Permutation Optimization in QRD Based Multi-Relay Systems

Long, Hang; Zheng, Kan; Wei, Meiying; Wang, Fangxiang; Wang, Wenbo

doi:10.1109/glocom.2009.5425971

Cited by 2 publications

(3 citation statements)

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“…It is demonstrated that the simultaneous use of multiple relay nodes logarithmically increases the achievable capacity between source and destination nodes [8]. Lots of papers design relay protocols in MIMO multi-relay systems [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In this study, we focus on the scenario where multiple relay nodes are used between only one source node and one destination node.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, we focus on the scenario where multiple relay nodes are used between only one source node and one destination node. Relay protocols for this scenario can be summarized as three modes as follows [9,10]:…”

Section: Introductionmentioning

confidence: 99%

“…(2) Multi-stream broadcasting: The source node broadcasts multiple data streams to multiple relay nodes, then relay nodes transmit to the destination node simultaneously to achieve the distributed diversity gain [9,[14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Performance analysis of the unicasting mode in multi‐relay systems

Long

Wei

Duan

et al. 2010

Int J Communication

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SUMMARYThe unicasting mode is a natural choice in multi-relay systems to utilize the spatial potential of source and destination nodes. In the unicasting phase, the source node transmits different data streams to several relay nodes with the downlink multi-user precoding; in the multi-accessing phase, relay nodes transmit the received data streams to the destination node simultaneously. In this paper, the received signal-tonoise-ratio (SNR) at the destination node of the unicasting mode is analyzed and derived, which can be calculated with two SNRs related to the two phases as an approximate harmonic mean function. Then, an approximate method for calculating the system ergodic capacity is presented. The inner products between singular vectors are approximately replaced by their expectations and distribution functions of singular values are derived. The numerical and simulation results demonstrate the efficiency of the analysis and the approximate method.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance analysis of the unicasting mode in multi‐relay systems

Long

Wei

Duan

et al. 2010

Int J Communication

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Nearly optimal linear transceiver design for amplify‐and‐forward MIMO multiple‐relay systems under MMSE criterion

Huang

Zhang

et al. 2012

Int J Communication

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SUMMARYIn this paper, we consider amplify‐and‐forward multiple‐input multiple‐output multiple‐relay systems, where all the nodes have multiple antennas. For enhancing link reliability, we address the problem of designing optimal linear transceiver to minimize the mean squared error (MSE) of symbol estimations subject to the total relay transmit power constraint. This problem is highly complex and has not been solved in the literature. We first simplify this optimization problem to one that takes a singular value vector and a unitary matrix as optimization variables. Then based on the analyses for the simplified problem, we develop an iterative algorithm consisting of one boundary optimization and one unitary matrix constrained optimization. We show analytically that the proposed iterative algorithm always converges, and the MSE is monotonically decreasing from one iteration to the next. Finally, numerical results demonstrate the nearly optimal performance of the proposed scheme. Copyright © 2012 John Wiley & Sons, Ltd.

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Permutation Optimization in QRD Based Multi-Relay Systems

Cited by 2 publications

References 11 publications

Performance analysis of the unicasting mode in multi‐relay systems

Performance analysis of the unicasting mode in multi‐relay systems

Nearly optimal linear transceiver design for amplify‐and‐forward MIMO multiple‐relay systems under MMSE criterion

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