Abstract
The WiMax (Worldwide Interoperability for Microwave Access) is a technology in<strong> </strong>broadband wireless access, which employs OFDM (Orthogonal Frequency Division Multiplexing) as an alternative transmission to enable high speed data in communication system. This research aim is to analyze the performance system of the OFDM-Based WiMAX, which used the cyclic prefix. The model was designed in four schemes of simulation method, the BPSK (Binary Phase Shift Keying, QPSK (Quadrature Phase Shift Keying), 16 QAM (Quadrature Amplitude Modulation) and 64 QAM. Each scheme was investigated BER (Bit Error Rate) on AWGN (Additive White Gaussian Noise) channel and multipath Rayleigh fading channel, which had applied the cyclic prefix. By simulation of the cyclic prefix was produced the modulation measurement of the BPSK, QPSK, 16 and 64 QAM. The performance result of Eb/No 15 dB was obtained the BER of BPSK and QPSK of 1.11E-11, the BER of 16 QAM and 64 QAM of 8.69E-06 and 0.00333 respectively. Those results indicated much smaller BER value than EbNo 0 dB which BPSK and QPSK of 1 BER, 1.5 and 1.75 BER for 16 QAM and 64 QAM respectively. In conclusion, a higher value of EbNo, hence the BER value would be lower.
Highlights
IntroductionAdvances in broadband mobile communication provide information access that easy, cheap and reliable, both in the presentation of high-speed data and multimedia accesses
This paper was proposed to investigate the performance of OFDM-Based WiMAX system using cyclic prefix implemented in the BPSK, QPSK, 16 QAM and 64 QAM modulations schemes
The schemes of simulation model were performed by Matlab software
Summary
Advances in broadband mobile communication provide information access that easy, cheap and reliable, both in the presentation of high-speed data and multimedia accesses. Those features can be provided by WiMAX technology. 802.16e standard supports portable and mobile applications, which adopts OFDM technique [2]. The OFDM as multicarrier modulation can overcome the problems of various kinds of propagation (multipath), including NLOS (Non Line Of Sight) conditions between the bases station to the user. The OFDM can overcome the problem of delay spread and the ISI (Inter Symbol Interference)
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