<span>A visualizing temporal stack of synthetic aperture radar (SAR) images are presented in this work, the method is called REACTIV, which enabled us to highlight color zones that have undergone change over the detected period of time. This work has been widely tested using Google earth engine (GEE) platform, this method depends on the hue-saturation-value (HSV) of visualizing space and supports estimation only in the time domain; the method does not support the spatial estimation. The coefficient of temporal coefficient variation is coded depending on the saturation color, of which several statistical properties are described. The limitations are studied, and some applications are implemented in this study.</span>
In this work, a numerical calculation was carried out in one of the universal programs for automatic electro-dynamic design. The calculation is aimed at obtaining numerical values for specific absorbed power (SAR). It is the SAR value that can be used to determine the effect of the antenna of a wireless device on biological objects; the dipole parameters will be selected for GSM1800. Investigation of the influence of distance to a cell phone on radiation shows that absorbed in the head of a person the effect of electromagnetic radiation on the brain decreases by three times this is a very important result the SAR value has decreased by almost three times it is acceptable results.
This paper presents the implementation and investigation of the quarter phase shift keying low power detection. The receiver is designed and modeled using Matlab. It was tested for different values of SNR with a constant input signal power of 100 mW. The FFT based receiver performance is measured theoretically by transmitting 1000 information symbols from the transmitter end with 7 dB improvement at Bit Error Rate BER of 10e−4, Multi Modulation Techniques Recommended and not Recommended are simulated in this research. In this research the modulation method was selected on the basis of reducing rates of the interference in the UWB communication techniques and the essential modulation should have several types of spectrum random distribution methods to reduce the level of the interference on account of the impulse train that transmitted.
Nowadays, we are witnessing a considerable change in the field of telecommunications, be it mobile telephony, wired or wireless networks. Advances in the fields of information technology, communication, microelectronics and telecommunications have led to a massive deployment of new networks which today connect a mass of individuals and computing entities. These networks are the backbone of all services influencing both the personal and professional spheres, with almost instant access to information, social networks and the IT world. In this regard, the antennas deployed in new telecommunications systems must be able to adapt to such an environment in perpetual evolution. Indeed, with the emergence of new telecommunications standards such as the Internet of Things (IoT), new telecommunications systems must meet new requirements, including the ability to include a large number of features to meet to the growing needs of users, such as making several standards coexist on the same compact structure, reducing interference with neighboring devices, improving the transmission rate, avoiding phenomena of antenna performance degradation in the presence of external disturbance and ensuring good efficiency in receiving data. Agile antennas in radiation patterns also present themselves as potential candidates to meet the requirements imposed.
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