Outage Probability and SER of Amplify-and-Forward Cognitive Relay Networks

Yu, Huogen; Tang, Wanbin; Li, Shaoqian

doi:10.1109/wcl.2013.012513.120834

Cited by 24 publications

(37 citation statements)

References 13 publications

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“…In this paper, different unlicensed users allocated with different maximum interference power levels is investigated and hence, more general than all previous works with the assumption of the same maximum interference power level for all unlicensed users such as [3,5,6,[8][9][10][11][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. As analysed thoroughly in [3,5,6,11,14,15,18,[24][25][26]29], I m stands implicitly for the interference limit from unlicensed users and excludes interference generated by licensed users. Equivalently, the licensed networks are implicitly assumed to operate reliably for interference levels caused by unlicensed users up to I m , regardless of the interference already existing in these networks.…”

Section: System Modelmentioning

confidence: 99%

On The Performance of Underlay Relay Cognitive Networks

Ho-Van

Bao

2013

REV-JEC

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Abstract-The bit error rate (BER) performance of underlay relay cognitive networks in the presence of Rayleigh fading is thoroughly analyzed in this paper. New exact and asymptotic analytic expressions under consideration of both interference power constraint and maximum transmit power constraint are derived in closed-form and are extensively corroborated by Monte-Carlo simulations. These expressions facilitate in evaluating effectively the network performance behaviour in key operation parameters as well as in optimizing system parameters. A multitude of analytical results expose that underlay relay cognitive networks experience the performance saturation phenomena while their performance considerably depends on the number of hops for the linear network model. Additionally, optimum relay position is significantly dependent of maximum transmit power, maximum interference power, and licensee location. Moreover, the appropriate order of locating unlicensees with different maximum transmit power levels can dramatically improve the network performance.

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Section: System Modelmentioning

confidence: 99%

On The Performance of Underlay Relay Cognitive Networks

Ho-Van

Bao

2013

REV-JEC

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“…Performance of SU under AF relay selection scheme has been investigated in [15], [16] under the assumption of perfect CSI. In [17], the performance of SU in terms of outage and symbol error rate (SER) has been evaluated for a Rayleigh faded channel considering maximum transmit power constraint of the relay. In the above references, SU is assumed to perfectly know the CSI of link between SU transmitter (SU-Tx) and PU receiver (PU-Rx).The CSI is used in deriving the transmit power of SU.…”

Section: Introductionmentioning

confidence: 99%

“…In [24], the capacity of SU is evaluated under both the average and peak interference constraints considering channel estimation error and feedback delay of the channel considering a Rayleigh faded channel. In [17], the performance of SU is evaluated under the maximum transmit power constraint of the relay with perfect CSI. In this paper we extend the analysis of [17] with imperfect CSI model of [24] in presence of multiple AF relays.…”

Section: Introductionmentioning

confidence: 99%

“…In [17], the performance of SU is evaluated under the maximum transmit power constraint of the relay with perfect CSI. In this paper we extend the analysis of [17] with imperfect CSI model of [24] in presence of multiple AF relays. A power allocation scheme has also been designed to avoid the extra interference on PU caused due to imperfect CSI.…”

Section: Introductionmentioning

confidence: 99%

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Performance of a Cognitive Relay Network under AF Relay Selection Scheme with Imperfect Channel Estimation

Prasad¹,

Roy²,

Kundu³

2016

RADIOENGINEERING

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“…However, sometimes a relay station taking feedback/acknowledgement from the receiver to adjust the gain is called the variable gain AF relay. The concepts of an AF relay are summarized in [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Selection of the Best Two-Hop AF Wireless Link under Multiple Antenna Schemes over a Fading Channel

2015

J Inf Process Syst

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In evaluating the performance of a dual-hop wireless link, the effects of large and small scale fading has to be considered. To overcome this fading effect, several schemes, such as multiple-input multiple-output (MIMO) with orthogonal space time block codes (OSTBC), different combining schemes at the relay and receiving end, and orthogonal frequency division multiplexing (OFDM) are used in both the transmitting and the relay links. In this paper, we first make compare the performance of a two-hop wireless link under a different combination of space diversity in the first and second hop of the amplify-and-forward (AF) case. Our second task in this paper is to incorporate the weak signal of a direct link and then by applying the channel model of two random variables (one for a direct link and another for a relayed link) we get very impressive result at a low signal-to-noise ratio (SNR) that is comparable with other models at a higher SNR. Our third task is to bring other three schemes under a two-hop wireless link: use of transmit antenna selection (TAS) on both link with weak direct link, distributed Alamouti scheme in two-hop link and single relay antenna with OFDM subcarrier. Finally, all of the schemes mentioned above are compared to select the best possible model. The main finding of the paper is as follows: the use of MIMO on both hops but application TAS on both links with weak direct link and the full rate OFDM with the sub-carrier for an individual link provide a better result as compared to other models.

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Outage Probability and SER of Amplify-and-Forward Cognitive Relay Networks

Cited by 24 publications

References 13 publications

On The Performance of Underlay Relay Cognitive Networks

On The Performance of Underlay Relay Cognitive Networks

Performance of a Cognitive Relay Network under AF Relay Selection Scheme with Imperfect Channel Estimation

Selection of the Best Two-Hop AF Wireless Link under Multiple Antenna Schemes over a Fading Channel

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