Capacity of MIMO wireless channel with full-duplex amplify-and-forward relay

Kang, Young Yun; Cho, Joon Ho

doi:10.1109/pimrc.2009.5450313

Cited by 77 publications

(72 citation statements)

References 7 publications

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“…Hence, the pre-defined SNR threshold is given by 9 In Fig. 2, the outage probability of MIMO FD relaying with ZF/ZF and MMSE/ZF schemes against the first-hop SNR is presented for fixed M CCI interferers with weak (ρ I = 0 dB) and strong interferers (ρ I = 20 dB), where Monte Carlo simulations of (13) is used to validate the new closed-form exact and lower-bound analytical expressions in (17) and (19), respectively. It is seen that the simulation and proposed 9 In the case of HD relaying, it is given as γ T = 2 2R 0 − 1 = 15. analytical expression in (17) provide a perfect match which corroborate the exactness of the proposed exact closed-form analytical expression.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Linking multiple-input-multiple-output (MIMO) techniques with full-duplex relaying systems provide a powerful capability of suppressing LI in the spatial domain and can offer higher capacity when compared to its MIMO HD relaying counterpart (see e.g., [10], [11], [16], [17]). Therefore, in the presence of MIMO FD relaying systems, joint optimization by decoding and precoding at the receiver and transmitter, respectively, can be used to mitigate the LI effects at the relay.…”

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confidence: 99%

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MIMO Full-Duplex Relaying in the Presence of Co-Channel Interference

Almradi

Hamdi

2017

IEEE Trans. Veh. Technol.

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Abstract-This paper studies the deployment of multiple-input multiple-output (MIMO) full-duplex (FD) relaying systems in a multi-cell environment, where the source and destination nodes are equipped with single antenna and communicating via a dualhop amplify-and-forward (AF) relay station with multiple receive and transmit antennas in the presence of co-channel interference (CCI). This paper addresses the fundamental challenges of loopback self-interference (LI) and CCI when incorporating FD relaying in cellular systems. Due to the higher frequency reuse in FD relaying compared to its half-duplex (HD) relaying counterpart, the CCI is expected to double as the FD relay station simultaneously schedule uplink and downlink transmission on the same channel. The optimal design of relay receive and transmit precoding weight vectors which maximizes the overall signal-to-interefernce-plus-noise ratio (SINR) is formulated by a proper optimization problem, then a closed-form suboptimal solution based on null space projection is proposed. The proposed precoding vectors are based on the added receive and transmit zero-forcing (ZF) constraints used to suppress the co-channel interference and loopback self-interfernce, respectively. To this end, exact closed-form expressions for the outage probability and ergodic capacity are derived, where a simpler lower-bound expressions are also presented. In addition, the asymptotic high signal-to-noise ratio (SNR) outage probability approximation is also considered, through which the diversity order of the null space projection (ZF/ZF) scheme is found to achieve min (NR − M, NT − 1), where NR and NT are the number of relay receive and transmit antennas, respectively, and M is the number of CCI interferers. Numerical results sustained by Monte-Carlo simulations show the exactness of the proposed analytical expressions as well as the tightness of the proposed lower-bound expressions. In addition, simulation results for the minimum mean square error (MMSE)/ZF scheme is also considered for comparison purposes. Our results reveal that MIMO FD relaying could substantially boost the system performance compared to its conventional MIMO HD relaying counterpart.Index Terms-MIMO relaying, full-duplex relaying, halfduplex relaying, zero-forcing (ZF), minimum mean square error (MMSE), outage probability, ergodic capacity, co-channel interference.

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Section: Numerical Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

MIMO Full-Duplex Relaying in the Presence of Co-Channel Interference

Almradi

Hamdi

2017

IEEE Trans. Veh. Technol.

