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QC_codes
Construct the short length of QC LDPC codes without girth 4 and girth 6(The Program to construct the short length of QC LDPC codes without girth 4 and girth 6
Copyright (C) Yang XIAO, Jun FAN, BJTU, July 26, 2007, E-Mail: yxiao@bjtu.edu.cn.
This program presents an approach [1] for constructing the short length of LDPC codes with girth 8. First, we design 3 submatrices with different shifting functions given by our schemes, then combine them into a matrix according to our approach, finally, expand the matrix into a desired parity-check matrix using identity matrices and cyclic shift matrices of the identity matrices.
The simulation results in AWGN channels show that the codes which can be obtained by the generator matrix derived from this check matrix for encoding the random information bits are as good as random LDPC codes [1].
Ref:
[1] J. Fan, Y. Xiao, “A design of LDPC codes with large girth based on the sub-matrix shifting”, IET International Conference on Wireless Mobile and Multimedia Networks Proceedings (ICWMMN 2006), (CP525), p. )
- 2009-05-28 16:00:14下载
- 积分：1
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tra
对阵矩阵的三对角化：用householder方法将n阶实对称矩阵约化成三对角形式(With the householder method to n-order real symmetric matrix into tridiagonal form )
- 2010-12-15 16:18:59下载
- 积分：1
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wanzhengchengxu
信号在信道进行传输时，经常会出现串扰，采用基于最大似然序列估计（MLSE）的电子色散均衡器的方法，克服光纤通信中的由各种色散引起的码间干扰。
研究基于最大似然序列估计（MLSE）的均衡器，采用维特比算法实现，用matlab仿真出采用MLSE后的性能指标（眼图和误码率）的提升。
(Signal transmission channel often occur crosstalk, based on the maximum likelihood sequence estimation (MLSE) electronic dispersion equalizer of the ways to overcome optical fiber communications in a variety of dispersion caused by the inter-symbol interference. Research based on the maximum likelihood sequence estimation (MLSE) of the equalizer, the Viterbi algorithm, a simulation using matlab after using MLSE performance indicators (eye diagram and bit error rate) of the upgrade.)
- 2020-12-12 22:29:16下载
- 积分：1
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ofdmsymbol_fft_cp
是有关ieee.802.16m里PFBCH的有关代码(Is the relevant code ieee.802.16m in PFBCH)
- 2011-10-28 14:01:50下载
- 积分：1
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anaask
用于产生ASK调频信号，在通信原理课程和信号处理中比较常用(used to proceed ask signal, and it is very useful in signal processing)
- 2014-12-02 10:30:16下载
- 积分：1
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Zooming-and-Shrinking
matlab实现用双线性插值法放大和缩小图像(Zooming and Shrinking Images by Bilinear Interpolation
(a) Write a computer program capable of zooming and shrinking an image by bilinear interpolation. The input to your program is the desired size of the resulting image in the horizontal and vertical direction. You may ignore aliasing effects.
(b) Download Fig. 2.19(a) and use your program to shrink this image 1024 x 1024 to 256 x 256 pixels.
(c) Use your program to zoom the image in (b) back to 1024 x 1024. Explain the reasons for their differences.
)
- 2015-04-29 23:00:26下载
- 积分：1
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shiyanyong_highstep_upconverter
一种高增益的交错boost变换器，增益可以高达10左右，是一种高效率高增益第成本的变换器。(hige_step boost)
- 2020-10-18 10:37:26下载
- 积分：1
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train_RBF_matlab
RBF神经网络Matlab代码，简单实用，非常适合刚接触神经网络的初学者。(RBF neural network Matlab code, simple and practical, very suitable for beginners new to the neural network.)
- 2016-04-27 22:17:38下载
- 积分：1
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SPIHT_code
SPIHT的编码与解码程序，在Matlab下运行。可以控制码率(SPIHT codec running under matlab. rate control is also available.)
- 2009-03-16 18:40:14下载
- 积分：1
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face_detection
Face Detection
In this program you will choose a photo and program will detect faces in this photo
- 2010-01-01 22:29:16下载
- 积分：1
