Electrical Department, V.J.T.I. Mumbai Abstract In recent researches, there are countless applications where sine and cosine wave are used, like in Physics, Digital Signal Processing for various transforms, several modulation and demodulation techniques etc. There are numerous ways to generate digital sine and cosine waves, the use of previously calculated tables is one of the choices, but it r...

A very–high radix algorithm and implementation for circular CORDIC in vectoring mode is presented. As for division, to simplify the selection function, the operands are pre–scaled. However, in the CORDIC algorithm the coordinate x varies during the execution so several scalings might be needed; we show that two scalings are sufficient. Moreover, the compensation of the variable scale factor is ...

Recent developments in reconfigurable hardware technologies have offered high-density high-speed devices with the ability for custom computing whilst maintaining the flexibility of a software solution. These features are well suited to image processing algorithms that are computationally intensive and repetitive in nature. Very deep pipelining and parallelism, features often required for real t...

This paper presents a high throughput VLSI architecture for Blackman windowing. Since most of the implementation of windowing functions for real time applications, are based on either ROM or DSP processor. Here the proposed architecture is designed using major blocks like CORDIC(CO-ordinate Rotation DIgital Computer) and Han-Carlson adder. This architecture is flexible in terms of window length...

In this paper a niethodolog! for reclucing the power consumption of shift-and-add operations in general and especially of CORDIC stages is presented. The proposed method uses the fuct of simultaneous c a r p generation in rediiiidarit carp-save and signed digit structures to predict the miriimiini necessap hardware effortfor shift-and-add operations. As a carry once generated in a certain hit p...

In this paper we design a CORDIC architecture for variable–precision, and a new algorithm is proposed to perform the interval sine and cosine functions. This system allows us to specify the precision to perform the sine and cosine functions, and control the accuracy of the result, in such a way that recomputation of inaccurate results can be carried out with higher precision. An important reduc...

In the new digital video broadcasting standard using satellites, denoted as DVB-S2, 16-ary and 32-ary amplitude-phase shift keying APSK are applied as modulation techniques. Optimum decision algorithms for 16-APSK and 32-APSK resulting from Voronoi diagrams demand relatively complicated hardware, typically high-capacity memories for demapping tables. In this paper, the efficient method based on...

Cordic based QRD-MVDR adaptive beamforming algorithms possess desirable properties for VLSI implementation such as regularity and good nite-word length behavior. But this algorithm su ers from speed limitation constraint due to the presence of recursive operations in the algorithm. In this paper, a ne-grain pipelined Cordic based QRD-MVDR adaptive beamforming algorithm is developed using the ma...

This paper presents a new fast Discrete Fourier Transform (DFT) algorithm. By rewriting the DFT, a new algorithm is obtained that uses 2 n?2 (3n?13)+4n?2 real multiplications and 2 n?2 (7n? 29) + 6n + 2 real additions for a real data N = 2 n point DFT, comparable to the number of operations in the Split-Radix method, but with slightly fewer multiply and add operations in total. Because of the o...