Experimental Analysis on Time Varied Signal for Inconsistent Traffic in Fixed WiMAX Network

Abstract

In the planning of cellular network for intended user base, the received signal strength in fading environment area of a cellular network is an important design consideration. The capacity and coverage parameter of the network is totally dependent upon received signal strength. The temporal variation in signal strength is very critical which lead to hampered many network applications. In this paper, we present an experimental result of a fixed wireless access network, where large variation in signal strength was observed during peak hours. The excess delay period due to non-line of sight (NLOS) environment is somehow reduced by raising the height of customer premises equipment (CPE) antenna.  The large variation in signal strength was monitored for 90 s at each location and recorded. This process was repeated four times in a day for busy hour and normal traffic period. Total 764 locations were monitored for three different environments. The recorded signal strength was analyzed using Mat Lab statistical tool for the path loss exponent and standard deviation. Based on these parameters, percentage coverage and outage under cell area were calculated. These parameters may be utilized for tuning the path loss model for specific environment.