Generalized Relay Selection for Network-Coded Cooperation Systems

Heidarpour, Ali Reza; Ardakani, Masoud; Tellambura, Chintha

doi:10.1109/lcomm.2017.2743175

Cited by 14 publications

(17 citation statements)

References 14 publications

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“…Selecting the best relay node instead of using all relays gives the full diversity gain (equal to one greater than the number of relay nodes) for the cooperative communication. Surprisingly, as shown in [4], [5], these results are not valid for NCC systems. If the number of selected relays is less than the number of sources, the full diversity gain cannot be achieved and the diversity order is equal to one greater than the number of selected relays [4].…”

Section: Introductionmentioning

confidence: 81%

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On the Performance of NCC-OFDMA with Single Relay Selection

Basaran

Kurt

Chatzigeorgiou

2018

2018 Global Information Infrastructure and Networking Symposium (GIIS)

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In this paper, we investigate the outage probability of a network coded cooperation (NCC) system in the presence of frequency selective channels with the usage of orthogonal frequency division multiple access (OFDMA) technique. As OFDMA offers a flexible design of bandwidth usage by letting smart subcarrier allocation schemes in the frequency selective channels, combining NCC with OFDMA leads to feasible transmission schemes for efficient resource utilization. A single relay selection (SRS) technique is used to alleviate the complexity of utilizing all relay nodes. This system model is referred to as NCC-OFDMA-SRS. The first approximation of outage probability expressions of the NCC-OFDMA-SRS system is derived, and the results are supported by extensive simulations. In addition, asymptotic outage probability expressions are obtained, showing that the achievable maximum diversity gain results are attained.

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Section: Introductionmentioning

confidence: 81%

“…Hence, it is demonstrated that the diversity order of an NCC system with single relay selection can reach up to 2 without using any multiplexing scheme. Multiple relay selection cases for NCC systems are also investigated in [5].…”

Section: Introductionmentioning

confidence: 99%

On the Performance of NCC-OFDMA with Single Relay Selection

Basaran

Kurt

Chatzigeorgiou

2018

2018 Global Information Infrastructure and Networking Symposium (GIIS)

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“…Since NCC systems use multiple orthogonal channels, relay selection (RS) protocols can further improve the spectral efficiency of NCC systems. Few sporadic works investigate the performance of RS NCC systems [16]- [19]. More specifically, in [16], the performance of the XOR-based NCC with RS for multiple source-destination pairs is analyzed.…”

Section: A Related Workmentioning

confidence: 99%

“…Despite the rich literature on NCC, all existing works [8]- [19] are restricted to relay networks with single-antenna terminals. Employing multiple antennas at the transmitter and/or receiver has been identified as a key enabling technique for future generation of wireless networks and has been broadly investigated in the context of CC systems [21]- [24].…”

Section: B Motivations and Contributionsmentioning

confidence: 99%

“…It can substantially reduce the required signaling overhead for RS-based NCC, particularly in a network with large number of branches without sacrificing the performance. RS Strategy B is different from those based on "max-min" criterion [17]- [19] because it requires local CSI only. Therefore, our analytical analysis are new and completely different from those earlier reported in [17]- [19].…”

Section: B Motivations and Contributionsmentioning

confidence: 99%

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Relay Selection in Network-Coded Cooperative MIMO Systems

Heidarpour

Ardakani

Tellambura

et al. 2019

IEEE Trans. Commun.

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Network-coded cooperation (NCC) has recently gained interest as it improves the network throughput in multisource cooperative systems. NCC has been studied for singleantenna terminals only. Employing multiple-input multipleoutput (MIMO) techniques can significantly improve the performance of NCC systems. Furthermore, the existing relay selection (RS) strategies for NCC utilize the "max-min" end-toend (E2E) criterion. This selection strategy (called Strategy A) is complicated even for a network with single-antenna terminals as it requires global channel state information (CSI). This requirement makes it hard to implement RS-based NCC. To counter this issue, we introduce a new RS strategy (Strategy B), which utilizes only the local CSI (not global CSI), reducing the signaling overhead significantly without sacrificing the performance. The performance of MIMO-NCC under Strategy A and B is studied over independent and non-identically distributed (i.n.i.d.) Rayleigh fading channels. Relays and the destination are equipped with multiple antennas, whereas sources have single antenna. The exact outage probability expressions of the system under consideration are derived. The asymptotic outage expressions are further provided to obtain valuable insights into the practical system-design parameters such as the diversity order and coding gain. Furthermore, numerical results are provided in support of the analytical results.

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