Efficient implementation of OFDM waveform on Xilinx FPGA

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) is a promising modulation technique because of its ability to handle multipath frequency selective channels with a simple receiver. The objective of this project is to design and implement a baseband OFDM transmitter and receiver on FPGA hardware and MATLAB. The work includes designing of easily reconfigurable and adaptable modules for modulation and demodulation, synchronization, channel estimation, equalization under AWGN and multipath Rayleigh channel. A separate header file is made in FPGA that includes all the parameters that can be reconfigured without changing the rest of the design implemented. All modules are designed on MATLAB as well as on FPGA using Verilog programming language and implemented on Spartan 6 board. Chip scope is used to provide interface between user and the hardware. Results are compared with theoretical results provided by MATLAB bit error tool.