Description: 数字信号处理的应用之一是从含有加性噪声的信号中去除噪声。现有被噪声污染的信号x[k]=s[k]+d[k],式中： 为原始信号d[k]为均匀分布的白噪声。
（1）分别产生50点的序列s[k]和白噪声序列d[k],将二者叠加生成x[k],并在同一张图上绘出x0[k],d[k]和x[k]的序列波形。
（2）均值滤波可以有效去除叠加在低频信号上的噪声。已知3点滑动平均数字滤波器的单位脉冲响应为h[k]=[1,1,1 k=0,1,2],计算y[k]=x[k]*h[k],在同一张图上绘出前50点y[k],s[k]和x[k]的波形，比较序列y[k]和s[k]。
-digital signal processing applications from one containing additive noise signal denoising. Existing noise pollution was a signal x [k] = s [k] d [k], where : of the original signal d [k] uniform distribution of white noise. (1) have 50 points each sequence s [k] and white noise sequence d [k] superposition of the two generation x [k] and the same is likely to draw a map x0 [k] d [k] and x [k] waveform sequence. (2) mean filter can effectively remove superimposed on the low-frequency noise on the signal. 3:00 known moving average digital filter unit for pulse response h [k] = [k = 0,1,2 1,1,1] Calculation y [k] = x [k]* h [k], the same is likely to draw a map before 50 y [k] s [k] and x [k] waveform sequence comparison y [k] s and [k]. Platform: |
Size: 28672 |
Author:魏臻 |
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Description: matlab用于信号发生器产生波形，正弦波，方波等-matlab for the signal waveform generator, sine wave, square wave, etc. Platform: |
Size: 13312 |
Author:毛名言 |
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Description: DSB-SC信号的生成与解调
1) 用离散（DSP）的方法生成DSB信号
2) 载波频率为150KHz，音频为500Hz和2000Hz的混合音。
3) 加入高斯白噪声
（4） 语音信号
的传输。
改变抽样频率和量化台阶大小，观察重建信号以及量化噪声信号的波形；对于语音信号主观评价声音质量的变化。
-DSB-SC signal generation and demodulation 1) Discrete (DSP) methods to generate DSB signal 2) the carrier frequency to 150KHz, audio 500Hz and 2000Hz for the mixed tone. 3) by adding white Gaussian noise (4) transmission of voice signals. Change the sampling frequency and quantization step size, to observe the reconstruction of signal and quantization noise signal waveform for subjective evaluation of the speech signal changes in sound quality. Platform: |
Size: 28672 |
Author:Ryan |
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Description: 基于变速恒频双馈风力发电系统的理论分析，文中将应用MATLAB／Simulink建立整个系统的模型，主要包括风力机、双馈发电机(含转子侧和网侧变换器)、控制器(含网侧变换器控制器、转子侧变换器控制器)。通过建立的模型对仿真波形进行分析，验证模糊控制器的可行性。-Based VSCF doubly fed wind power generation systems theory, this paper, the application of MATLAB/Simulink model for the establishment of the whole system, including wind turbine, doubly-fed generator (including the rotor and the network side converter), the controller (including net side converter controller, the rotor side converter controller). Through the establishment of the model to analyze the simulation waveform to verify the feasibility of fuzzy controller. Platform: |
Size: 2400256 |
Author:wuxing |
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Description: 单脉冲雷达信号的波形的产生和其模糊函数的计算，以及模糊函数的图形。-Single-pulse radar signal waveform generation and the calculation of its ambiguity function, and the ambiguity function of the graphics. Platform: |
Size: 1024 |
Author:jackyli |
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Description: 本文利用小波以及小波包在数字信号处理中表现出来的优势，将其应用到变换域通信(TDCS)中。针对基于傅里叶变换估计方法无法对非平干扰进行有效估计的缺点，于是小波技术被应用于谱估计中。作为TDCS通信前端的频谱感知阶段所应用的数学工具，进行频谱感知，小波变换可以确定干扰所在频段以及创建小波基函数，用于数据传输。并且将其与其他变换方式的应用场合以及性能进行对比。并且针第二代小波良好的数据压缩性能，拟将其应用于TDCS中，对干扰频谱进行进一步压缩-The article utilized the advantages of wavelet and wavelet packet synthesis applying in the digital signal processing domain, and applied it into the Transform Domain Communication System (TDCS). To composite the shortcomings in Fourier Transform in non-stationary noise, wavelet transform are introduced. As a mathematical tool before transformation, wavelet transform will sensing the environment, locate the interference and create a fundamental modulation waveform（FMW）。Comparison with other kinds of transforms is made in this article as well. As the same time, the second generation wavelet has a good performance in data comprising, we could consider utilizing it into further lifting in the quality of the sensing period. Platform: |
