dft in dsp

(i) OverviewThe baseband digital processing function and the basic peripheral function of the handset are all concentrated on the monolithic system (SOC). The basic architecture of the microprocessor + Digital signal processor (DSP) structure, microprocessor and DSP processing capacity has been enhanced. The microprocessor is the control center of the whole chip. Executes a real-time embedded operating syst

A Fast Ethernet Communication System Platform Based on 12301.6 [Date: 2008-7-22] Source: Today's electronics/21ic Author: Hunan Institute of Technology Yi Jie [Font: large, medium, and small] 　 Introduction With the increasing popularity of Internet applications, the degree of information sharing is constantly increasing. The digitalization and network of embedded devices have become an inevitable trend. Currently, mainstream embedded operating systems on the market include

Introduction Bluetooth technology is a wireless data and voice communication of the open global norms, is used to replace mobile devices or fixed electronic devices to connect cables between the proximity of the Wireless Link, Bluetooth work in the global 2.4GHz Band, data rate of 1mb/s, using the time Division duplex transmission technology to achieve full duplex transmission. As a short distance wireless communication technology that replaces the data cable, Bluetooth supports point-to-point

This article is translated from TI's Handbook, the Handbook is a study of gpp+dsp development of the Golden Code document, I hope that the introduction of the help, there is an inappropriate understanding of the hope please enlighten.Codec Engine Application Developer User ' s Guide.pdf (literature number:sprue67d)"Codec Engine Application Development Manual" http://blog.csdn.net/dyzok88/article/details/42154487Chapter One Codec Engine Overview http:/

data to the device using the write system call, and all other operations that do not conform to the basic pattern of read/write can be done by the IOCTL system call, and finally, using the close system call to tell the Linux kernel no further processing of the device. Open System callThe system calls open to gain access to the sound card, as well as to prepare for subsequent system calls, the function prototype is as follows:int open (const char *pathname, int flags, int mode);The parameter

project maintained by volunteers, while OSS is a commercial product provided by the company, so the degree of adaptation to the hardware is better than ALSA, and it can support more types of sound cards. Alsa, although not as widely used as OSS, but has a more friendly programming interface, and fully compatible with OSS, is undoubtedly a better choice for application programmers.Third, Linux OSS audio device driver3.1 OSS-driven componentsThe OSS standard has 2 most basic audio Devices:mixer(m

By Jia Jia's "complex transformation function and integral transform" for two days, finally understand how the Fourier transform is the same thing. But to achieve fast Fourier transform but do not need to understand so many things, see the "Introduction to the algorithm" in the 30th chapter "polynomial and Fast Fourier transform" on it. However, the introduction of algorithmic introduction and the standard of a little different, that is, the rotation factor is just the reverse, but still equival

by the window function to obtain the waveform after the window addition. The formula is If we simply divide the voice signal into many small segments, these segments (frames) are rectangular windows, and the edge of the rectangular windows is steep, that is, they are not continuous. Therefore, we should select the continuous window function at the edge, so that two adjacent frames can be smoothly transitioned. In speech processing, a conical window is usually used to replace a rectangular windo

Chip design This business, from the big aspect, mainly divided into analog and digital two chunks, and each large and sub-front and back end, I think most of the students on this is definitely very clear, the following on the digital circuit chat chip design Some things, is the chip design has what to do, this is not a complete system introduction, Just a personal understanding and summary, I hope, may not be comprehensive, not correct, welcome students to correct and add to the digital chip, ca

, and higher performance than Spartan-2. Xilinx also provides IP cores including memory controller, System interface, DSP, communication and network, and can run CPU soft core, which has some support for DSP. Its main features are as follows: The 0.15 process, the density of 15552 logic units, the maximum system clock can reach 200MHz, the gate number is 600,000 doors, up to 4 time-delay phase-locked loop;

is better than ALSA in terms of hardware adaptation, and it supports more sound card categories. Although ALSA is not widely used as OSS, it has more friendly programming interfaces and is fully compatible with OSS. It is undoubtedly a better choice for application programmers. Iii. Linux OSS audio device driver 3.1 composition of OSS driver The OSS standard has two basic audio devices: mixer and DSP ). In the sound card hardware circuit, mixer is a

directio: The SRIO Directio transfer class is similar to a memcopy transfer between the SRIO devices. One of the devices is the master, that initiates the transfer. The second Deviceis the slave that responds to the Masters requests. The slave device application normallydoes not become aware of the access (accessed by the Salve DSP does not know that the Master DSP was initiated through Srio). The master mu

The rise of the network and the development of the communication technology of Apsara stack have been accompanied by the development of the software radio ideology and technology. Among them, it is worth noting the content of protocol stack development. In modern digital communication systems, DSP and other digital signal processors are increasingly used in combination with high-speed AD and DA Converters for the modulation and demodulation of physica

following image: 2, camera internal decomposition camera hardware structure: (1), working principle Light through the lens lens into the inside of the camera, and then through the IR filter to filter the infrared light, finally to sensor (sensors), Senor is divided into according to the material can be divided into CMOS and CCD two kinds, the optical signal can be converted to electrical signals, The internal ADC circuit is then converted to a digital signal, and then transmitted to

Links:http://blog.csdn.net/zwlforever/archive/2008/03/14/2183049.aspxA good FFT article, a collection of a bit.The positive and inverse transformations of DFT are (1) and (2) respectively. Assuming that there are n data, then the calculation of a frequency point requires N-times complex multiplication and N-1 complex addition, the entire DFT requires n*n complex multiplication and n (N-1) complex addition;

and authenticated IPs in the library.The Design Ware Library contains basic, integrated building blocks that are necessary for designing a chip. Data path units, such as highly optimized adders and multipliers, are the primary components of the DesignWare library, and the Synopsys company has made significant improvements in the timing and area of circuit design. Since last year, the Design Ware Library has been expanded to include a large number of function blocks, including memory, controller

, Ice ice and sister Feng is a filter! (This is, no such filter, do not imitate 0.0)Our basic principle is that the high frequency corresponds to the steep part of the change, and the low frequency corresponds to the slow part. Low frequency and high frequency in the frequency domain with digital measurement, filter on the frequency domain of the number of different degrees of enhancement or suppression, after the inverse transformation, to obtain the desired image, the frequency domain filter m

Written in the previous on the FFT algorithm personal thought more important derivation, detailed introduction can refer to the FFT algorithm study notesV[n] is a real sequence of 2N in length, and V[k] represents the 2N point DFT of the real sequence. Defines two real sequences with a length of n g[n] and H[n] asG[N]=V[2N], h[n]=v[2n+1], 0The following deduction can be madeThe FFT algorithm used here can achieve O (nlogn) complexity of the discrete F

bus is mainly used as external memory interface, such as Texas Instruments (TI) C6000 series DSP external memory interface, can support external synchronization SDRAM, Sbsram and FIFO, but also support asynchronous SRAM, Flash and so on. The external memory interface can also be used for interconnection with an in-board FPGA or ASIC chip, in which case the FPGA or ASIC simulates a DSP-supported memory inte

Circuit design and PCB fabrication, often encounter power symbols: VCC, VDD, VEE, VSS, what kind of relationship do they have? First, explain Vcc:c=circuit denotes the meaning of the circuit, i.e. the voltage of the access circuit Vdd:d=device indicates the meaning of the device, that is, the operating voltage inside the device; Vss:s=series indicates the meaning of a public connection, usually referred to as the circuit common ground terminal voltage Ii. description 1, for the digital circuit,