Abstract: Worldwide Interoperability for Microwave Access (WiMAX) emerged with an aim of providing voice, data, video and multimedia services on mobile phones at high speeds and cheap rates. For this we study system architecture, radio aspects of the air interface (such as frequency band, radio access modes, multiple access technologies, multiple antenna technologies and modulation), mobility and Quality of Service (QoS). For this we need to discuss various modulation schemes such as Quadrature Amplitude Modulation, Quadrature Phase Shift Keying, encoding methods such as RS, CRC, Convolution and OFDM that are vital for performance of WiMax system. Then first compare the performance of different modulation schemes such as Quadrature Amplitude Modulation and Quadrature Phase Shift Keying with these systems and get the best modulation schemes with less BER. Then with the combination of modulation schemes analyze the different encoding schemes such as Cyclic Redundancy Code and Reed – Solomon encoding with these systems. After that redesign the WIMAX system with best encoding and modulation schemes.

Keywords: WiMAX, OFDM, BER, CRC, RS

| DOI: 10.17148/IJIREEICE.2019.8207