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rf
说明： 跳频是按跳频序列随机改变一个信道所占有频道频率的技术。在GSM 系统中，可利用跳频技术频率分极和干扰分极的特点，改善网络质量。引入跳频技术，可保证在网络软拥塞不上升的情况下，频率复用度较小。(FH frequency hopping sequence is based on a random channel change in the country channel frequency technology. In the GSM system, can make use of frequency hopping technology sub-polar and polar characteristics of interference and improve network quality. The introduction of frequency-hopping technology to ensure that congestion in the network does not increase in the soft case, a smaller frequency reuse moment.)
- 2009-05-12 19:44:55下载
- 积分：1
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xiaobosoundsignal
对原始图像在水平方向和垂直方向与2个滤波器(低通、高通)相卷积，可以得到4块面积为原图像1/4的子图，分别为水平方向低频和垂直方向低频(HH)、水平方向低频和垂直方向高频(HG)、水平方向高频和垂直方向低频(GH)、水平方向高频和垂直方向高频(GG)。(The original image in the horizontal direction and vertical direction and two filters (low pass, high pass) with convolution, you can get the original image area of 4 1/4 graph, respectively, horizontal and vertical direction low frequency ( HH), horizontal and vertical high-frequency low-frequency (HG), horizontal and vertical high-frequency low-frequency (GH), horizontal and vertical high-frequency high-frequency (GG).)
- 2010-05-22 11:59:43下载
- 积分：1
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Analysis-of-Dynamic-Spectrum-
一个关于认知无线电方面的PDF文档，对学习MIMO和认知无线电的人有帮助。(A cognitive radio about the PDF document to the study of MIMO and cognitive radio people have help.)
- 2012-05-10 21:28:00下载
- 积分：1
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fig7x40
永磁同步电机变频调速系统仿真，利用matlab仿真不报错(Permanent magnet synchronous motor speed regulation system simulation using matlab simulation without error)
- 2011-11-15 23:28:58下载
- 积分：1
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Wavelength-modulation-1
介绍半导体激光器波长调制与频率调制技术的文章(Wavelength modulation absorption spectrometry
an extensive scrutiny of the generation of signals)
- 2011-01-21 10:45:13下载
- 积分：1
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baiguangganshe
实现白光多缝衍射和双缝干涉，得到白光彩色的干涉条纹(Realization of white multi-slit diffraction and double-slit interference fringes get white color)
- 2013-10-31 11:53:45下载
- 积分：1
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CIE_MATLAB
MATLAB程序用于读取CIE图片，CIE坐标转换为图片坐标，在图中添加CIE 颜色点(MATLAB program used to read CIE pictures, CIE coordinates transform for image coordinates, CIE color is added in the figure)
- 2014-09-02 17:46:53下载
- 积分：1
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CSU-MATLAB-REPORT
中南大学信息院matlab实验报告
差分方程的脉冲响应，滤波器设计(failed to translate)
- 2011-10-23 21:10:56下载
- 积分：1
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e2qaq2e
用欧拉角表示的飞行器姿态运动学方程在大角度时会出现奇异现象,而采用四元数来
表示,则可以避免这个问题。因此,飞行器运动学方程都采用四元数来表示。而飞行器的控
制规律都采用欧拉角来表示,且欧拉角表示姿态角比起四元数更加形象,更易于被人理解,
所以,在飞行器控制系统仿真设计的时候,需要四元数与欧拉角之间的转换。给定1 个欧拉
角,对应1 个四元数,因而欧拉角到四元数之间这种一一对应的关系使得欧拉角到四元数的
转换比较容易。但是,1 个四元数通常有1 个或者2 个欧拉角与之对应,它们之间不是一一
的对应关系,因而,四元数到欧拉角之间的转换比较困难。一般文献或者参考资料上的转换
仅仅适于欧拉角在- 90°～ + 90°之间的情况[1 ] 。文献[ 2 ,3 ]中给出了滚动轴在- 90°～ + 90°
之间变化,俯仰轴、偏航轴在- 180°～ + 180°之间变化的四元数到欧拉角的转换公式。本文
提出了滚动、俯仰和偏航3 个轴的欧拉角均在- 180°～ + 180°之间取值的全角度转换算法,
经过数字仿真证实,这个算法是完全正确的、而且很实用。(Euler angles of the spacecraft attitude kinematics equation at large angles appear strange phenomenon, and quaternion
, You can avoid this problem. Therefore, the aircraft kinematic equations using quaternion to represent. Aircraft control
The system of law Euler angles and Euler angles attitude angle than the the quaternion more image easier to be understood,
Therefore, in the design of aircraft control system simulation, you need to convert between quaternions and Euler angles. Given an Euler
Angle corresponding to a quaternion, which this one-to-one relationship between the Euler angles to quaternion makes Euler angles to quaternion
Conversion is relatively easy. However, a quaternion usually have one or two corresponding Euler angles between them than eleven
The correspondence relationship, therefore, the quaternion to convert between the Euler angle is relatively difficult. General literature or reference conversion
Only suitable for Euler angles- 90 ° to+ 90 ° betwe)
- 2013-05-10 22:42:47下载
- 积分：1
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xianzai
用matlab 实现功能界面 3种主功能(Matlab interface to achieve functionality with three kinds of features)
- 2009-06-22 21:33:39下载
- 积分：1
