资源简介
Matlab锁相环仿真-Phase Locked Loop.rar
锁相环的matlab仿真
所含文件:
Figure19.jpg 锁相环仿真
锁相环的matlab仿真
所含文件:
Figure19.jpg 锁相环仿真

代码片段和文件信息
%% Demo: Phase Locked Loop
% This demo shows the executable specifications and design with simulation
% capabilities of Simulink. It highlights:
%
% 1. Creating conceptual models of signal processing systems and running
% simulations
%
% 2. Adding finite state machines to the design
%
% 3. Creating models of physical components (e.g. circuitery)
%
% 4. Using discrete-time signal to create mixed-signal models
%
% 5. Converting digital models to fixed-point
%
% 6. Optional: (not implemented yet) generating C and/or HDL
%% What is a Phase-Locked Loop?
% A phase-locked loop (PLL) is a closed-loop feedback control system that
% generates and outputs a signal in relation to the frequency and phase of
% an input (“reference“) signal. A phase-locked loop circuit responds to
% both the frequency and the phase of the input signals automatically
% raising or lowering the frequency of a controlled oscillator until it is
% matched to the reference in both frequency and phase.
%
% This type of mechanism is widely used in radio telecommunications
% computers and other electronic applications where it is desired to
% stabilize a generated signal or to detect signals in the presence of
% noise. Since an integrated circuit can hold a complete phase-locked loop
% building block the technique is widely used in modern electronic
% devices with signal frequencies from a fraction of a cycle per second up
% to many gigahertz. (Source: wikipedia.org.)
%% A linear Phase Locked Loop in Simulink
% The first step of the demo shows how to model and simulate a linear PLL
% that can track a 1 MHz reference signal.
%
% A classic or linear PLL uses a mixer as a phase detector. This yields a
% DC component that is proportional (but not linear) with the phase
% difference and a component at a frequency that is twice the input
% frequency. A loop filter is used to get rid of the second component. The
% output of the loop filter is fed into a VCO that increases the freqeuncy
% if there is a positive phase difference and that decreases the frequency
% if there is a negative phase difference.
%
% Start with the basic components of a PLL: a Multiply block (Math
% Library) an Analog Filter Design block (Filter Design library in the
% Signal Processing Blockset) and a Voltage Controlled Oscillator
% (Communications Blockset Components sublibrary in the Synchronization
% library).
%
% Double click on the blocks to show how to set the parameters for each
% block:
%
% The Analog Filter Design block;
% Design method: butterworth
% Filter type: Lowpass
% Filter order: 5
% Passband edge frequency: 1e6*2*pi.
%
% The VCO block;
% Quiescent frequency: 1e6
% Input sensitivity: 1e5
% Initial phase: 0.
open_system(‘linearpll‘); set_param(bdroot‘SimulationCommand‘ ‘update‘)
sim(bdroot);
%%
% In order to simulate the system we need a test input and vizualiation.
% To achieve this add a S
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
....... 37898 2007-04-19 12:30 Phase+Locked+Loop\cppll.mdl
文件 45910 2007-05-04 09:44 Phase+Locked+Loop\dpll.mdl
....... 46721 2007-04-19 17:04 Phase+Locked+Loop\dpll_fixpt.mdl
文件 31431 2007-05-04 09:41 Phase+Locked+Loop\linearpll.mdl
文件 16037 2007-05-04 09:50 Phase+Locked+Loop\plldemo.m
....... 47261 2007-04-26 13:08 Phase+Locked+Loop\powerpll.mdl
文件 238484 2007-05-04 09:59 Phase+Locked+Loop\html\fixpttool.jpg
文件 38042 2007-05-04 09:56 Phase+Locked+Loop\html\plldemo.html
文件 4347 2007-05-04 09:56 Phase+Locked+Loop\html\plldemo.png
文件 9728 2007-05-04 09:55 Phase+Locked+Loop\html\plldemo_01.png
文件 6033 2007-05-04 09:55 Phase+Locked+Loop\html\plldemo_02.png
文件 5134 2007-05-04 09:55 Phase+Locked+Loop\html\plldemo_03.png
文件 8169 2007-05-04 09:55 Phase+Locked+Loop\html\plldemo_04.png
文件 8519 2007-05-04 09:55 Phase+Locked+Loop\html\plldemo_05.png
文件 14397 2007-05-04 09:55 Phase+Locked+Loop\html\plldemo_06.png
文件 10221 2007-05-04 09:55 Phase+Locked+Loop\html\plldemo_07.png
文件 8674 2007-05-04 09:56 Phase+Locked+Loop\html\plldemo_08.png
文件 5169 2007-05-04 09:56 Phase+Locked+Loop\html\plldemo_09.png
文件 9645 2007-05-04 09:56 Phase+Locked+Loop\html\plldemo_10.png
文件 6896 2007-05-04 09:56 Phase+Locked+Loop\html\plldemo_11.png
文件 5358 2007-05-03 16:26 Phase+Locked+Loop\html\plldemo_eq79689.png
文件 14387 2007-04-19 12:17 Phase+Locked+Loop\html\pfd.jpg
..A.SH. 43520 2007-05-04 10:00 Phase+Locked+Loop\html\Thumbs.db
文件 921 2009-04-15 19:25 Phase+Locked+Loop\slprj\_sfprj\cppll\_self\sfun\src\c2_cppll.h
文件 24348 2009-04-15 19:25 Phase+Locked+Loop\slprj\_sfprj\cppll\_self\sfun\src\c2_cppll.c
文件 977 2009-04-15 19:25 Phase+Locked+Loop\slprj\_sfprj\cppll\_self\sfun\src\cppll_sfun.h
文件 5942 2009-04-15 19:25 Phase+Locked+Loop\slprj\_sfprj\cppll\_self\sfun\src\cppll_sfun.c
文件 15568 2009-04-15 19:25 Phase+Locked+Loop\slprj\_sfprj\cppll\_self\sfun\src\cppll_sfun_debug_macros.h
文件 6509 2009-04-15 19:25 Phase+Locked+Loop\slprj\_sfprj\cppll\_self\sfun\src\cppll_sfun_registry.c
文件 51 2009-04-15 19:25 Phase+Locked+Loop\slprj\_sfprj\cppll\_self\sfun\src\cppll_sfun.bat
............此处省略69个文件信息
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