Description: 用数字调制技术中的fsk调制方法，编写了一段调制程序，用来还不错就上传。-using digital modulation technique of fsk modulation method, the preparation of a modulation procedures used were pretty good on the upload. Platform: |
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Author:马卓 |
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Description: 脉冲编码调制（PCM）用于在数字传输媒体上传送模拟信号，在PCM中，首先对模拟信号以高于其带宽两倍的奈奎斯特率进行采样，然后对所得样本进行量化。采用不同量化级别生成的PCM编码会影响接收器重建模拟信号的质量。 -Pulse code modulation (PCM) for the media in the digital transmission of analog signal transmission in the PCM, the first analog signal to more than the Nyquist rate of twice the bandwidth sample, and then to quantify the samples. Using different quantization level generated PCM coding receiver will affect the quality of the reconstruction of analog signals. Platform: |
Size: 1024 |
Author:jack |
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Description: This project allows you to learn communication systems in greater depth. It contains the Simulink files (*.mdl) which are block design files of various communication systems such as AM, DSB-SC, FM, PLL, Data Acquisition, Digital Data Transmission, PCM and Delta Modulation.
The idea here is to implement experiments of a traditional communication lab using Simulink.
Most of the block diagrams are self explanatory. More information on the systems and their implementation can be found in the word documents included in the lab directories-This project allows you to learn communication systems in greater depth. It contains the Simulink files (*. mdl) which are block design files of various communication systems such as AM, DSB-SC, FM, PLL, Data Acquisition, Digital Data Transmission, PCM and Delta Modulation. The idea here is to implement experiments of a traditional communication lab using Simulink.Most of the block diagrams are self explanatory. More information on the systems and their implementation can be found in the word documents included in the lab directories Platform: |
Size: 2468864 |
Author:haibak |
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Description: 用matlab对基带数字系统进行仿真。整个系统描述了信号的发送和调制过程。其中调制采用16QAM，并且采用基带传输，不必调制到载频上。系统总采用了高斯信道，在接受端采用解调并与发送型号进行比较得到误码率。-Using matlab to base-band digital system simulation. Describes the overall system signal to send and modulation process. Which modulation using 16QAM, and uses baseband transmission without modulation to the carrier frequency. Total system using Gaussian channel demodulator used in the receiving end and be sent models to compare the bit error rate. Platform: |
Size: 4096 |
Author:dcping |
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Description: This Simulink model simulates as an example the transmission and reception of random digital data modulated with GMSK. The purpose of this model is to illustrate how part of the GSM transmission and reception works. It also measures the BER, affected by an AWGN channel. Platform: |
Size: 7168 |
Author:Ted |
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Description: Implementing quadrature modulation and demodulation of analog signals in digital signal processing, using MATLAB Platform: |
Size: 10240 |
Author:song |
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Description: 利用matlab对am，dsb，ssb，ask，fsk，bpsk信号进行正交调制解调仿真，并在不同信噪比条件下对其数字信号进行了误码率的计算。-Using matlab to am, dsb, ssb, ask, fsk, bpsk orthogonal signal modulation and demodulation simulation, and signal to noise ratio in different conditions of its digital signal to the bit error rate calculations. Platform: |
Size: 5120 |
Author:马浩飞 |
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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: communication system is expected to increase the service, the quality improvement and also the capacity, using spread spectrum communication system is one of the method to fulfill that demand. This quality and capacity factor will depend on the number of user. In order to see the performance of the Wiener Filter on the MC-CDMA system, simulation method is used by increasing the Direct Sequence Spread Spectrum CDMA signal, with digital modulation QPSK Platform: |
Size: 249856 |
Author:hario |
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Description: 利用Matlab仿真脉冲编码调制（PCM）及A律、μ律PCM对声音进行压缩编解码过程。
脉冲编码调制（PCM，Pulse Code Modulation）是一种将模拟语音信号转换成数字信号的编码方式。波形编码器的作用是对采样后的信号样本进行量化和编码。从数学上来看，量化过程就是把一个连续幅度值的无限数集合映射成一个离散幅度值的有限数集合，编码就是用一组二进制数来表示这些映射后的有限数。国际标准化的PCM采用折叠二进制码，符合长途电话质量。根据量化方法的不同，PCM可分为均匀量化PCM和对数PCM两大类，对数PCM中，2Aμ律和律编码都已被定为国际标准。-Matlab simulation using pulse code modulation (PCM) and the A law, μ law PCM codec for voice compression process.
