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analysis
: 正交频分复用( O F D M) 是第四代移动通信的核心技术。 该文首先简要介绍了O F D M基本原理, 重点研究了理想同步情
况下, 保护时隙( c P )和不同的信道估计方法在高斯信道和多径瑞利衰落信道下对O F D M系统性能的影响。 在给出O F DM系
统模型的基础上, 用 MAT L A B语言实现了整个系统的计算机仿真并给出参考设计程序。 最后给出在不同的信道条件下, 保
护时隙、 信道估计方法对 OF DM系统误码率影响的比较曲线, 得出了较理想的结论。
关键词: 正交频分复用; 仿真; 循环前缀; 信道估计(good)
- 2010-06-03 19:23:27下载
- 积分:1
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PureBasic-ABeginnersGuide
purebasic的入门书籍,虽然用purebasic的人很少,甚至分类都没他。不过这个语言还是不错的。(purebasic entry books, although very few people with purebasic, or even no his classification. However, the language is good.)
- 2010-08-18 01:28:39下载
- 积分:1
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VC-Digital
一本关于VC和VB数值计算的书,里面有个库,包括了很多的数值计算函数,不用matlab也可以实现数值计算了(A numerical calculation of VC and VB book, which has a library, including a lot of numerical functions can be achieved without matlab numerical calculation of the)
- 2011-09-27 21:15:12下载
- 积分:1
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Windows
介绍windows程序运行原理,讲述详细,涉及到windows运行的基本流程,让读者可以总体把握,比较适合初学者阅读使用。(Introduction windows program operating principle, tells in detail, the basic process involves running windows so that the reader can grasp the whole, more suitable for beginners to read to use.)
- 2014-02-23 22:06:40下载
- 积分:1
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example4_6
:滤波
fs=400 采样频率,必须大于两倍基带信号最高频率
ts=1/fs 采样时间间隔
T=5 时间窗大小
t=0:ts:T (hf1=zeros(1,N)
hf1(f<=B1&f>=-B1)=1
y1=hf1.*fftshift(y)
figure
subplot(211)
plot(f,abs(fftshift(y))/N,f,hf1, r-- )
axis([-fs/2,fs/2,0,1.2])
title( 原信号频谱 )
xlabel( f /Hz )
subplot(212)
plot(f,abs(y1)/N)
title( 低通滤波,截止频率90Hz )
xlabel( f /Hz ))
- 2010-05-25 20:58:05下载
- 积分:1
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FDTD3D_Main[1]
使用有限时域差分法,用matlab模拟三维光子晶体(the simulation of TM mode in three-dimensional photonic crystals)
- 2014-10-31 13:14:23下载
- 积分:1
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1111
matlab--巴特沃斯高通滤波算法来增强图像(Matlab, butterworth high pass filter algorithm to enhance image)
- 2014-10-16 14:28:53下载
- 积分:1
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The-coding-principle-of-courseware-
详细介绍了编码原理的基础知识,是编程的入门级必备教材(Details the basics of coding theory, is an essential textbook entry-level programming)
- 2013-12-23 19:20:12下载
- 积分:1
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kriging-(1)
克立格插值工具箱,matlab版,里面有很多程序,有帮助就看看,很不错-Kriging interpolation toolbox, matlab version, which has a lot of procedures, there is help on the look, very good
- 2013-01-08 19:47:20下载
- 积分:1
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radar_trans_of_airplane
pdf文档,机载雷达坐标系变换相关内容,介绍了机载雷达坐标系下的探测目标位置表达方式(pdf document,introduce the coordinates translates method of the airplane between the target)
- 2015-02-10 22:20:21下载
- 积分:1