This tutorial describes how to accurately measure signal power using the FFT. While it is easy to calculate powers in the time domain, this is not always applicable: If a signal contains several spectral components and broadband noise, considering the frequency domain allows to measure power of these components individually or to measure SNR (by separately considering signal and noise). However...

with the advent of new technology in the fields of VLSI and communication, there is also an ever growing demand for high speed processing and low area design. It is also a well-known fact that the chip area and maximum combinational path delay (MCPD) unit forms an integral part of processor design. Due to this regard, high speed and low area architectures become the need of the day. A fast Four...

FLOWER FLAVONOID TRANSPORTER (FFT) encodes a multidrug and toxin efflux family transporter in Arabidopsis thaliana. FFT (AtDTX35) is highly transcribed in floral tissues, the transcript being localized to epidermal guard cells, including those of the anthers, stigma, siliques and nectaries. Mutant analysis demonstrates that the absence of FFT transcript affects flavonoid levels in the plant and...

With the rapid development of computer technology, general purpose CPUs have made inroads into many signal processing applications; of which the Fast Fourier Transform (FFT) continues to be an integral part. A large number of FFT algorithms have been developed over the years, notably the Radix-2, Radix-4, Split-Radix, Fast Hartley Transform (FHT), Quick Fourier Transform (QFT), and the Decimati...

The fast Fourier transform (FFT) and the power spectrum are still powerful tools for analyzing and measuring both stationary and transient signals in power systems. However, the misapplications of FFT can lead to incorrect results caused by some problems such as aliasing effect, spectral leakage, and picket-fence effect. Measurement errors can be efficiently reduced by understanding fundamental...

In this paper, we proposed an variable length FFT processor architecture which could be used in multi-mode and multi-standard OFDM communication system. Based on radix-2 single-path delay feedback architecture, FFT is implemented with the aid of LUT and control logic. The expected architecture would complete FFT ranging 2048/1024/512point. Keywords-FFT; Radix-2 FFT; variable length FFT;