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“…The joint precoding and decoding matrices are denoted by F and G respectively. This MU-MIMO system uses RBD, Regularized Successive Optimization THP (RSO-THP) precoding and Iterative Regularized BD (IRBD) precoding techniques (Young, 2009).…”

Section: Mateials and Methodsmentioning

confidence: 99%

Average Mutual Information Analysis of Multiple Input and Multiple Output System with Multihop Relaying in Wireless Communication System

Gulnar¹

2012

American Journal of Applied Sciences

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Problem statement: Multiple Input and Multiple Output (MIMO) system with Multihop relaying techhnique is significant and active areas of wireless communication. In a rich scattering environment MIMO antenna system provides better channel capacity and data rates than single antenna systems. To provide high throughput, reliable transmission and broad coverage, wireless relaying techniques are essential in a variety of applications. In a cellular environment a relay can be used to overcome shadowing effect due to obstacles and multihop relaying can improve the throughput for mobiles suffering from poor signal to interference, noise ratio at the edge of a cell and reduce cell size to increase spectral efficiency. Approach: This study analyzes average mutual information of the Ricean channel for single hop Multiple Input Multiple Output (MIMO) system for different antenna configuation and dependence of capacity on the Rice factor for cellular system. The asymptotic capacity of multiuser two-hop MIMO system with Regularization Block Diagonalization (RBD) precoding techniques for Indepenent Identically Distributed (IID) channal and realistic Mobile to Mobile fading channel model was examined. In this realistic model, Non-Line-Sight (NLOS) propagation conditions are assumed from source mobile station to mobile relay and also from mobile relay to destination station. A non regenerative Amplify and Forward (AF) relay is used to optimize the capacity between the source and destination and also the evaluation was made for multiuser multihop relay system with correlated fading channel model using RBD precoding matrix. Results: The simulation results for average mutual information of single hop MIMO relay system for different antenna configuration with ricean channel model, ergodic sum mutual information for two hop relay system with RBD precoding technique and mutual information results for multiuser multihop relay system with correlated channel model was presented. Conclusion/Recommendations: Cellular systems generally operated at a fairly low SINR which can be increased on each hop by adding relays. Multiuser two hop relay system with RBD precoding for realistic mobile to mobile fading channel model is simulated and compared with IID channel model. Multiuser Multi-hop relay with optimal precoding and RBD precoding technique results were analyzed for correlated fading channel and found that capacity offered by RBD precoding scheme is better than other relaying systems.

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“…A relay network with high spectral efficiency and throughput has been investigated in various research (Kang, et al, 2009;Riihonen, et al, 2011). To enhance the capacity of the relay network, a Multiple-Input, Multiple-Output (MIMO) system has been studied in other research, (Lee, et al, 2010;Wang, et al, 2005;Madsen, et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Ergodic Capacity Analysis of Full-duplex Mimo Relay Channel using Tracy-Widom Distribution with Processing Delay

Arifin¹,

Ohtsuki²

2015

IJTech

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We explore a full-duplex technique in wireless communication particularly for relay networks. We consider the relay to operate in full-duplex, which occurs when transmission and reception are conducted in the same channel. We investigate potential benefits of full-duplex technique in relay networks, which uses multiple antennas for transmission and reception combined with the Amplify-Forward (AF) scenario. We study the effects of multiple antennas in terms of relay capacity. We derive an ergodic capacity expression using the Tracy-Widom distribution. Using Singular Value Decomposition (SVD) and perfect Channel State Information (CSI), we investigate these three scenarios: First, we consider the relay to have an antenna larger than that of both source and destination. Second, we consider both relay and destination to have an antenna larger than that of the source. Third, we consider both relay and source to have antenna larger than that of the destination. We show the results that the capacity of the relay with a fullduplex technique is almost twice the capacity of an half-duplex. We show that increasing the number of destination antennas is not help much when one of the source antennas is small. Moreover, the capacity decreases due to a channel hardening effect, when the number of destination antennas is larger than that of the source.

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Capacity of MIMO wireless channel with full-duplex amplify-and-forward relay

Cited by 77 publications

References 7 publications

MIMO Full-Duplex Relaying in the Presence of Co-Channel Interference

MIMO Full-Duplex Relaying in the Presence of Co-Channel Interference

Average Mutual Information Analysis of Multiple Input and Multiple Output System with Multihop Relaying in Wireless Communication System

Ergodic Capacity Analysis of Full-duplex Mimo Relay Channel using Tracy-Widom Distribution with Processing Delay

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