An investigation of S-DF cooperative communication protocol over keyhole fading channel

Shankar, Ravi; Mishra, Ritesh Kumar

doi:10.1016/j.phycom.2018.04.027

Cited by 19 publications

(24 citation statements)

References 30 publications

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“…denote the outage probability for source to th r relay and source-th r relaydestination channel link respectively, expressed in (6) and (7) respectively.…”

Section: Multiple Relay Dual Hop Dual Phase S-dfmentioning

confidence: 99%

“…Relaying protocol improves the network's spectral efficiency (bits/second/Hertz) by forming a virtual array of multiple antennas. Relaying network generally can be divided into two categories, namely, amplify-andforward (AF) [5] and decode-and-forward (DF) [6], including S-DF [7], incremental DF [8], and so on. The DF relaying protocol decodes and re-encodes the received signal from source node, then it forwards it to the destination node.…”

Section: Introductionmentioning

confidence: 99%

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Outage Probability Analysis of Selective-Decode and Forward Cooperative Wireless Network over Time Varying Fading Channels with Node Mobility and Imperfect CSI Condition

Shankar

Mishra

2018

TENCON 2018 - 2018 IEEE Region 10 Conference

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In this work, we explore the outage probability (OP) analysis of selective decode and forward (S-DF) cooperation protocol employing multiple-input multipleoutput (MIMO) orthogonal space-time block-code (OSTBC) over time varying Rayleigh fading channel conditions with imperfect channel state information (CSI) and mobile nodes. The closed-form expressions of the per-block average OP, probability distribution function (PDF) of sum of independent and identically distributed (i.i.d.) Gamma random variables (RVs), and cumulative distribution function (CDF) are derived and used to investigate the performance of the relaying network. A mathematical framework is developed to derive the optimal source-relay power allocation factors. It is shown that source node mobility affects the per-block average OP performance more significantly than the destination node mobility. Nevertheless, in other node mobility situations, cooperative systems are constrained by an error floor with a higher signal to noise ratio (SNR) regimes. Simulation results show that the equal power allocation is the only possible optimal solution when source to relay link is stronger than the relay to destination link. Also, we allocate almost all the power to the source node when source to relay link is weaker than the relay to destination link. Simulation results also show that OP simulated plots are in close agreement with the OP analytic plots at high SNR regimes.Keywords-selective decode and forward, outage probability, time selective fading, node mobility, signal to noise ratio.

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“…denote the outage probability for source to th r relay and source-th r relaydestination channel link respectively, expressed in (6) and (7) respectively.…”

Section: Multiple Relay Dual Hop Dual Phase S-dfmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Outage Probability Analysis of Selective-Decode and Forward Cooperative Wireless Network over Time Varying Fading Channels with Node Mobility and Imperfect CSI Condition

Shankar

Mishra

2018

TENCON 2018 - 2018 IEEE Region 10 Conference

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“…The aim of the fifth-generation (5G) [1] wireless communication lies in providing very high data rates (usually the Gbps order), extremely low latency, a multiplication of base stations (BSs) channel capacity, and significant improvements in the perceived quality of service (QoS), compared to the present fourth-generation (4G) long-term evolution (LTE) network [2]. As a promising technique to overcome these challenges, cooperative wireless communication [3][4][5][6][7] has been actively investigated in recent years. The primary concept behind this type of communication system is to share resources within a network between distinct nodes.…”

Section: Introductionmentioning

confidence: 99%

PEP and OP examination of relaying network over time-selective fading channel

Shankar¹,

Mishra

2020

SN Appl. Sci.

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In this paper, we consider the selective decode and forward cooperative communication system and investigate its performance over time-selective fading in the presence of nodes' mobility and channel estimation errors. Closed-form expressions for the outage probability (OP) and per-block average pairwise error probability (PEP) are derived, considering constraints at the relay, source, and destination nodes. We assume that both dual and multiple hops are subject to independent but non-identically distributed time-selective Nakagami-m fading channel. It has been observed that with an increase in the value of shape parameter and link strength of the relay-to-destination (RD) fading link gain, the per-block average PEP performance improves. Also increasing RD link gain is more significant than increasing the shape parameter of the RD link. The OP performance for optimal power allocation factors is better than its performance for equal power allocation factors. It is demonstrated that the OP decreases with increasing the value of distance-dependent power transfer factors (PTFs). Further, it has been observed that due to the mobility of nodes and imperfect channel state information, the PEP performance of the system experiences degradation, especially for high values of signal-to-noise ratio. Furthermore, when all the nodes are static and the estimation processes are perfect, the asymptotic error floors vanish, i.e., the nodes' mobility impact is removed. Monte Carlo simulation results confirm the accuracy of the analytical results.

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“…Relay assisted cooperation is the first step towards the 5th generation (5G) wireless system, which is expected to offer up to 20Gbps in the downlink (D/L) and 10Gbps in uplink (U/L) wireless communication [2]. Numerous relaying schemes have been proposed in the existing literatures such as amplifyand-forward (AF) [3][4][5], decode-and-forward (DF) [6] and selective decode and forward (S-DF) [7][8][9][10][11][12]. However, the works [3][4][5][6] suffer from several significant drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Outage Probability Analysis of MIMO-OSTBC Relaying Network Over Nakagami-m Fading Channel Conditions

Shankar¹,

Kumar²,

Mishra³

2019

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The objective of this study is to examine the outage probability (OP) performance of the multiple-input multiple-output (MIMO) cooperative communication system over Nakagamim fading channel conditions. Source node transmits orthogonal space time block code (OSTBC) codeword to the relay & destination node and maximal ratio combiner (MRC) is used for the decoding purpose at the destination node. A mathematical framework is developed for the analysis of diversity order (DO) of the system. The closed form expression of OP is derived in terms of confluent hypergeometric function of two variables considering perfect channel state information (CSI). The Simulation results verified the accuracy of the derived analytical results. Furthermore, the results shown that the distances between the nodes significantly affect the OP performance.

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An investigation of S-DF cooperative communication protocol over keyhole fading channel

Cited by 19 publications

References 30 publications

Outage Probability Analysis of Selective-Decode and Forward Cooperative Wireless Network over Time Varying Fading Channels with Node Mobility and Imperfect CSI Condition

Outage Probability Analysis of Selective-Decode and Forward Cooperative Wireless Network over Time Varying Fading Channels with Node Mobility and Imperfect CSI Condition

PEP and OP examination of relaying network over time-selective fading channel

Outage Probability Analysis of MIMO-OSTBC Relaying Network Over Nakagami-m Fading Channel Conditions

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