Description: p-持续CSMA协议下，一个用户在发送之前，先侦听信道，若是空闲，就以概率p发送出去，而以q =1-p的概率推迟到下一帧时。如果下一帧时仍是空闲，便再次以概率p发送而以q推迟到再下一帧时。直到发送成功或另外一用户开始发送时为止。若一开始就侦听到信道忙，它就等到下一帧时，然后再开始上述过程。若发生冲突，这等待一随机时间后重新开始。本实验中取q值为0.5。求的是0.5-持续CSMA。
-p-persistent CSMA agreement, a user before sending the first interception channel, if idle, with probability p sent, and to q = 1-p probability postponed to the next frames. If the next frame was still idle, they again sent with probability p and q to further postponed to the next frames. Until this a success or other users at the beginning of this date. If an interception at the start of the busy channel, it will wait till the next frames, and then begin the process. If conflict breaks out, waiting for a random period of time after the re-start. The experiments take q value of 0.5. For the 0.5-sustained CSMA. Platform: |
Size: 55296 |
Author:fang |
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Description: 此文件包括jake信道仿真模型的过程程序，希望大家发表意见-Anonymous channel simulation model of the procedure, hoping to express their opinions Platform: |
Size: 1024 |
Author:yy |
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Description:
无线通信系统中在rayleigh衰落信道下的matlab仿真源程序-wireless communication system in rayleigh fading channel simulation source of Matlab Platform: |
Size: 1024 |
Author:powerzhou |
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Description: cost231信道模型，做通信仿真都知道还是很有用的-cost231 channel model, simulation of communication to do all know that it is useful for Platform: |
Size: 4096 |
Author: |
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Description: 这里面有两个程序，两个都是采用4QAM调制。不过个人觉得第一个更容易懂，因为写的很有条理。我改的那个程序就是根据这个来的。
不过在这里面有个问题就是信道系数只能是由高到低，大家可以试试，改成[0.227 0.46 0.688 0.46 0.227]这个是老师给我的仿真中常用的信道系数，这个成为归一化信道，就是系数平方和为1.
第二个程序没有涉及到信道系数，但是这个程序当中，在128个子载波中，前后有32个空载波，这个在OFDM中也是经常用的，这样可以降低误码率。
-There are two procedures, both of them are used 4QAM modulation. But personally feel that a more easily understood, since they were written very structured. I changed that procedure is on the basis of the past. But in this there is a problem inside the channel coefficient is the only high to low, everyone can try, replaced by [0.227 0.46 0.688 0.46 0.227] This is the teacher for giving me frequently used in the simulation of channel coefficients, this has become normalized channel is the coefficient of the square and 1. The second procedure does not involve channel coefficient, but this process which, in the 128 sub-carrier, the before and after the air carrier has 32, this in OFDM is also frequently used, as this will reduce the misuse of rate. Platform: |
Size: 19456 |
Author:徐振华 |
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Description: matlab在通信原理中的应用，信道编码BCH码仿真，希望大家能用得上！-matlab in Communication Theory in the application of channel coding BCH code simulation, hope that we can useful! Platform: |
Size: 2048 |
Author:侯雪 |
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Description: 对多径信道的仿真
输入码元,是一行矩阵,可以是实数也可以是复数
％fs是输入码元的比特率
％fd是多普勒频移
％n_delay是多径信道的径数
％t_delay是多径信道各径的时延时间
％p_delay是多径信道各径的功率db值
-Of the multipath channel simulation input symbol is a line matrix, can be a real number can also be plural fs is the input symbol of the bit rate fd is the Doppler frequency shift is n_delay multipath channel diameter of a few t_delay is multipath channel time delay of the Path p_delay is multi-path channel the power of the diameter db value Platform: |
Size: 4096 |
Author:李洁 |
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Description: GSM的仿真源码,比较详细,分为模块和全信道两部分-Simulation GSM source, more detailed, divided into modules and the entire channel in two parts Platform: |
Size: 14336 |
Author:林森 |
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Description: 超宽带中，基于MB-OFDM的信道估计的MATLABA仿真程序-UWB based on MB-OFDM channel estimation MATLABA the simulation program Platform: |
Size: 13312 |
Author:小范308 |
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Description: QPSK调制下在AWGN和Rayleigh衰落信道下的仿真以及误码率计算，包含完整的报告说明-QPSK modulation in AWGN and Rayleigh fading channel simulation, as well as bit error rate calculation, the report contains a complete description Platform: |
Size: 611328 |
Author:chengbin |
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Description: 模拟cmmb系统中ldpc译码的部分，仿真白高斯噪声信道下的部分-Analog CMMB system LDPC decoding part, the simulation of white Gaussian noise channel under the part of Platform: |
Size: 4957184 |
Author:丁丁 |
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Description: 3 MATLAB functions for simulation of OFDM signal in Rayleigh fading channel. Including models for OFDM frame generating, cyclic prefix, pramble, as well as model for Rayleigh channel, QAM modulation function and a example of test process. Platform: |
Size: 2048 |
Author:orange_jhy |
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Description: OFDM信号瑞利衰落信道的matlab仿真代码，,包括一个word文档和仿真程序。-OFDM signals in Rayleigh fading channel simulation matlab code, including a word document and simulation program. Platform: |
Size: 10240 |
Author:魏琴 |
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Description: 瑞丽信道仿真
噪声信号由MATLAB函数randn(1,N)产生，它从均值为0、方差为1的正态分布中产生N个伪随机数。每次迭代时，要使用相应的标准差对噪声的幅度进行尺度变换，最后，将输入信号和噪声信号相加得到输出信号。-Ruili channel simulation noise signal by the MATLAB function randn (1, N) generated, which from the mean 0, variance for a normal distribution N generate a pseudo-random numbers. Each iteration, it is necessary to use the corresponding standard deviation of the noise amplitude scaling, finally, the input signal and the noise signal to be added to the output signal. Platform: |
Size: 1024 |
Author:eunice |
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