This report discusses the design and implementation of an OFDM modem for a simplex com-
munication between two PCs over a frequency selective channel. First a brief introduction is
provided by explaining the backrground and the speci?cation of the project. Then the report
deals with the system model. Each block of the OFDM system is described (IFFT/FFT, cyclic
pre?x, modulation/demodulation, channel estimation, bit loading). In the following section, the
system architecture is analysed. The transmission protocol, as well as the
are explained in details. Then, the DSP implementation is discussed. Finally, the results are
provided in the last chapter.