VLSI Implementation of OFDM Using Efficient Mixed-Radix 8-2 FFT Algorithm with Bit Reversal for the Output Sequences

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Provided by: Research India Publications
Topic: Hardware
Format: PDF
In recent years, as a result of advancing VLSI technology, OFDM has received a great deal of attention and been adopted in many new generation wideband data communication systems such as IEEE 802.11a, HiPerLAN/2, Digital Audio/Video Broadcasting (DAB/DVB) and Asymmetric Digital Subscriber Line (ADSL), Very high speed Digital Subscriber Line (VDSL) in wireless and wired communications, respectively. FFT and IFFT are the main arithmetic kernel in the OFDM system. This paper discusses the computational complexity of several Fast Fourier Transform (FFT) algorithms, analyzes the design procedure for implementing these algorithms into hardware, and then proposes one that applies to OFDM communication system.
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