Description: ％The phase locked loop(PLL),adjusts the phase of a local oscillator
％w.r.t the incoming modulated signal.In this way,the phase of the
％incoming signal is locked and the signal is demodulated.This scheme
％is used in PM and FM as well.
％We will implement it by using a closed loop system.Control systems
％techniques are applied here.- The phase locked loop (PLL), adjusts the phase of a local oscillator wrt the incoming modulated signal.In this way, the phase of the incoming signal is locked and the signal is demodulated.This scheme is used in PM and FM as well. We will implement it by using a closed loop system.Control systems techniques are applied here. Platform: |
Size: 2048 |
Author:张勇 |
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Description: 用matlab程序实现对音频信号幅度调制的仿真结果-Matlab program used for audio signal amplitude modulation simulation results Platform: |
Size: 4096 |
Author:liruixian |
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Description: Obtain the CDF plots of PAPR from an OFDM BPSK transmission specified per IEEE 802.11a specification
Per the IEEE 802.11a specifications, we 52 have used subcarriers. Given so, the theoretical maximum expected PAPR is 52 (around 17dB). However, thanks to the scrambler, all the subcarriers in an OFDM symbol being equally modulated is unlikely.
Using a small script, the cumulative distribution of PAPR from each OFDM symbol, modulated by a random BPSK signal is obtained Platform: |
Size: 26624 |
Author:陈语恬 |
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Description: We simulate uncoded BER of BPSK modulated
data as a function of SNR
-in an AWGN channel
-in a Rayleigh fading channel
-in an AWGN channel when direct sequence spreading
is used
and compare results to the theoretical ones.
We assume coherent receiver and perfect
synchronization.- We simulate uncoded BER of BPSK modulated
data as a function of SNR
-in an AWGN channel
-in a Rayleigh fading channel
-in an AWGN channel when direct sequence spreading
is used
and compare results to the theoretical ones.
We assume coherent receiver and perfect
synchronization. Platform: |
Size: 18432 |
Author:Erfaan |
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Description: 用MATLAB编写程序实现BPSK的调制与解调过程，并且为了模拟数字通信系统过程，在调制后加入高斯白噪声。-MATLAB program used to prepare the BPSK modulation and demodulation process, and in order to simulate the process of digital communication system, in the modulated Gaussian white noise after. Platform: |
Size: 1024 |
Author:王丽越 |
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Description: 计算信号循环谱的函数：
这个函数用来计算数字调制信号的循环谱图，结果存放在sxf中，surf和shading interp这两个函数配合使用就可以得到信号的循环谱图-Calculate the signal cyclic spectrum function:
This function is used to calculate the cycle spectrum of digitally modulated signals, the result stored in the sxf in, surf, and shading interp these two functions can be used in conjunction with the cycle of the signal spectrum Platform: |
Size: 1024 |
Author:杨立儒 |
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Description: 一、 本程序采用16QAM调制方式，对一串2进制信源进行调制，采用（7，4）循环码对信源做信道编码，用升余弦滚降函数进行基带调制，再调到高频信道；在信道上加入高斯白噪声，运用匹配滤波器解调，画出解调星座图，运用最小欧氏距离译码判决，再对信号进行信道解码，画出采用信道编码技术和不采用信道编码技术的误比特率图。-First, this program uses 16QAM modulation mode, for a string of two binary source is modulated, using (7,4) cyclic code of the source-channel coding to do with a raised cosine roll-off function for base-band modulation, and then transferred to a high frequency channel in the channel by adding Gaussian white noise, the use of matched filter demodulation, demodulation constellation plot, using the minimum Euclidean distance decoding decision, and then right channel signals, decoding, channel coding techniques used to draw and non- channel coding techniques using bit error rate plans. Platform: |
Size: 90112 |
Author:zhaoyang |
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Description: 此程序参照了IEEE 802.11a ，使用了52个子载波。理论期望papr为52.但是由加扰器的存在，所有子载波很难一直的调制-Per the IEEE 802.11a specifications, we 52 have used subcarriers. Given so, the theoretical maximum expected PAPR is 52 (around 17dB). However, thanks to the scrambler, all the subcarriers in an OFDM symbol being equally modulated is unlikely.
Platform: |
Size: 1024 |
Author:王小明 |
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Description: An 8-QAM communications channel simulation in Simulink, constructed from a 16-QAM model and using an I,Q correlation receiver.
QAM (quadrature amplitude modulation) is a method of combining two amplitude-modulated (AM) signals into a single channel, thereby doubling the effective bandwidth. QAM is used with pulse amplitude modulation (PAM) in digital systems, especially in wireless applications. In a QAM signal, there are two carriers, each having the same frequency but differing in phase by 90 degrees (one quarter of a cycle, from which the term quadrature arises). One signal is called the ‘I’ signal, and the other is called the ‘Q’ signal. Mathematically, one of the signals can be represented by a sine wave, and the other by a cosine wave. The two modulated carriers are combined at the source for transmission. At the destination, the carriers are separated, the data is extracted from each, and then the data is combined into the original modulating information. -An 8-QAM communications channel simulation in Simulink, constructed from a 16-QAM model and using an I,Q correlation receiver.
