Practical Guide to the MIMO Radio Channel with MATLAB® Examples

Brown, Tim; Carvalho, Elisabeth de; Kyritsi, P.

doi:10.1002/9781119944966

Cited by 106 publications

(107 citation statements)

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“…It is also apparent that, as γ d is increased the secrecy rate improves. Interestingly enough, however, it is clear that the secrecy rate for scenario II is clearly better than that of scenario I and this is clearly justified by the water-filling theorem [9]. On the other hand, To make fair comparison between our scheme and the scheme proposed in [7], our results here are based on number of relays is M = 8, we chose scenario II for comparison.…”

Section: Numerical Resultsmentioning

confidence: 93%

“…The information signal can be written as δ = √ P x ρx, where ρ is beam-forming vector matching to the right singular vector of H sr with highest singular value [9] and x is the information signal with transmitting power P x . The AN component can also be expressed as Θ = Un, where U is a matrix, whose columns form an orthonormal basis for the null space of H sr such that H sr U = 0 and U H U = I and n is Gaussian vector, the transmitter selects elements of n to be i.i.d Gaussian random variables with zero mean and variance 1 In many applications, the relay can not be equipped with multiple antennas due to the cost and the limitation of size, in these cases, exploiting multiple relays with cooperative communication is natural extension [8].…”

Section: A Scenario (I)mentioning

confidence: 99%

“…To maximize the received signal at the best relay in the first phase the beam-forming vector ρ should be ρ = h H sr * h sr * [9]. Therefore, the rate at the destination is…”

Section: B Scenario (Ii)mentioning

confidence: 99%

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Improving Physical Layer Security of AF Relay Networks via Beam-Forming and Jamming

Salem

Hamdi²

2016

2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)

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Abstract-In this paper the cooperation of beam-forming and artificial noise (AN) in two-hop amplify-and-forward (AF) relaying system is proposed to enhance the security. we consider a half duplex AF relaying network with a multi-antenna source node and a destination in the presence of a passive eavesdropper. Since channel state information (CSI) of the eavesdropper is unknown, the AN transmitted by the source in the first phase and by the relays in the second phase is in all directions except the legitimate node one. As such two scenarios are considered here,: i) when all the relays amplify and forward the information source signal ii) when only the best relay is selected to amplify and forward the information source signal. The beam-former weights and the power allocation are obtained by solving an optimization problem. Results reveal that the proposed system can provide considerable improvements in terms of secrecy rate. It is also found that increasing the AN power, relative to the information signal power, will further improve the secrecy rate.

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Section: Numerical Resultsmentioning

confidence: 93%

Section: A Scenario (I)mentioning

confidence: 99%

See 1 more Smart Citation

Improving Physical Layer Security of AF Relay Networks via Beam-Forming and Jamming

Salem

Hamdi²

2016

2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)

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“…The receiver will combine each signal or select the best copy of the signals. The probability thatall the copies has poor quality is very low [7].The Venezuelan Satellite in Ka band can be modeled as a SIMO system, because useone antenna working in a single polarization. The diversity improve thereliability performance of the communication system.…”

Section: Introductionmentioning

confidence: 99%

“…The diversity improve thereliability performance of the communication system. The diversity must generate copies of the signal independent to each other, in order to minimize the probability that all the signals face simultaneously bad propagation conditions [7].Normally for satellite communication, the channel can be modelled as the Rice distribution [7,8]. Rice distribution consist of communication paths which as a strong line of sight (LOS) component combined with several weaker multipath components [7].…”

Section: Introductionmentioning

confidence: 99%

SIMO Satellite Communication Systems over Ka Band at Venezuelan Amazonian in Rain Fading Scenarios

Guedez¹,

Gao²,

Guarirapa³

2016

Proceedings of the 2016 4th International Conference on Machinery, Materials and Information Technology Applications

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Abstract.The Amazon has the world's largest tropical forest and about the half of all freshwater in the world. The construction of the wire guided communications systems is denied byinternational environment regulation because the Amazon is a worldwide protected area.Satellite communications systems represents the best option to provide communications services to the Amazonian region. However, the quality and availability of the signals in Ka band are seriously degraded by various climate phenomena, especially the rain [1]. The footprint of the Venezuelan Satellite has a large coverage service area over the Amazonian. The rain fade leads to the degradation of the link quality with unacceptable error rate and lower system capacities. In order to overcome this problem, and keep the link properties in normal conditions (clear sky conditions) the diversity concept can be used. The diversity principle is based on the transmission of multiple copies of the same signal. The copies of the signals can be combined at the receiver or be selected the best copy of the signal. The research aim is is modeling the channel attenuation for Ka band and simulate the performance of the Venezuelan Satellite with several receive antennas similar to a Single Input Multiple Output (SIMO) system. The main purpose, is to analyze the system capacity and bit error rate of BER with lower values of Signal to Noise Ratio (SNR) and compare the results with Single Input Single Output (SISO) performance.

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Antennas

2017

Indoor Wireless Communications

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Practical Guide to the MIMO Radio Channel with MATLAB® Examples

Cited by 106 publications

References 0 publications

Improving Physical Layer Security of AF Relay Networks via Beam-Forming and Jamming

Improving Physical Layer Security of AF Relay Networks via Beam-Forming and Jamming

SIMO Satellite Communication Systems over Ka Band at Venezuelan Amazonian in Rain Fading Scenarios

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