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LDPC
采用LDPC编码对随机的二进制序列进行纠错编码和基带调制,在AWGN信道上进行传输,然后在接收端并采用合适的方式进行解调和译码,最后对纠错编码的性能加以分析。(LDPC codes using random binary sequence of error-correcting coding and base-band modulation, for transmission in the AWGN channel, and then at the receiving end and use the appropriate manner demodulation and decoding, error correction coding on the performance of the final analysis.)
- 2009-12-29 17:59:49下载
- 积分:1
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MATLAB
一、 牛顿-拉夫逊法概要
首先对一般的牛顿-拉夫逊法作一简单说明。已知一个变量X的函数
(4-6)
解此方程式时,由适当的近似值X(0)出发,根据 (4-7)
反复进行计算,当X(n)满足适当的收敛判定条件时就是(4-6)式的根。这样的方法就是所谓的牛顿-拉夫逊法。
式(4-7)就是取第n次近似解X(n)在曲线 上的点 处的切线与X轴的交点作下一次X(n+1)值的方法。参考图4-2(a)。在这一方法中为了能收敛于真解,初值X(0)的选取及函数f(X)必须满足适当的条件,如图4-2(b)所示的那种情况就不能收敛或收敛到别的根上去。
这一方法还可以做下面的解释,设第n次迭代得到的解与真值之差,即 的误差为 时,则
(4-8)
把 在 附近对 用泰勒级数展开
(4-9)
上式略去 以下的项
(4-10)
的误差可近似由上式计算出来
图4-2
(4-11)
比较式(4-7)和(4-11),可以看出牛顿-拉夫逊法的修正量和 的误差的一次项相等。
用同样的方法考虑,给出对n个变量 (:Because of the importance and complexity of power system, better algorithm and programme language
is very important . An interior point method based on the perturbed Karush2Kuhn2Tucker (KKT) condition is pre2
sented in this paper , where the method and process for the optimal power flow is treated through the Matlab’s
symbolic math toolbox and Mfunction is also presented. Using the symbolic code , it can improve the adaptability
of the programme dramatically. The advantage is that , what we need to do is change the model expression. We
can make use of the symbolic programme to check our programme while we write the Mfunctions. Using the Mat2
lab , we find the optimal solutions and calculate quickly and efficiently. It has proposed the powerful and unique
functions of Matlab in the optimization and calculation for power system.
Key words :power system symbolic calculation optimal power flow interior point method)
- 2020-07-08 16:38:56下载
- 积分:1
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fdtd2d_7005
code about fdtd gooood
- 2011-07-14 14:53:07下载
- 积分:1
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runge
说明: runge现象的matlab仿真,用于数值分析(phenomenon of runge, simulated via matlab, for mathmatical analysis)
- 2009-08-25 10:44:05下载
- 积分:1
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f
说明: it is matlab source code implemeted in Matlab 7.6.
this is utilized in matlab.
- 2011-05-21 16:49:01下载
- 积分:1
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Turbo
实验了3gpp要求的1/3码率的编译码算法(3gpp test the requirement of 1/3 code rate encoding and decoding algorithms)
- 2011-09-25 13:11:44下载
- 积分:1
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pll1
数字锁相环matlab编程代码,适用于初学者进行参考,欢迎大家下载!(Digital phase-locked loop matlab programming code, suitable for beginners reference, welcome to download)
- 2020-06-28 21:00:02下载
- 积分:1
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FractalFilter
基于模糊自动控制的分形滤波算法。通过计算分形维数选定滤波器实现自适应滤波去噪。(Automatic control based on fuzzy fractal filtering algorithm. By calculating the fractal dimension , select adaptive filter to achieve de-noising .)
- 2009-04-20 08:56:53下载
- 积分:1
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ialm
不精确拉格朗日法,求解矩阵补全的凸优化问题,可以用该方法实现背景建模(Imprecise Lagrangian method for solving matrix completion convex optimization problem, you can use this method, background modeling)
- 2014-05-31 06:50:39下载
- 积分:1
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ADRC Demo for 1st and 2nd order plants
自抗扰一阶和二阶ESO模型,清晰的ESO一阶和二阶siumlink程序图,添加相应的处理信号可以直接使用。(ADRC Demo for 1st and 2nd order plants)
- 2021-03-26 15:59:13下载
- 积分:1