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cskmeans
cskmeans 聚类算法的一种
1. 分裂法(partitioning methods):给定一个有N个元组或者纪录的数据集,分裂法将构造K个分组,每一个分组就代表一个聚类,K<N。而且这K个分组满足下列条件:(1) 每一个分组至少包含一个数据纪录;(2)每一个数据纪录属于且仅属于一个分组(注意:这个要求在某些模糊聚类算法中可以放宽);对于给定的K,算法首先给出一个初始的分组方法,以后通过反复迭代的方法改变分组,使得每一次改进之后的分组方案都较前一次好,而所谓好的标准就是:同一分组中的记录越近越好,而不同分组中的纪录越远越好。使用这个基本思想的算法有:K-MEANS算法、K-MEDOIDS算法、CLARANS算法;()
- 2008-07-07 10:52:51下载
- 积分:1
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work
说明: 实现图像的正反傅里叶变换,并用fft实现两幅图像的幅相交换(Amplitude and phase s replacement with fft)
- 2011-03-21 20:48:19下载
- 积分:1
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matlab5
说明: 低通信号抽样定理、13折线A律逐次比较型PCM编译码(Low-pass signal sampling theorem, 13 successive line A comparative law PCM codec)
- 2010-04-19 17:18:23下载
- 积分:1
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Exemple2
matlab code for simulation SNR to verify capcity of channel
- 2012-05-03 23:46:16下载
- 积分:1
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rakereceive_kron
本程序仿真了AWGN信道下,采用DS扩频对bpsk信号的影响,扩频码采用walsh码,扩频因子16;
接收端进行rake接收,然后分集合并,比较了三种分集方式对误码率的影响
从图像可以看出在扩频因子较高的情况下,最大比值合并与等增益合并性能相近(This program simulates the AWGN channel, using DS spread spectrum signal for bpsk influence spreading code using walsh code spreading factor 16
Rake receiver receiving end, and diversity combining, diversity compares three methods on the bit error rate of
As can be seen from the image in the case of higher spreading factor, the maximum ratio combining and equal gain combining similar performance)
- 2013-08-31 18:29:24下载
- 积分:1
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FM
用matlab的m文件仿真FM过程,从调制到白噪声到解调(Simulation using matlab m file FM process, from modulated white noise to the demodulator)
- 2013-10-26 22:38:16下载
- 积分:1
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consellation
在:1)理想无噪生条件,2)SNR=10dB,3)SNR=20dB,4)两径衰落信
道{0, 0}、{-6dB,-10symbol}条件下,分别产生 1000 个符号的 QPSK、8PSK、
16QAM 星座点, 画出信号序列的星座图, 提交电子版信号产生、 加噪、 显示的*.m
程序和电子版 WORD 报告。 报告要求给出原理描述、 框图和分析说明输出结果。(In: 1) an ideal noiseless Health conditions, 2) SNR = 10dB, 3) SNR = 20dB, 4) two-path fading channel {0, 0}, {-6dB,-10symbol} under conditions generate 1,000 symbols QPSK, 8PSK, 16QAM constellation points, draw constellation signal sequence, submit an electronic version of the signal, noise, display*. m procedures and electronic WORD report. Reporting requirements given Principles, and the analysis shows a block diagram of the output.)
- 2020-07-02 22:00:01下载
- 积分:1
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DDC
说明: 数字下变频的matlab程序,在matlab中可运行(a progrme about ddc)
- 2011-03-25 15:31:54下载
- 积分:1
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MPSKQAM
本文深入研究了复杂调制信号MPSK、MQAM的倍号子类以及常用恒包络信
号OQPSK、or/4 QPSK、MSK的调制识别披本。在鳆种基本调制识别方法即基于特征提取的方法和基于最大似然的方法的纂础上采用四种算法分别对上述信号进行识别研究。(This article studies the complex modulation signals MPSK, MQAM number of times and the common sub-class of constant envelope signals OQPSK, or/4 QPSK, MSK modulation recognition of this disclosure. Abalone species in the basic modulation recognition method that is based on feature extraction methods and maximum likelihood methods based on the Article on the foundation of four algorithms to identify each of these signals.)
- 2010-06-01 11:07:29下载
- 积分:1
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image-forgery-with-siftand-ransac
the folder gives information about the image forgery detection. detection is made by examining the sift and ransac features of the image. color processing is done as a preprocessing step.
- 2014-03-11 13:18:42下载
- 积分:1