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multipath-and-time-varient-system
多径时变（多普勒效应）信道的文献讲解和相关仿真程序。(Multipath literature to explain the change (Doppler effect) channel and related simulation program.)
- 2020-11-05 21:49:50下载
- 积分：1
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vanetmatlab
artificial transportation system and internet of vehicles, internet of things, vanet, intelligent transportation.
- 2020-06-24 21:40:01下载
- 积分：1
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Solving
说明： 求解双层规划问题常用的算法有极点算法、直接搜索法、下降法和非数值优化方法(如模拟退火算法、遗传算法等)，遗传算法的求解思路是：首先对上层的决策变量编码，代人下层规划模型，通过求解下层模型的决策变量值，代入上层模型计算适应度值，然后进行交叉、变异、选择操作，最后求出最优解。(Solving Bilevel Programming Problems with pole algorithm commonly used algorithms, direct search method, descent and non-numerical optimization methods (such as simulated annealing, genetic algorithms, etc.), genetic algorithm for solving approaches: the first on the top of the decision variable coding, on behalf of the were lower programming model, by solving the lower model of decision variables values into the upper model on behalf of the fitness value, and then crossover and mutation, select Options, and finally get the best solution.)
- 2010-04-07 13:21:06下载
- 积分：1
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DTL645-2007
多功能电能表通信协议_645-2007.pdf(Multi-function watt-hour meter communication protocol _645-2007.pdf)
- 2012-07-07 00:16:31下载
- 积分：1
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DPSK_PCM_TDM
利用matlab simulink产生两路模拟语音信号，经过pcm编码、时分复用、DPSK调制经过同一个信道单向传输到对应的接收端。常用的三个模块 simulink、通信模块、信号处理模块。包括课程设计报告。(Using matlab simulink produce two analog voice signals through the pcm encoding, time division multiplexing, DPSK modulation over the same one-way transmission channel to a corresponding receiver. The three modules used simulink, communication module, a signal processing module. Including curriculum design report.)
- 2021-03-22 20:39:16下载
- 积分：1
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hippe-vector-pattern
vfev ve vvevfevefvevvevefve
- 2018-12-17 04:06:39下载
- 积分：1
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cat2013-Prospectus--cusat
see the attachments- cusat
- 2013-09-18 00:05:22下载
- 积分：1
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CDMA(2)
CDMA系统工程手册，有详尽的参数和标准，分一二三三册(CDMA Systems Engineering Handbook, detailed parameters and standards, in 2330 volumes)
- 2012-06-08 01:16:57下载
- 积分：1
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4
说明： ：载波频率偏移是OFDM系统实现的关键问题之一。分析了OFDM 系统载频偏移估计的2
种算法，即利用循环前缀和训练序列方法。它们均为最大似然估计方法。分别讨论了它们的基本
思想、实现方法和仿真结果。可以看出基于循环前缀算法复杂度较小，精度不高，而基于训练序列
的算法有较高的估计精度，但降纸了系统传输效率。(Abstract：Carrier frequency ofset is one of the key problems in OFDM system．Two foundational methods
。cycling prefix—based and training sequence—based algorithms。to estimate OFDM carriers~equency
ofset are analyzed．Then it discusses their basic thoughts。implementing methods and simulation resuits．
Finally。merits and demerits of every algorithm are supposed．It concludes that the cycling prefix—
based algorithm has less complexity and less precision。and that the training sequence—based algorithm
has better estimation performance at the cost of transmission efficiency．)
- 2010-05-18 18:34:44下载
- 积分：1
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asd
航空航天通信技术一般采用模拟通信的频率调制和数字通信的移相键控调制方法。这有利于充分应用信道带宽和能源。频率调制是在一定程度上改变载波或副载波的频率来传输信息的调制方法。移相键控调制是利用载波或副载波的相位跳变来传输信息的调制方法。移相键控又分二相移相键控、四相移相键控和多相移相键控，其中以四相移相键控和八相移相键控调制方法的效率较高(Aerospace communications technology commonly used analog communication of frequency modulation and the digital communication phase shift keying modulation method. This is helpful for making full use of channel bandwidth and energy. Frequency modulation is changed to some extent carrier or subcarrier frequency to transmit information modulation method. Phase shift keying modulation is the use of carrier or subcarrier phase jump to transmit information modulation method. Phase shift keying and binary phase shift keying, four phase shift keying and multiple phase shift keying, of which four phase shift keying and eight phase shift keying modulation method of high efficiency
)
- 2011-07-13 11:21:08下载
- 积分：1
