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matlabASKPSKFSK
数字信号的传输方式分为基带传输和带通传输，在实际应用中，大多数信道具有带通特性而不能直接传输基带信号。为了使数字信号在带通信道中传输，必须使用数字基带信号对载波进行调制，以使信号与信道的特性相匹配。这种用数字基带信号控制载波，把数字基带信号变换为数字带通信号的过程称为数字调制。通常使用键控法来实现数字调制，比如对载波的振幅、频率和相位进行键控。(Transmission of digital signals into base band transmission and band-pass transmission, in practice, most of the channel with band-pass characteristics can not directly transmit base-band signal. In order to make the digital signal is transmitted with a communication channel, you must use the digital baseband signal to modulate the carrier to make the signal to match the characteristics of the channel. The digital baseband signal control with a carrier, the digital baseband signal conversion to digital bandpass signal is called digital modulation. Keying method is commonly used digital modulation, such as on the carrier' s amplitude, frequency and phase shift keying.)
- 2010-11-14 16:08:52下载
- 积分：1
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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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Improved-differential
Improved differential evolution algorithm to optimize the hybrid particle swarm optimization intelligent optimization algorithm source code
- 2013-12-10 05:27:53下载
- 积分：1
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ThreePhaseModel
three-phase model of induction motor
- 2013-12-16 02:37:31下载
- 积分：1
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regress-192
Test that exceptions are correctly propagated when creating object literals.
- 2014-02-09 12:26:13下载
- 积分：1
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fd-psola
基于频域基音同步叠加的语音合成算法，在时域基音同步叠加的基础上增加频域调整的部分(Speech synthesis algorithm based on frequency domain pitch synchronous overlap and increase the frequency domain adjusted on the basis of the time-domain pitch synchronous superimposed on part)
- 2021-03-02 21:19:33下载
- 积分：1
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wcdma_ul_and_dl_simulation
基于3G标准wcdma的上下行通信链路，基于3GPP协议，采用matlab simulink的仿真(Up and down based on 3G standards wcdma line communication link, based on 3GPP protocol, using matlab simulink simulation)
- 2010-06-28 23:34:29下载
- 积分：1
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comserial
here is the code for serial communications
- 2010-07-10 04:20:44下载
- 积分：1
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work2
09年cumcm B题程序,统计出住院信息，数值模拟等， 有一定价值(the progress of CUMCM,B,2009)
- 2010-01-22 10:46:50下载
- 积分：1
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fourierica
FourierICA是一种无监管的自适应学习方法，用于盲源分离问题，将短时傅里叶变换STFT与独立分量分析ICA相结合。(FourierICA is an unsupervised learning method suitable for the analysis of bss.The method performs independent component analysis(ICA) on short-time Fourier transforms of the data. )
- 2015-01-28 10:49:37下载
- 积分：1
