Description: 升余弦滚降系统的眼图和功率谱，滚降系数为0.5.发送码元取值为0、2.-Raised Cosine the eye and power spectrum, roll-off factor of 0.5. This code value for 0,2 billion. Platform: |
Size: 1024 |
Author:陈旭 |
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Description: matlab实现的多个基础程序和报告并有流程图（1） 绘出正弦信号波形及频谱。
（2） 单极性归零（RZ）波形及其功率谱，占空比为50％。
（3） 升余弦滚降波形的眼图及其功率谱。滚降系数为0.5。发送码元取值为0、2。
（4） 最佳基带系统的Pe~Eb\No曲线，升余弦滚降系数a=0.5，取样值的偏差是Ts/4。
（5） Pe~Eb\No，升余弦滚降系数a=0.5，取样时间无偏差，但信道是多径信道，C(f)=abs(1-0.5*exp(-j*2*pi*f*dt))，dt=Ts/2。
（6） 仿真数字基带传输系统，包括输入、输出信号波形及其功率谱，眼图（升余弦滚降系数a=0.5），Pe~Eb\No曲线，取样时间无偏差。
-matlab realize a number of the basis of procedures and reports and have flow chart (1) mapped sinusoidal signal waveform and spectrum. (2) unipolar return-to-zero (RZ) waveform and its power spectrum, 50 duty cycle. (3) Raised Cosine rolloff waveform eye diagram and power spectrum. Roll-off factor of 0.5. Send code values for the 0,2 million. (4) the best base-band system Pe ~ EbNo curve, raised cosine roll-off factor a = 0.5, sampling bias is the value of Ts/4. (5) Pe ~ EbNo, raised cosine roll-off factor a = 0.5, sampling time deviation, but the channel is a multipath channel, C (f) = abs (1-0.5* exp (-j* 2* pi* f* dt)), dt = Ts/2. (6) Simulation of digital baseband transmission system, including input and output signal waveforms and power spectrum, eye diagram (raised cosine roll-off factor a = 0.5), Pe ~ EbNo curve, sampling time deviations. Platform: |
Size: 311296 |
Author:dongming |
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Description: 升余弦滚降的源程序其对通信系统仿真有很大的用出-Raised cosine roll-off the source of its simulation of communication systems have a lot of use out of Platform: |
Size: 3072 |
Author:wwge |
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Description: 升余弦滚降的误码率和信噪比曲线，取样时间无偏差，但信道是多径信道，衰减系数0.5
傅立叶变换及反变换参见t2f-and-f2t-Raised cosine roll-off of the bit error rate and signal to noise ratio curve, sampling time deviation, but the channel is a multipath channel, the attenuation coefficient of 0.5 Fourier Transform and inverse transform see t2f-and-f2t Platform: |
Size: 1024 |
Author:刘临政 |
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Description: 最佳升余弦滚降系统的实现及其误码率，比较适合初学者学习，可以更好的理解matlab的编程及其使用-Raised cosine roll-off the best system and the bit error rate, more suitable for beginners to learn, you can better understand the programming and the use of matlab Platform: |
Size: 1024 |
Author:zhangwei |
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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，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，计算误比特率。-First, this program uses 16QAM modulation mode, for a string of two binary source is modulated with a raised cosine roll-off function for base-band modulation, and then transferred to high-frequency channel in the channel by adding Gaussian white noise, the use of matched filter device demodulator, draw demodulation constellation, using the minimum Euclidean distance decoding decision, calculate bit error rate. Platform: |
Size: 107520 |
Author:zhaoyang |
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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: base_band.rar文件解压后可以在matlab平台直接编译运行，实现通信系统的升余弦基带
成型处理，码元速率，采样率、滚降系数都可以灵活设置，特别方便学习通信的同学加深对基带信号的理解。-base_band.rar unzip the files can directly compile and run matlab platform to achieve communication system raised cosine baseband shaping processing, chip rate, sample rate, roll-off factor can be set flexibly, in particular, to facilitate students to learn to communicate better to the base band signal understanding. Platform: |
Size: 1024 |
Author:lijunke |
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Description: 用于BPSK调制的自行设计，说明如下：
1.matlab.txt中的程序是matlab平台下的.mat格式。目的是输出一个64*4的矩阵，矩阵的每个元素都为0~255间的整数。矩阵每行的四个数是一个码元的四个抽样点的量化值。但由于当前码元通过升余弦滤波系统时，受到前后共6个码元的共同影响，所以是由6个码元共同决定。这6个码元是随机的，可能是0也可能是1（双极性时可能是-1也可能是+1），故6个码元共2^6=64种情况，所以产生的矩阵是64*4。最后逐行输出这256个数。
2.BPSK3中程序的目的是：将m序列通过滚降系数为0.3的升余弦滤波系统后的信号采样输出。
3.BPSK5中程序的目的是：将m序列通过滚降系数为0.5的升余弦滤波系统后的信号采样输出。
4.以上两个程序的运行平台为Quartus（verilog语言）。-BPSK modulation is used to design, as follows:
1.matlab.txt the program is under matlab platform. Mat format. Purpose is to output a 64* 4 matrix, each element is an integer between 0 and 255. Matrix of each line is a symbol of four the number of sampling points of the four quantitative value. However, due to the current symbol by raised cosine filtering system, before and after a total of six yards by the combined effect of element, it is shared by the six yards per decision. The 6 symbol is random, may be 0 may be 1 (may be bipolar may be+1-1), so a total of six yards per 2 ^ 6 = 64 kinds of situations, so the resulting matrix 64* 4. Finally, the number of progressive output of the 256.
