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qpsk
摘 要:根据HFC网络上行信道的特性,建立了信道模型 分析了上行信道中存在的各种噪声对QPSK
调制技术的影响。结果表明在C /N (传输信道载噪比)较低的情况下,采用QPSK调制方式,可以提高系
统的抗干扰能力。
关键词: QPSK 光纤同轴电缆混合网 上行信道 噪声(Abstract: HFC network in accordance with the characteristics of the uplink channel, the establishment of a channel model an analysis of the various uplink channel noise on the impact of QPSK modulation. The results show that the C/N (transmission channel carrier-to-noise ratio) lower, the use of QPSK modulation, can improve the system of anti-interference ability. Keywords: QPSK hybrid fiber coaxial cable network uplink channel noise)
- 2009-04-12 15:45:03下载
- 积分:1
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ini-square
此算法描写了如何选择初始轮廓的位置,以及怎样控制初始轮廓的演化。(This algorithm describes how to select the location of the initial profile, and how to control the evolution of the initial contour.)
- 2010-12-21 10:17:30下载
- 积分:1
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PID-controller
先进PID控制matlab仿真,对PID的仿真有很大帮助,内含好多源代码(Advanced PID control matlab simulation , PID simulation , containing a lot of source code
)
- 2012-03-27 16:32:51下载
- 积分:1
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Survey-of-Model-Based
基于模型的风力发电机资料,有需要的学习一下吧(Model-based wind turbine data, there is a need to learn about it)
- 2013-07-14 20:12:39下载
- 积分:1
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Matlab_Piano
A basic example of piano in Matlab
- 2010-05-18 20:05:41下载
- 积分:1
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Dhakshinamoorthy_22.3.13
hi this is the code for svd in ieee 14 bus system
- 2013-03-24 11:02:56下载
- 积分:1
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Reservoi-with-PSO
Reservoir Optimization with PSO
- 2015-03-04 18:04:31下载
- 积分:1
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xiashan
MATLAB 牛顿下山法的一个小程序,原理就不详细说了。因牛顿迭代法受初值选取的限制,为防止迭代发散,对迭代过程再附加一项要求:|f(x(k+1))|<|f(x(k))|,将牛顿法迭代的结果:x(k+1) =x(k)-f(x(k))/f (x(k))和前一近似值x(k)适当加权平均做为新的改进值:x(k+1)=u*x(k+1) +(1-u)*x(k),其中u(0<>
迭代时u取1开始,逐次减半计算,直至附加要求符合为止。实例计算中x(k)=x(0)不变,只更新u和x(k+1),直至:|f(x(k+1))|<|f(x(k))|(即|f(x(1))|<|f(x(0))|),然后更新下山因子为u=1,继续以牛顿法迭代。(MATLAB Newton-down a small program, the principle is not explained in detail. Newton iteration by the initial value of the selected limit, in order to prevent additional iterative divergence, the iterative process a request: | f (x (k+1)) | < | f (x (k)) | Newton iteration Results: x (k+1) ' = X (k)-f (x (k))/f' (x (k)) and a previous approximation x (k), appropriately weighted average as a new improved value: x (k+1 ) = u* x (k+1) ' + (1-u)* x (k), where u (0 < u> iteration take successive calculated at 50 until the additional requirements found so far. examples of calculation of X ( k) = x (0) unchanged profile u and x (k+1, hungry) until: | f (x (k+1)) | < | f (x (k)) | (i.e. | f (x (1)) | < | f (x (0)) |), then profile downhill factor for u = 1, to continue to Newton iteration.)
- 2013-05-15 08:52:09下载
- 积分:1
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1-s2.0-S014206151500099X-main
simulation dfig in matlab
- 2016-08-15 16:16:29下载
- 积分:1
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层次分析法matlab程序及说明书
说明: 层次分析法matlab程序及说明书,是指将与决策总是有关的元素分解成目标、准则、方案等层次,在此基础之上进行定性和定量分析的决策方法。(Analytic hierarchy process (AHP) matlab program and specification is a decision-making method that decomposes the elements related to decision-making into objectives, criteria, schemes and other levels, and carries out qualitative and quantitative analysis on this basis.)
- 2020-10-17 14:43:43下载
- 积分:1