원문정보
초록
영어
The demands for high speed applications are growing at a faster rate. To meet theserequirements, 4G technologies are being used nowadays. COFDM based WiMax is the outcome in this direction which promises to cater these high speed and high quality applications. Worldwide Interoperability for Microwave Access (WiMax) is an IEEE 802.16 standard-based broadband wireless access (BWA) technology which employsCoded orthogonal frequency division multiplexing access (COFDM). This paper analyses Bit Error Rate for WiMax based COFDM system with QPSK modulation scheme under various channel conditions like AWGN, Rayleigh, Rician and Nakagami-m. It has been observed that performance of Nakagami fading channel is better than other fading channels.
목차
1. Introduction
2. IEEE 802.16d Specifications
3. Implementation of OFDM
4. Fading Conditions
4.1 Rayleigh Fading
4.2 Rician Fading
4.3 Nakagami-m Fading
5. Simulation Results
5.1 WiMax Under Different Fading Channel Conditions for QPSK
5.2 WiMax for AWGN Channel with Different Code Rates
5.3 WiMax for Rayleigh Fading Channel with Different Code Rates
5.4 WiMax for Rician Fading Channel with Different Code Rates
5.5 WiMax for Nakagami-m Fading Channel with Different Code Rates
6. Conclusion
References