-
SoftwearRadioSimulation
说明： 本文应用软件无线电思想对全数字接收机中的几个关键技术进行了研究，对其中的基本结构及基本模块进行了建模仿真。
(In this paper, thinking of all-digital software radio receiver in several key technologies were studied, of which the basic structure and the basic module of modeling and simulation.)
- 2010-04-27 13:27:59下载
- 积分：1
-
OFDM rece matlab
接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法可参考算法说明文档。这里对程序的流程进行说明。
首先根据短训练字的特性进行相关运算，进行信号到达检测，当检测到相关值大于门限一定次数后，认为有信号到达。然后根据长训练字的特性，进行相关运算，进行OFDM符号FFT窗口起始位置的估计。估计出FFT窗口的位置后，先在时域进行小频偏的估计，将两个长训练字进行小频偏补偿后，进行FFT运算，根据FFT运算的结果进行整数倍频偏的估计。这些参数估计完成后，就可以进行数据解调了。先对数据部分进行完整的频偏补偿，然后根据估计的FFT窗口位置进行FFT运算得到频域的数据，进行解调。然后在对应于导频的子载波位置上提取出导频信息，根据导频信息估计出剩余定时误差以及剩余的信道响应误差，将误差量送入环路进行跟踪。当收到所有数据后，重新回到信号到达检测状态，进行下一次信号到达的检测和信号接收。
(The receiving end uses the algorithm and the program flow and the frame structure of the OFDM symbol transmitted by the sending end. Specific frame structure, and timing estimation, frequency offset estimation, residual error tracking algorithm can refer to the documentation. Here to illustrate the process of the program.
First, according to the characteristics of the short training word correlation operation, the signal reaches the detection, when the correlation value is greater than the threshold of a certain number of times, that there is a signal to reach. Then, according to the characteristics of the long training word, the correlation operation is carried out, and the initial position of the OFDM symbol FFT is estimated. The estimated position of the FFT window, first in the time domain for small frequency offset estimation, two long training word for small frequency offset compensation, the FFT operation. According to the result of FFT for integer frequency bias estimation. Af)
- 2020-11-05 00:19:52下载
- 积分：1
-
runge_kutta
本文用龙格库塔法求解了不拉休斯解。龙格库塔法是求解高阶微分方程的有力工具，本文对龙格库塔方法作了简要介绍，并附上了matlab源程序。(in this paper a runge_kutta method was used to slove the blasius equation in the environment of matlab.)
- 2009-05-02 09:15:06下载
- 积分：1
-
zifu
字符识别，具有一定的准确率，参考使用。MATLAB预言编写的代码(Character recognition, with some accuracy, use and reference. MATLAB code written prophecy)
- 2010-05-09 22:00:33下载
- 积分：1
-
FLICKER
hht分析电力系统中的电压闪变现象
（自己写的code，100 能用，有EMD的分解图）
实现了HHT在电力系统稳定性分析的应用(analysis power systerm disturbance-flicker base on HILBERT HUANG TRANSFORM
)
- 2011-08-10 19:15:10下载
- 积分：1
-
80211n
一种基于802.11n协议的MIMO-OFDM系统仿真代码。(The simulation code of MIMO-OFDM system based on 802.11n protocol.)
- 2014-12-04 09:51:25下载
- 积分：1
-
downsample4
I need the matlab codings for medical image proccessing for eg:downsampling,bicubic interpolation
- 2012-10-07 02:15:14下载
- 积分：1
-
MEMORY-NEURAL-NETWORK-a-PROTEIN
MEMORY,NEURAL NETWORK & PROTEIN
- 2014-12-30 17:59:21下载
- 积分：1
-
1122
其实操作系统在调用 main 函数时是传参数的，main 函数最标准的形式应该是 int
main(int argc, char *argv[])，在第 6 节 “指向指针的指针与指针数组”
详细介绍。C 标准也允许 int main(void)这种写法，如果不使用系统传进来的两
个参数也可以写成这种形式。但除了这两种形式之外，定义 main 函数的其它写法都
是错误的或不可移植的。(The 88-bytes (704-bits) in the Configuration zone contain manufacturing identification data, general device, and
system configuration, and access restriction control values for the slots within the Data zone. The values of
these bytes can always be obtained using the Read command. The bytes of this zone are arranged as shown in
Table 2-2)
- 2015-01-05 17:13:58下载
- 积分：1
-
chaohundunfenchak
超混沌系统的分岔图求解，内容详细易懂，可读性好(Hyperchaotic system to solve the bifurcation diagram, detailed easy to understand and readable)
- 2010-06-15 14:25:06下载
- 积分：1
