Optimal relay selection for decode-and-forward opportunistic relaying

Shaqfeh, Mohammad; Al-Qahtani, Fawaz S.; Alnuweiri, Hussein

doi:10.1109/iccspa.2013.6487295

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…Diagram of the relay selection strategy with the HDAF scheme From Fig. 2, the detailed procedures of the relay selection strategy with the HDAF scheme can be summarized as follows: (14) and (15). Finally, D chooses the greatest among the two, and notifies the best relay b R to forward the source signals to the destination.…”

Section: Yes Nomentioning

confidence: 99%

“…In the absence of direct link, the performance of the DF cooperative communication systems under different source-relay and relay-destination in fading channel were studied in [14] and the superiorities were verified. The optimal relay selection policy for the decode-and-forward opportunistic relaying systems was researched in [15], but the error propagation occurred due to the wrong decoding in the relays. In [16], joint relay selection and power allocation were investigated to maximize system throughput with limited interference to primary users in the Cognitive Radio (CR) systems.…”

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Improved Relay Selection Strategy for Hybrid Decode-Amplify Forward Protocol

Zhang¹,

Jiang²,

Bao³

et al. 2016

jcm

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-To improve the problems of noise amplification and error propagation of the fixed cooperation schemes in cooperative communications, a relay selection strategy is proposed based on the hybrid decode-amplify-forward protocol. It can adaptively determine cooperation schemes according to the Channel Status Information (CSI) of the source-relay. Then it selects the best relay from the candidate relay set of the two fixed cooperation schemes, for a maximum Signal-Noise Ratio (SNR) in the destination. The theoretical analyses and the simulation results all show that the proposed strategy can improve the performance of the Bit-Error-Rate (BER) and the outage probability significantly, when compared with the relay selection strategies of the fixed cooperation schemes. Also it performs excellent with the increased number of the relays. Index Terms-Amplify-and-Forward, decode-and-forward, hybrid decode-amplify forward, BER, outage probability I. INTRODUCTION Nowadays, cooperative communications have been the research hot-spots in modern wireless communications. And there are mainly three relay cooperation schemes in cooperative communications, such as the Amplify and Forward (AF) [1], the Decode and Forward (DF) [2], and the Coded Cooperation (CC) [3]. The outage performance of the AF and the DF schemes in cooperative wireless communication was evaluated in literature [4], which indicated that the performance of the DF scheme was better than that of the AF scheme, and the outage performance was improved with the increased number of the cooperative relays. And the exact closed-form expression of the outage probability has been derived in [5] for the coded cooperation by using the power-based approach over the Nakagami-m fading channels. Furthermore, the optimal number of the relays was also obtained and the critical cooperation ratio was found for minimum total outage probability. Except for the AF, the Manuscript . His research interests include modern wireless communication and coding, MIMO multi-user detection and so on.

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confidence: 99%

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Improved Relay Selection Strategy for Hybrid Decode-Amplify Forward Protocol

Zhang¹,

Jiang²,

Bao³

et al. 2016

jcm

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“…In a uni-directional strategy, the operation of the relay is similar to the operation of a decode-forward (DF) relay [40], [41] in a point-to-point relay channel where the message flow is uni-directional. Namely, the relay decodes all signals in the uplink, and re-transmits the signals to the respective destinations in the downlink 3 .…”

Section: B a Uni-directional Strategymentioning

confidence: 99%

Cyclic Communication and the Inseparability of MIMO Multi-Way Relay Channels

Chaaban

Sezgin

2015

IEEE Trans. Inform. Theory

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The K-user MIMO multi-way relay channel (Y-channel) consisting of K users with M antennas each and a common relay node with N antennas is studied in this paper. Each user wants to exchange messages with all the other users via the relay. A transmission strategy is proposed for this channel. The proposed strategy is based on two steps: channel diagonalization and cyclic communication. The channel diagonalization is applied by using zeroforcing beam-forming. After channel diagonalization, the channel is decomposed into parallel sub-channels. Cyclic communication is then applied, where signal-space alignment for network-coding is used over each sub-channel. The proposed strategy achieves the optimal DoF region of the channel if N ≤ M . To prove this, a new degrees-of-freedom outer bound is derived. As a by-product, we conclude that the MIMO Y-channel is not separable, i.e., independent coding on separate sub-channels is not enough, and one has to code jointly over several sub-channels.

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A new fuzzy based joint DF relay selection and link adaptation

Taki

Omid

2015

2015 International Conference on Communications, Signal Processing, and Their Applications (ICCSPA'15)

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Optimal relay selection for decode-and-forward opportunistic relaying

Cited by 6 publications

References 11 publications

Improved Relay Selection Strategy for Hybrid Decode-Amplify Forward Protocol

Improved Relay Selection Strategy for Hybrid Decode-Amplify Forward Protocol

Cyclic Communication and the Inseparability of MIMO Multi-Way Relay Channels

A new fuzzy based joint DF relay selection and link adaptation

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