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2177e8d3adb15fabed33322ffd32afc8394a
说明： an investigation on use of chaotic sequence in DS-CDMA. The DS-CDMA systems offer
physical layer security without the need for a significant increase in computation or power requirements. Nowadays, DSCDMA
has been used widely. These systems suffers from multiple access interference because of other users transmitting
in the cell, channel inter symbol interference and additive white Gaussian noise. Codes have an effective role in DSCDMA
system, so M-sequences; gold sequences have been used as spreading codes in DS-CDMA. These sequences by
shift registers and periodic in nature are developed. However, these sequences are not enough and also limit the security.
This paper presents an investigation on use of new type of sequences called chaotic sequences for DS-CDMA system.
These sequences by chaotic maps are generated.
- 2019-03-13 22:41:27下载
- 积分：1
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flt_calc
filter calculations matlab files
- 2010-06-13 17:37:49下载
- 积分：1
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PVblockcheck
光伏电池的数学模型，用最常见的数学模型进行编程，仿真效果良好(The mathematical model of photovoltaic cells, with the most common mathematical model for programming, simulation results good)
- 2013-09-20 22:33:12下载
- 积分：1
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CCDF
与DFT扩展OFDMA信号的CCDF和PAPR
OFDM信号的CCDF没有PAPR降低技术
一个QPSK/ OFDM系统的峰均功率比和BER分析
限幅滤波技术
(CCDF and PAPR of an OFDMA signal with DFT spreading
CCDF of OFDM signal without PAPR reduction technique
PAPR and BER analysis of a QPSK/OFDM system with the
clipping and filtering technique
)
- 2015-04-06 13:13:01下载
- 积分：1
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power_svpwm
this is .mdl file for svpwm(space vector pwm)
- 2009-09-08 23:30:42下载
- 积分：1
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matlabprogram
说明： 了解matlab编程的机制，里面包含了80多个matlab程序，是初学者的必备资料。(Matlab program to understand the mechanism, which includes more than 80 matlab program, is essential information for beginners.)
- 2009-08-24 09:53:01下载
- 积分：1
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三种熵
样本熵,MATLAB
模糊熵,MATLAB
近似熵,MATLAB(Entropy is a measure of complexity. It quantifies the unpredictability of fluctuations in a time series.)
- 2021-03-27 20:59:11下载
- 积分：1
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HHT2
这是关于HHT的一个实际信号的HHT谱和边际谱源码。你只需复制到matlab即可运行。很实用。(This is about a real signal HHT HHT spectrum and marginal spectrum of the source code. You just copied to the matlab to run. Very practical.)
- 2010-10-09 15:11:55下载
- 积分：1
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superheterodyne
This is a superheterodyne reciever simulation, created in MATLAB - Simulink. The purpose is to study the effect of perturbations on the imaginary frequence and on the intermmediate frequence, in the context of incoherent demodulation.(This is a superheterodyne reciever simulation, created in MATLAB- Simulink. The purpose is to study the effect of perturbations on the imaginary frequence and on the intermmediate frequence, in the context of incoherent demodulation.)
- 2009-05-22 20:54:34下载
- 积分：1
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System-ID-Theory-for-the-User-2nd-ed
系统辨识的经典之作，作者为matlab系统辨识工具箱的编写者。(System Identification classic, author matlab System Identification Toolbox writers.)
- 2014-01-07 21:47:05下载
- 积分：1
