Performance improvement in mobile WiMAX using higher order sub carrier modulation techniques

WiMAX is a worldwide interoperability for microwave access in a wireless communication standard designed to provide 30 to 40 Megabits per sec, and it was developed by WiMAX forum. The mobile WiMAX denoted by IEEE 802.16e standard is used for analyzing. Mobile WiMAX as a potential to emerge as a reliable competitor to 3G technologies and it is generally an indoor equipment. The Orthogonal Frequency Division Multiple Access (OFDMA) is a multiuser version of the popular digital modulation schemes. The IEEE 802.16e standard define a three different physical layers. Single carrier access, OFDMA and OFDM(Orthogonal Frequency Division Multiplexing) are the three physical layers and the WiMAX forum has selected the Orthogonal Frequency Division Multiple Access as one of the basic technology for mobile and portable services. In the existing work the performance of mobile WiMAX are improved by using different subcarrier modulation techniques like BPSK, QPSK and QAM. In our proposed work, the higher order modulation techniques like 16QAM and 64QAM are analyzed and simulated for mobile WiMAX in OFDMA.