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ptm
基于matlab环境下的磷酸化鉴定系统的实现。(Based on the Matlab environment phosphorylation identification system implementations.)
- 2012-12-29 00:11:01下载
- 积分：1
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Person-Identification-Using-Ear-Biometrics
Person Identification Using Ear Biometrics
- 2013-10-21 18:06:14下载
- 积分：1
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f11
detection of ROI on a binary image....
- 2010-11-25 08:05:31下载
- 积分：1
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With-cross-factor-particle-swarm
一种智能优化算法-带交叉因子的粒子群优化算法(With cross factor particle swarm)
- 2013-09-01 17:35:13下载
- 积分：1
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forwardselection
foeward featurrselection
- 2009-09-07 20:10:29下载
- 积分：1
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frft
分数阶傅里叶变换,用于处理信号的一种工具。(Fractional Fourier Transform)
- 2021-04-05 10:59:03下载
- 积分：1
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Gauss_lengend_pi
数值分析算法-----复化三点Gauss-lengend公式求pi (Numerical analysis algorithms----- complex formula of three-point Gauss-lengend find pi)
- 2011-07-07 17:27:00下载
- 积分：1
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fangzhen
实验一 双极性矩形随机信号的归一化功率谱密度一
1.1 功率谱密度简介
平稳过程的任何一个非零样本函数的持续时间为无限长，显然都不满足绝对可积和总能量有限的条件。因此，它的傅里叶变换不存在即没有频谱函数。所以我们用功率谱密度来表述其频谱特性。
随机过程的任一实现是一个确定的功率型信号。而对于任意的确定功率信号f(t)，它的功率谱密度为：
式中， 是f(t)的截短函数 对应的频谱函数。f(t)是平稳随机过程 的一个实现。而随机过程某一个实现的功率谱密度不能作为过程的功率谱密度。过程的功率谱密度应该看作是任一实现的功率谱密度的统计平均，即
虽然该式给出了平稳随机过程的功率谱密度，但我们通常都不利用这个式子来计算功率谱。我们知道，确知的非周期功率信号的自相关函数与功率谱密度是一对傅里叶变换。对于平稳随机过程，也有类似的关系，即
和
对于平稳随机过程我们通常先求出其自相关函数再利用上式求出其功率谱密度。
1.2 实验要求
1.了解平稳随机信号功率谱的概念及计算方法
2.仿真不同占空比，等概、非等概双极性矩形随机信号的归一化功率谱密度
3.分析不同信号所包含的频谱分量，有无直流分量和定时分量信息
(A pair of rectangular random experiment polarity signal sample return a nonzero function of any duration power spectral density of a 1.1 power spectral density of a stationary process Introduction of infinite length, apparently not satisfied absolutely integrable and the total energy of the limited conditions. Therefore, it is the Fourier transform of the spectrum that does not function does not exist. Therefore, we use the power spectral density to express their spectral characteristics. Any random process is a realization of a certain type signal power. For arbitrarily determined power signal f (t), its power spectral density is: wherein, is f (t) is a function corresponding to the truncated spectrum function. f (t) is a stationary random process of realization. The random process to achieve a certain power spectral density can not serve as the power spectral density of the process. Power spectral density process should be seen as a statistical average power spectral density of any r)
- 2014-11-30 20:39:29下载
- 积分：1
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QPSKpassAWGN
发送装置：随机信号产生、脉冲成型（上采样可调，滚降可调）；
发送：AWGN信道（信噪比范围可调）
接收设备：QPSK调制解调 ，匹配滤波，判决
画出接收信号的眼图、星座图；计算误码率并与理论值比较。
(Transmitting device: random signal generator, pulse shaping (the sampling adjustable, adjustable roll-off)
Send: AWGN channel (SNR range is adjustable)
Receiving equipment: QPSK modulation and demodulation, matched filtering, judgment
BER is calculated and compared with the theoretical value draw the received signal eye diagram, constellation.)
- 2020-11-30 16:09:27下载
- 积分：1
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mlmethod
OFDM基于循环前缀的最大似然同步算法，通俗易懂，适合初学者(ML algorithm)
- 2021-04-10 14:58:59下载
- 积分：1
