Description: 直接数字频率合成技术在通信领域的应用,尤其在雷达导航上发挥了极大作用.-direct digital frequency synthesis technology in the field of communications applications, particularly in the radar navigation played a very important role. Platform: |
Size: 238485 |
Author:电信科学 |
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Description: 基于可编程逻辑器件CPLD和直接数字频率合成技术（DDS）的三相多波形函数发生器-based CPLD and direct digital frequency synthesis (DDS) over the three-phase waveforms letter Number Generator Platform: |
Size: 92729 |
Author:liujl |
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Description: 2006altera大赛－基于软核Nios的宽谱正弦信号发生器设计：摘要：本设计运用了基于 Nios II 嵌入式处理器的 SOPC 技术。系统以 ALTERA公司的 Cyclone 系列 FPGA 为数字平台，将微处理器、总线、数字频率合成器、存储器和 I/O 接口等硬件设备集中在一片 FPGA 上，利用直接数字频率合成技术、数字调制技术实现所要求波形的产生，用 FPGA 中的 ROM 储存 DDS 所需的波形表，充分利用片上资源，提高了系统的精确度、稳定性和抗干扰性能。使用新的数字信号处理（DSP）技术，通过在 Nios 中软件编程解决
不同的调制方式的实现和选择。系统频率实现 1Hz～20MHz 可调，步进达到了1Hz；完成了调幅、调频、二进制 PSK、二进制 ASK、二进制 FSK 调制和扫频输出的功能。
-2006altera race-based soft-core Nios wide spectrum of sinusoidal signal generator design : Abstract : The use of design-based Nios II embedded processor SOPC technology. Altera Corporation system to the Cyclone FPGA series of digital platform, microprocessor, bus, Digital Frequency Synthesizer, memory and I / O interface hardware concentrated in an FPGA, the use of direct digital frequency synthesis technology and digital modulation waveforms required to achieve the rise, Using FPGA ROM storage of the DDS waveform table, and make full use of on-chip resources, improve the system's accuracy, stability and robustness. Use of new digital signal processing (DSP) technology, Nios through software programming to solve different ways of achieving modulation and choice. Realize the system freq Platform: |
Size: 407706 |
Author:刘斐 |
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Description: FPGA上的VERILOG语言编程。通过查找表实现直接数字频率合成。在主控部分通过键盘选择正弦波，方波，三角波，斜波，以及四种波形的任意两种的叠加，以及四种波形的叠加；通过控制频率控制字C的大小，以控制输出波形频率，实现1Hz的微调；通过地址变换实现波形相位256级可调；通过DAC0832使波形幅值256级可调；通过FPGA内部RAM实现波形存储回放；并实现了每秒100HZ扫频。-FPGA on the verilog language programming. Lookup table through direct digital frequency synthesis. In part through the control of the keyboard to choose sine, square, triangle wave, sloping wave, and four arbitrary waveform two superposed and the stack of four waveform; by controlling the frequency control word on the size, in order to control the output waveform frequency, 1 Hz to achieve the fine-tuning; Address transform through waveform phase adjustable 256; DAC0832 so through waveform amplitude adjustable 256; FPGA through internal RAM to the waveform storage intervals; and achieve a 100 per second sweep 9999. Platform: |
Size: 16232 |
Author:田世坤 |
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Description: DDS(直接数字频率合成器)的整个工程文件,已在板子上运行通过,实现了正弦波、方波、三角波的调幅、调频，尚未实现调相，希望有志同道合者可一同完善！-DDS (direct digital frequency synthesis), the whole project documents, the board has been run through, achieved a sine, square, triangle wave amplitude, frequency, phase modulation has not been achieved and that there will be together like-minded perfect! Platform: |
Size: 16244030 |
Author:张菲 |
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Description: EDA实验本科论文，对学习电子工程专业的学生有很大帮助，是关于直接数字频率合成器的-EDA experimental undergraduate thesis on the study of electronic engineering students to be of great help. of direct digital frequency synthesis of Platform: |
Size: 604548 |
Author:王琨 |
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Description: 本程序功能:
DDS文件夹内的程序，完成直接数字频率合成功能,有正弦,三角,方波三种波形,并能扫频.
