Performance analysis of adaptive decode-and-forward relaying in noncoherent cooperative networks

Nguyen, Hau Van; Tran, Nghi H.; Nguyễn, Hải Thanh

doi:10.1186/1687-1499-2013-281

Cited by 3 publications

(2 citation statements)

References 19 publications

(40 reference statements)

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“…Cooperative relay network technology has attracted significant interests due to the superior spectral efficiency. Various cooperative relaying schemes have been proposed, such as denoise-and-forward (DNF) [2][3][4], decode-and-forward (DF) [5,6], and amplify-andforward (AF) [7][8][9][10][11][12]. Specifically, the spatially correlated fading channels are considered in [13], which is more practical and challenging.…”

Section: Introductionmentioning

confidence: 99%

Generalized Beamforming Design for Cooperative MIMO Multirelay Networks with Infinite Constraints and Imperfect CSI

Duan

Sun

et al. 2018

Mathematical Problems in Engineering

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A generalized base station-relay-user equipment (BS-Relay-UE) beamforming design is investigated for a cooperative multipleinput multiple-output (MIMO) multirelay networks with imperfect channel state information (CSI). In order to minimize the worstcase mean square error (MSE) which is subject to a semi-infinite (SI) relay power constraints, a generalized optimal beamforming structure for the relay amplifying matrix is effectively proposed, and then the SI relay power constraints are converted into linear matrix inequalities (LMIs) version. In such conversion, the objective problem recasts as a decoupled biconvex semidefinite programming (SDP) one which can be efficiently solved by the proposed alternating algorithm. The system performance has been verified in terms of worst-case MSE using a set of qualitative analyses. The results show us that the proposed beamforming method outperforms the conventional schemes and can also effectively reduce the computational complexity when it is compared to the cutting-set schemes and also to the nonrobust ones.

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Section: Introductionmentioning

confidence: 99%

Generalized Beamforming Design for Cooperative MIMO Multirelay Networks with Infinite Constraints and Imperfect CSI

Duan

Sun

et al. 2018

Mathematical Problems in Engineering

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“…Furthermore, increasing the network size will improve outage performance. Performance analysis of adaptive decode-and-forward relaying in non-coherent cooperative networks was analysed in [9]. In [10], the authors considered the performance of distributed space-time coded cooperative relay networks based on inter-relay communications.…”

Section: Introductionmentioning

confidence: 99%

Outage performance of low-latency decode-and-forward cooperative wireless networks

Zdravković

Cvetković

Kansanen

et al. 2016

J Wireless Com Network

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In this paper, we study a noise-limited low-latency decode-and-forward cooperative network set in a dynamic environment prone to link blockage. We analyse outage probability (OP) performance considering a temporally correlated fading channel between cooperating nodes employing a threshold-based protocol for internode communication. Exact and asymptotic analytical expressions for OP over Rayleigh fading, when maximal-ratio combining is applied at the destination, are derived. Asymptotic results give a better insight into outage performance at high average signal-to-noise ratio (SNR). We analyse the OP dependence on the SNR and link blockage probability and correlation coefficient of the estimated and actual internode SNR. The results illustrate that the internode protocol improves outage performance in the whole range of average uplink SNR. Internode channel correlation has a significant effect on the OP in the range of low average internode SNR. With increasing correlation, the OP increases up to an order of magnitude. The results also show that link blockage has a dominating effect on OP performance. The finite probability of all internode links being blocked reduces network performance to a single-link scenario, regardless of using the threshold-based protocol.

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Co-Efficient Vector Based Differential Distributed Quasi-Orthogonal Space Time Frequency Coding

Nwanekezie,

Simpson,

Owojaiye

et al. 2023

Sensors

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Distributed space time frequency coding (DSTFC) schemes address problems of performance degradation encountered by cooperative broadband networks operating in highly mobile environments. Channel state information (CSI) acquisition is, however, impractical in such highly mobile environments. Therefore, to address this problem, designers focus on incorporating differential designs with DSTFC for signal recovery in environments where neither the relay nodes nor destination have CSI. Traditionally, unitary matrix-based differential designs have been used to generate the differentially encoded symbols and codeword matrices. Unitary based designs are suitable for cooperative networks that utilize the amplify-and-forward protocol where the relay nodes are typically required to forego differential decoding. In considering other scenarios where relay nodes are compelled to differentially decode and re-transmit information signals, we propose a novel co-efficient vector differential distributed quasi-orthogonal space time frequency coding (DQSTFC) scheme for decode-and-forward cooperative networks. Our proposed space time frequency coding scheme relaxes the need for constant channel gain in the temporal and frequency dimensions over long symbol periods; thus, performance degradation is reduced in frequency-selective and time-selective fading environments. Simulation results illustrate the performance of our proposed co-efficient vector differential DQSTFC scheme under different channel conditions. Through pair-wise error probability analysis, we derive the full diversity design criteria for our code.

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Performance analysis of adaptive decode-and-forward relaying in noncoherent cooperative networks

Cited by 3 publications

References 19 publications

Generalized Beamforming Design for Cooperative MIMO Multirelay Networks with Infinite Constraints and Imperfect CSI

Generalized Beamforming Design for Cooperative MIMO Multirelay Networks with Infinite Constraints and Imperfect CSI

Outage performance of low-latency decode-and-forward cooperative wireless networks

Co-Efficient Vector Based Differential Distributed Quasi-Orthogonal Space Time Frequency Coding

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