Design and Implementation of FFT Processor for OFDMA System Using FPGA
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2016, Vol 4, Issue 2
Abstract
Orthogonal Frequency Division Multiplexing(OFDM),is a frequency-division multiplexing(FDM) scheme utilized as a digital multi-carrier modulation(MCM) method.A large number of closely-spaced orthogonal sub-carriers are used to carry data. The data is divided into several parallel data streams or channels, one for each sub carrier. Each sub-carrier is modulated with conventional modulation scheme (such as QAM or PSK) at a low symbol rate, maintaining total data rates similar to conventional single-carrier modulation schemes in same bandwidth.In the receiver down link module of Orthogonal Frequency Division Multiple Access(OFDMA) system, there is needed an alterable points FFT Processor. Therefore, it is meaningful to design a FFT processor for the FFT processor which input data points could be alterable. In this paper, we select the 2D Fourier transform algorithm as the kernel algorithm, use VHDL language to present in detail a design of two-stage pipeline structure, use Xilinx and ModelSim SE for the simulation, and verify on the spartan3E500 or Vertex-6 chip FPGA.
Authors and Affiliations
B. Mahalakshmi
Keywords
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