Analysis of the efficiency of space­time access in the mobile communication systems based on an antenna array

Alsaleem, Naors Y. Anad; Kashmoola, Mohammed A.; Moskalets, Mykola

doi:10.15587/1729-4061.2018.150921

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…The first column from the left also consists of alphabetical letters arranged in the column; the letters represent an encryption key, each containing the row specified by the letter, and are the repetition of the alphabet that appeared from that letter. You can learn more about the history of the cipher and how to use it by [7][8][9][10]. Table 2 Vigenere Table A It can also be represented mathematically by using the following two equations:…”

Section: Vigenere Ciphermentioning

confidence: 99%

Encoding syriac letters in partition theory using extended Vigenere cipher

Sami¹,

Mahmood²

2020

EEJET

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Section: Vigenere Ciphermentioning

confidence: 99%

Encoding syriac letters in partition theory using extended Vigenere cipher

Sami¹,

Mahmood²

2020

EEJET

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“…It should be noted that the emergence of unwanted interference also occurs in the radio communication systems, where the use of the radiofrequency resource is very well planned. The essence of unwanted interference is due to the fact that the REM radiation can lead to negative consequences and create an unwanted effect in systems for which this radiation was not intended [3].…”

Section: Introductionmentioning

confidence: 99%

Method for determining the responses from a non-linear system using the Volterra series

Ahmed

Aziz

Alsaleem

et al. 2020

EEJET

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A methodology has been proposed for estimating the nonlinear effects in radio tracts of receiving and transmitting devices in radio-electronic means of mobile communication systems, based on using the nonlinear transfer functions of the higher-order Volterra series. A procedure has been devised for obtaining the output responses from a nonlinear non-inertia circuit under the harmonious input action using a method for determining the transfer functions of higher orders obtained on the basis of the transfer functions of lower orders. We have derived the analytical expressions for the output responses from a nonlinear system of different orders for three inputs for the case of representing a nonlinear system in the form of a nonlinear non-inertia circuit. The values of the transfer functions of higher orders for a nonlinear non-inertia circuit were determined by using a state variable method. This paper demonstrates the derivation of analytical expressions to calculate a harmonic coefficient based on the second and third harmonics using the nonlinear higher-orders transfer functions of a nonlinear non-inertia circuit. It has been shown that the use of the nonlinear transfer functions to the fifth order inclusive allows a more accurate assessment of nonlinear effects in the form of the harmonious and intermodulation distortions in the radio tracts of radio-electronic means of mobile systems. The outlined technique for determining the nonlinear transfer functions is invariant to the topology of a nonlinear electrical circuit, as well as to the quantity and type of nonlinear elements. Existing estimation procedures of electromagnetic compatibility related to the problems of calculating intermodulation interference can be improved by the introduction of the determined magnitudes of influence products. The proposed methodology makes it possible to evaluate the set of nonlinear effects in the problems related to electromagnetic compatibility in the groups of radio-electronic means with the accuracy required by users

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“…The creation of new global telecommunication systems and networks, the intensive development of corporate communication systems, a significant increase in personal communications and the volume of services provided highlights the problem of electromagnetic compatibility (EMC) of various telecommunications, and in particular radio-electronic means of transmitting and receiving information [1].…”

Section: Introductionmentioning

confidence: 99%

Model of dynamics of the grouping states of radio electronic means in the problems of ensuring electromagnetic compatibility

Kashmoola¹,

Alsaleem²,

Alsaleem³

et al. 2019

EEJET

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Analysis of the efficiency of spacetime access in the mobile communication systems based on an antenna array

Cited by 3 publications

References 5 publications

Encoding syriac letters in partition theory using extended Vigenere cipher

Encoding syriac letters in partition theory using extended Vigenere cipher

Method for determining the responses from a non-linear system using the Volterra series

Model of dynamics of the grouping states of radio electronic means in the problems of ensuring electromagnetic compatibility

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Analysis of the efficiency of space­time access in the mobile communication systems based on an antenna array

Cited by 3 publications

References 5 publications

Encoding syriac letters in partition theory using extended Vigenere cipher

Encoding syriac letters in partition theory using extended Vigenere cipher

Method for determining the responses from a non-linear system using the Volterra series

Model of dynamics of the grouping states of radio electronic means in the problems of ensuring electromagnetic compatibility

Contact Info

Product

Resources

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Analysis of the efficiency of spacetime access in the mobile communication systems based on an antenna array