| Summary: | 碩士 === 國立成功大學 === 工程科學系碩博士班 === 91 === Orthogonal Frequency Division Multiplexing （OFDM）comes from multi-carrier transmission technique. It not only alleviates the inter-symbol interference（ISI）, but also conquers the impact of the fading channel, and it can achieve high-data-rate transmission with low complexity. OFDM has already been implemented in Digital Audio Broadcasting (DAB) and the Terrestrial Digital Video Broadcasting（DVB-T）systems.
In an OFDM system, the carrier signals can be orthogonal by the Fast Fourier Transforms (FFT), so the FFT process is the key component in the OFDM system.
In this thesis, we firstly introduce the history and basic principles of OFDM, and describe several algorithms and implementation architectures of the FFT, and then discuss the hardware design and simulations. Furthermore, we depict the hardware architectures of transmitter and receiver and its implementations. In the process of designing transmitter and receiver, we first develop MATLAB programs to verify the correctness of their functions and the efficiency, and then derive Verilog HDL code in Xilinx ISE environment to describe these circuits. After functional and behavioral Verilog simulation is done, we synthesize and implement the hardware circuits designed in this thesis on Virtex-E FPGA.
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