Optimal incremental relaying in cooperative diversity systems

Bastami, Ali H.; Olfat, Ali

doi:10.1049/iet-com.2012.0178

Cited by 11 publications

(8 citation statements)

References 22 publications

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“…Combining (4)- (6) and 12, we can obtain the outage probability of the OC-SM system. It can be seen that the outage probability of the system is a function of α.…”

Section: Outage Probability Of Oc-sm Schemementioning

confidence: 99%

“…It has been shown that full diversity orders can be achieved by these two schemes. In [5][6][7], the incremental relaying scheme which has a higher system efficiency compared with the traditional AF and DF schemes was investigated. To further compensate the efficiency loss resulting from the half-duplex restriction of cooperative relaying, a successive relaying protocol was proposed and investigated in [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Diversity‐multiplexing tradeoff of opportunistic relay system with multiple‐antenna destination

Luo¹,

Hu³

et al. 2014

IET Communications

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“…Combining (4)- (6) and 12, we can obtain the outage probability of the OC-SM system. It can be seen that the outage probability of the system is a function of α.…”

Section: Outage Probability Of Oc-sm Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Diversity‐multiplexing tradeoff of opportunistic relay system with multiple‐antenna destination

Luo¹,

Hu³

et al. 2014

IET Communications

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“…Where, T is the transmission duration and is given by 1 R TP  (12) So in FIR Probability of relay transmission R P is smaller compared to all the protocols discussed so far. This is because of the reason that In the FIR protocol, when a packet of data needs to be transmitted by relay node, symbols are transmitted a few at a time as needed instead of the entire packet [15].…”

Section: ____________________________________________________________mentioning

confidence: 99%

A Survey on Incremental Relaying Protocols in Cooperative Communication

.¹

2014

IJRET

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Cooperative communication is one of the latest techniques in wireless communication to form virtual antenna arrays. Cooperative communication is an alternative method for MIMO (Multiple input multiple output) system. This scheme assumes TDMA (Time division multiple access) channel accessing and divides the communication into two phases which includes direct transmission and retransmission by the relay terminal. A few cooperative diversity protocols ,for example fixed relaying, selection relaying and incremental relaying are used in order to perform different sorts of processing by the relay terminals, and combining at the destination terminals. Each diversity protocol exhibits its own unique performance. Fixed relaying can be further classified into amplify and forward (AF) relaying and decode and forward (DF) relaying. In AF , relay users amplifies the signal and retransmits it, and in the case of DF, the relay users decodes and retransmits the signal. The Selection relaying is performed by taking the fading coefficient into account. In this report, the recent works on incremental relaying protocol has been summarized. Incremental relaying is based on the feedback mechanism. In this scheme, relay users perform retransmission only if needed, based on the received SNR (Signal to noise ratio) or decoding error that occurs during direct transmission. It is used in cooperative communication in order to attain efficient use of degrees of freedom and to overcome bandwidth inefficiency. The authors have presented a number of protocols such as Incremental selection amplify and forward (ISAF), Joint incremental selection relaying (JISR), Fractional Incremental relaying (FIR), Selective Fractional Incremental relaying (SFIR) and Efficient Incremental relaying (EIR).

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“…instead of the exact expressions in (14) and (15). For the transmission of +1 from the inside constellation set, we have the same set of probabilities for the three decision events as well.…”

Section: Relay Knows H Sr (M Sd ω Sd ) and (M Rd ω Rd )mentioning

confidence: 99%

“…Some researchers considered other ways to prevent the forwarding of erroneous data in practical DF cooperation networks. On one hand, some adaptive/selective relaying techniques were proposed, including the link-adaptive relaying [7][8][9] and threshold-based relaying [1,[10][11][12][13][14][15]. Both approaches are executed at the relay and utilise some instantaneous channel state information (CSI) of the cooperation network to evaluate the reliability of the data received by the relay.…”

Section: Introductionmentioning

confidence: 99%

Detection with erasure for error‐propagation mitigation in decode‐and‐forward relaying with general pulse amplitude‐modulated/quadrature amplitude‐modulated signals

Lee

Shieh

2014

IET Communications

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In the research of decode-and-forward (DF) cooperative communications, it is often supposed that the included relay only transmits correctly decoded signals. This simplifies the analysis of DF cooperation. However, in practical circumstances, erroneous messages may be forwarded which makes the decision at the destination even worst. In this study, the authors formulate a special detection way, named 'detection with erasure', to make certain that the relay-forwarded signals are mostly correct. Specifically, whenever the decoded result at the relay falls into some preset 'erasure regions', the relay will not process and transmit it anymore. This effectively prevents the forwarding of erroneous messages. With general pulse amplitude-modulated or squared quadrature amplitude-modulated signals, the authors demonstrate that these erasure regions can be adjusted to minimise the end-to-end symbol error rate (SER). This detection scheme can be extended to be used in the DF cooperation employing multiple relays as well. Simulations reveal that in terms of the end-to-end SER performance, the proposed detection with erasure can outperform some signal-to-noise ratio threshold-based relaying approaches, and can perform quite similarly as compared with those decoding/combining methods realised at the destination with the advantage of less channel state information exchange.

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Optimal incremental relaying in cooperative diversity systems

Cited by 11 publications

References 22 publications

Diversity‐multiplexing tradeoff of opportunistic relay system with multiple‐antenna destination

Diversity‐multiplexing tradeoff of opportunistic relay system with multiple‐antenna destination

A Survey on Incremental Relaying Protocols in Cooperative Communication

Detection with erasure for error‐propagation mitigation in decode‐and‐forward relaying with general pulse amplitude‐modulated/quadrature amplitude‐modulated signals

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