The appearance of radix-2 was a milestone in the design of pipelined FFT hardware architectures. Later, radix-2 was extended to radix-2. However, radix-2 was only proposed for single-path delay feedback (SDF) architectures, but not for feedforward ones, also called multi-path delay commutator (MDC). This paper presents the radix-2 feedforward (MDC) FFT architectures. In feedforward architecture...

Scrophulariae Radix is one of the most popular traditional Chinese medicines (TCMs), which needs to be processed by 'sweating' methods. Primary processing of Scrophulariae Radix is an important link which closely relates to the quality of products in this TCM. To facilitate selection of the suitable 'sweating' processing method for Scrophulariae Radix, in this study the quality of Scrophulariae...

In this work we present a new CORDIC algorithm for the vectoring mode, based on the use of radix-4, preserving a complexity in the microrotations that is similar to that of the conventional radix-2 CORDIC. The use of this radix, together with the inclusion in the CORDIC algorithm of the zero skipping technique, reduces by more than half the number of iterations with respect to the conventional ...

Some data streaming applications make use of digital signal processing (DSP). The DSP algorithms include transcendental functions like trigonometry, inverse logarithms, exponentials, and other in addition to the basic arithmetic operations multiplication division. By modifying a few simple parameters, it is relatively generate large range functions, including logarithmic, exponential, trigonome...

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, respecti...

Recent interest in persistent memory (PM) has stirred development of index structures that are efficient in PM. Recent such developments have all focused on variations of the B-tree. In this paper, we show that the radix tree, which is another less popular indexing structure, can be more appropriate as an efficient PM indexing structure. This is because the radix tree structure is determined by...

In this paper a Split Radix FFT without the use of multiplier is designed. All the complex multiplications are done by using Distributed Arithmetic (DA) technique. For faster calculation parallel prefix adder is used. Basically high radix algorithms are developed for efficient calculation of FFT. These algorithms reduces overall arithmetic operations in FFT, but increases the number of operatio...

In this paper we present alternate form of Radix-4/8 and split radix FFT’s based on DIF (decimation in frequency) version and discuss their implementation issues that further reduces the arithmetic complexity of power-of-two discrete Fourier Transform. This is achieved with circular shift operation on a subset of the output samples resulting from the decomposition in these FFT algorithms and a ...

Success of endodontic treatment depends on the proper identi-fication of all the canals, thorough chemomechanical preparation followed by three-dimensional obturation with hermetic seal. Failure of any of these steps may occur due to unusual tooth morphology. Usually mandibular molars have two roots with three canals but in few teeth, the number of roots and canals vary. The variation in the nu...