ofdm communication
Study of OFDM System and Implementation of
FFT Algorithm in VHDL
Ammu Krishnan1 , Aswathy Sivanandan1 , Indurekha P R1 , Mekha V1 , Shilpa K A
1
1
S7, B.Tech, Department of Electronics and Communication Engineering, National Institute of Technology, Calicut
Project guide: Lyla B Das, Associate Professor,
Department of Electronics and Communication Engineering, National Institute of Technology Calicut
Abstract—Increasing the performance is the best criterion for developing any communication system.The basic idea is increasing the speed and performance of the OFDMA (Orthogonal Frequency-Division Multiple Access) modulator and demodulator. The aim is to create a high level implementation of a high performance FFT for OFDM Modulator and Demodulator.
This project concentrates on developing Fast Fourier Transform
(FFT) and Inverse Fast Fourier Transform (IFFT). The work also includes in designing a mapping module, serial to parallel and parallel to serial converter module. The design uses 8point FFT and IFFT for the processing module which indicate that the processing block contain 8 inputs data. All modules in the communication system are expected to be designed and implemented using VHDL programming language. The software to be used is Xilinx.
Index Terms—OFDM System, Cyclic prefixing,
Block diagram of the OFDM system.
Transmitter section of an OFDM
information wireless, quickly and accurately. To address this need, communications engineer have combined technologies suitable for high rate transmission with forward error correction (FEC) techniques. This is particularly important as wireless communications channels are far more hostile as opposed to wire alternatives, and the need for mobility proves especially challenging for reliable communications.
OFDM is effective technique for high data rate wireless communication in multi-path channels and fading environment at reasonable complexity in wireless channels
II. T HEORY
A.
FFT Algorithm in VHDL
Ammu Krishnan1 , Aswathy Sivanandan1 , Indurekha P R1 , Mekha V1 , Shilpa K A
1
1
S7, B.Tech, Department of Electronics and Communication Engineering, National Institute of Technology, Calicut
Project guide: Lyla B Das, Associate Professor,
Department of Electronics and Communication Engineering, National Institute of Technology Calicut
Abstract—Increasing the performance is the best criterion for developing any communication system.The basic idea is increasing the speed and performance of the OFDMA (Orthogonal Frequency-Division Multiple Access) modulator and demodulator. The aim is to create a high level implementation of a high performance FFT for OFDM Modulator and Demodulator.
This project concentrates on developing Fast Fourier Transform
(FFT) and Inverse Fast Fourier Transform (IFFT). The work also includes in designing a mapping module, serial to parallel and parallel to serial converter module. The design uses 8point FFT and IFFT for the processing module which indicate that the processing block contain 8 inputs data. All modules in the communication system are expected to be designed and implemented using VHDL programming language. The software to be used is Xilinx.
Index Terms—OFDM System, Cyclic prefixing,
Block diagram of the OFDM system.
Transmitter section of an OFDM
information wireless, quickly and accurately. To address this need, communications engineer have combined technologies suitable for high rate transmission with forward error correction (FEC) techniques. This is particularly important as wireless communications channels are far more hostile as opposed to wire alternatives, and the need for mobility proves especially challenging for reliable communications.
OFDM is effective technique for high data rate wireless communication in multi-path channels and fading environment at reasonable complexity in wireless channels
II. T HEORY
A.