ABSTRACT
As one kind of the candidate technologies of futurehigh speed wireless correspondence physics level , the Orthogonal Frequency Division Multiplexing (OFDM) technology has received the widespread attention. It has the high frequency spectrum efficiency and resists the multi-diameters ability, which enable it to have the considerable superiority in the wireless correspondence application. Now it has become one of the mainstream technologies to solve high speed data transmission . In the wireless communications system ,because of the high utilization of the OFDM technology, the anti-multi-diameter disturbance and frequency selectivity decline ability, the using of the dynamic subcarriers assignment technology enables the system to achieve the biggest bit rate .
In this paper, the basic principles of orthogonal frequency division multiplexing (OFDM) technology has been introduced, the implementation of OFDM system has been discussed and the OFDM system has been carried out by using C language Then using the different modulator approach to modulate. Finally, the performance and characteristics of OFDM systems have been given a brief analysis.
Keywords: OFDM, Digital Modulation, C language, Communication System Simulation
