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dds正弦发生器代码
- 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 sim
PhaseNoise.rar
- 小数分频技术解决了锁相环频率合成器中的频率分辨率和转换时间的矛盾, 但是却引入了严重的相位噪声, 传统的相位补偿方法由于对Aö D 等数字器件的要求很高并具有滞后性实现难度较大。$2 调制器对噪声具有整形的功 能, 因而将多阶的$2 调制器用于小数分频合成器中可以很好地解决他的相位噪声的问题, 大大促进了小数分频技术的 发展和应用。文章最后给出了在GHz 量级上实现的这种新型小数分频合成器的应用电路, 并测得良好的相噪性能。,Fractional-N technology to s
mtd
- MTD定点浮点仿真,可直接用于fpga算法的仿真程序,产生了扫频信号,仿真直接输出系统频率响应函数,为系统测试带来好处-MTD fixed-point floating-point simulation, fpga algorithm can be used directly in the simulation program to produce a sweep signal, the direct simulation output system frequency response fun
FPGA_NEW_APPROACH_TO_IMPLEMENT_CHAOTIC_GENERATOR.
- In this paper, a new method is introduced to implement chaotic generators based on the Henon map and Lorenz chaotic generators given by the state equations using the Field Programmable Gate Array (FPGA). The aim of this method is to increase the freq
bxfsq
- 用VHDL代码实现的0-40000任意分频,具体分频数可以自己参考进行修改.并用matlab写好各种波形图的MIF文件,然后实现FPGA的一个多功能波形生成器! (平时的课程设计)-Achieved using VHDL code 0-40000 arbitrary frequency, the specific sub-frequency reference can be modified. Matlab written by a variety of waveforms of MIF fil
firfilter
- FIR滤波器:自定滤波器的类型(低通,高通或带通)、设计指标(通带截止频率、通带波纹、阻带截止频率、阻带衰减) 1、根据指标选择合适的窗函数,用窗口设计法设计符合指标的FIR滤波器;并验证其性能是否满足预定指标。 -FIR filters: Custom filter types (low pass, high pass or band-pass), design specifications (passband cutoff frequency, passband ripple, st
xb
- 用汉宁窗设计一个FIR高通数字滤波器,满足以下参数要求:通带边界频率ωp=0.7π,通带内衰减函数αp=0.4dB;阻带边界频率Ωs=0.4π,阻带内衰减函数为αs=55dB。-With the Hanning window design an FIR high-pass digital filter to meet the requirements the following parameters: passband edge frequency ωp = 0.7π, pass-band at
Study_on_Key_Technologies_of_n4-DQPSK_Modulation_a
- 本文首先研究可4一DQPsK调制解调系统中调制部分的基本原理和各个模块的设计方案,重点研究成形滤波器和直接数字频率合成器 (DireetoigitalFrequeneySynihesis,简称DDS),并针对各个关键模块算法进行matlab设计仿真,展示仿真结果。其次,研究调制解调系统解调部分的基本原理和各个模块的设计方案,重点研究差分解调,数字下变频和位同步算法,也针对其各个关键模块进行算法的Matlab设计仿真。然后用Matlab对整个系统进行理论仿真,得出结论。在此基础 上,采用超高速
DDC_matlab
- 实现数字变下频的matlab程序,CIC,HB,FIR滤波器代码都在其中-Realize digital variable frequency under matlab, CIC, HB, FIR filter code in it
lfm_ambi
- 线性调频信号chirp lfm信号的模糊函数 matlab编写 -Linear frequency modulated signal ambiguity function of the signal of the chirp lfm Matlab prepared
plot_f1
- 此程序的功能是对Quartus II软件仿真完成之后,导出的.tbl文件进行matlab画图,画出其时域图和频域图。其中待处理的.tbl文件,我将其进行人工处理,手动删除了无用信息,只剩余时间点、输入信号和输出信号。-The function of this program after the completion of the Quartus II software simulation, export tbl file matlab drawing, draw a diagram of th
FILTER
- 一个工作频率(采样频率)100M的,截止频率10M的FIR滤波器,一共是108阶。 一共四个文件,滤波器的实现文件FILTER.v,测试平台FILTER_TB,matlab生成测试向量,和matlab读取输出数据分析。 经过了测试,是可用的-A working frequency (sampling frequency) 100M, cutoff frequency 10M FIR filter, a total of 108 bands. A total of four documen
AM
- 实验利用matlab 软件实现直接数字频率合成-Experiments using matlab software direct digital frequency synthesis
DDS
- DDS的核心是相位累加器,相位累加器有一个累加器和相位寄存器组成,它的作用是再基准时钟源的作用下进行线性累加,当产生溢出时便完成一个周期,即DDS的一个频率周期。加载Matlab 产生的波形,通过FPGA输出DDS信号-Core DDS is the phase accumulator, a phase accumulator and phase accumulator registers, its role is to carry out a linear accumulation under
A201001-2186
- 频谱分析仪是信号处理研究领域必不可少的工具。现有的基于快速傅利叶变换的频 谱分析仪能对线性的平稳的信号进行有效分析,但难以分析出非线性非平稳信号的瞬时频率 能量变化情况。针对此问题,本文设计了基于希尔伯特黄变换的频谱分析仪,能够对非平稳 信号进行有效分析。所设计系统以DE2-FPGA开发板为硬件平台,结合了NiosII的软核处 理器加以实现,可对采集的外部信号进行希尔伯特黄变换,得到信号的时间-频率-能量三维 谱,并可在VGA上实时显示出来。系统测试结果表明,所设计频谱分析仪
fir
- fir 滤波器的程序文件和测试文件,仿真数据和matlab仿真数据进行过比对,matlab采用fdatool生成的低通滤波器,采样率为24兆,通带2.5M,截止频率为5M(FIR filter program files and test files, simulation data and MATLAB simulation data have been compared, Matlab using FDATool generated low-pass filter, sampling rat
bi825
- SNR largest independent component analysis algorithm, This is a useful frequency estimation algorithm matlab simulation program, Partial least squares method.
myaby
- Calculating a target and ocean echo power spectral density, This is a useful frequency estimation algorithm matlab simulation program, Very convenient to use.
dv573
- You can get a very accurate amplitude, frequency, phase estimation, matlab wavelet analysis program, Correlation analysis process matlab method.
ADC_Data_Recv_Module
- 接收机测试输入信号, 生成正余弦波,采样率、频率、幅度、相位可调节 并将生成的数据进行输出 压缩包包括Verilog代码、testbench代码、word文档 matlab仿真代码(The receiver tests the input signal, Generation of positive cosine wave, sampling rate, frequency, amplitude, phase can be adjusted And output the generated da