An aqueous extract of Platycodi radix inhibited the hydrolysis of triolein emulsified with phosphatidylcholine by pancreatic lipase in vitro and it reduced the elevation of rat plasma triacylglycerol level 2-4 h after oral administration of a lipid emulsion containing corn oil. These preliminary results suggested that the aqueous extract of Platycodi radix may inhibit the intestinal absorption ...

This paper focus on the development of the fast Fourier transform (FFT), based on Decimation-In-Time (DIT) domain by using Mixed-Radix algorithm (Radix-4 and Radix-8).Fast Fourier transforms, popularly known as FFTs, have become an integral part of any type of digital communication system and a wide variety of approaches have been tried in order to optimize the algorithm for a variety of parame...

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-T) and asymmetric digital subscriber line (ADSL), very high speed digital subscriber line (VDSL) in wireless and wired communications, respect...

The development of a new general radix-b division algorithm, based on the Svoboda-Tung division, suitable for VLSI implementation is presented. The new algorithm overcomes the drawbacks of the Svoboda-Tung techniques that have prevented the VLSI implementation. First of all, the proposed algorithm is valid for any radix b ≥ 2; and next, it avoids the possible compensation due to overflow on the...

A processor for the adaptation of the coefficients in high throughput adaptive equalizers will be presented. The accumulation operation fundamental basis of the adaptation process is split into two steps: A fine-grain carry-save accumulation with timesharing factor 2 collects the products of estimated error and input symbols over a blocklength of 16 input symbols and operates at twice the symbo...

To design a split radix fast Fourier transform is an ideal person for the implementing of a low-power FFT processor, because it has the lowest number of arithmetic operations among all the FFT algorithms. In the design of such processor, an efficient addressing scheme for FFT data as well as twiddle factors is required. The signal flow of SRFFT is the same as a redix-2 FF, and conventional addr...

In this paper, a fast radix-4 complex FFT implementation using 4-parallel SIMD instructions is presented. Four radix-4 butterflies are calculated in parallel at all stages by loading consecutive 4 elements into a register. At the last stage, every 4 elements is packed into a register and calculated in parallel. This regular data flow enables higher parallelism and an overhead reduction in data ...

CORDIC algorithms have long been used in digital signal processing for calculating trigonometric, hyperbolic, logarithmic and other transcendental functions. The algorithm requires only shift and add operations and this simplicity encourages its implementation in hardware. Traditional CORDIC architectures have focused on radix-2 implementations because of their higher accuracy. However these ar...

The Discrete Fourier Transform (DFT) is used to transform the samples in time domain into frequency domain coefficients. The Fast Fourier Transform (FFT) is a widely used algorithm that computes the Discrete Fourier Transform (DFT) using much less operations than a direct realization of the DFT. FFTs is of great significance to a wide variety of applications such as data compression, spectral a...