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Description: DSB调制解调，并且加入了高斯白噪声和带通滤波器，模拟了完整的系统-DSB modem, and joined the Gaussian white noise and band-pass filter to simulate a complete system
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Size: 1024 |
Author: 张传志 |
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Description: 设定噪声为高斯白噪声，对2PSK调制解调的误码率进行统计，并与理论值进行比较，以图形方式表示误码率与信噪比间的关系。
-Set the noise is Gaussian white noise on the BER 2PSK modem statistics, and compared with the theoretical value, a graphical representation of the bit error rate and SNR relationships.
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Size: 1024 |
Author: 温倩 |
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Description: bpsk调制解调matlab代码，给出了在噪声信道下bpsk调制解调的matlab实现-bpsk modulation and demodulation matlab code is given in the noise channel bpsk modem implementation in matlab
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Size: 2048 |
Author: iamsyy |
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Description: NRZ信源 通过bpsk调制 解调 然后通过白噪声信道 求解误码率-NRZ source bpsk modem and then through the white noise channel bit error rate solution
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Size: 1024 |
Author: zjy |
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Description: 对随机序列进行（7,4）汉明码编码，经过bpsk调制解调，然后译码，最后绘出信噪比与误码率的关系曲线-Random sequences (7,4) hamming code encoding, after bpsk modem, and then decoding, and finally draw the signal to noise ratio and bit error rate curve
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Size: 1024 |
Author: lvdelong |
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Description: QPSK仿真程序，包括调制解调，加高斯白噪声的-QPSK simulation program, including the modem, add Gaussian white noise
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Size: 1024 |
Author: 谢彦浩 |
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Description: ASK仿真，包含调制解调，加高斯白噪声，matlab程序-ASK simulation, including the modem, add Gaussian white noise, matlab program
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Size: 1024 |
Author: 谢彦浩 |
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Description: 根据直扩原理，首先有随机数发生器产生一系列二进制信息数据（+1，-1），每个信息比特重复Lc次，Lc对应每个信息比特所包含的伪码片数，包含每一比特Lc次重复的序列与另一个随机数发生器产生的PN序列c(n)相乘。然后在该序列上叠加高斯白噪声和形式为i(n)=Acosw0n余弦干扰下次信号，切余弦干扰信号的振幅满足条件A<Lc。在解调器中进行与PN序列的互相关运算，并且将组成各信息比特的Lc个样本进行求和。加法器的输出送到判决器，将信号与门限值0进行比较，确定传送的数据为+1还是-1，计数器用来记录判决器的错判数目。-According to the principle, first some straight expansion random number generator produces a series of binary data (+ 1-1), each information bit repetitive Lc times, Lc for each information bit contains PN code piece count, embraces each bit Lc times repeated sequence and another random number generator produces PN sequence c (n) multiplication. Then in the sequence superimposed on gaussian white noise and forms as I (n) = Acosw0n cosine interference next time signal, cut cosine interfering signal amplitude satisfy conditions A < Lc. In the modem with the cross-correlation operation PN sequence, and the information will comprise the Lc a sample bits peace. The output of the adder judgment device, will signal to compare with threshold 0 data transmitted, determine for+ 1 or-1, counter is used to record the number victimised judgment.
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Size: 1024 |
Author: 余甜 |
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Description: 16qam，成型滤波器，加入载波，高斯噪声，调制解调多个星座图等 -16qam, shaping filter, adding the carrier, Gaussian noise, such as modem over Constellation
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Size: 1024 |
Author: raul |
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Description: 从基带信号产生——IQ映射——调制——信道加噪——解调——判决及反映射——接收信号输出，每个步骤都画出了图形。
-From the baseband signal- IQ mapping- Modulation- channel with noise- modem- judgments and reflect radio- receiver signal output, each of these steps are drawn graphics.
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Size: 1024 |
Author: ccc |
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Description: 用MATLAB编写与仿真了MSK信号，其中结合了自己写的快速傅立叶变换实现了MSK信号的调制还有解调，而且作为拓展，还加入噪声、通过带通滤波器、低通滤波器、载波信号等等。调制解调都很有用，画出的图也很漂亮规范。-Using MATLAB and the simulation of the MSK signal, which combines the fast Fourier transform to write their own modulation there demodulation of MSK signals, but also as a development, but also by adding noise, band-pass filter, low pass filter, the carrier signaland so on. The modem is very useful to draw the plan is also very beautiful and specification.
