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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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weixin_Protocol
web版微信协议分析。当前分析到登陆部分。举一反三，后续的拉取好友列表和发送消息等协议都好分析出来了。作者：孙强壮。(The web version of the micro-channel protocol analysis. Current analysis to the landing part. Giving top priority to, the subsequent pull friends list and send messages agreements out a good analysis.)
- 2012-09-11 23:46:01下载
- 积分：1
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New folder (3)
说明： this folder contains VIs related to USRP.
- 2019-06-08 22:23:44下载
- 积分：1
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physical layer aspects
The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number.
- 2018-01-30 19:03:30下载
- 积分：1
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4850
利用matlab GUI实现的串口编程例子，独立成分分析算法降低原始数据噪声，构成不同频率的调制信号。( Use serial programming examples matlab GUI implementation, Independent component analysis algorithm reduces the raw data noise, Constituting the modulated signals of different frequencies.)
- 2017-05-08 17:17:11下载
- 积分：1
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4
说明： document qpsk vhdl code
- 2018-01-06 09:27:04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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pcm
语音编码方案的选取对移动通信系统的通话质量、信道容量等有重要影响。本文讨论了TD-SCDMA系统中AMR语音编码的自适应机制，同时分析了AMR中代数码本线性预测(ACELP)算法及实现过程。该方案可以在一块TMS320C5510上实现。(The selection of voice coding schemes for mobile communication systems the quality of the call, such as channel capacity have had a significant impact. In this paper, TD-SCDMA System AMR Adaptive speech coding mechanism, at the same time analysis of AMR in the generation of Digital Linear Prediction (ACELP) algorithm and the realization of the process. The program can be achieved in a TMS320C5510.)
- 2009-04-27 22:26:09下载
- 积分：1
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Designing.a.Wireless.Network
This book is very nice for designing a wireless network which describes in details how the wireless systems are designed.
- 2012-01-31 18:40:25下载
- 积分：1
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Symotion_Overview
Symotion是一种用于运动控制的实时工业总线，基于10/100M以太网物理层，应用层使用canopen及精简协议。可应用于运动控制器，电机驱动器，PLC，编码器光栅尺与其它工业现场执行器互连。symotion总线提供安全、开放、低成本及高性能应用。(Symotion is a synchronous real-time FieldBus for Motion
control . Build on a 10/100M Ethernet physical layer , and
Canopen or reduced protocol Layer. interconnect between motion
controllers, Motor drives, I/O modules, encoder devices and other
actuators. Symotion provides Safety , Open , low cost and high
performance in all applications.)
- 2011-08-16 12:41:16下载
- 积分：1
