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Synchronization_cpm
同步数据辅助的连续相位调制信号相干接收机(Synchronous data-aided continuous phase modulation signal coherent receiver)
- 2010-07-21 22:13:50下载
- 积分：1
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ARTnn
输入信号五个基于瞬时信息的特征：零中心归一化瞬时幅度功率谱密度的最大值,零中心归一化瞬时幅度绝对值的标准偏差，零中心非弱信号段瞬时相位非线性分量绝对值标准偏差，零中心非弱信号段瞬时相位非线性分量标准偏差，零中心归一化的非弱信号段瞬时频率绝对值的标准偏差，得到识别出的信号类别，本例为2PSK, 4PSK, GMSK, OQPSK, pi/4DQSK中的一个，还可以看Art网络的扩展性。(input signal instantaneous information on five characteristics : In the center is one of the instantaneous rate of the power spectral density of the maximum, is a center to the absolute value of the instantaneous rate of the standard deviation, Non-zero weak signal instantaneous phase of the nonlinear component absolute standard deviation, Non-zero weak signal instantaneous phase of the nonlinear component standard deviation, In the center is one of the non-weak signal of the absolute value of the instantaneous frequency standard deviation, the identification of signal type, The cases of two PSK, 4PSK, GMSK, OQPSK, pi/4DQSK of one, Art can be viewed network scalability.)
- 2007-04-06 09:47:27下载
- 积分：1
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03607_28
DFT进行频谱分析时的三种现象
1、混叠：对连续信号采样，要求连续信号是带限的，采样频率要足够高。Fs应满足Nyquist采样定理才不产生混叠。
采样前加低通滤波器防混叠
2、频谱泄漏：DFT对时域信号进行了截断（相当于采样信号乘了一个窗函数），时域的乘积相当于频域卷积，改变了原信号频谱。
改用其他窗函数（非矩形）改善泄漏。
3、栅栏现象：DFT 只给出了频谱在采样点上的取值，采样点间的频谱内容丢失。(DFT spectrum analysis of a three phenomena, aliasing : continuous signal sampling, requiring continuous signal is band-limited, the sampling frequency should be high enough. Fs meet the Nyquist Sampling Theorem would not have aliasing. Sampling former low-pass filter plus anti-aliasing 2, spectrum leakage : DFT right time domain signal a disconnect (equivalent to a sampling signal by a window function). time domain is equivalent to the product of frequency-domain convolution, changes in the spectrum of the original signal. Window functions to switch to other (non-rectangular) to improve leakage. 3, fenced phenomenon : DFT spectrum is given only at the sampling point value, sampling points of the spectrum as lost.)
- 2007-05-08 16:22:17下载
- 积分：1
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fractal
分形，是以非整数维形式充填空间的形态特征。分形可以说是来自于一种思维上的理论存在。(Fractal, is filling in the form of non-integer dimension of space morphology. Fractal can be said to come from the existence of a theory of thinking.)
- 2010-09-28 21:10:48下载
- 积分：1
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ST_Its_Application
非平稳信号时频分析中的S变换实现的例程及应用(Non-stationary signal analysis of time-frequency S transform realization and application of routine)
- 2007-11-24 11:03:52下载
- 积分：1
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Mie-scattering-Matlab
粒子散射光强的计算，可算粒子各个散射角的光强分布及其相位(The calculation of particle scattering intensity, scattering angle of each particle can be considered the light intensity distribution and phase)
- 2010-09-25 18:36:40下载
- 积分：1
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sumimoSimulationConfig
此源程序为MATLAB代码，是LTE平台链路级仿真中单用户MIMO的仿真设置(The source code for MATLAB is LTE link level simulation platform for single-user MIMO emulation settings)
- 2014-11-17 22:10:24下载
- 积分：1
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review
说明： 冈萨雷斯数字图像处理的一个review 简洁不错(a review of digital image processing)
- 2009-08-08 19:01:32下载
- 积分：1
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sar-simulation
星载SAR仿真 可以得到很好的成像效果，大家可以试一试(Simulation of spaceborne SAR imaging results can be very good, we can try)
- 2021-03-30 15:59:10下载
- 积分：1
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sudu
计算数独的好方法，能够快速解决问题，使用方便(Good way to calculate the number of independent, able to quickly solve the problem, easy to use)
- 2010-06-19 00:10:42下载
- 积分：1
