The demand for high rate of data transfer has lead to intensive research in utilizing the full potential of existing communication channels. Although the technical requirements for such related products are very high, the solutions must be cheap to implement. Whereas for satellite and cable channels, such cost effective solutions already exist, for the terrestrial link, the requirements are so high that the standard solutions are no longer feasible or lead to sub-optimal results. Orthogonal Frequency Division Multiplexing (OFDM) is a method that allows to transmit high data rates over extremely hostile channels at a comparable low complexity. In this project an attempt is being made to simulate the OFDM environment. The simulation is restricted to IFFT modulation and FFT demodulation, encoding and decoding. All the simulations are performed in MATLAB. Simulation is being performed for four different types of data :
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Random Data |
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Grayscale Bitmap Image |
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Binary File |
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Audio File |
The transceiver settings can be changed to the extent that the S/N ratio can be changed by adding Gaussian noise or by Adaptive loading, the number of bits to be transmitted, the transmitting and receiving frequencies, etc. The aim of doing the simulations was to measure the performance of OFDM under different channel conditions, and to allow for different OFDM configurations to be tested.
Click here
for the model that we have used to simulate OFDM.