Diamond relay network under Rayleigh fading: On-off power control and outage-capacity bound

Dai, Mingjun; Hu, Ping; Sung, Chi Wan

doi:10.1109/isita.2010.5649159

Cited by 7 publications

(7 citation statements)

References 13 publications

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“…The proposed scheme is compared with the Alamouti-Coded Decode-andForward (ACDF) scheme [15]. Then, for the considered asymmetric Gaussian diamond relay channel, we analyze various achievable rates by comparing with the capacity upper bound.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…We first compare the proposed scheme with the ACDF scheme [15], which can ensure that the outage probability curve is the steepest possible at high SNR, and can thus outperform a number of coding schemes in simultaneous relaying mode. However, according to ACDF, if a message cannot be decoded by a relay, the relay will simply remain silent; in which case, the information contained the received signal will serve no useful purpose in terms of diversity gain.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The two-relay diamond topology was first proposed in [7] and later investigated in [8][9][10][11][12] to establish the capacity upper bound and information theoretic properties. Moreover, for simplicity, most of the existing literature on the two-relay diamond networks, such as [14][15][16][17][18] restrict attention to the symmetric diamond topology, wherein the channel gains within the multiple access part and the broadcast parts are identical. However, the long standing issue is to establish the achievable maximum rate of information flow as the channel capacity of the diamond model remains unknown, even for the non-fading symmetric case with AWGN [9], [10].…”

Section: Introductionmentioning

confidence: 99%

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A two-relay asymmetric diamond cooperative diversity system over Rayleigh fading channels

Ali

Abbas

Halim

et al. 2014

2014 International Conference on Robotics and Emerging Allied Technologies in Engineering (iCREATE)

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A new cooperative communication scheme is presented for asymmetric diamond cooperative relaying networks consisting of two half-duplex relay nodes where both the broadcast and the multiple access part are subject to additive while Gaussian noise. The deterministic cooperative strategy captures the key wireless properties under Rayleigh fading and optimally combines the signals received at sink to enhance diversity gain and throughput. The achievable rates are studied using a number of relaying strategies derived as a generalization of amplify-and-forward, decode-and-forward and detect-andforward. The key feature of the proposed model is that each relay can adaptively choose between the forwarding schemes in accordance with the received instantaneous signal strength. We demonstrate the efficiency of the proposed model in achieving the capacity upper bound. Empirically, the proposed model is shown to be nearly optimal for a number of fading scenarios.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A two-relay asymmetric diamond cooperative diversity system over Rayleigh fading channels

Ali

Abbas

Halim

et al. 2014

2014 International Conference on Robotics and Emerging Allied Technologies in Engineering (iCREATE)

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“…However, how to set the amplifying factor of an AAF relay node has yet to be specified. It is observed in that letting all the relays always transmit with full power achieves diversity order no more than one, while full diversity order is obtained by appropriate power control in . Asynchronisation assumption : When a feedback channel that carries CSI is not available, the use of STTC may be used , but its detection complexity is high. To reduce the complexity, some other transmission schemes have also been proposed in the literature, namely, time‐reversal DSTBC with DF relay nodes , orthogonal frequency‐division multiplexing‐DSTBC with FGAF relay nodes and shift‐orthogonal ST block codes with either DF or FGAF relay nodes .…”

Section: Cooperative Strategies For Wireless Relay Channelsmentioning

confidence: 99%

Survey on cooperative strategies for wireless relay channels

Dai

Wang

Zhang

et al. 2014

Trans. Emerging. Tel. Tech.

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Cooperative communication has the potential of providing better throughput and reliability to wireless systems when compared with direct communication. To realise the potential gain, it is important to design cooperative strategies for some representative scenarios. This survey deals with three basic wireless relay channels, namely, the parallel relay channel, the multiple‐access relay channel and the broadcast relay channel. For the first channel, which models a single unicast connection, various forwarding strategies are studied. For the second and third channels, which model, respectively, the uplink and downlink scenarios with multiple unicast connections; network codes that exploit the possibility of coding among the connections are studied. The common aim pertaining to the studies of all these three channels is to use the limited radio resource in the most efficient way. Beside the aforementioned conventional works, studies that have state‐of‐the‐art assumptions for relay networks, including outdated channel state information at the transmitter, full duplex relay and practical rateless‐coded cooperation, are also extensively reviewed. Copyright © 2014 John Wiley & Sons, Ltd.

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“…The operation at the relay nodes is on-off AF and that at the destination node is decoupled symbol-wise ML decoding. We remark that this work is a non-trivial generalization of the power control rule in [28] to more than two parallel relay nodes.…”

mentioning

confidence: 99%

Distributed On-Off Power Control for Amplify-and-Forward Relays with Orthogonal Space-Time Block Code

Dai

Sung

Wang

2011

IEEE Trans. Wireless Commun.

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A single source-destination pair communicating via a layer of parallel relay nodes under quasi-static slow fading environment is investigated. One existing transmission protocol is considered, namely, the combination of the distributed version of the half symbol-rate complex constellation orthogonal spacetime block codes (OSTBC) with adaptive amplify-and-forward (AAF) relaying strategy. We call this transmission protocol as distributed orthogonal space-time block coded adaptive amplifyand-forward (DOSTBC-AAF). To improve the performance of DOSTBC-AAF, a distributed on-off power control (OOPC) rule applied to the relays is analytically derived and is proved to achieve full diversity order. The outage performance of DOSTBC- AAF with and without power control is evaluated. Our simulation results show that DOSTBC-AAF with all relays transmitting at full power (FP) achieves no diversity gain, whereas DOSTBC-AAF with OOPC achieves full diversity order. Correspondingly, at high signal-to-noise ratio (SNR), the diversity-multiplexing tradeoff (DMT) achieved by DOSTBC-AAF (OOPC) is analytically derived and is numerically shown to outperform DOSTBC-AAF (FP) significantly.Index Terms-Orthogonal space-time block codes (OSTBC), amplify-and-forward (AF), parallel relay network, power control.

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Diamond relay network under Rayleigh fading: On-off power control and outage-capacity bound

Cited by 7 publications

References 13 publications

A two-relay asymmetric diamond cooperative diversity system over Rayleigh fading channels

A two-relay asymmetric diamond cooperative diversity system over Rayleigh fading channels

Survey on cooperative strategies for wireless relay channels

Distributed On-Off Power Control for Amplify-and-Forward Relays with Orthogonal Space-Time Block Code

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