Description: 数字基带传输系统的MATLAB仿真实现
function [sampl,re_sampl]=system_1(A,F,P,D,snr,m,N)
输入变量A ,F,P分别为输入信号的幅度、频率和相位，D为量化电平数，snr
为信道信噪比，N为D/A转换时的内插点数；输出变量sampl为抽样后的输入
信号，re_sampl为恢复出的输入信号。
数字基带传输系统的MATLAB仿真实现
[sampl,quant,pcm]=a_d_1(A,F,P,D)
[changed_ami]=signal_encod_1(pcm)
[ami_after_channel]=channel_1(changed_ami,snr)
[adjudged_ami]=adjudg_1(ami_after_channel,m)
re_pcm=signal_decod_1(adjudged_ami)
[re_voltag,re_sampl,re_sampl1]=d_a_1(re_pcm,sampl,D,N)-Digital baseband transmission system implementation MATLAB simulation function [sampl, re_sampl] = system_1 (A, F, P, D, snr, m, N) input variables A, F, P, respectively, for the input signal amplitude, frequency and phase , D to quantify the number of electric-ping, snr for the channel signal to noise ratio, N to D/A converter when the interpolation points output variables for the sample after Sampl input signal, re_sampl for the restoration of the input signal. Digital baseband transmission system simulation MATLAB implementation [sampl, quant, pcm] = a_d_1 (A, F, P, D) [changed_ami] = signal_encod_1 (pcm) [ami_after_channel] = channel_1 (changed_ami, snr) [adjudged_ami] = adjudg_1 (ami_after_channel, m) re_pcm = signal_decod_1 (adjudged_ami) [re_voltag, re_sampl, re_sampl1] = d_a_1 (re_pcm, sampl, D, N) Platform: |
Size: 4096 |
Author:Joseph |
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Description: 文中应用软件无线电思想对数字下变频器中的几个关键技术进行了研究,对下变频各个模块所涉及到的CIC、HB、FIR等关键算法进行了讨论、提炼与总结,应用matlab软件设计了下变频器中的CIC、HB、FIR滤波器等核心模块,并将各模块融为一体从软件实现的角度完成了对系统的搭建和功能仿真.仿真结果表明,系统实现了对中频信号的下变频处理且无失真现象,大大减少了软件无线电系统数宁信号处理的运算量和数据的存储量,极大地提高了系统的实时性.-The paper application software radio digital down converter in the thinking of several key technologies have been studied for the next conversion involved in each module to the CIC, HB, FIR and other key algorithms were discussed, refined and summarized the application of matlab software design downconverter in the CIC, HB, FIR filters and other core modules, and integration of various modules from the software point of complete structures and functions of the system simulation. The simulation results show that the system achieved the right under the IF signal Frequency processing and without distortion, thus greatly reducing the number of software-defined radio system, rather the amount of signal processing operations and data storage capacity, greatly improve the system in real time. Platform: |
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Description: matrix converter-it s an ac to ac converter with unrestriction on frequency,it got the pure sinusoidal and i/p and o/p waveforms-matrix converter-it s an ac to ac converter with unrestriction on frequency,it got the pure sinusoidal and i/p and o/p waveforms Platform: |
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Description: Hybrid PV-wind generation shows higher
availability as compared to PV or wind alone. For rural
electrifications, researches are focused on hybrid power system
which provides sustainable power. The variable voltage and
frequency of the self excited induction generator (SEIG) is
rectified through Vienna rectifier (three switches) to the required
D.C voltage level and fed to common D.C bus. The variable output
voltage of PV module is controlled by DC/DC converter using
proposed fuzzy logic controller and fed to common D.C bus. The
DC bus collects the total power from the wind and photovoltaic
system and used to charge the battery as well as to supply the A.C
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MATLAB simulations for the entire scheme is presented. Results
from the simulations and experimental tests bring out the
suitability of the proposed hybrid scheme in remote areas. Platform: |
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Author:hareesh |
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Description: 首先，介绍了交流调速及其相关技术的发展现状和发展趋势，以及交流调速系统的主要控制策略。选用工业变频器用异步电机作为研究对象，利用坐标变换理论，分析了异步电机在三相静止坐标系、两相静止与旋转坐标下的电机基本数学模型及其矢量控制原理。利用转子磁场定向的矢量控制技术，实现了异步电机定子电流的转矩分量和励磁分量的解耦。分析了空间矢量脉宽调制算法以及实现方法，最后设计了异步电机的双闭环矢量控制系统。
然后，利用Matlab/Simulink搭建了异步电机数学模型，建立了基于电压空间矢量脉宽调制的异步电机矢量控制模型，包括电机模块、坐标变换模块、磁链观测模块、PI 调节模块、SVPWM 模块等，进行了电压电压空间矢量控制的仿真验证。-this paper introduced the current condition and future trend of AC speed-adjustmentSystem and its main control strategies, on the base of the asynchronous motor used in industrial frequency converter , the mathematical model under three-phase static coordinate system , two-phase static coordinate system and circular coordinate system and the principle of vector conttrol are analyzed by using the theory of coordinate transformation . Then the components between torque and magnetic field of stator winding currrent are decoupled which uses the rator-field-oriented technology.After space vector PWM modulation algorithms and implementation methods have been analyzed, dual closed-loop vector control system of asynchronous motor isworked out. Platform: |
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Description: 基于 TMS320F2812 的变压变频器设计及 MATLAB
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Author:学术爬虫 |
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