This paper presents a reconfigurable FFT architecture for variable length and multistreaming WiMax wireless standard. The architecture processes 1 stream of 2048-pt FFT, up to 2 streams of 1024-pt FFT or up to 4 streams of 512-pt FFT. The architecture consists of 11 SDF pipelined stages and radix-2 butterfly is calculated in each stage. The sampling frequency of the system is varied in accordan...

This document describes a FPGA implementation and simulation of the FFT component of the IIP Radiometer RFI processor described in [1]. A possible implementation of this FFT component has been previously described in [2]. Here a single FFT processor will be implemented and tested before proceeding to a larger design consisting of many such processors. This document is broken into three separate...

FFT mainly involved important role in electronics & communication field. The various types of FFT radix algorithm have analyzed and is to be modified in future. As a result of its exhaustive computational necessities, it occupies large area and consumes high power if implemented in hardware. Efficient algorithms are developed to improve its architecture.In this paper, we have conversed about FF...

background: increase in aquatic production is dependent on raw materials, quality of diet, feed manufacture technology and optimum feed formulation. objectives: the aim of this study was investigation and quality control feed of fft, gft1 and gft2 of rainbow trout in farm and fish feed factory producers in chaharmahal and bakhtiari province. methods: in this study samples of fft, gft1 and gft2 ...

Under many research works, it has been observed that the multiple input multiple output (MIMO) system can be considered an efficient solution for the high-speed wireless communication. However, the delay spreads in non-flat fading channels abrupt the functioning of MIMO system. In orthogonal frequency division multiplexing (OFDM), the channel impulse response is flat in each sub carrier. Hence,...

Fast Fourier transforms (FFT) and Inverse Fast Fourier Transform (IFFT) processing is one of the key procedures in popular orthogonal frequency division multiplexing (OFDM) communication systems. This paper presents the study of an efficiency of the fast Fourier transform may be increased by removing operations of input values which are zero, and of output values which are not required; this pr...

This paper presents a novel high-speed, low-complexity two-parallel 128-point radix-24 FFT/IFFT processor for MB-OFDM ultrawideband (UWB) systems. The proposed high-speed, low-complexity FFT architecture can provide a higher throughput rate and low hardware complexity by using a two-parallel data-path scheme and a single-path delayfeedback (SDF) structure. The radix-24 FFT algorithm is also rea...

EXTENT stands for an EXpert system for TENsor product formula Translation. In this paper, we describe the development of programs for fast Fourier transforms (FFT) for vector multiprocessors and distributed-memory machines using the EXTENT system for formula translation. Several forms of the FFT have been presented in the literature. Each form has diierent characteristics and is best suited for...