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BER Calculation using Matlab Simulation for OFDM Transmission

Lecture Notes in Engineering and Computer Science 01/2008;
Source: DOAJ
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    ABSTRACT: In this paper, the Bit Error Rate (BER) performance of Fast Fourier Transform-based Orthogonal Frequency Division Multiplexing system (FFT-Based OFDM) is compared with Discrete Cosine Transform-based Orthogonal Frequency Division Multiplexing system (DCT-Based OFDM) using Binary Phase Shift Keying (BPSK) as a modulation technique over Additive White Gaussian Noise environment (AWGN) and Multipath Rayleigh Fading environment. From the results it is clear that, the BER shift in case of DCT-Based OFDM is less as compared to FFT-Based OFDM. In addition to this we have also compare the BER performance of FFT-Based & DCT-Based OFDM over Additive White Gaussian Noise environment and Multipath Rayleigh Fading environment and it is observed that Bit Error Rate performance of FFT-Based & DCT-Based OFDM over AWGN is better than Multipath Rayleigh Fading environment.
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    ABSTRACT: The actual and next communication schemes tend to use OFDM systems in order to provide high baud rates, less intercarrier interference, and less intersymbol interference. OFDM has become the core of most 4G communication systems as fixed Wi-Fi system (IEEE802.11a standard), mobile Wi-Fi system (IEEE802.11b standard), fixed WiMAX system (IEEE802.16a standard), mobile WiMAX system (IEEE802.16e standard), and Long Term Evolution (LTE) system. In this paper the detailed simulation of different OFDM systems with different constellation mapping schemes will be obtained using MATLAB-2011 program to study the effect of various design parameters on the system performance. Noise Ratio (SNR).
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    ABSTRACT: Orthogonal Frequency Division Multiplexing (OFDM) as needed for the wireless communication system is proven. OFDM has already been applied in the wireless LAN and it is also used with the Multiple Input Multiple Output (MIMO) technique to improve the transmission performance in the multi-fading channel. There is now an increasing demand to transmit digital video, internet data in an indoor environment. A solution to avoid the prohibitive cost of installing dedicated wires for this application is to transmit Data over the Power Line (DoPL). However, LV power lines present a very harsh environment for high frequency communication signals. The high frequency signal undergoes attenuation due to line loss and impedance mismatch because of branches and loads. Also, the dynamics of system changes the topology of the network very frequently. In order to understand more about OFDM technique, in this paper we have studied and simulated about the process of sending the digital data/information with 16-Quadrature Amplitude Modulation (QAM) OFDM.

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