CORDIC is generally faster than other approaches when a hardware multiplier (e.g., a microcontroller) is not available, or when the number of gates required to implement the functions it supports should be minimized (e.g., in an FPGA). On the other hand, when a hardware multiplier is available (e.g., in a DSP microprocessor), table-lookup methods and power series are generally faster than CORDI...

This paper presents a novel CORDIC-based approach for computing arcsine and arccosine functions. Previous approaches based on CORDIC either calculate double iterations, which increases the complexity of stages, or have high approximation error. By contrast, proposed compensation gain in rotations that allows an accurate computation does not increase stages. The has been implemented FPGA to demo...

Vector rotation is the key operation employed extensively in many digital signal processing applications. In this paper, we introduce a new design concept called Angle Quantization (AQ). It can be used as a design index for vector rotational operation, where the rotational angle is known in advance. Based on the AQ process, we establish a unified design framework for cost-effective low-latency ...

The COordinate Rotation DIgital Computer CORDIC algorithm has proved its versatility in computing various transcendental functions by only using the shift and adds operations. This paper presents a new hardware efficient scaling free CORDIC algorithm to operate in vectoring and in rotation mode. The micro rotation of the vector is always in one direction with no scale factor correction. The Ran...

In recent years, CORDIC algorithms has been used extensively for various image processing system& biomedical applications. By using CORDIC algorithm we can able to reducing the number of iteration to process the image in the system. Low power design is to be challenging process during system operations. Previous approaches scope to minimize the power consumption without image quality considerat...

This paper proposes two optimal Cordic Loeffler based DCT (Discrete Cosine Transform algorithm) architectures: a fast and low Power DCT architecture and a high PSNR DCT architecture. The rotation parameters of CORDIC angles required for these architectures have been calculated using a MATLAB script. This script allows the variation of the angle’s precision from 10−1 to 10−4. The experimental re...

In this paper we describe an efficient CORDIC algorithm that completely eliminates the scaling factor. Besides we have proposed an algorithm to redefine the elementary angles for reducing the number of CORDIC iterations. The Coordinate Rotational Digital Computer (CORDIC) algorithm is another classic approach for sine wave generation. The particular architecture hereby presented generates the p...

This paper presents an improved VLSI (Very Large Scale of Integration) architecture for real-time and high-accuracy computation of trigonometric functions with fixed-point arithmetic, particularly arctangent using CORDIC (Coordinate Rotation Digital Computer) and fast magnitude estimation. The standard CORDIC implementation suffers of a loss of accuracy when the magnitude of the input vector be...