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Build<b>In</b>g

  • This project aim was to build wireless software modem for data communication between two computers

    This project aim was to build wireless software modem for data communication between two computers using an acoustic interface in the voice frequency range (20Hz– 20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz – 20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz – 16,000Hz). The test files used as information files were text files. This goal was attained both in an incoherent scheme and in a coherent scheme. Build under Matlab code, our modem uses OFDM (orthogonal frequency division multiplexing) modulation, synchronization by LMS sequence, channel estimation (no equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of 2 or 4. To optimize the probability of error, these symbols were mapped using Gray mapping. Report

    标签: communication computers software wireless

    上传时间: 2014-05-29

    上传用户:wangdean1101

  • 【实验名称】递归子程序分析器的设计与实现 【实验目的和要求】 设计、编制

    【实验名称】递归子程序分析器的设计与实现 【实验目的和要求】 设计、编制,调试一个典型的语法分析程序,实现对如下的递归子程序语法的分析,进一步掌握常用的语法分析方法。 【实验内容】 ① 本分析程序所分析的文法如下: G[E]: E->eBaA A->a|bAcB B->dEd|aC C->e|dC ② 针对上述文法编写一递归子程序分析程序,该程序的输入是任意符号串,输出是本次输入的符号串是否是该文法的句子的结论。 【环境】 Windows Pc 机,任何版本的c语言 其中还包括java语言实现的程序

    标签: 实验 分析器 递归 程序

    上传时间: 2013-12-25

    上传用户:lanhuaying

  • 图的深度遍历

    图的深度遍历,输出结果为(红色为键盘输入的数据,权值都置为1): 输入顶点数和弧数:8 9 输入8个顶点. 输入顶点0:a 输入顶点1:b 输入顶点2:c 输入顶点3:d 输入顶点4:e 输入顶点5:f 输入顶点6:g 输入顶点7:h 输入9条弧. 输入弧0:a b 1 输入弧1:b d 1 输入弧2:b e 1 输入弧3:d h 1 输入弧4:e h 1 输入弧5:a c 1 输入弧6:c f 1 输入弧7:c g 1 输入弧8:f g 1 深度优先遍历: a b d h e c f g 程序结束.

    标签:

    上传时间: 2016-04-04

    上传用户:lht618

  • Back in 2002, the 6502 disappeared out of all catalogues. Wanted to know, if it s possible to buil

    Back in 2002, the 6502 disappeared out of all catalogues. Wanted to know, if it s possible to build a binary compatible CPU with the things I had in the drawer: 74LS parts, 27C512 EPROMs and a fast static RAM from an old 80386 motherboard. Now here the results. Note, that the Bus timing is different from the 6502.

    标签: disappeared catalogues possible Wanted

    上传时间: 2016-04-09

    上传用户:hn891122

  • 华恒科技 HHCF5249-R3 技术手册 第一章 产品简介 第二章 软件系统 第三章 硬件系统 第四章 机械特性 第五章 底板的硬件设计 第六章 售后服务及技术支持 附录 附录A 初

    华恒科技 HHCF5249-R3 技术手册 第一章 产品简介 第二章 软件系统 第三章 硬件系统 第四章 机械特性 第五章 底板的硬件设计 第六章 售后服务及技术支持 附录 附录A 初始化 附录B LINUX 常见术语 附录C 常用LINUX 命令 附录D GCC 与GDB 附录E MAKEFILE 附录F UCLINUX 系统分析 uClinux 简介 uClinux 小型化的做法 uClinux 的开发环境 uClinux 的内存管理 工具及内核 附录G 图形界面(GUI)接口函数API 附录H 参考资料

    标签: HHCF 5249 华恒科技 产品简介

    上传时间: 2013-12-24

    上传用户:a6697238

  • 1) Write a function reverse(A) which takes a matrix A of arbitrary dimensions as input and returns a

    1) Write a function reverse(A) which takes a matrix A of arbitrary dimensions as input and returns a matrix B consisting of the columns of A in reverse order. Thus for example, if A = 1 2 3 then B = 3 2 1 4 5 6 6 5 4 7 8 9 9 8 7 Write a main program to call reverse(A) for the matrix A = magic(5). Print to the screen both A and reverse(A). 2) Write a program which accepts an input k from the keyboard, and which prints out the smallest fibonacci number that is at least as large as k. The program should also print out its position in the fibonacci sequence. Here is a sample of input and output: Enter k>0: 100 144 is the smallest fibonacci number greater than or equal to 100. It is the 12th fibonacci number.

    标签: dimensions arbitrary function reverse

    上传时间: 2016-04-16

    上传用户:waitingfy

  • ITU-T G.723.1 Speech Coder: Matlab implementation This package implements the speech coder and de

    ITU-T G.723.1 Speech Coder: Matlab implementation This package implements the speech coder and decoder. Full documentation is in the PDF file included with the package. The test folder has test programs for the coder and decoder (for Windows).

    标签: implementation implements package Speech

    上传时间: 2013-12-05

    上传用户:qq521

  • 电源:稳压的+5V电源

    电源:稳压的+5V电源,电流小于300mA。 视频输入:RGB+HSYNC+VSYNC信号,取自VGA卡,刷新率与NTSC标准兼容。 视频输出:混合视频和S-视频(Y/C)。 支持的视频标准:PAL B、G、H和NTSCM。 电路要求VGA卡能发送与PAL或NTSC标准视频时序兼容的RGB格式视频信号。

    标签: 电源 5V电源 稳压

    上传时间: 2014-11-22

    上传用户:zhuyibin

  • WMTSA toolbox is an implemenation for MATLAB of the wavelet methods for time series analysis techni

    WMTSA toolbox is an implemenation for MATLAB of the wavelet methods for time series analysis techniques presented in: Percival, D. B. and A. T. Walden (2000) Wavelet Methods for Time Series Analysis. Cambridge: Cambridge University Press.

    标签: implemenation for analysis toolbox

    上传时间: 2014-01-15

    上传用户:huangld

  • 本程序要求用户在控制台里输入非终极符

    本程序要求用户在控制台里输入非终极符,终结符与产生式,然后对用户输入的文法进行分析,得出first集 与follow 集,并打印出预测分析表用户决定是否继续进行句型分析,如继续则给出符号分析栈的实现,从而判断刚输入的句子是否为符合该文法的句子。 该程序遵循LL(1) 文法FIRST(A)的构造:是A的所有可能推导的开头终结符或可能的ε FOLLOW(A)是所有句型中出现在紧接A之后的非终结符或“#” 预测分析程序 构造LL(1)分析表 ⅰ,构造文法中所有元素的FIRST和FOLLOW集合 ⅱ,对文法G的每个产生式A->α执行第三步和第四步 ⅲ,对每个终结符a∈FIRST(α),把A->α加至M[A,a] ⅳ,若ε∈FIRST(α),则对任何b∈FOLLOW(A)把A->α加至M[A,b]中 ⅴ,把所有无定义的M[A,a]标上“出错标志”

    标签: 程序 用户 控制台 输入

    上传时间: 2013-12-27

    上传用户:jackgao