Abstract
The growth in the today’s wireless communication has lend the demand of highly quality of service (QoS) in transmission. The existing telecommunication industries are providing the transmission with the speed of Kbps to Mbps while most of the industries are failed to better QoS. The significant technique called Orthogonal Frequency Division Multiplexing (OFDM) provides the better QoS but leads to high Cyclic Prefix (CP). The WIMAX (Worldwide Interoperability for Microwave Access) is a broadband wireless access technology that adopts the OFDM. This paper introduces OFDM based WIMAX system performance analysis using CP. The Simulink model is designed with 16 Quadrature Amplitude Modulation (QAM) with CP using MATLAB. The QAM scheme was examined for Bit Error Rate (BER) over Additive White Gaussian Noise (AWGN) channel and multipath Rayleigh fading channel that is subjected to the CP. The proposed OFDM system proved to possess a better BER for without fading channels. The OFDM data/image transmission includes AWGN and Rayleigh with different cyclic prefix values- 1/4, 1/8 and 1/16 is plotted. The Cyclic prefix values are changing accordingly for transmitter and receiver. When Eb/No is 22db, the BER value 6.8e-5, 5.6e-5 and 5.8e-5 generated, for 1/4, 1/8 and 1/16 different cyclic prefix values respectively. Similarly, for image transmission proposed design achieves 19.94dB of PSNR value for SNR value of 7dB with respect to code rate ½ with 16-QAM
Published Version
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