Pulse Code Modulation (PCM, Pulse Code Modulation) is an analog voice signal into digital signal encoding. The role of the encoder waveform is sampled signal sample quantization and coding. From the mathematical point of view, the process is to quantify the magnitude of the value of a continuous set of infinite number of maps into a finite number of discrete set of amplitude values , encoding is to use a set of binary digits, said after a limited number of these maps. By folding the International Standardization of PCM binary code, in line with long-distance telephone quality. According to the different quantitative methods, PCM can be divided into uniform quantization PCM PCM and the number of two categories, on the number of PCM in, 2Aμ law and legal codes have been designated as international standards. Platform: |
Size: 954368 |
Author:tanii |
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Description: 为了使数字信号在有限带宽的高频信道中传输，必须对数字信号进行载波调制。就频带利用率和抗噪声性能（或功率利用率）两个方面来看， QPSK系统最佳。QPSK是利用载波的四种不同相位差来表征输入的数字信息，是四进制移相键控（QPSK）。本项目用MATLAB软件对四进制移相键控信号在AWQN信道中传输进行了建模和仿真，通过对仿真得到的误码率和理论误码率进行比较和分析，从而证明了MATLAB软件仿真QPSK调制解调的可行性。-In order to make the digital signal in the high-frequency channel of limited bandwidth transmission of digital signal carrier modulation. Two in terms of bandwidth efficiency and anti-noise performance (or power utilization), QPSK system the best. QPSK, four different phase characterized by the input digital information using carrier quaternary phase shift keying (QPSK). This project using MATLAB software quaternary phase shift keying signal channel transmission in AWQN modeling and simulation, to compare and analyze the error rate obtained by the simulation and theoretical bit error rate, thus proving the simulation of MATLAB software QPSK modulation and demodulation of feasibility.- Platform: |
Size: 3072 |
Author:黄兰凤 |
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Description: 利用Matlab编程的方法仿真数字通信系统。数字调制与解调系统：采用的是2FSK的调制方法；画出FSK调制后的频谱图；调制后的序列在传输的过程中产生高斯窄带白噪声；-The use of Matlab programming method simulation of digital communication system. Digital modulation and demodulation system: using the 2FSK modulation method draw FSK modulated spectrum modulated sequence in the transmission process resulting in Gauss narrow-band white noise Platform: |
Size: 1024 |
Author:nana |
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Description: 利用Matlab函数或者模块产生随机数据，经过16QAM数字调制，送入高斯白噪声信道；在接收端使用16QAM解调数据后，与信源数据进行误码率统计；分析误码率与信噪比的关系。-Have the random data using the Matlab function or the module, undergoes the 16QAM digital modulation, sends in the white gaussian noise channel After the receiving end uses the 16QAM demodulation data, carries on the error rate statistics with the source data Analysis error rate and signal-to-noise ratio relations.
