Implementation and Performance Evaluation of OFDM Transceiver

Orthogonal Frequency Division Multiplexing (OFDM) transmissions are emerging as important modulation technique because of its capacity of ensuring high level robustness against interference. The actual and next communication schemes tend to use OFDM systems in order to provide high baud rates and less inter symbol interference. Some examples are 802.11, 802.16, MC-CDMA, Digital Video Broadcasting among others. Trying to provide a solution to the new devices emerging, slow standard adoption, poor spectrum use, etc. Joe Mitola introduced the concept of “Software Defined Radio�, which involves exhaustive configurable digital signal processing like FFT, therefore FPGAs could support many of its operations. This work presents a FPGA design, validation and implementation of an “Orthogonal Frequency Division Multiplexing� (OFDM) modulator for IEEE 802.11a, also reports the resources requirements for the presented system. In this paper the design and implementation of OFDM system will be illustrated as well as a detailed simulation of the OFDM system using MATLAB-2013 program to study the effect of various design parameters on the system performance, also the design and simulation results for some standards of OFDM using MATLAB will be observed as a practical system examples that uses OFDM as a modulation technique.