Design of data adaptive IFFT/FFT block for OFDM system

Author

Rajeswari, L.M. ; Manocha, Satish K.

Author_Institution

Dept. of Electron. & Commun. Eng., Amrita Sch. of Eng., Bangalore, India

fYear

2011

fDate

16-18 Dec. 2011

Firstpage

1

Lastpage

5

Abstract

Inverse Fast Fourier Transform/ Fast Fourier Transform (IFFT/FFT) processors are crucial blocks for an Orthogonal Frequency Division Multiplexing (OFDM) transceiver system. However, in the current OFDM systems, the system complexity and processing rate do not vary adaptively with the input data. In this paper, we propose a novel IFFT/FFT architecture for the OFDM Transceiver system that exploits the correlation between bytes of incoming information to adaptively choose between the Radix-2 and Radix- 4 algorithm. Using this architecture, we have achieved additional free data slots per frame. The transceiver system has been tested end-to-end and implemented on FPGA Board.

Keywords

OFDM modulation; fast Fourier transforms; field programmable gate arrays; radio transceivers; FPGA board; OFDM transceiver system; Radix-2 algorithm; Radix-4 algorithm; data adaptive IFFT/FFT block; inverse fast Fourier transform; Clocks; Computer architecture; Correlation; Discrete Fourier transforms; OFDM; Program processors; Transceivers; Adaptive FFT/IFFT; FFT; IFFT; OFDM;

fLanguage

English

Publisher

ieee

Conference_Titel

India Conference (INDICON), 2011 Annual IEEE

Conference_Location

Hyderabad

Print_ISBN

978-1-4577-1110-7

Type

conf

DOI

10.1109/INDCON.2011.6139435

Filename

6139435