Carptahian Journal of Electronic and Computer Engineering

4

Authors: T. Krausz, J. Sztrik

We can use variety of encryption standards to encrypt data traffic to ensure the safety of wireless networks. The question is to what extent the security of the network affects network performance. For answering this question, experiments were performed without data encryption, and the use of various encryption standards.

4

Authors: M. Tatarko, L. Ovseník, J. Turán

The paper describe a new method for switching in hybrid Free Space Optics/ Radio Frequency (FSO/RF) link based on use of simple Fog Sensor. Fog Sensor operation principle is described with experimental method of how to do switching between FSO and RF link in hybrid transmission system. Results of experimental verification of the proposed switching method are discussed.

5

Authors: J. Tóth, M. Tatarko, L. Ovseník, J. Turán, J. Ružbarský

Free Space Optics technology is a new progressive communication form. The basic FSO link is made of two FSO heads which communicate through a laser beam on a specific wavelength. FSO link requires a direct visibility between its nodes. It is a very efficient form for data transmission for short distance communication links. This paper describes basic FSO features with consideration on negative weather factors which have the negative influence on signal transmission. The unique fog sensor will be presented in this paper. This device gathers some specific data about weather conditions. Measured data is processed mathematically and results can be used in further FSO link evaluation as well as in process of switching FSO link with some form of back up radio link.