可通过键盘操作设置频率参数和选择波形种类和控制运行.
由两部分组成,\"C\"文件夹内,是用于在 51 单片机上运行的 C语言程序, \"Verilog\"文件夹内,是用Verilog语言编写的 FPGA 程序.-this program functions : DDS folder procedures, complete direct digital frequency synthesis, sine, triangle, Three square waveform, and can sweep. can be set up through the keyboard operation frequency waveform parameters and the types of choice and control operations. composed of two parts, "C" folder, for the 51 microcontroller running C Programming Language, "Verilog" folder, use the Verilog language FPGA procedures. Platform: |
Size: 1027313 |
Author:吴健 |
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Description: 摘要：介绍了基于可编程逻辑器件CPLD和直接数字频率合成技术（DDS）的三相多波形函数发生器的基本原理，并在此基础上给出了基于CPLD的各模块设计方法及其VHDL源程序-Abstract : Based on the CPLD and direct digital frequency synthesis (DDS) of a three-phase multi-function waveform Generator to the basic principles and on this basis given the CPLD based on the module design and VHDL source Platform: |
Size: 47722 |
Author:陈鑫 |
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Description: 介绍了直接数字频率合成器DDS(Direct Digital Synthesizer)的组成、工作原理及性能
-introduced a direct digital frequency synthesis DDS (Direct Digital Synthes izer) the composition, theory and performance Platform: |
Size: 56396 |
Author:1 |
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Description: 讲述了dds直接数字频率合成的基本原理，同时用ＶＨＤＬ语言编写dds原代码用于生成正弦波，并在ISE开发平台进行仿真和MATLAB验证正弦波输出结果-described dds direct digital frequency synthesis of the basic tenets addition to the use of VHDL prepared dds source used to produce sine, and ISE development platform for simulation and verification MATLAB sine wave output Platform: |
Size: 491278 |
Author:czy |
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Description: 讲述了dds直接数字频率合成的基本原理，同时用ＶＨＤＬ语言编写dds原代码用于生成正弦波，并在ISE开发平台进行仿真和MATLAB验证正弦波输出结果-described dds direct digital frequency synthesis of the basic tenets addition to the use of VHDL prepared dds source used to produce sine, and ISE development platform for simulation and verification MATLAB sine wave output Platform: |
Size: 491520 |
Author:czy |
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Description: 直接数字频率合成技术在通信领域的应用,尤其在雷达导航上发挥了极大作用.-direct digital frequency synthesis technology in the field of communications applications, particularly in the radar navigation played a very important role. Platform: |
Size: 238592 |
Author:电信科学 |
Hits:
Description: 基于可编程逻辑器件CPLD和直接数字频率合成技术（DDS）的三相多波形函数发生器-based CPLD and direct digital frequency synthesis (DDS) over the three-phase waveforms letter Number Generator Platform: |
Size: 92160 |
Author:liujl |
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Description: 2006altera大赛－基于软核Nios的宽谱正弦信号发生器设计：摘要：本设计运用了基于 Nios II 嵌入式处理器的 SOPC 技术。系统以 ALTERA公司的 Cyclone 系列 FPGA 为数字平台，将微处理器、总线、数字频率合成器、存储器和 I/O 接口等硬件设备集中在一片 FPGA 上，利用直接数字频率合成技术、数字调制技术实现所要求波形的产生，用 FPGA 中的 ROM 储存 DDS 所需的波形表，充分利用片上资源，提高了系统的精确度、稳定性和抗干扰性能。使用新的数字信号处理（DSP）技术，通过在 Nios 中软件编程解决
不同的调制方式的实现和选择。系统频率实现 1Hz～20MHz 可调，步进达到了1Hz；完成了调幅、调频、二进制 PSK、二进制 ASK、二进制 FSK 调制和扫频输出的功能。
