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pn_code
产生PN序列码的源代码,里面有详细的注释!希望对有需要的朋友有用!(PN code sequence generated source code, which has detailed notes! Wish to have a friend in need useful!)
- 2008-05-21 19:19:58下载
- 积分:1
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Fischer-algorithm
误比特算法(Fischer algorithm for min BER)(Fischer algorithm for min BER)
- 2012-03-27 15:07:51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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power_voltmeasure
power_voltmeasure,matlab仿真文件,电力电子、功率电子控制方面很有价值,调试通过(aspects of power_voltmeasure, matlab simulation files, power electronics, power electronics control valuable debugging through)
- 2013-02-28 14:21:25下载
- 积分:1
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1
说明: 产生高斯白噪声,标准差和期望都固定,如N=f(0.1,2),这种形式的,随机产生40个(Generated white Gaussian noise, standard deviation and expectations are fixed, such as N = f (0.1,2), this form of randomly generated 40)
- 2009-07-04 14:31:32下载
- 积分:1
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Math
Mathematica教程,包含12个章节,叙述详细,可以满足基本需求(Mathematica tutorial contains 12 chapters, describes in detail, to meet basic needs)
- 2010-05-14 16:40:08下载
- 积分:1
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I_love_you
一个很有意思的小程序,可以用于向对方表白哦。(A very interesting small program that can be used to declare each other oh.)
- 2013-12-11 22:35:50下载
- 积分:1
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snake
活动轮廓模型也称蛇形,定义为最小的能量样条曲线(Active contour model, also known as snake, is defined as the minimal energy splines)
- 2011-06-30 17:39:17下载
- 积分:1
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fish-school-algorithm
基于鱼群算法的研究,matlab仿真和分析(Based on the study of fish school algorithm matlab simulation and analysis)
- 2012-07-19 16:47:47下载
- 积分:1
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Lyapunov
小数据量法求Lyapunov指数_龙格库塔(Small amount of data Lyapunov index _ method Runge-Kutta)
- 2009-01-09 16:33:54下载
- 积分:1