QAM (quadrature amplitude modulation) is a method of combining two amplitude-modulated (AM) signals into a single channel, thereby doubling the effective bandwidth. QAM is used with pulse amplitude modulation (PAM) in digital systems, especially in wireless applications. In a QAM signal, there are two carriers, each having the same frequency but differing in phase by 90 degrees (one quarter of a cycle, from which the term quadrature arises). One signal is called the ‘I’ signal, and the other is called the ‘Q’ signal. Mathematically, one of the signals can be represented by a sine wave, and the other by a cosine wave. The two modulated carriers are combined at the source for transmission. At the destination, the carriers are separated, the data is extracted from each, and then the data is combined into the original modulating information. Platform: |
Size: 11264 |
Author:Griffin Wright |
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Description: Example of a two-dimensional Gabor filterIn image processing, a Gabor filter, named after Dennis Gabor, is a linear filter used for edge detection. Frequency and orientation representations of Gabor filter are similar to those of human visual system, and it has been found to be particularly appropriate for texture representation and discrimination. In the spatial domain, a 2D Gabor filter is a Gaussian kernel function modulated by a sinusoidal plane wave. The Gabor filters are self-similar – all filters can be generated from one mother wavelet by dilation and rotation
Platform: |
Size: 7168 |
Author:Real1 |
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Description: ：SPWM调制技术是通过改变输出方波的占空比来改变等效的输出电压，其调制波为正弦波，脉冲宽度间占空
比按正弦规率排列， 这样输出波形经过适当的滤波可以做到正弦波输出。它广泛的用于支流交流逆变器。本次实
验使用Matlab/Simulink对SPWM技术进行仿真并分析数据。-: SPWM modulation by changing the duty cycle square wave output to change the equivalent output voltage, the modulated sine wave, pulse width, duty cycle between the rate at sine arranged so that the filter output waveform can be done properly to the sine wave output. It is widely used in branch AC inverter. The experiment uses Matlab/Simulink simulation of the SPWM technique and analyze data. Platform: |
Size: 651264 |
Author:fmx |
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Description: 在MATLAB中编一个2FSK调制的信号，可以用类似方式产生2psk信号等等其他调制信号-A 2FSK in MATLAB code modulated signal can be used to produce a similar manner 2psk modulation signal, and so other Platform: |
Size: 1024 |
Author:黄瓜 |
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Description: 用matlab进行AMI编码的调试并进行文本的输出与输入 同时还可以直观的看到波形图-MATLAB program used to prepare the
AMI modulation and demodulation process, and in order to simulate the process of digital communication system, in the modulated Gaussian white noise after. Platform: |
Size: 10240 |
Author:呵呵 |
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Description: 基于 Matlab Simulink 的频谱分析。-The objectives of this laboratory are:
To introduce the spectrum analyzer as used in frequency domain analysis.
To identify various types of linear modulated waveforms in time and frequency domain representations.
To implement theoretically functional circuits using the Communications Module Design System (CMDS). Platform: |
Size: 560128 |
Author:唐瀚 |
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Description: 该程序是基于Eldar论文仿真用于实现MWC-This package is used to simulate the Modulated Wideband Converter in MATLAB Platform: |
Size: 5120 |
Author:zhangdianhua |
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Description: 已调的SVM多分类的MATLAB代码，包括原始数据，很好用的-Modulated SVM multi-classification MATLAB code, including raw data, well used Platform: |
Size: 11264 |
Author:sunshaui |
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Description: 用于产生AM调制信号，并绘出时域和频域信号。对于MATLAB初学者来说，十分实用-AM modulated signal is used to generate and plot the time domain and frequency domain signals. MATLAB for beginners, very useful Platform: |
Size: 1024 |
Author:启政 |
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Description: The implementation was built on Matlab/Simulink using
fundamental components in Simulink to demonstrate how
reliably complex modulation schemes can be built, cost
effectively and efficiently [5]. The design of ZigBee
transmitter using MSK modulation is shown in the Figure 1.
Here we map input data bits to 8-chip PN sequences to be
transmitted and results in a chip rate of two mega chips per
second. After that, resultant chip sequence is send to the serial
to parallel converter. It is used here to separate the odd and
even bit indexed chips. Following this bipolar data formatting
is performed and signal modulated with a 2.4 GHz carrier on
the In Phase and QuadraturePhase data stream and adds it to
get the required transmitter output signal. Platform: |
Size: 11264 |
Author:sabina |
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Description: 可以得到很精确的幅值、频率、相位估计，调试通过可以使用，matlab小波分析程序，使用混沌与分形分析的例程，Relief计算分类权重，随机调制信号下的模拟ppm。- You can get a very accurate amplitude, frequency, phase estimation, Debugging can be used, matlab wavelet analysis program, Use Chaos and fractal analysis routines, Relief computing classification weight, Random ppm modulated analog signal unde. Platform: |
Size: 7168 |
Author:jjqndph |
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Description: Constituting the modulated signals of different frequencies, Modern signal processing used in the spectral estimation in matlab, Contains two clients receive link-level communications program. Platform: |
Size: 60416 |
Author:jengfenfang
|
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