2.BPSK3 purposes of the procedure is: m sequence of roll-off factor of 0.3 by the raised cosine filter system output after the signal sampling.
3.BPSK5 purposes of the procedure is: m sequence of roll-off factor of 0.5 by the raised cosine filter system output after the signal sampling.
Platform: |
Size: 4096 |
Author: |
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Description: 采用MATLAB编程，产生一个16QAM基带信号，并进行实数倍插值计算。要求符号率为1 MSymbol/s，采用均方根升余弦滤波成形，滚降系数=0.5。产生{…1，0，1，1，…}的伪随机序列，经过映射、4倍成形滤波、FIR半带滤波、实数倍内插滤波，最后输出4.315倍时域/频域响应。给出信号序列经过各级滤波的时域、频域结果-Using MATLAB programming, resulting in a 16QAM baseband signal, and the real multiples of the interpolation calculation. The requirements of symbol rate 1 MSymbol/s, the root mean square raised cosine filter shape, roll-off factor = 0.5. Generate {1,0,1,1, ...} of the pseudo-random sequence, mapping, four times the shaping filter, FIR half-band filter, in fact, several times interpolation filter, the final output of 4.315 times the time domain/frequency domain response. Given the signal sequence through all levels of filtering the time domain, frequency domain results Platform: |
Size: 239616 |
Author: |
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Description: BPSK与QPSK调制解调系统的Matlab仿真程序；
发送滤波器与接收滤波器均为根升余弦滚降滤波器；
信道噪声为加性高斯白噪声；
绘制BPSK与QPSK调制下的误码率与信噪比曲线图，并与理论曲线进行对比。
-BPSK and QPSK modulation and demodulation systems Matlab simulation program transmit and receive filters are root raised cosine filter roll-off filter channel noise is additive white Gaussian noise draw BER BPSK and QPSK modulation with a letter under noise ratio graph and compare with the theoretical curve. Platform: |
Size: 2048 |
Author:WatcherVC |
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Description: 仿真高斯白噪声信道下QPSK的Eb/N0与误比特率之间的关系。
要求：
任选一种工具进行仿真：SPW、Matlab、Simulink。
成型滤波器采用根升余弦滚降滤波器，滚降系数为0.5，过采样因子为4
要求仿真至1e-5误比特率 。
与理论值对比，绘出对比曲线-Simulation of Gauss white noise channel QPSK between Eb/N0 and bit error rate of the relationship.
Requirement.
Optionally, a tool for simulation: SPW, Matlab, Simulink.
Shaping filter using the root raised cosine filter, roll off factor of 0.5, over sampling factor of 4
Requirements of simulation to 1e-5 bit error rate.
Compared with the theoretical value, draw the contrast curve Platform: |
Size: 1024 |
Author:李硕 |
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Description: 用matlab实现升余弦滤波器的设计，其中滚降系数可以根据自己需要自动调节-Using matlab to achieve raised cosine filter design, roll-off factor which can automatically adjust according to their needs Platform: |
Size: 1024 |
Author:张亮 |
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Description: frequency expander. Matlab code for expander.When x is a vector, this function adds L-1 after each element of x.
When x is a matrix, each column of it treated as vector and expanded L
fold.
SQUARE-ROOT RAISED-COSINE PULSE: h=sr_cos_p(N,L,alpha)
This function generates a square-root raised-cosine pulse of length N+1.
There are L samples per symbol period.
alpha is the roll-off factor. Platform: |
Size: 1024 |
Author:kris |
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Description: 升余弦滚降滤波器，滤波器，并有不同系数下对比图(Raised cosine roll off filter, filter, and comparison chart under different coefficients) Platform: |
Size: 1024 |
Author:AMIEO |
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Search - raised cosine roll off matlab