Exact outage analysis of underlay cooperative cognitive networks with maximum transmit‐and‐interference power constraints and erroneous channel information

Ho-Van, Khuong

doi:10.1002/ett.2719

Cited by 8 publications

(6 citation statements)

References 41 publications

(160 reference statements)

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“…While the former is known in the secondary network prior to their transmissions, information about instantaneous channel state information (I-CSI) is acquired by overhearing I-CSI feedback from the primary network. [32][33][34][35] Further notice that, with peak interference constraint at P RX , the instantaneous transmit power at SUs is random variables as they are directly related to I-CSI corresponding to channels from secondary terminal to P RX . In the analysis of outage, we assume frequency flat block fading channels for all the links in the network, where channel characteristics remain time invariant for one transmission block (corresponding to transmission of few symbols) but changes independently from one block to another.…”

Section: System Model and Preliminary Detailsmentioning

confidence: 99%

Outage analysis of underlay cognitive NOMA system with cooperative full duplex relaying

Bisen

Babu

2019

Trans Emerging Tel Tech

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This paper investigates the outage performance of secondary users (SUs) in underlay cognitive radio-based nonorthogonal multiple access (CR-NOMA) networks. We consider down link scenario for the secondary network, which consists of a secondary transmitter (ST) and two SUs, ie, a near user and far user. The ST uses NOMA signaling to transfer the information to the down link SUs. A dedicated node is used as the full-duplex decode-and-forward (DF) relay for delivering the message to the far-user. We derive exact expressions for the outage probabilities experienced by the SUs for full duplex (FD)/half duplex (HD)-based CR-NOMA networks, in independent, nonidentically distributed Rayleigh fading channels. The maximum transmit power constraint of the secondary nodes and the tolerable interference power constraint at the primary receiver are considered for the analysis. We compare the performance of the proposed FD/HD-based CR-NOMA networks against that of a CR network, which use conventional orthogonal multiple access (OMA) scheme. We establish that the performance of CR-NOMA network is better as compared to CR-OMA networks. We then consider finding the optimal location for the FD relay node that minimizes the outage probability of far-user. We formulate an optimization problem that is solved using genetic algorithm. Numerical results show that optimized relay location significantly improves the outage performance of the far-user. The analytical results are validated by extensive simulation studies.Trans Emerging Tel Tech. 2019;30:e3701.wileyonlinelibrary.com/journal/ett

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Section: System Model and Preliminary Detailsmentioning

confidence: 99%

Outage analysis of underlay cognitive NOMA system with cooperative full duplex relaying

Bisen

Babu

2019

Trans Emerging Tel Tech

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“…Then, motivated by the potential benefits of cognitive radio and cooperative techniques, several recent works analyse the performance of cooperative secondary networks under spectrum sharing constraints [5][6][7][8][9][10][11][12]. For instance, the outage probability of a dual-hop CN under Nakagami-m fading is investigated in [5], which shows that the diversity order is dominated by the fading severity between the two hops of the secondary network.…”

Section: Introductionmentioning

confidence: 99%

Outage performance of a network coding aided multi‐user cooperative secondary network

Mafra

Souza

Rebelatto

et al. 2015

Trans. Emerging Tel. Tech.

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We evaluate the performance of a network‐coded cooperative secondary network in a cognitive radio system under spectrum sharing constraints. The secondary network is composed of multiple sources that cooperate to transmit their own information to a common secondary destination. The outage probability is analysed under a given maximum interference constraint set by the primary network as well as to the maximum transmit power limit of the secondary sources. Moreover, we also obtain a closed‐form equation for the ϵ‐outage capacity, that is, the maximum information rate achieved by the secondary sources given a target outage probability. Also, we resort to the Dinkelbach algorithm in order to find the optimum number of parity packets that maximises the ϵ‐outage capacity. The influence of the number of source nodes and another system parameters in the secondary's performance is also evaluated, and we show through theoretical and numerical results that cooperative communication with network coding can provide significant gains in terms of outage probability and diversity order when compared with non‐cooperative or traditional cooperative. Copyright © 2015 John Wiley & Sons, Ltd.

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“…Because the destination node receives multiple independently faded copies of the transmitted information from the source and relay nodes, cooperative diversity is achieved. Inspired by the remarkable potential for performance improvement, several works have introduced RC into CR to overcome the performance loss caused by power constraint . Specially, in , by neglecting the presence of the direct link, the outage probability of simple dual‐hop cognitive cooperation relaying was analysed over Nakagami‐ m fading channels.…”

Section: Introductionmentioning

confidence: 99%

Outage performance and ergodic capacity of multiuser cognitive MIMO AF relaying systems with MUS/MRT/RAS over Nakagami‐m fading channels

Jia

Xie

Yang

et al. 2015

Trans. Emerging Tel. Tech.

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To improve the performance of cognitive spectrum‐sharing systems and to reduce the implementation complexity of multiple antenna systems, a cognitive multiple‐input multiple‐output (MIMO) amplify‐and‐forward relay cooperation (C‐MIMO AF‐RC) multiuser system is considered over Nakagami‐m fading channels by integrating maximum ratio transmission (MRT), multiuser selection (MUS) and receive antenna selection (RAS) techniques. In the C‐MIMO AF‐RC multiuser systems, all secondary users (SUs) are equipped with multiple antennas while the primary users (PUs), single antenna. The interested cognitive systems are investigated under the case where the systems have perfect or imperfect channel state information (CSI) of both the SUs–SUs and SUs–PUs links so that the effect of outdated CSI can be achieved. Specially, we first obtain the exact closed‐form expressions of the cumulative distribution function of end‐to‐end signal‐to‐noise ratio. Secondly, we perform a comprehensive comparison investigation on outage probability and ergodic capacity. Specially, based on moment generating function, the exact closed‐form expression of ergodic capacity is achieved. Finally, to highlight the insight of the effect of key system parameters, the high signal‐to‐noise ratio asymptotic analysis of outage probability is performed as well as diversity and coding gains, by considering the two cases where the systems have perfect or imperfect CSI of both the SUs–SUs and SUs–PUs links. The derivations clearly show that the CSI concerning SUs–PUs links only affects the coding gain, but not the diversity order. However, the CSI concerning the SUs–SUs links plays a key role on the achievable diversity order. In particular, when the CSI of SUs–SUs links is perfect, the C‐MIMO AF‐RC multiuser systems achieve the full diversity including not only MRT diversity but also MUS and RAS diversities. In contrast, when the CSI concerning secondary links is outdated, the MUS and RAS diversities disappear, and the MUS and RAS only improve coding gain. The remaining diversity is achieved through MRT.

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Exact outage analysis of underlay cooperative cognitive networks with maximum transmit‐and‐interference power constraints and erroneous channel information

Cited by 8 publications

References 41 publications

Outage analysis of underlay cognitive NOMA system with cooperative full duplex relaying

Outage analysis of underlay cognitive NOMA system with cooperative full duplex relaying

Outage performance of a network coding aided multi‐user cooperative secondary network

Outage performance and ergodic capacity of multiuser cognitive MIMO AF relaying systems with MUS/MRT/RAS over Nakagami‐m fading channels

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