Destination‐based cooperative jamming in untrusted amplify‐and‐forward relay networks: resource allocation and performance study

Kuhestani, Ali; Mohammadi, Abbas

doi:10.1049/iet-com.2015.0078

Cited by 22 publications

(23 citation statements)

References 37 publications

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“…Moreover, in all simulations, we configure N r > N t to guarantee full multiplexing gain, and we utilize a matchedfilter precoder to beamform the cooperative jamming signal in order to secure the confidential signal at the untrusted relay. In Figure 7, we compare the secrecy rates of our proposed OPA scheme, AF-EPA, and the power allocation calculated in [31] with the proposed optimized BF for the antenna configuration (6,8,6). For comparison, we introduce two transmitted precoders, an equal BF to emit the confidential signals in all directions, and a random BF to beamform the transmitted signal in a random direction.…”

Section: Simulations and Resultsmentioning

confidence: 99%

“…Figure 2 compares the secrecy rates of different transmitted precoders with antenna configuration (6,8,6). In [31], Kuhestani et al proposed an OPA for a one-way cooperative jamming network with maximum-ratio transmission (MRT) beamforming. From Figure 2, the proposed scheme precoder provides the highest secrecy rate at all values of SNRs, while a random BF has the lowest one because its beamforming may result in no signal arriving at the destination.…”

Section: Simulations and Resultsmentioning

confidence: 99%

“…In [28], the power allocation and locations of confidential and jamming signals were analyzed in detail in terms of network security performance. The power allocation for DAJ networks was studied in [31], where the destination acted as a friendly cooperative jammer. The power-weighting coefficients of decode-and-forward (DF) and AF relay nodes were optimized to achieve the maximum secrecy capacity with a global power constraint.…”

Section: Introductionmentioning

confidence: 99%

“…In [30], the network model was extended to a multi-antenna network, and the corresponding cooperative jamming scheme was presented. The power allocation for DAJ networks was studied in [31], where the destination acted as a friendly cooperative jammer.…”

mentioning

confidence: 99%

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Joint optimization of beamforming and power allocation for DAJ-based untrusted relay networks

Yao

Mekkawy

et al. 2018

ETRI Journal

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Destination‐assisted jamming (DAJ) is usually used to protect confidential information against untrusted relays and eavesdroppers in wireless networks. In this paper, a DAJ‐based untrusted relay network with multiple antennas installed is presented. To increase the secrecy, a joint optimization of beamforming and power allocation at the source and destination is studied. A matched‐filter precoder is introduced to maximize the cooperative jamming signal by directing cooperative jamming signals toward untrusted relays. Then, based on generalized singular‐value decomposition (GSVD), a novel transmitted precoder for confidential signals is devised to align the signal into the subspace corresponding to the confidential transmission channel. To decouple the precoder design and optimal power allocation, an iterative algorithm is proposed to jointly optimize the above parameters. Numerical results validate the effectiveness of the proposed scheme. Compared with other schemes, the proposed scheme shows significant improvement in terms of security performance.

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Section: Simulations and Resultsmentioning

confidence: 99%

Section: Simulations and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Joint optimization of beamforming and power allocation for DAJ-based untrusted relay networks

Yao

Mekkawy

et al. 2018

ETRI Journal

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“…They proposed a relay selection algorithm, which maximized the achievable secrecy rate. In [8] another DBJ in an AF based secure transmission in an untrusted relay scenario is proposed. They provided an optimal power allocation strategy and gave closed form expressions for three different scenarios i.e.…”

Section: Introductionmentioning

confidence: 99%

Physical layer security: Friendly jamming in an untrusted relay scenario

Ali

Zamir

Fasih

et al. 2016

2016 24th European Signal Processing Conference (EUSIPCO)

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Abstract-This paper investigates the achievable secrecy regions when employing a friendly jammer in a cooperative scenario employing an untrusted relay. The untrusted relay which helps to forward the source signal towards the destination, could also be regarded as a potential eavesdropper. Our system employs a friendly jammer which sends a known noise signal towards the relay. In this paper, we investigate the effect of jammer and relay locations on the achievable secrecy rate. We consider two scenarios where in the first case we consider no direct transmission between the source and destination, while in the second case we include a source to destination direct link in our communication system.

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A novel relay selection algorithm using ant colony optimization with artificial noise for secrecy enhancement in cooperative networks

Jibukumar

Sabu

2018

Int J Communication

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Cooperative communication is one of the fastest growing research areas of today. It can efficiently mitigate the effect of shadowing and fading with the help of relays and proper relay selection technique. In this paper, a novel relay selection scheme combined with artificial noise (AN) is devised to enhance the secrecy of cooperative networks with amplify-and-forward scheme, over Rayleigh fading channels in the presence of a passive eavesdropper. The probability of path selection of ant colony optimization algorithm is used for selecting the best relay with high end-to-end signal-to-noise ratio. The probability of choosing a path depends on the significance of channel gain (G) and fading coefficients (h). The proposed algorithm finds the best relay in the following wireless scenarios: when (i) both channel gain and fading coefficients are significant; (ii) only fading coefficients are significant; and (iii) only channel gain is significant. Because the direct links between source and destination and source and eavesdropper are considered, AN along with the information is sent by both the source and the selected relay. The performance is evaluated based on secrecy rate (R s ); for the relays randomly placed between the source and destination and for different eavesdropper's location. The results show that the proposed relay selection scheme achieves better secrecy for different wireless scenarios compared with traditional schemes. With the help of AN, the secrecy rate can be made positive even when the eavesdropper lies near to source.

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Destination‐based cooperative jamming in untrusted amplify‐and‐forward relay networks: resource allocation and performance study

Cited by 22 publications

References 37 publications

Joint optimization of beamforming and power allocation for DAJ-based untrusted relay networks

Joint optimization of beamforming and power allocation for DAJ-based untrusted relay networks

Physical layer security: Friendly jamming in an untrusted relay scenario

A novel relay selection algorithm using ant colony optimization with artificial noise for secrecy enhancement in cooperative networks

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