Outage Analysis of Decode-and-Forward Cognitive Dual-Hop Systems With the Interference Constraint in Nakagami-$m$ Fading Channels

Zhong, Caijun; Ratnarajah, Tharmalingam; Wong, Kai-Kit

doi:10.1109/tvt.2011.2159256

Cited by 185 publications

(152 citation statements)

References 13 publications

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“…Under the interference constraint from one primary receiver (PR), the outage performance of CRNs with single-relay over Gaussian and Nakagami-m fading channels is analyzed in [6,7], respectively. Furthermore, the outage probabilities of CRNs with multi-relay over Rayleigh and Nakagami-m fading are derived in [8,9], respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the outage probabilities of CRNs with multi-relay over Rayleigh and Nakagami-m fading are derived in [8,9], respectively. However, all these works [6][7][8][9] assume that the primary transmitter (PT) is far way from CUs in order to ignore its transmission impact on CUs. Thus, with the consideration of PT's interference, the exact and asymptotic outage probabilities of CRNs with single-relay over Rayleigh fading are derived in [10].…”

Section: Introductionmentioning

confidence: 99%

“…Different from [6][7][8][9][10][11] that focus on the underlay CRNs with only one source-destination pair and with single-relay or multi-relay, the following works pay attention to the case of CRNs with multi-destination over Nakagami-m fading. Specifically, without the consideration of PT's interference, the outage performances of CRNs with single-relay under the interference constraints from multiple PRs, and with multi-relay under the interference constraint from one PR are investigated in [12,13], respectively.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the above works [3][4][5][6][7][8][9][10][11][12][13][14] that focus on dual-hop CRNs, a more general scenario of multihop CRNs is receiving more attention, since multihop relaying is an efficient strategy to save power, and improve connectivity or coverage. In [15], under the interference constraint from one PR, the outage performance of multihop CRNs with imperfect channel state information (CSI) over Nakagami-m fading is investigated.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Joint Spatial-Temporal Access Scheme for Multihop Cognitive Relay Networks Over Nakagami-m Fading

Zheng

Liang

et al. 2017

Wireless Pers Commun

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This paper investigates the cooperative multihop cognitive relay networks (CRNs) under a novel two-dimensional spatial-temporal opportunity model, in which free opportunity and sharing opportunity are defined to enhance the spectrum efficiency. Correspondingly, a joint spatial-temporal access scheme (JSTAS) is proposed to realize successive spectrum access for continuous data transmission. The multihop CRNs with fixed relaying employ decode-and-forward with and without signal-to-noise ratio selection, which are named as SDF and DF, respectively. Then, considering the interference constraints from multiple primary receivers, the interference of one primary transmitter and the maximum transmit powers of cognitive users, we study the outage performance of multihop CRNs with JSTAS over Nakagami-m fading. To comprehensively evaluate JSTAS, we further present the pure spatial access scheme (SAS) and the pure temporal access scheme (TAS) under the spatial-temporal opportunity model, and calculate their average network outage probabilities. Simulation results demonstrate that SDF outperforms DF, while JSTAS outperforms SAS and TAS under all considered scenarios.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Joint Spatial-Temporal Access Scheme for Multihop Cognitive Relay Networks Over Nakagami-m Fading

Zheng

Liang

et al. 2017

Wireless Pers Commun

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“…The outage probability (OP) is a first-order statistical characteristic defined as the probability that the received signal-to-interference-plus-noise ratio (SINR) is below a specified threshold value. In [8,9], the OP was investigated in the presence of interferers for transmission over Nakagami-m fading channels, which has also been applied in cognitive and relay-aided systems subjected to interference-limited Nakagami-m fading channels [10][11][12][13]. Despite its benefits, the OP fails to provide holistic insights into the design of communication systems.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of high‐speed railway communication systems subjected to co‐channel interference and channel estimation errors

Zhang

Jin²,

Zhang

et al. 2014

IET Communications

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The performance of high-speed railway wireless communication systems is studied in the presence of co-channel interference and imperfect channel estimation in the uplink. The authors derive exact closed-form expressions for the outage probability and investigate the impact of fading severity. New explicit expressions are derived for both the level crossing rate and average outage duration for illustrating the impact of mobile speed and channel estimation errors on the achievable system performance. Our results are generalised and hence they subsume a range of previously reported results.

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A smart spectrum utilization approach using multiantenna‐based cognitive relays in cognitive radio network

Samanta

Bag

et al. 2020

Int J Communication

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SummaryEfficient spectrum utilization is a promising technique for a prolonged unused radio frequency (RF) spectrum in a wireless network. In this paper, an adaptive spectrum sharing cognitive radio (CR) network has been proposed consisting of a primary user (PU) and secondary user transmitter (SU − Tx) that communicates with secondary user receiver (SU − Rx) via multiantenna‐based proactive decode‐and‐forward (DF) relay selection scheme. In our model, strategically an adaptable joint venture on underlay/overlay protocol is defined based on channel occupancy using spectrum sensing technique. Here, secondary transmitters (i.e., source transmitter) continuously sense the PU activities by energy detector and can simultaneously transmit to secondary receivers. Depending on sensing result secondary transmitters automatically switches in underlay mode if PU is active otherwise operates in overlay mode. The advantage of this scheme is that the joint mode of transmission allows the SUs to maximize their transmission rate. The outage performance at SU − Rx and closed‐form expressions of joint underlay/overlay protocol has been evaluated. The power control policies at different transmitter nodes are taken care of. With the same diversity order, a trade‐off between multiantenna and multirelay is shown. This comparison shows improvement in outage behavior when the count in relays surpasses the number of antennas. Finally, the analytical model of smart efficient spectrum utilization without harming license users in CR is validated by MATLAB simulation.

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Outage Analysis of Decode-and-Forward Cognitive Dual-Hop Systems With the Interference Constraint in Nakagami-$m$ Fading Channels

Cited by 185 publications

References 13 publications

Joint Spatial-Temporal Access Scheme for Multihop Cognitive Relay Networks Over Nakagami-m Fading

Joint Spatial-Temporal Access Scheme for Multihop Cognitive Relay Networks Over Nakagami-m Fading

Performance analysis of high‐speed railway communication systems subjected to co‐channel interference and channel estimation errors

A smart spectrum utilization approach using multiantenna‐based cognitive relays in cognitive radio network

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