-
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
-
instructions
Photovoltaic systems, solar thermal systems based on knowledge training(PVSystem)
- 2010-10-21 09:24:46下载
- 积分：1
-
unam701
生成2KHz和8KHz的混合信号,使该信号通过上述滤波器,观察滤波前后的波形变化和频谱分布情况,(The mixed signal of 2KHz and 8KHz is generated, and the waveform changes and spectrum distribution before and after filtering are observed through the filter.)
- 2018-08-04 22:31:45下载
- 积分：1
-
TD_SCDMA
说明： td_scdma的完整程序，包括发送和接受两部分，涉及信道编解码，交织，扩频等(td_scdma complete process, including sending and receiving two parts, related to the channel encoding and decoding, interleaving, spreading, etc.)
- 2009-08-25 11:39:48下载
- 积分：1
-
modified_CMA
修正的CMA盲均衡算法，用于盲信道均衡，不依赖与训练序列(Modified CMA blind equalization algorithm for blind channel equalization, and training sequences do not depend)
- 2020-12-19 15:09:10下载
- 积分：1
-
vandemonde
该函数能产生一个任意阶的范德蒙德数组,可以用在无线通信等诸多领域。(This matlab function will generate an arbitrary-way Vandermonde arry.)
- 2017-11-22 10:49:20下载
- 积分：1
-
QQ
这是一个实现CS的QQ，并带有链接数据库的功能，主要功能有注册，群聊，私聊等(This is a realization of C S of the QQ, and with a link to a database functions, the main function of registration, group chat, private chat, etc.)
- 2013-07-15 16:09:07下载
- 积分：1
-
好用的EXCEL数据保存-3
学习LaBVIEW数据保存至EXCEL的很好的案例。(It is about how to save LabVIEW data in CSV.)
- 2017-09-27 10:31:28下载
- 积分：1
-
fdyanjiu
研究考虑多普勒频移fd情况的LFM调频目标回波特性(Study considers the case of Doppler shift fd target echo characteristics LFM FM)
- 2013-07-05 16:45:09下载
- 积分：1
-
slot-waveguide
用的Rsoft软件 模拟了两个矩形直波导的耦合情况，并监测其功率变化。 可用于分析微环耦合区域的光场。(Rsoft software used to simulate the two rectangular straight waveguide coupling, and to monitor their power change. Can be used to analyze micro-ring coupling region of the light field.)
- 2013-06-20 21:10:07下载
- 积分：1
