The Design And Implementation Of The Baseband Signal Procession Of OFDM

With the development of wireless communication, the transmission ratio of communication system is being paid more and more attention. More and more governments and companies began to focus on how to communicate as efficiently as possible, as high-speedily as possible, as safely as possible. In order to improve the application of spectrum and modulation of multi-carriers, OFDM is presented as a new technology that every carrier is orthogonal and its spectrum is interplaced to release the inference of each carrier. The multi-carriers' modu-demodulation could be realized by IFFT/FFT. OFDM reinforced the ability to resist narrow band inference. Some inference may damage the whole link-air in the single carrier system, but only a small part of carriers could be influenced by single inference in multi-carriers system.Owing to the background above, the thesis compared and analyzed the former techniques of wireless communication system comprehensively, combining the knowledge of the OFDM, based on analysis by MATLAB, this paper design a communication platform with the main characters of OFDM and get a good effect in signal processing. IFFT is realized on this hardware platform and it is proved that the simulation on MATLAB is applicable and reasonable.