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Size: 2048 |
Author: danny |
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Description: Simulink是MATLAB最重要的组件之一，它提供一个动态系统建模、仿真和综合分析的集成环境。在该环境中，无需大量书写程序，而只需要通过简单直观的鼠标操作，就可构造出复杂的系统。Simulink具有适应面广、结构和流程清晰及仿真精细、贴近实际、效率高、灵活等优点，并基于以上优点Simulink已被广泛应用于控制理论和数字信号处理的复杂仿真和设计。同时有大量的第三方软件和硬件可应用于或被要求应用于Simulink。-Abstract: In the development of communication technology, communication system simulation technology is a technical focus. This paper will focus on simulation of communication systems in the modem system and the basic principles of anti-noise performance and MATLAB simulation software platform to achieve some common analog modulation. The most important of the most commonly used analog modulation is the sine wave as a carrier perspective modulation and amplitude modulation. Common AM (AM), with bilateral (DSB), residual sideband (VSB) and single sideband (SSB) modulation,
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Size: 2048 |
Author: y c |
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Description: 该程序是一个完整的模拟信号数字化传输系统的程序，它进过了PCM编码，2FSK调制解调和一个高斯白噪声，并有误码率的测量-The program is a complete program for the analog signal digital transmission system, it been to the PCM coding, 2FSK modem and a Gaussian white noise, and BER measurement
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Size: 2048 |
Author: wangpeng |
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Description: 根据软件无线电的思想，提出了一种新颖的数字信号处理算法，对QPSK信号的相位进行数字化处理，从而实现对QPSK信号的解调.该算法允许收发两端载波存在频差，用数字锁相实现收发端载波的同步，在频偏较大的情况下，估算频偏的大小，自适应设置环路的带宽，实现较短的捕获时间和较好的信噪性能。整个设计基于XILINX公司的ISE开发平台，并用Virtex-II系列FPGA实现。用FPGA实现调制解调器具有体积小、功耗低、集成度高、可软件升级、扰干扰能力强的特点，符合未来通信技术发展的方向。-According to the idea of software radio, a novel digital signal processing algorithm, the phase of QPSK digital signal processing, enabling the demodulation of QPSK signals. This algorithm allows the sending and receiving ends of the carrier frequency difference exists, using digital phase-locked to achieve synchronization of sending and receiving end of the carrier, in the case of large frequency offset, frequency offset estimation of the size, adaptive set the loop bandwidth to achieve shorter acquisition time and better noise performance. The whole design is based on the company XILINX ISE development platform, and Virtex-II series with the FPGA. FPGA realization of a modem with a small size, low power consumption, high integration, software upgrades available, the characteristics of strong interference interference, in line with the future direction of ICT development.
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Size: 64512 |
Author: 马文 |
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Description: 实现信号处理中QAM调制、过信道、解调部分。其中QAM调制部分可改符号点数，M阶数，信道加高斯白噪声、时延、多径，调制解调均有星座图。通过本代码，可学习QAM调制解调，或者通信系统的知识。-To achieve QAM modulation, signal processing over channel, a demodulation section. QAM modulation section can be changed symbolic points M order channel additive white Gaussian noise, delay, multipath, the modem has constellation diagram. QAM modulation and demodulation, or communication system knowledge through this code, you can learn.
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Size: 1024 |
Author: Michael |
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Description: 采用M2M4信噪比估计算法对QPSK调制解调器的接收端信噪比进行了估计-M2M4 SNR estimation algorithm on the the QPSK modem receiving end signal-to-noise ratio estimated
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Size: 1024 |
Author: 薛敏迪 |
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Description: 构建一个理想信道基本QPSK仿真系统,仿真结果有
a.基带输入波形及其功率谱
b信号及其功率谱
c.QPSK信号星座图
2.构建一个在AWGN（高斯白噪声）信道条件下的QPSK仿真系统，仿真结果有
a.QPSK信号及其功率谱
b.QPSK信号星座图
c.高斯白噪声信道条件下的误码性能以及高斯白噪声的理论曲线，要求所有误码性能曲线在同一坐标比例下绘制-qpsk modem emulation, plus white Gaussian noise
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Size: 2048 |
Author: 赵小样 |
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Description: 对于已定义的包含从0到15的整数的列向量xsym，就可以利用modem.qammod对象的modulate方法来调制它。其中M值为16，亦即为码字表的大小。
对已调制信号可采用awgn函数添加加性高斯噪声。其中比特能量与噪声功率谱密度的比值，Eb/N0，设置为10dB。
-The method comprising modulate integer from column vectors xsym 0 through 15, can use the defined object modem.qammod modulating it. Wherein M is 16, i.e., a codeword size of the table. Modulated signal can be used for awgn function to add the additive Gaussian noise. Wherein the ratio of bit energy to noise power spectral density, Eb/N0, is set to 10dB.
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Size: 8192 |
Author: 任帅 |
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Description: 5、绘制散点图。
对发射和接收信号利用scatterplot函数可显示信号星座图的样子及噪声对信号造成的失真程度。在该图中，横轴代表了信号的同相分量而纵轴代表了正交分量。下面的代码还利用了
对接收信号利用modem.deqammod对象的demodulate方法进行解调。解调结果为包含0到15之间整数的列向量。
-5, draw a scatter plot. The transmitted and received signals can be displayed using a function of the degree of distortion scatterplot like and noise signals caused by the signal constellation of FIG. In this figure, the horizontal axis represents the in-phase component signal and the vertical axis represents the quadrature component. The following code is also used to demodulate the received signal using the method of demodulating modem.deqammod object. Demodulation result is an integer from 0 to 15 comprising a column vector.
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Size: 7168 |
Author: 任帅 |
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Description: 基于MSP430的FSK调制解调器,实现较容易, 抗噪声与抗衰减的性能较好, 在中
低速数据传输中得到了广泛的应用- The FSK modem based on MSP430 is easy to implement and has better performance of anti noise and anti attenuation.
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Size: 422912 |
Author: 侯静 |
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