC) systems have been proposed. Based on the GS-MS-SFMC system, the system model with ISBI is derived and a number of properties on ISBI are given. In addition, low-complexity ISBI cancelation algorithms are proposed by precoding the information symbols at the transmitter. For asynchronous MS-SFMC system in the presence of transceiver imperfections, including Carrier frequency offset, timing offset, and phase noise, a complete analytical system model is established in terms of desired signal, inter-symbol-interference, inter-Carrier-interference, ISBI, and noise. Thereafter, new channel equalization algorithms are proposed by considering the errors and imperfections. Numerical analysis shows that the analytical results match the simulation results, and the proposed ISBI cancelation and equalization algorithms can significantly improve the system performance in comparison with the existing algorithms.
