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Use of Internet is increasing day by day. Wi-Fi provides wireless access to the internet but range is limited to certain meters only. So concept of WiMAX is introduced to increase the range. WiMAX(1) means worldwide interoperability for microwave access. WiMAX is also known as wireless broadband. The WiMAX based on IEEE 802.16, has been one of the most important technologies in communication networks providing voice, data and video services with different type of QoS (Quality of Service) during last few years. The main purpose of this paper is to see and evaluate the performance of a WiMAX physical layer scenario for various modulation schemes, in the presence and absence of jammer. The simulator encompasses the blocks that build the physical layer of IEEE 802.16e. BER results are presented with the presence of jamming under different digital modulations schemes as well as different antennas. Simulation approach is main concern here. OPNET MODELER is the software used for the simulation purpose. Keywords-WiMAX, Physical Layer Jamming, Scrambling, OPNET MODELER, Modulation Schemes.

Analysis OF Wimax Under Jamming Effect for Various Antennas