Platform: |
Size: 1024 |
Author:yanye |
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Description: matlab的数字信号调制仿真-调制识别程序
本文首先对各种通信信号进行了理论分析， 在此基础上针对数字
调制信号采用了基于决策论方法的调制方式识别算法， 并利用
MATLAB 软件进行了计算机仿真。本文的调制识别算法是基于决策论
方法， 该方法具有运算量小， 识别效果好等优点。-matlab simulation of digital signal modulation- modulation recognition procedure in this article a variety of communication signals first theoretical analysis on the basis of the recognition algorithm based on decision theory methods of modulation for digital modulation signals and a computer simulation using MATLAB software . The modulation recognition algorithm is based on decision theory, the method of computing a small amount of good recognition effect. Platform: |
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Author:王萦 |
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Description: Matlab仿真通信系统的QPSK调制及相关解调，分别仿真数字信号在AWGN信道和Rayleigh衰落信道中的传输，包含内容：QPSK调制后的波形及其功率谱；AWGN信道输出波形及其功率谱；信号在Rayleigh信道之前与之后的星座图；6.用半波分析法仿真在AWGN信道与Rayleigh信道下的传输差错特性-Matlab simulation of QPSK modulation and demodulation of the communication system, are simulated digital signal transmission in AWGN and Rayleigh fading channels, with content: QPSK modulation waveform and power spectrum AWGN channel output waveform and power spectrum signal in Rayleigh channel before and after the constellation diagram 6. using half-wave analysis simulation characteristics of AWGN channel and Rayleigh channel transmission errors Platform: |
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Author:无名 |
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Description: Orthogonal frequency division multiplexing (OFDM) is becoming the chosen
modulation technique for wireless communications. OFDM can provide large data
rates with sufficient robustness to radio channel impairments. Many research centers
in the world have specialized teams working in the optimization of OFDM for
countless applications. Here, at the Georgia Institute of Technology, one of such
teams is in Dr. M. A. Ingram’s Smart Antenna Research Laboratory (SARL), a part
of the Georgia Center for Advanced Telecommunications Technology (GCATT).
The purpose of this report is to provide Matlab code to simulate the basic processing
involved in the generation and reception of an OFDM signal in a physical
channel and to provide a description of each of the steps involved. For this purpose,
we shall use, as an example, one of the proposed OFDM signals of the Digital
Video Broadcasting (DVB) standard for the European terrestrial digital television
(DTV) service.-Orthogonal frequency division multiplexing (OFDM) is becoming the chosen
modulation technique for wireless communications. OFDM can provide large data
rates with sufficient robustness to radio channel impairments. Many research centers
in the world have specialized teams working in the optimization of OFDM for
countless applications. Here, at the Georgia Institute of Technology, one of such
teams is in Dr. M. A. Ingram’s Smart Antenna Research Laboratory (SARL), a part
of the Georgia Center for Advanced Telecommunications Technology (GCATT).
The purpose of this report is to provide Matlab code to simulate the basic processing
involved in the generation and reception of an OFDM signal in a physical
channel and to provide a description of each of the steps involved. For this purpose,
we shall use, as an example, one of the proposed OFDM signals of the Digital
Video Broadcasting (DVB) standard for the European terrestrial digital television
(DTV) service. Platform: |
Size: 377856 |
Author:lemaster |
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Description: 基于matlab的海洋通信的基础猜想，采用数字调制，2径仿真，其中损耗采用HUAWEI早年实测模型-Based on the basis of conjecture matlab marine communications, digital modulation, two-path simulation, in which the loss measured using early model HUAWEI Platform: |
Size: 1024 |
Author:xuewei |
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Description: The digital simulation system using MATLAB to illustrate the
Quadrature Amplitude Modulation (QAM). QAM is a modulation scheme to convey two digital bit
streams which can be converted to symbol signals by modulating the amplitudes and the phase of two
carrier waves. First, we transmit a signal composed of two different 1024 bit streams and modulate
them using QAM. Next, at the receiver, we demodulate them using an orthogornality of two carriers
and matched filters. We also conduct the error analysis of two sampled signals in order to observe how
the probability of making bit errors changes depending on the inverse of Power Spectral Density (PSD)
of Additive White Gaussian Noise (AWGN). Platform: |
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Author:khang
|
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Description: There exist many textbooks that provide an in-depth treatment of various topics in digital modulation techniques.
Most of them underscore different theoretical aspects of the design and performance analysis of digital
modulation techniques. Only a handful of books provide insight on how these techniques can be modeled and
simulated. Predominantly, such books utilize the sophisticated built-in functions or toolboxes that are already
available in software like Matlab. These built-in functions or toolboxes hide a lot of background computations
from the user thereby making it difficult, especially for a learner, to understand how certain techniques are
actually implemented inside those functions. Platform: |
Size: 6261014 |
Author:mkaremm80 |
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Search - digital modulation using in matlab