Keywords : Dynamic frequency hopping
Engineering and Technology Journal,
2008, Volume 26, Issue 3, Pages 365-375
A fundamental problem in current cellular system is how to increase spectral efficiency of cellular system and
handle blocking in the call between the subscribers. The present research offers solution to the above problem.
In this work software simulator that can be used in the environment of cellular system is designed and
implemented. This designed system shows how to increase spectral efficiency and enhancement blocking
probability in cellular system by using Dynamic Frequency Hopping techniques. In this paper received power(Pr)
threshold is proposed as one method of Dynamic Frequency Hopping technique. In each frame, received power is
measured on the six used frequencies and the current hopping pattern is changed if the measured received power
does not achieve the required threshold on at least one of them. The results indicate increasing the spectral
efficiency by using Dynamic Frequency Hopping technique, the result of spectral efficiency versus traffic load
with Dynamic Frequency Hopping is equal to (6.5 b/s/Hz), compared with Frequency Hopping (5.2 b/s/Hz) and
GSM (3.5 b/s/Hz). This leads to an improvement in performance of system and reduce the interference allowing
the users to achieve higher data rate.