Size: 698368 |
Author:mini |
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Description: 在MATLAB中对超宽带波形设计中产生其前十五阶导数的仿真程序及多径传播的仿真程序-In MATLAB, the design of ultra-wideband waveform generation derivative of its first fifteen simulation program and multi-path propagation of the simulation program Platform: |
Size: 3072 |
Author:yalinlee |
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Description: 为了使数字信号在信道中有效地传播，必须使用数字基带信号的调制与解调，以使得信号与信道的特性相匹配。基于matlab实验平台实现对数字信号的2psk的调制与解调的模拟。本文详细的介绍了PSK波形的产生和仿真过程加深了我们对数字信号调制与解调的认知程度。-To make effective dissemination of the digital signals in the channel, must use the modulation and demodulation of the digital baseband signal, such that the signal and channel characteristics match. Based on the simulation matlab experimental platform of the digital signal 2psk modulation and demodulation. This paper introduces the the PSK waveform generation and simulation process has deepened our awareness level of the digital signal modulation and demodulation. Platform: |
Size: 5120 |
Author:晓清 |
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Description: Generation of ASK:
Amplitude shift keying - ASK - in the context of digital communication is a modulation process which imparts to a sinusoid two or more discrete amplitude levels 1. These are related to the number of levels adopted by the digital message. For a binary message sequence, there are two levels one of which is typically zero. Thus the modulated waveform consists of bursts of a sinusoid.
Demodulation of ASK:
ASK signal has a well defined envelope. Thus it is amenable to demodulation by an envelope detector. Some sort of decision-making circuitry is necessary for detecting the message. The signal, which is a binary sequence is recovered by using a correlator and decision making circuitry.
Matlab Program for Frequency shift keying
program for Quadrature Amplitude Modulation
Matlab program for phase shift keying
program for Quadrature Phase shift keying-Generation of ASK:
Amplitude shift keying - ASK - in the context of digital communication is a modulation process which imparts to a sinusoid two or more discrete amplitude levels 1. These are related to the number of levels adopted by the digital message. For a binary message sequence, there are two levels one of which is typically zero. Thus the modulated waveform consists of bursts of a sinusoid.
Demodulation of ASK:
ASK signal has a well defined envelope. Thus it is amenable to demodulation by an envelope detector. Some sort of decision-making circuitry is necessary for detecting the message. The signal, which is a binary sequence is recovered by using a correlator and decision making circuitry.
Matlab Program for Frequency shift keying
program for Quadrature Amplitude Modulation
Matlab program for phase shift keying
program for Quadrature Phase shift keying
Platform: |
Size: 3072 |
Author:punitha sp |
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Description: 在matlab环境中自动识别连通区域的大小,进行波形数据分析,通过反复训练模板能有较高的识别率，MIMO OFDM matlab仿真,最大信噪比的独立分量分析算法，包含位置式PID算法、积分分离式PID，仿真效率很高的，GSM中GMSK调制信号的产生。- Automatic identification in the matlab environment the size of the connected area, Waveform data analysis, Through repeated training BBNhPFClate have higher recognition rate, MIMO OFDM matlab simulation, SNR largest independent component analysis algorithm, It contains positional PID algorithm, integral separate PID, High simulation efficiency, GSM is GMSK modulation signal generation. Platform: |
Size: 7168 |
Author:tfvwakccc |
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