This chapter describes two solutions to the problem of the real-data DFT whereby the GD-BFLY, which has been designed for a radix-4 version of the FHT, is now used for the computation of the 2 n -point DFT where the transform length is a power of two, but not a power of four. ...
In this paper, an efficient method for computation of the DFT of a 2N - point real sequence by using DIT FFT with CORDIC based butterflies is presented. Most of the real world applications use long real valued sequences. By using FFT with CORDIC based butterflies, the space required on ROM...
JA Beraldin - VLSI systolic array architecture for the computation of the discrete fourier transform 被引量: 2发表: 1986年 Computation of 2n-Point Real-Data Discrete Fourier Transform version of the FHT, is now used for the computation of the 2 n -point DFT where the transform length is a...
Two conical emissions are then transformed into two cylindrical ones by a positive lens with focal length f, located at a distance f from the intermediate point of the second crystal device. By selecting four pairs of correlated modes with an eight-hole screen, |l, I〉and |r, I〉...
期刊名称:《Journal of chemical theory and computation: JCTC》 | 2017年第7期 31.Computation of NMR Shielding Constants for Solids Using an Embedded Cluster Approach with DFT, Double-Hybrid DFT, and MP2 机译:使用带有DFT、双混合DFT和MP2的嵌入式簇方法计算固体的NMR屏蔽常数 作者:Anneke Dittmer;Ge...
,N.,S. 摘要: In this paper, a general class of split-radix fast Fourier transform (FFT) algorithms for computing the length-2m DFT is proposed by introducing a new recursive approach coupled with an efficient method for combining the twiddle factors. This enables the development of higher sp...
In this paper, we present an arithmetic Sum-of-Product (SOP) based approach to implement an efficient Discrete Fourier Transform (DFT) as well as an FIR fi... R Kumar,A Mandal,SP Khatri - IEEE International Conference on Computer Design 被引量: 10发表: 2012年 Implementation scheme of SOA...
This provides us with a simple and direct way of generating a filter: we define a filter as a function of frequencyH[ω]. We then use the DFT to convertH[ω] to the sequenceh[k]. Convolvingh[k] withx[n] will then give us our filter outputy[n]! This is another way of looking...
Therefore, we need a signal of finite length so that it can be applied in practice. We apply the above formula (9) to a transformation, the variable ω = 2πk/N is brought into it to obtain the following: (10) Formula (10) is the discrete Fourier transform DFT of a signal ...
equivalent toL=M–Rsamples of overlap between adjoining segments. Most window functions taper off at the edges to avoid spectral ringing. The DFT of each windowed segment is added to a complex-valued matrix that contains the magnitude and phase for each point in time and frequency. The STFT ...