Abstract
Problem statement: Worldwide Interoperability for Microwave Access is the broadband wireless technology for terrestrial broadcast services in Metropolitan Area Networks. This BWA technology is based on Orthogonal Frequency Division Multiplex (OFDM) technology and considers the radio frequency range up to 2-11 GHz and 10-66 GHz. The objective of this research work is the performance analysis of AWGN, SUI-1 and SUI-2 fading channels in IEEE802.16d using FEC to improving BER at different SNR under QPSK digital modulation technique. Approach: Channel coding part is composed of three steps randomization, Forward Error Correction (FEC) and interleaving. FEC is done in two phases through the outer Reed Solomon (RS) and inner Convolutional Code (CC). The implementation and analysis will be made on using MATLAB simulation. Results: In this analysis the Bit Error Rate under QPSK modulation technique over AWGN, SUI-1 and SUI-2 fading channel with encoder for a SNR value of 5dB but in the case of without encoder is found SNR value of 9dB,10dB and 8dB respectively. Conclusion: It was concluded that all the three fading channel had same SNR with FEC .The optional Block Turbo Coding (BTC) can be implemented to enhance the performance of FEC.
Highlights
The rapid growth of wireless internet causes a demand for high-speed access to the World Wide Web
To serve the demand for access to the internet “anywhere any time” and ensure quality of service, the IEEE 802.16 working group brought out a new broadband wireless access technology called WiMAX meaning Worldwide Interoperability for Microwave Access
Later the standard extended its operation through different PHY specification to 2 -11 GHz frequency band enabling Non Line Of Sight (NLOS) connections, which require techniques that efficiently mitigate the impairment of fading and multipath (Koffman and Roman, 2002)
Summary
The rapid growth of wireless internet causes a demand for high-speed access to the World Wide Web. To serve the demand for access to the internet “anywhere any time” and ensure quality of service, the IEEE 802.16 working group brought out a new broadband wireless access technology called WiMAX meaning Worldwide Interoperability for Microwave Access. To serve the demand for access to the internet “anywhere any time” and ensure quality of service, the IEEE 802.16 working group brought out a new broadband wireless access technology called WiMAX meaning Worldwide Interoperability for Microwave Access It is the most recent solution for the provision of fixed broadband wireless services in a wide geographical scale and proved to be a real effective solution for the establishment of wireless metropolitan area networks. The outer RS encoded block is fed to inner binary convolutional encoder has rate of 1/2
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