2016-03-152016-03-152009-02-23http://hdl.handle.net/20.500.12688/1933Με αυτή την εργασία ο σκοπός μας είναι να μελετήσουμε μέσα από την προσομείωση την επίδραση του flat fading , λαμβάνοντας υπόψιν τις κατάλληλες ιδιότητες του ραδιοσήματος σε ένα κυψελλωτό σύστημα κινητών επικοινωνιών . Με τη χρήση του Matlab κάναμε προσομείωση της Rayleigh και Rician διάλειψης , υπολογίσαμε το outage probability και τέλος παρουσιάζουμε μια σύγκριση ανάμεσα στα μοντέλα Rayleigh και Rician .The receiver in a mobile communications environment should combine the multipath waves with randomly distributed amplitudes and phases in order to give a resultant signal that fluctuates in time and space . The short-term fluctuation in the signal amplitude caused by the local multipath is called small- scale fading . Small-scale fading can be classified as flat or frequency selective fading . In particular , a received signal is said to undergo flat fading if the mobile radio channel has a constant gain and a linear phase response over a bandwidth larger than the bandwidth of the transmitted signal . The purpose of the thesis is to study through simulation the effect of flat fading taking into account the appropriate statistical properties of the radiofrequency signals in a mobile communication system . By the use of MATLAB software , simulation results of the received signal envelope , the outage probability , etc. are presented . Finally , a comparison between the Rayleigh and Rician fading models is carried out .Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)