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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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dnwx
主板故障的确定，一般通过逐步拔除或替换主板所连接的板卡（内存、显卡等），先排除这些配件可能出现的问题后就可以把目标锁定在主板上(Motherboard fault is fixed, or replace the motherboard through the gradual removal of the connected board (memory, graphics, etc.), first rule out possible problems of these accessories can be targeted after the motherboard)
- 2010-05-11 21:34:38下载
- 积分：1
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Hilbert-Huang-Transform
信号的希尔伯特-黄变换，IMF分解，对IMF进行Hilbert处理，绘制二维/三维时-频图，时间-能量图(瞬时能量谱) ，频率-能量图（希尔伯特谱）(Hilbert signals- Huang Transform, IMF decomposition of the IMF Hilbert processing, rendering 2D/3D time- frequency diagram, time- energy (instantaneous energy spectrum), the frequency- energy (Hilbert spectrum))
- 2021-04-25 22:18:46下载
- 积分：1
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life
:元胞自动机不仅是理论计算机科学领域的一个重要的计算模型,而且可视为一无限维的离散动力系统,被广泛应用于
自然科学和社会科学各领域的复杂性的研究中,是一个重要的研究方法和工具。该文以Matlab 为开发工具,开发了元胞自
动机的可视模型,为其在各个领域的复杂性研究提供了一个简易、可行的计算机仿真工具(MATLAB s version of Conway s Game of Life.
"Life" is a cellular automaton invented by John
Conway that involves live and dead cells in a
rectangular, two-dimensional universe. In MATLAB, the universe is a sparse matrix that is initially all zero.
Whether cells stay alive, die, or nerate new cells depends upon how many of their eight
possible neighbors are alive. By using sparse matrices, the calculations required become astonishingly simple. We use periodic (torus) boundary conditions at the edges of the
universe. Pressing the "Start" button
automatically seeds this universe with several small random communities. Some will succeed and some will fail. )
- 2012-04-07 17:12:38下载
- 积分：1
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key70
matlab针对股指期货的分笔数据做的交易策略(matlab trading system for index futures)
- 2013-09-04 10:05:46下载
- 积分：1
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LMS
自适应最小均方算法，应证实是正确的。可以下载使用(Adaptive least mean square algorithm, should prove to be correct.)
- 2009-12-14 03:26:27下载
- 积分：1
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QPSK-AWGN
this is simmulation QPSK modulation in AWGN channel
- 2009-12-18 01:51:34下载
- 积分：1
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downup
直流降压升压变换器 用于对输入电压的升高或者降低 (DC buck-boost converter is used to raise or lower the input voltage)
- 2011-10-11 13:55:49下载
- 积分：1
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suspensionSimulink
汽车四分之一悬架模型建模与仿真，simulink(Car Modeling and Simulation fourth suspension)
- 2014-01-12 15:26:24下载
- 积分：1
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Desktop
二维插值的应用。二维插值主要应用于图像处理和数据的可视话。主要方法有：最邻近插值；双线形插值；三次样条插值等方法。该源码可以看出其中区别。(Application of two-dimensional interpolation. Two-dimensional interpolation is mainly used in image processing and visualization of data words. Main methods are: the nearest interpolation double linear interpolation cubic spline interpolation and other methods. The source can be seen the difference between them.)
- 2020-09-18 12:07:58下载
- 积分：1