-2006altera race-based soft-core Nios wide spectrum of sinusoidal signal generator design : Abstract : The use of design-based Nios II embedded processor SOPC technology. Altera Corporation system to the Cyclone FPGA series of digital platform, microprocessor, bus, Digital Frequency Synthesizer, memory and I/O interface hardware concentrated in an FPGA, the use of direct digital frequency synthesis technology and digital modulation waveforms required to achieve the rise, Using FPGA ROM storage of the DDS waveform table, and make full use of on-chip resources, improve the system's accuracy, stability and robustness. Use of new digital signal processing (DSP) technology, Nios through software programming to solve different ways of achieving modulation and choice. Realize the system freq Platform: |
Size: 407552 |
Author:刘斐 |
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Description: 基于ＦＰＧＡ平台，实现了直接数字频率合成。-FPGA-based platform, to achieve a direct digital frequency synthesis. Platform: |
Size: 827392 |
Author:liqijun |
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Description: 直接数字频率合成器，基于vhdl语言，在qartus II上实现，下载调试成功-Direct digital frequency synthesizer, based on the VHDL language, in qartus II achieved a successful download debugging Platform: |
Size: 316416 |
Author:浮云 |
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Description: 本设计采用AT89552单片机，辅以必要的模拟电路，实现了一个基于直接数字频率合成技术(DDS)的正弦谊号发生器。设计中采用DDS芯片AD9850产生频率1KHZ~10MHZ范围内正弦波，采用功放AD811控制输出电压幅度， 由单片机AT89S52控制调节步进频率1HZ。在此基础上，用模拟乘法器MC1496实现了正弦调制信号频率为1KHZ的模拟相度调制信号；用FPGA芯片产生二进制NRZ码,与AD9850结合实现相移键控PSK、幅移键控ASK、频移镇键FSK。-AT89552 the single-chip design, supplemented by the necessary analog circuits, based on the realization of a direct digital frequency synthesis (DDS) generator of sinusoidal No. Friends. The design of DDS chip AD9850 produced using 1KHZ ~ 10MHZ frequency range of sine wave, the AD811 control amplifier output voltage range of from single-chip AT89S52-conditioning step frequency control 1HZ. On this basis, the use of analog multiplier MC1496 has sinusoidal frequency modulation signal 1KHZ degree analog phase modulated signal generated by FPGA chip NRZ binary code, combined with the AD9850 to achieve phase shift keying PSK, ASK ASK, frequency Shift key town of FSK. Platform: |
Size: 208896 |
Author:何蓓 |
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Description: 基于spartan-3e开发板的dds，包括串行通信的dac代码-direct digital frequency synthesis based on spartan-3e kitboard Platform: |
Size: 1866752 |
Author:chjin |
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Description: 本文主要介绍的是采用直接数字频率合成的短波信号发生器，它主要以微电脑控制部分、直接数字频率合成（DDS）部分、数字锁相环频率合成部分、背光液晶显示部分、功率放大部分等组成。该软件系统采用菜单形式进行操作，操作方便明了，增加了很多功能。它通过启动DDS后，把内存缓存区的数据送到DDS后输出相应的频率，并把数据转换为BCD码，送到液晶显示器进行显示。该系统输出稳定度、精度极高，适用于当代的尖端的通信系统和精密的高精度仪器。-This paper describes the use of direct digital frequency synthesis of short-wave signal generator, which is part of a micro-computer control, Direct Digital Synthesis (DDS) of the digital part of PLL frequency synthesizer, backlit liquid crystal display of the power amplifier, etc. composition. The menu system uses the form of software to operate, easy to operate and clear, increase in the number of features. DDS through start after the memory cache after the data to the DDS output corresponding frequency, and the data is converted to BCD code to the LCD display. The output of the system stability, high precision for cutting-edge contemporary and sophisticated communication systems high-precision instruments Platform: |
Size: 466944 |
Author:xiang |
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