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信号与系统软件实验工具箱，本系统包括七个实验，分别是：信号的时域基本运算、连续信号的卷积与连续时间系统的时域分析、离散信号的卷积与离散时间系统的时域分析、信号的频域分析、连续信号的采样与恢复、系统的频域分析、信号的幅度调制与解调。为了加强学生的计算机编程能力和应用能力，所有实验均提供设计性实验内容，让学生参与编程。本系统既可作为教师教学的实验演示，又可作为学生动手实验的实验系统。-Signals and Systems Software experimental toolbox, the sys
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QPSK调制与解调，低通滤波器采用了时域和频域两种实现方式，截止频率fc = 200hz,采样频率fs= 1000hz,欢迎下载参考！-QPSK modulation and demodulation, using a low-pass filter with a time domain and frequency domain implemented way, the cutoff frequency fc = 200hz, the sampling frequency fs = 1000hz
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幅频键控ASK的相干调制解调以及非相干调制解调的仿真实现，源代码中作了详细的备注，通过学习该代码能够对ASK的调制解调有更加深入的认识-Coherent amplitude and frequency shift keying ASK modulation and demodulation, and non-coherent modulation and demodulation simulation, source code made detailed notes, by learning t
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基于循环统计理论, 对循环平稳信号进行处理, 主要研究了信号的二阶循环统计特性, 即循环自相关函数和循环谱密度, 指出循环自相关函数不为零的循环频率对应着信号中的某些故障, 并
可以对调幅信号进行解调. 通过循环频率扫描方法提取的调制源分布在循环频率域的低频段, 其结
果可用循环频率-频率- 循环谱密度的三维图表示. 用仿真信号对该方法进行验证, 并应用于滚动轴承的内、外圈及滚动体的故障诊断, 可以有效地分离出所对应的故障特征频率.-Statistical theory based on
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pwm对于电机的转速调整，我们是采用脉宽调制（PWM）办法，控制电机的时候，电源并非连续地向电机供电，而是在一个特定的频率下以方波脉冲的形式提供电能。不同占空比的方波信号能对电机起到调速作用，这是因为电机实际上是一个大电感，它有阻碍输入电流和电压突变的能力，因此脉冲输入信号被平均分配到作用时间上，这样，改变在始能端PE2 和PD5 上输入方波的占空比就能改变加在电机两端的电压大小，从而改变了转速-PWM for motor speed adjustment, we are u
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本文主要利用matlab编程工具对直接序列扩频通信的捕获过程进行仿真。仿真主要基于滑动相关法的有关理论,先讨论扩频仿真中起着重要作用的m序列的生成问题,尔后讨论调制信号的产生,然后在信号的捕获中分步讨论,先对捕获的流程进行简单的仿真,再依次加入噪声和多普勒频移后进行捕获仿真-In this paper, using matlab programming tools for direct sequence spread spectrum communication capture process
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Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation and multiplexing technique
proposed for 3G, 4G LTE-A systems to achieve higher data rates with better spectral efficiency at low latency. Time
varying nature of the wi
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Multicarrier modulations attract a lot of attention ranging from wireline to wireless
communications compared to single carrier modulation because of theirs capability to
efficiently cope with frequency selective fading channels. Much of attentio
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Modulation is a process by which a carrier signal is altered according to information in a message signal. The carrier frequency, denoted Fc, is the frequency of the carrier signal. The sampling rate is the rate at which the message signal is sampled
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采用解调分析方法，从信号中提取调制信息，分析其强度和频次就可以判断研究对象（诸如机械零件）损伤的程度和部位。-Using the demodulation method, the modulation information is extracted from the signal, the strength and frequency analysis can determine the study (such as mechanical parts) and location of the
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基于FPGA的用verilog语言写的，改程序可产生不同调制系数和不同频率的AM波，长按按键切换调制度25 、50 、75 和短按按键切换调制信号频率1k、1.5k、2k、2.5k.-Based on the FPGA using verilog language, change the program can produce different coefficients and different frequency modulated AM wave, long press the butt
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2FSK频率选择法调制及相关检测、包络检测的matlab程序，供仿真参考-2FSK modulation frequency selection method and related testing, envelope detection matlab program for the simulation of reference
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应用psk调制解调技术和正交频分复用技术进行通信系统的仿真-Application psk modulation and demodulation technology and orthogonal frequency division multiplexing communication system simulation
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MSK调制，可以修改模块的信道、无线速率和功率，修改参数协议见易达讯无线模块参数设定协议。默认空中速率38.4K、信道为0信道、信道间隔为200KHz、载波基频434MHz、滤波带宽203KHz、CC1100模块发送以后进入接收模式。-MSK modulation, you can modify the module channel wireless speed and power, modify the parameters and protocols See Estar wireless m
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M-ary continuous phase frequency shift keying modulation and demodulation using matlab
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采用labwindows基于WRG-313短波接收机开发的BPM授时信号实时监测软件，可统计出各个频点的阻断率，平均调制度!-Labwindows based WRG-313 using shortwave receivers developed BPM timing signal real-time monitoring software, blocking rate statistics for each frequency point, the average modulation!
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将OFDM技术运用在可见光通信的研究，并且把OFDM的高峰均比这一缺点进行了建设性的运用。-In
particular, the use of OFDM (orthogonal frequency division
multiplexing) for intensity modulation is investigated. The high
peak-to-average ratio (PAR) in OFDM is usually considered
a disadvant
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低频信号先进行放大，再调制解调，设计发射机和接收机-Low-frequency signal is first amplified, and then modulation and demodulation, the transmitter and receiver design
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低频信号先进行放大，再调制解调，设计发射-Low-frequency signal is first amplified, and then modulation and demodulation, the transmitter
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This model demonstrates a DC-AC converter.
3 leg Mosfet operated inverter is constructed .
Can be used to demonstrate the relationship of input DC, output voltage, modulation index , filter selection and switching frequency.
3rd harmonic inject
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