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8-optimal_in_FRFTdomains
time-invariant degradation models and stationary
signals and noise, the classical Fourier domain Wiener
filter, which can be implemented in O(N logN) time, gives the
minimum mean-square-error estimate of the original undistorted
signal. For time-varying degradations and nonstationary processes,
however, the optimal linear estimate requires O(N2) time
for implementation. We consider filtering in fractional Fourier
domains, which enables significant reduction of the error compared
with ordinary Fourier domain filtering for certain types
of degradation and noise (especially of chirped nature), while
requiring only O(N logN) implementation time. Thus, improved
performance is achieved at no additional cost. Expressions for
the optimal filter functions in fractional domains are derived,
and several illustrative examples are given in which significant
reduction of the error (by a factor of 50) is obtained.
- 2015-02-21 10:15:13下载
- 积分：1
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simulink_course
16qam的几种实现方法，对于初学者可能有用，MATLAB环境。(Several 16qam implementation method may be useful for beginners, MATLAB environment.)
- 2009-04-23 10:14:46下载
- 积分：1
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spiralmatrix
外螺旋矩阵的递归和非递归C编程方法 笔试中经常出现的题(Spiral Matrix outside the recursive and non recursive methods written in C programming problems often appear in)
- 2010-11-26 10:30:53下载
- 积分：1
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trapint
函数名称：matlab求积分函数。函数功能：该函数需要输入自变量，函数，积分下限，积分上限。非常方便。(Function name: matlab for integral function function: this function need to enter the independent variable, function, integral floor, integral upper limit is very convenient.
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- 2012-05-03 20:59:28下载
- 积分：1
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Watermarking
this program water mark a sound in picture with GUI based on haar transfrom
- 2013-08-25 17:05:37下载
- 积分：1
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huiseTguanliandu
各种灰色T型关联度代码，修正的T型关联度，改进的T型关联度,邓氏关联度，绝对关联度，相对关联度等。非常方便！(Various gray T-correlation code, modified T-correlation, improved T-correlation, Tangs correlation, absolute degree, associate degree relative. Very convenient!)
- 2013-09-09 14:57:13下载
- 积分：1
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cc
说明： description about linear convution
- 2015-01-18 21:41:18下载
- 积分：1
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chengxu
在无线通信体系中,由于开放的通信信道条件,卫星通信系统中通信链路容易受到平均大气条件的影响,尤其是采用Ka波段的高频信号的系统,容易受到降雨造成的雨衰影响,严重影响了系统的有效性和可靠性。(In a wireless communication system, the communication channel open, average atmospheric conditions vulnerable to the communication link in satellite communication system, especially the system of high frequency signal using Ka band, vulnerable to the influence of rain attenuation caused by rainfall, seriously affect the validity and reliability of the system. In digital systems, channel coding is often used to improve reliability, while modulation is used to ensure effectiveness. Low order modulation and large redundancy coding are adopted to improve the reliability.)
- 2020-06-30 03:20:02下载
- 积分：1
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kalman
说明： 在matlab simulink 中实现kalman滤波器设计，可以生动的演示kalman滤波在运动估计中的预测作用(Matlab simulink in achieving kalman filter design can be a vivid demonstration of kalman filtering in the motion estimation of the prediction)
- 2008-11-25 18:11:29下载
- 积分：1
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CFDPr
关于正交网格的生成方法，适用于流体力学等领域，内附详细说明(On orthogonal grid generation method, containing details)
- 2011-12-18 09:15:34下载
- 积分：1
