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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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Hetrogenous
Paper on hetrogenous network
- 2018-04-11 20:52:39下载
- 积分：1
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Stability-of-Time-Delay-Systems__Control_Engineer
a reference book about stability of time delay systems
- 2012-04-17 21:26:38下载
- 积分：1
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standard-Statute-of-FT3
南自提供---标准FT3通讯规约格式,详细提供了他的格式(standard Statute of FT3)
- 2012-05-05 16:31:48下载
- 积分：1
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Helical-antenna
螺旋天线的设计与制作 (Helical antenna design and production)
- 2013-10-13 10:30:58下载
- 积分：1
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4G, LTE-Advanced Pro and The Road to 5G
本书描述了4G LTE / 5G NR 无线接入技术。(This book describes LTE, developed in 3GPP and providing true fourth-generation (4G) broadband mobile access, as well as the new radio-access technology
3GPP is currently working on. Together, these two technologies will provide 5G wireless access.)
- 2018-07-25 13:33:27下载
- 积分：1
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卫星通信中数字调相信号调制方式识别方法研究
针对数字卫星常用的 7 种通信信号调制方式(QPSK、8PSK、16QAM、32QAM、64QAM、16APSK、32APSK)，对零中心归一化瞬时幅度谱密度最大值、四次方谱、幅度、高阶累积量四种特征参数进行了分析，提出了一种联合特征参数的信号调制识别方法．(Aiming at seven communication signal modulation modes commonly used in digital satellite (QPSK, 8PSK, 16QAM, 32QAM, 64QAM, 16APSK and 32APSK), four characteristic parameters of zero-center normalized instantaneous amplitude spectral density, quadratic spectrum, amplitude and high-order cumulant are analyzed, and a signal modulation recognition method of joint characteristic parameters is proposed. Method.)
- 2020-06-21 09:20:02下载
- 积分：1
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SPMS_deal
SPMS deal 模块，SPMS deal 模——(SPMS deal 模块)
- 2013-11-08 20:57:16下载
- 积分：1
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A-Survey-on-Pixel-Based-Skin-Color
A Survey on Pixel-Based Skin Color Detection Techniques
- 2012-10-20 10:36:01下载
- 积分：1
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Smart-Antennas-For-Wireless-
描述了智能天线在无线通信环境下的各种应用。(Describes a smart antenna in a wireless communication environment, a variety of applications.)
- 2013-09-09 20:30:32下载
- 积分：1
