�Performance Analysis of WiMAX Physical  Layer Using Different Code Rates & Modulation  Schemes�

Harish Prajapati; Mrs. B.Harita; Mr. Rajinder Bhatia

Volume : I, Issue : X, July - 2012

�Performance Analysis of WiMAX Physical Layer Using Different Code Rates & Modulation Schemes�

Harish Prajapati, Mrs. B. Harita, Mr. Rajinder Bhatia

Abstract :

WiMAX (Worldwide Interoperability for Microwave Access) is a technology based on the IEEE 802.16 specifications. Since it offers high level of services by many it is considered as 4G technology. All the work is done in WiMAX physical layer, which is based on OFDM system. This Paper deals with the performance analysis of Convolution coded WiMAX system at different rates (e.g.1/2, 1/3 & 1/4) in AWGN & Rician fading channel. Performance of AWGN & Rician fading channels are compared in WiMAX based system. With result we could say that AWGN channel shows better result then Rician channel. BPSK and QPSK modulation techniques are also compared at each rate; BPSK modulation technique shows better results at different rates & as the code rate decreases performance increases. Orthogonal Frequency Division Multiplexing have been used to achieve high data rate necessary for intensive application. Orthogonality is maintained by use of FFT (size is 256).