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DDS-baseddesignofthesinusoidalsignalgenerator
- 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 singl
SimplestatisticsshowthattheexchangeofMillivoltmete
- 本系统分电压测量和信号产生输出两大部分，电压测量部分以模拟电路为主，配合放大模块、A/D转化模块、显示模块；通过凌阳单片机进行数据处理，在误差允许范围内显示测量电压值。信号产生以直接数字式频率合成器(Direct Digital Frequency Synthesis,简称DDS或DDFS)为核心，经过AT89S52对DDS芯片内部进行控制，使之输出标准正弦波形，利用编程实现频率预置、步进，达到电压输出频率的可调节步进。通过调试与测量完成了题目的基本部分和全部发挥部分的要求并有自己的创新-Thi
ad9912
- AD9912: 1 GSPS Direct Digital Synthesizer with 14-Bit DAC. IBIS model. The AD9912 is a direct digital synthesizer (DDS) featuring an integrated 14-bit DAC. The AD9912 features a 48-bit frequency tuning word (FTW), which can synthesize frequenci
2345
- 实用的步进电机驱动电路 利用LM331、PMM8713 和SI － 7300A 设计了四相步进电 机驱动电路，该驱动电路具有工作可靠、效率高、矩频特性好 的特点，并应用于数控等离子弧压自动调高系统中-Practical step motor drive circuit Using LM331, PMM8713, and SI- 7300A designed four-phase stepping motor Machine drive circuit, the d
Coriolis
- 数字驱动由于其控制算法的灵活性可以有效地提高科氏质量流量计的工作性能。针对数字驱动的启振问题，本文基于模型分析和实验仿真，提出了正负阶跃交替激励启振方法。该方法通过跟踪检测传感器自激输出信号相位进行正负阶跃交替激励，使流量管的振动幅值持续、可靠地快速增大，进而结合非线性幅值控制算法和频率估计，可使流量管启振时间大幅度地缩短，克服了传统启振方法的局限性。-Digital drive control algorithm because of its flexibility can improve t
DTMFGenerator
- 量化DTMF的高频群和低频群正弦信号的XSW步长-DTMF high frequency group and quantify low-frequency sinusoidal signal XSW group step
PLL_12864
- mb1504的频率合成器及12864显示当前频率值，步进25k。-mb1504 the frequency synthesizer and 12864 displays the current frequency value, step 25k.
ghhghgjjhjhj
- 步进电机是将电脉冲信号转变为角位移或线位移的开环控制元件。在非超载的情况下，电机的转速、停止的位置只取决于脉冲信号的频率和脉冲数，而不受负载变化的影响，即给电机加一个脉冲信号，电机则转过一个步距角-Stepper motor is the electric pulse signal into angular displacement or linear displacement of the open-loop control components. In the case of non-ove
OFDM-FPGA
- 频率同步是宽带OFDM系统中的关键技术，IEEE 802.11a 采用OFDM技术，利用其前导序列的重复结构，提出了一种分步的粗细频偏捕获与校正算法，同时为了补偿时域同步后的残余相差和适应信道的时变特性，还提出了一种基于频域导频的相位跟踪方案-Frequency synchronization is a key technology in the broadband OFDM systems, IEEE 802.11a uses OFDM technology, the use of the r
LC
- 本系统是以FPGA（EP2C8Q240C8）为控制核心，由压控振荡器、PLL倍频器、高频功率放大器、遥控器及LCD显示模块组成的压控LC振荡器。能实现输出正弦波频率在15MHZ~35MHZ步进可调，其最小步进为5002HZ，频率稳定度为10-5。当输出信号的频率为30MHZ、峰峰值稳定在1V左右时，在+12V单电源工作的情况下，功率放大器能实现在50Ω纯阻性和50Ω+20pf容性负载上输出功率大于20mw。LCD显示模块能实时显示输出信号的峰峰值和频率，精度由于10 。-This system
AssignmentSharp5
- A battery of 100V dc is to feed an inductive load (R = 10 ohms, L = 100 mH) with a variable dc supply from 10 - 100 V by means of a step-down converter (dc chopper) operating at a fixed switching frequency of 100 Hz. The dc chopper is composed of an
LabVIEW-paper
- 09年上交大的硕士论文 本论文作者在对风电场监控系统进行实际调研后，以美国 GE 公司的1.5MW 变速变桨距双馈异步风力发电机组为例做为被监测对象，应用 美国国家仪器公司 NI（National Instruments Corporation）虚拟仪器技术 和 LabVIEW8.5 作为软件平台，尝试开发大型风力发电机组旋转机械状 态监测系统，并根据风力发电机组和风电场远程监控的特征，对监测系 统的通信方式进行分析比较后，选择通信方案。监测系统的目的是对采 集的振动信号
Data_Logge1814411142004
- (Refer to DataLogger 2 for newest version) - I wrote this program to monitor the input of an RS232 Serial Port and graphically log all activity. It acts and operates just like a Digital Storage Oscilloscope, capable of logging up to 5 hours in one fi
Audio Processing using Matlab
- Audio processing is the intentional alteration of auditory signals. The major application area of the audio processing is in the field of music. One of the practical examples that demonstrate audio processing is audio mastering processor for audio co
SCHEDULING-SCHEMES-FOR-THROUGHPUT-OPTIMIZATION-IN
- This thesis presents a scheme for scheduling of wireless adhoc networks by using directional antennas using the concept of frequency reuse. The idea of wireless adhoc network communication is taken one step further by adding directional antennas for
Implementing-FM-in-GNU-radio
- step wise implementation of Frequency modulation in open source GNU radio software (gnu radio companion files and python files)
AD9850
- 基于AD9850设计一个高频信号源四按键控制步进频率现实中在1602屏幕上-Design a high frequency signal source based on AD9850 four buttons control step frequency in reality on the screen in 1602
CFO-UFMC
- 本论文中，一个混合载波频率偏移估计方案用于基于通用滤波多载波的系统。 此方案所述CFO估计器基于最小平方（LS）准则首先导出以获得粗略频率偏移估计使用大频率搜索步骤。 接着，通过其精确估计残留频率偏移自相关操作补偿。 该算法具有较大估计的特点范围以及更高的估计精度。-In this letter, a robust hybrid carrier frequency offset (CFO) estimation scheme based on training symbols is devi
06 PPT_SFR_Intro_Mazzaro
- 讲解步进频率信号的经典PPT，介绍了步进频率雷达，信号处理方法，雷达参数设计准则等(Introduction to stepped frequency radar. include high range resolution radar , step-frequency radar architecture, transmission, data capture, processing method and radar design parameters)
Resource Allocation with Frequency Reuse using MATLAB
- This article starts with a brief background on the problem of resource allocation. A literature review is included for readers interested in further reading on the topic. The utilities used in the MATLAB code for the resource allocation with frequenc