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on-the-modulation-technology-in-OFDM
在 OFDM 数学原理和收发模型的基础上，本文对帧同步、定时同步、频率同
步和采样同步给 OFDM 系统所产生的影响进行了理论分析，同时讨论了基于循环
前缀或训练符号的典型 OFDM 同步算法。参考 802.11a 突发数据帧结构和系统参
数，分析几种 OFDM 同步算法用于突发分组传输的性能；在分析了几种经典的信
道估计算法基础上,通过对复杂度和性能的折衷，选择一种适合本文系统的估计
算法。最后作者提出一种改进型 LS 信道估计算法，该算法考虑了 LS 算法中噪声
的影响，从而提高了低信噪比下信道估计的精度。仿真结果表明，改进算法在低
信噪比下具有良好的性能。
(OFDM mathematical principles and transceiver model based on frame synchronization, timing synchronization, frequency synchronization and sampling synchronization to the OFDM system, the impact of the theoretical analysis are also discussed based on the cyclic prefix or training symbols typical OFDM synchronization algorithm . Reference 802.11a burst data frame structure and system parameters, analyze several OFDM synchronization algorithm for burst packet transmission performance several classic channel estimation algorithm based on a compromise between complexity and performance, select a suitable estimation algorithm in this article. Finally, the author proposed a modified LS channel estimation algorithm that takes into account the effects of noise in the LS algorithm, thus improving the low SNR channel estimation accuracy. Simulation results show that the improved algorithm has good performance in low signal-to-noise ratio.)
- 2013-05-10 15:18:30下载
- 积分：1
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PT2262PT2272
PT2262 PT2272 315M/433M 无线编码芯片中文资料，简单易用(The PT2262 PT2272315 Ms/433 M lead-in codes the chip Chinese data, simple easy use)
- 2009-06-21 06:54:42下载
- 积分：1
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aaa
这是一个关于数字通信原理的实验，特别适合大学生们，(This is a study on the principle of digital communication experiments, particularly suitable for students,)
- 2007-12-17 23:23:12下载
- 积分：1
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MISO_Capacity
MIMO指多输入多输出，MIMO技术大致可以分为两类：发射/接收分集和空间复用。传统的多天线被用来增加分集度从而克服信道衰落，具有相同信息的信号通过不同的路径被发送出去，在接收机端可以获得数据符号多个独立衰落的复制品，从而获得更高的接收可靠性。这种技术往往要结合多天线技术，而多天线技术在移动通信中得到了广泛的研究。(MIMO refers to Multiple Input Multiple Output, MIMO technology can be broadly classified into two categories: transmit/receive diversity and spatial multiplexing. Traditional multi-antenna was used to increase the degree of diversity to overcome channel fading, the signal with the same information through different paths have been sent in the receiver-side data symbols can be multiple independent copies of the decline, which was higher reception reliability. This technology often have to combine multi-antenna technology, and multi-antenna technology in mobile communication has been widely studied.)
- 2008-06-01 20:34:32下载
- 积分：1
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Interpolation_Filter
插值滤波器，可以改变样值的抽样速率问题，比如把2倍抽样的样值转换为2.5倍抽样的样值。(Interpolation filter, can change the kind of questions the value of the sampling rate, such as 2 times the sample put the kind of value is converted to 2.5 times the sample value of the sample.)
- 2009-03-04 09:08:08下载
- 积分：1
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ldpc
ldpc编码的matlab实现，供大家参考(Matlab implementation of LDPC coding for your reference)
- 2021-01-25 16:28:43下载
- 积分：1
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I2CControl
这是使用Labview实现I2C通讯的程序，很好的算法，通讯速率会很快。(This is the use of Labview realize I2C communication procedures, a good algorithm, communication speed very fast.)
- 2009-02-20 09:48:27下载
- 积分：1
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Communication_Network20071017_12
主要介绍ofdm中各种信道估计方法，包含一维和二维信道估计方法(Introduces the OFDM channel estimation in a variety of methods, including the one-dimensional and two-dimensional channel estimation methods)
- 2021-03-17 20:59:21下载
- 积分：1
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Amplifier
光纤放大器模拟程序，包括泵浦功率、光纤增益、光纤长度等参数(fiber amplifier)
- 2012-01-06 15:30:14下载
- 积分：1
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FX3Uplcvb6
三菱通讯,VB源代码。经过全面测试。现与大家分享。(Mitsubishi communications VB source code. Have been fully tested. Now share with you.)
- 2012-11-22 16:33:33下载
- 积分：1
