dft in dsp

Label: MATLAB spectrum leakage DFT Window FunctionAs mentioned in the previous article, the sequence length can be increased by adding zeros, so that the final increase of N can be used to increase the video resolution. However, it cannot solve the problem of frequency leakage. The root cause of frequency leakage is the selection of windows.Due to the abrupt truncation of the rectangular window, the relatively large amplitude of the spectral Side Lobe

1. Realization of Matlab with discrete Fourier transform The Matlab function FFT, fft2 and fftn can implement one-dimensional, two-and N-dimensional DFT algorithms respectively, while functions Ifft, ifft2 and ifftn are used to calculate the inverse DFT. These functions are called in the following format: A=fft (X,n,dim) where x represents the input image, n represents the sampling interval, and if x is les

Code:x = [1, 1, 1, 1, zeros (1,4)]; N = 8; % zero-padding Operation x_dft = DFT (x,n); % DFT of x (n) magx_dft = ABS (X_DFT) phax_dft = Angle (x_dft) *180/pi% DEGREESREALX_DFT = Real (X_DFT); IMAGX_DFT = Imag (X_DFT); angx_dft = angle (X_DFT); % RADIASN = 0: (N-1); k = 0:1000;

How to Build da Vinci DSP Server Author: Cui Jing, Ti General DSP Technology Application Engineer Texas Instrument's DaVinci digital media technology platform consists of four parts: chips (processors), development tools or Development kits, software and technical support. Software development involves operating systems, audio/video coding/DecodingAlgorithmAnd the division of labor between ARM

Texas Instruments (TI) 's Leonardo da Vinci (DaVinci) Digital media technology platform includes four major parts: chips (processors), development tools or development kits, software and technical support. Software development involves the operating system, audio and video codec algorithm and arm and DSP between the division of cooperation, so that many engineers feel more complex. TI introduced a series of software modules and tools to establish the

1. What is a DSP?I'm used to understanding any one technology from two angles 1. It solves what problem 2. For whom it serves. For DSP, I think DSP is to solve the problem of the complexity and ROI of the programmatic purchase of advertisers, which is born to advertisers. If the advertising industry is simplified into: media (supply), advertising platform (ADX) a

Address: http://www.analogcn.com/Article/wz3/201112/20111207164354.html 1. Find out the source and familiar manual of DSP-related resources Generally, this is mainly from the official website of DSP chip manufacturers. Although the current DSP chip manufacturers provide Chinese official websites, I suggest you use an English website, some resources are not avail

This paper introduces the debugging method of DSP Application Based on MATLAB based on specific examples. MATLAB has powerful analysis, computing and visualization functions, using dozens of professional toolboxes provided by MATLAB, algorithm Analysis and Simulation for automatic control, signal processing, and communication systems can be conveniently and flexibly implemented. It is an indispensable software tool for algorithm designers and engineer

Reprint: http://www.ipinyou.com.cn/UI/technicalnews/201203/dsp_0.html Now, you have to ask what the hottest topics are in China's online advertising field. Someone will tell you that DSP definitely belongs to one of the hotspots. DSP in China, the upsurge seems to be growing, many domestic advertising companies have claimed to have advanced DSP, the entire Inter

Hardware Design of Image Processing Platform Based on PCI Bus and DSP chip [Date:] Source: Electronic Technology Application Author: Kong Xianggang, Zhu Jing [Font:Large Medium Small] 　 With the rapid development of computer, multimedia and data communication technologies, digital image technology has gained great attention and development in recent years, it has been widely used in scientific research, industrial production, medi

DSP-based data scheduling strategy for image rotation Algorithms [Date:] Source: Electronic Technology Application Author: Li Linlin, Feng Yan, He Yizheng [Font:Large Medium Small] 　 Image rotation is a widely used digital image processing technology. With the increasing application level, the demand for high-resolution and large image rotation in embedded systems is also increasing. For example, in the display and processing of h

How does one mix 1.5 V/3.3v?The development of TI DSPs is the same as that of Integrated Circuits. The new DSPs are all 3.3v, but many peripheral circuits are still 5 V. Therefore, in the DSP system, there are often 5 V and 3 v dsp mixed connection problems. In these systems, Note: 1) the DSP outputs to a 5 V circuit (such as D/A), which can be directly connected

technical training and marketing, so I also needed to study mcf52x.This processor is mainly used for control. Its biggest characteristic is its cost advantage. Don't look at the price of this chip as if it is not high, but its internal SDRAM and flash, it is fully qualified for the small and compact RTOS operation requirements, making the cost of a low-end product very cost-effective.Currently, ColdFire has four series V1/2/3/4 high-end V3/v4, which are rarely seen in domestic applications.At p

Software and Hardware Design and Implementation of DSP-based Internet Access Solution [Date:] Source: Electronic Technology Application by fan Qing Han Chong Zhao Wei Hua [Font:Large Medium Small] 　 With the development of modern network technology, embedded systems, such as single-chip microcomputer and DSP, require more and more access networks, for example, an electric meter system w

TI-based DSP chip application program is divided into two kinds: general application; Dsp/bios application.To simplify programming, TI provides a programming interface for C, which encapsulates all of TI's hardware modules in the form of APIs and macros, collectively known as Dsp/bios. The Dsp/bios contains the followi

Still remember when reading, the teacher said that single-chip computer, ARM, DSP has interoperability, are CPU, but listen to the teacher can not understand.How can I understand them and find out their similarities and differences? Let's take a look at my wife's views:Icer, SOC design for arm CPUsLet me say a few words, hoping to say a little thinner.First of all, said CPU, central processing unit, the essence is an integrated circuit, the function i

Design of DSP-based embedded micro-image processing system [Date:] Source: Electronic Technology Application Author: Zhang huaizhu Yin Chuan Li Song Jianzhong Qiao Shuang [Font:Large Medium Small] 　 Micro-image processing is an important field of digital image processing. With the continuous development of its technology, it has been widely used in materials, biology, medicine, and other fields [1] [2]. Currently, micro-image proc

Algorithm Efficient DSP system development with standard implementation Author: Steve blonstein, Technical Director-Software Development System As the application of digital signal processor (DSP) expands, the demand for component-oriented software modules continues to grow. The ready-made algorithms provided by third parties can respond to the above requirements at the basic level. Third-party algori

Graduate student during the TI DSP research, from a to the embedded point does not know the novice to the completion of a self-satisfied project, which has traversed a lot of detours, now put my knowledge of DSP learning and some references listed, may be helpful for beginners.Laboratory is a smell pavilion DM642 Development Board, at that time this development Board is relatively new, the domestic Chinese

Reprinted from: http://bbs.21ic.com/icview-841266-1-1.htmlIn the application of DSP, in fact, hardware is generally not a problem, the main is the software, is the algorithm! The following about the operation of the essence of DSP hope that some value!A DSP fixed-point arithmetic operation1-Count CalibrationIn the fixed-point