FPGA Implementation Radix-2 Architecture For Twin Data

V. Nancharaiah *, B. Sridhar **, Indira. S ***
*-*** Department of Electronics and Communication Engineering, Lendi Institute of Engineering and Technology, Vizianagaram, India.
Periodicity:September - November'2019
DOI : https://doi.org/10.26634/jcir.7.4.17453

Abstract

The fundamental operation in digital signal processing and wireless signal processing applications like Multiple Input and Multiple Output (MIMO), Orthogonal Frequency Division Multiple Access (OFDM) is a Fast Fourier Transform(FFT). FFT is the fastest way of computing Discrete Fourier Transform by way of Divide and Conquer technique. There are different ways of developing VLSI architecture for FFT processor by using Delay elements (SDF, MDF), Delay Commutators (SDC, MDC). The famous architecture for FFT processor is Single Delay Feedback (SDF) architecture which has an advantage of full (100%) hardware utilization. Another famous architecture known as Multipath Delay Commutator (MDC) has an advantage high throughput at 50% of hardware utilization. In this project, we propose VLSI hardware architecture for twin data stream processing using Radix-2 algorithm. The proposed architecture is based on pipelined MDC architecture. The proposed architecture uses both Decimation-In-Time FFT (DIT-FFT) and Decimation-In-Frequency FFT (DIF-FFT) to process even and odd samples of twin data streams. In this architecture the bit reversal operation is carried out by the proposed architecture itself. When compare to other exiting architecture to proposed work designed with shift registers, bit reverserval operation performed in FFT with a high throughput and less numbers of registers.

Keywords

FFT algorithms, N-DIF FFT, FPGA architectures, Data streams, MIMO-OFDM.

How to Cite this Article?

Nanchariah, V., Sridhar, B., and Indira, S. (2019). FPGA Implementation Radix-2 Architecture For Twin Data. i-manager's Journal on Circuits and Systems , 7(4), 27-37. https://doi.org/10.26634/jcir.7.4.17453

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