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3rd IEEE International Conference on Computational Intelligence and Communication Technology (CICT)

作者： Rai, Shalini Dwivedi, C. K. Srivastava, Rajeev Univ Allahabad Dept Elect & Commun Allahabad Uttar Pradesh India

ISBN: (纸本)9781509062188

Coordinate Rotation Digital Computer (cordic) algorithm is very useful algorithm for the designing of low cost and efficient VLSI circuit's at large scale. It may be suitable for the generation of trigonometric functions, multiplication of complex numbers, matrix inversion and finding the solution of linear equations. The cordic algorithm has also been employed in calculation of sine and cosine values. The sine & cosine values are used in various transform of Digital Signal processing like z transform and in communication system. There are different ways to generate the sin & cosine values. These conventional methods require a huge memory space. A good quantization level is required for large memory. So cordic algorithm based sine & cosine waves' generation has been used because its flexibility characteristics and low quantization error. In this paper some pipelined cordic structures are presented for generation of sine and cosine values, multiplication, division of two numbers and finding out square root or arctangent values. These structures have been implemented and results observed by using simulink of MATLAB.

关键词： cordic algorithms trigonometric functions pipelined cordic architecture

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DESIGN OF A CAM-BASED COLLISION DETECTION VLSI PROCESSOR FOR ROBOTICS

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IEICE TRANSACTIONS ON ELECTRONICS 1994年第7期E77C卷 1108-1115页

作者： HARIYAMA, M KAMEYAMA, M Tohoku Univ Sendai-shi Japan

Real-time collision detection is one of the most important intelligent processings in robotics. In collision detection, a large storage capacity is usually required to store the 3-dimensional information on the obstacles located in a workspace. Moreover, high-computational power is essential in not only coordinate transformation but also matching operation. In the proposed collision detection VLSI processor, the matching operation is drastically accelerated by using a content-addressable memory (CAM). A new obstacle representation based on a union of rectangular solids is also used to reduce the obstacle memory capacity, so that the collision detection can be performed by only magnitude comparison in parallel. Parallel architecture using several identical processor elements (PEs) is employed to perform the coordinate transformation at high speed, and each PE performs coordinate transformation at high speed based on the COordinate Rotation DIgital Computation (cordic) algorithms. When the 16 PEs and 144-kb CAM are used, the performance is evaluated to be 90 ms.

关键词： SPECIAL-PURPOSE VLSI CONTENT-ADDRESSABLE EMORY (CAM) RECTANGULAR SOLID REPRESENTATION cordic algorithms

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A Novel Diagnosis Method for a Hall Plates-Based Rotary Encoder with a Magnetic Concentrator

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SENSORS 2014年第8期14卷 13980-13998页

作者： Meng, Bumin Wang, Yaonan Sun, Wei Yuan, Xiaofang Hunan Univ Coll Elect & Informat Engn Changsha 410082 Hunan Peoples R China

In the last few years, rotary encoders based on two-dimensional complementary metal oxide semiconductors (CMOS) Hall plates with a magnetic concentrator have been developed to measure contactless absolute angle. There are various error factors influencing the measuring accuracy, which are difficult to locate after the assembly of encoder. In this paper, a model-based rapid diagnosis method is presented. Based on an analysis of the error mechanism, an error model is built to compare minimum residual angle error and to quantify the error factors. Additionally, a modified particle swarm optimization (PSO) algorithm is used to reduce the calculated amount. The simulation and experimental results show that this diagnosis method is feasible to quantify the causes of the error and to reduce iteration significantly.

关键词： rotary encoder Hall sensor model-based diagnosis cordic algorithms particle swarm optimization

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inAspect: interfacing Java and VSIPL applications

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CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE 2005年第7-8期17卷 919-940页

作者： Alford, T Shah, VP Skjellum, A Younan, NH Taylor, CD MPI Software Technol Inc Starkville MS 39759 USA Mississippi State Univ Dept Elect & Comp Engn Mississippi State MS 39762 USA Univ Alabama Dept Comp Informat Sci Birmingham AL 35294 USA

In this paper, we discuss the origin, design, performance, and directions of the inAspect high-performance signal- and image-processing package for Java. The Vector Signal and Image Processing Library (VSIPL) community provides a standardized application programmer interface (API) for high-performance signal and image processing plus linear algebra with a C emphasis and object-based design framework. Java programmers need high-performance and/or portable APIs for this broad base of functionality as well. inAspect addresses PDAs, embedded Java boards, workstations, and servers, with emphasis on embedded systems at present. Efforts include supporting integer precisions and utilizing coordinate rotation digital computer (cordic) algorithms-both aimed at added relevance for limited-performance environments, such as present-day PDAs. Copyright (c) 2005 John Wiley & Sons, Ltd.

关键词： high-performance signal processing embedded Java fixed-point arithmetic Java Native Interface VSIPL cordic algorithms

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FPGA application of digital intermediate frequency processing

FPGA application of digital intermediate frequency processin...

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Conference on Asia-Pacific Optical and Wireless Communication (APOC 2002)

作者： Qian, H Li, LY Liu, YL Ctr China Normal Univ Dept Phys Wuhan Peoples R China

ISBN: (纸本)0819447005

Digital IF is the current solution of software radio terminal. Digital IF expands the digital signal processing towards the IF section of terminal. It requires the "softly" reconfigurable IF hardware platform, thereby operating the different mobile standards on the given terminal. Due to the high reconfiguration of FPGA, it is the very approach to digital IF. Starting with considerations of the digital IF, we discuss the implementation of digital IF on FPGA.

关键词： digital IF channelization sample rate conversion cordic algorithms extend CIC

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Servo 2004 09

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2016年

Servo 2004 09 by published by

关键词： casting controller circuit cordic algorithms data electronic controller mold mold making nma rotary nma switch power supply robot robotics robots sensor sensors serial serial data servo servo controller

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Design and Implementation of Different Types of Window Functions Based on FPGA 22

Design and Implementation of Different Types of Window Funct...

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Proceedings of the 2022 5th International Conference on Artificial Intelligence and Pattern Recognition

作者： Jiaqi Xue Dongming Xu Wei Yang Electrical & Information Engineering Xi'an University of Posts and Telecommunications China

ISBN: (纸本)9781450396899

In practical engineering design, we often need to carry out spectral analysis of the digital signal, which requires the use of Fourier transform, and it is defined as the spectral analysis of infinite long continuous time-domain signal. Because the computer cannot process and analyze the infinite time signal, it can only calculate the discrete signal of a limited number of points, so it needs to truncate the input signal of system. However, the truncation of signal will cause spectral leakage, resulting in incorrect spectral analysis of the signal. Although the spectral leakage cannot be completely eliminated theoretically, the window function method can suppress its influence. By adding different window functions to the signal, the spectral leakage can be greatly reduced, but the degree of reduction is different. This paper mainly studies the type of different window functions, and the algorithm principle and implementation of window function is realized by using cordic algorithm was proposed, by using field programmable logic gate array (FPGA) to complete the real-time signal processing, gives a specific design and implementation, and finished the system function simulation on Vivado platform under Xlinx. The results of MATLAB simulation and system function simulation are compared to verify the feasibility of the design scheme.

关键词： cordic algorithms FPGA MATLAB Window functions

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