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m_PN
说明： 伪随机码或称PN码，是扩频通信中不可缺少的一种序列。扩频通信，简单的说来就是通过一组相关性很强的伪随机序列，使原有的信号按照伪随机序列的特性出现。从波形上看，原有信号完全淹没于随机的噪声中，达到隐藏信号和抗干扰的目的。接受方只要有相同的伪随机序列，就可以通过伪随机序列很强的相关性将信号还原出来。而m序列，是扩频系统中最长用的伪随机序列。下面的代码就是基于matlab的生成m序列的代码，通过改变初始多项式的值，就可以生成不同阶数的m序列。(Pseudo-random code or PN code, spread spectrum communication is indispensable to a sequence. Spread spectrum communication, a simple to say that the adoption of a group of highly related to pseudo-random sequence, so that the original signal in accordance with the characteristics of pseudo-random sequence there. From the wave point of view, the original signal completely submerged in the random noise to hide the purpose of signal and interference. As long as the recipient has the same pseudo-random sequence, the pseudo-random sequence can be a strong correlation to restore the signal out. And m sequence spread spectrum system is the longest of the pseudo-random sequence used. The following code is generated based on m sequences of matlab code, by changing the value of the initial polynomial, we can generate a different order of the m sequence.)
- 2009-08-10 22:39:52下载
- 积分：1
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Active-Filter-Cookbook(D.Lancaster)
有源滤波器设计经典书籍，作者D.Lancaster(Active-Filter Cookbook by D.Lancaster)
- 2012-08-20 21:21:32下载
- 积分：1
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perceptron
matlab下模式识别代码 感知机，最小二乘法(Under the pattern recognition code matlab)
- 2010-05-06 01:54:08下载
- 积分：1
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start
matlab仿真精华，关于三相异步电机起动的案例，很有用(the matlab simulation essence, in the case of three-phase asynchronous motor starter, useful)
- 2012-09-09 18:14:15下载
- 积分：1
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bpsk
BPSK调制 通信原理中的类容 BPSK (BPSK modulation)
- 2013-04-15 20:30:17下载
- 积分：1
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LDA算法
说明： 利用LDA算法，实现数据降维。输入样本数据、原维度数和目标维度数，输出降维后数据(Data Dimension Reduction Using LDA Algorithms)
- 2019-03-01 09:33:50下载
- 积分：1
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2008042021243274
非常好的资料，很难找到哦，不要错过了啊，错过就没有机会了(VERY GOOD DOCUMENT IF YOU DON T BELIEVE
ME, YOU CAN LOOK INSIGHT)
- 2009-11-09 19:06:09下载
- 积分：1
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31500385OSTBC_OFDM
在空时分组码的MIMO-OFDM系统条件下，对信道，子载波，比特和功率进行分配，仿真结果表明，系统有良好的吞吐量性能(Space-time block codes in MIMO-OFDM system under the conditions of the channel, subcarrier, bit, and power allocation, simulation results show that the throughput of the system has good performance)
- 2011-01-09 17:20:46下载
- 积分：1
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MATLAB-Input-and-Output-Functions
在MATLAB 编程中输入和输出函数的应用方法。(the output and input functions in MATLAB.)
- 2012-05-19 21:27:26下载
- 积分：1
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matlab shangzhi
利用熵值法判断某个指标的离散程度的。在信息论中，熵是对不确定性的一种度量。信息量越大，不确定性就越小，熵也就越小;信息量越小，不确定性越大，熵也越大。根据熵的特性，我们可以通过计算熵值来判断一个事件的随机性及无序程度，也可以用熵值来判断某个指标的离散程度，指标的离散程度越大，该指标对综合评价的影响越大。
因此，可根据各项指标的变异程度，利用信息熵这个工具，计算出各个指标的权重，为多指标综合评价提供依据。(Using entropy method to judge the degree of dispersion of a certain index.)
- 2018-07-23 11:27:50下载
- 积分：1
