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kuopin
直接序列扩频系统（DS，Direct Sequence）又称为直接序列调制系统或伪噪声系统（PN 系统），简称为直扩系统，是目前应用较为广泛的一种扩展频谱系统。要传送的信息经伪随机序列编码后对载波进行调制。在发信端越冬用扩频序列去扩展信号的频谱，在收信端，用相同的扩频友序列进行解扩，将展宽的频谱扩展信号还原成原始信号。因为伪随机序列的速率远大于要传送信息的速率，所以受调信号的频谱宽度将远大于要传送信息的频谱宽度，帮称之为扩频(Direct sequence spread spectrum (DS, Direct Sequence) modulation system, also known as direct sequence or pseudo-noise system (PN system), referred to as direct expansion systems, is currently the more widely used as a spread spectrum system. To send the information encoded by the pseudo-random sequence of carrier modulation. End of winter in the letter to extend the signal with the spreading sequence of spectrum, in the end prepared to receive and use the same sequence spread spectrum despreading friends, broadening the spectrum to restore the original signal expansion signals. Because the rate of pseudo-random sequence is much larger than the rate of information to be sent, so the frequency spectrum by adjusting the width of the spectrum is much larger than the width of the information to be sent to help is called spread spectrum)
- 2011-01-09 16:54:26下载
- 积分：1
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envelop
matlab code for the envelope detector in analog communications.
- 2013-11-17 02:45:25下载
- 积分：1
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DigitalSignalProcessing
清华大学研究生教学用书，作者：胡广书《数字信号处理:理论算法与实现》一书附属光盘。(Qinghua University graduate teaching book, the author : Mr. Kwong book "Digital Signal Processing : theoretical algorithm with the realization of "a book subsidiary CD.)
- 2007-01-19 17:04:21下载
- 积分：1
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WSN
本文件用于演示无线传感器网络中的两个经典算法所编写的，关于无线传感器网络自身定位系统算法中的凸规划定位算法和DV-coordinate算法的演示。(This file is used to demonstrate wireless sensor networks written two classical algorithms, convex programming algorithm and DV-coordinate positioning algorithm demo on their own positioning system for wireless sensor network algorithms.)
- 2015-01-01 22:49:34下载
- 积分：1
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wenjian
玩转文件字符操作,倒叙,输入输出 缓冲与非缓冲(file )
- 2010-01-06 19:00:07下载
- 积分：1
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BER_QPSK
Bit error probability for BPSK, MATLAB code
- 2011-07-16 11:38:21下载
- 积分：1
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New-folder
involes leach clustering method. the energy efficient way to custer the nodes in a wireless networks and the modulation schemes involved in these wireless sensor communication
- 2012-08-05 17:04:07下载
- 积分：1
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matlab
说明： matlab编程例子，包括数值分析、绘图以及其他的一些高级应用。(matlab programming examples, including numerical analysis, mapping and other advanced applications.)
- 2008-09-19 10:05:27下载
- 积分：1
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MATLAB-program
现代通信系统使用MATLAB全部程序
源文件(All modern communication systems using MATLAB program)
- 2011-10-21 17:49:22下载
- 积分：1
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step
tracking of step trajectory bu wheeled mobile robot
- 2014-11-23 00:34:08下载
- 积分：1
