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cross-layer

  • code wimax use c++ imanite mac layer in ns2

    code wimax use c++ imanite mac layer in ns2

    标签: imanite wimax layer code

    上传时间: 2017-09-20

    上传用户:teddysha

  • a program written by delphi about middle layer

    a program written by delphi about middle layer

    标签: program written delphi middle

    上传时间: 2014-01-08

    上传用户:qq521

  • the algorithm of cross validation

    the algorithm of cross validation

    标签: validation algorithm cross the

    上传时间: 2014-08-28

    上传用户:Late_Li

  • ı t is about transport layer for network lessons

    ı t is about transport layer for network lessons

    标签: transport network lessons about

    上传时间: 2017-09-28

    上传用户:ljmwh2000

  • 互相关函数,cross-correlation function

    互相关函数,cross-correlation function

    标签: cross-correlation function 函数

    上传时间: 2017-09-28

    上传用户:huannan88

  • cross-correlation function

    cross-correlation function

    标签: cross-correlation function

    上传时间: 2017-09-28

    上传用户:kr770906

  • 互相关函数,cross-correlation function

    互相关函数,cross-correlation function

    标签: cross-correlation function 函数

    上传时间: 2017-09-28

    上传用户:ecooo

  • Physical Layer Security in Wireless Communications

    The ever-increasing demand for private and sensitive data transmission over wireless net- works has made security a crucial concern in the current and future large-scale, dynamic, and heterogeneous wireless communication systems. To address this challenge, computer scientists and engineers have tried hard to continuously come up with improved crypto- graphic algorithms. But typically we do not need to wait too long to find an efficient way to crack these algorithms. With the rapid progress of computational devices, the current cryptographic methods are already becoming more unreliable. In recent years, wireless re- searchers have sought a new security paradigm termed physical layer security. Unlike the traditional cryptographic approach which ignores the effect of the wireless medium, physi- cal layer security exploits the important characteristics of wireless channel, such as fading, interference, and noise, for improving the communication security against eavesdropping attacks. This new security paradigm is expected to complement and significantly increase the overall communication security of future wireless networks.

    标签: Communications Physical Security Wireless Layer in

    上传时间: 2020-05-31

    上传用户:shancjb

  • MP3音频编解码运算中IMDCT算法研究及其FPGA实现.rar

    近年来,随着多媒体技术的迅猛发展,电子、计算机、通讯和娱乐之间的相互融合、渗透越来越多,而数字音频技术则是应用最为广泛的技术之一。MP3(MPEG-1 Audio LayerⅢ)编解码算法作为数字音频的解决方案,在便携式多媒体产品中得到了广泛流行。 在已有的便携式MP3系统实现方案中,低速处理器与专用硬件结合的SOC设计方案结合了硬件实现方式和软件实现方式的优点,具有成本低、升级容易、功能丰富等特点。IMDCT(反向改进离散余弦变换)是编解码算法中一个运算量大调用频率高的运算步骤,因此适于硬件实现,以降低处理器的开销和功耗,来提高整个系统的性能。 本文首先阐述了MP3音频编解码标准和流程,以及IMDCT常用的各种实现算法。在此基础上选择了适于硬件实现的递归循环实现方法,并在已有算法的基础上进行了改进,减小了所需硬件资源需求并保持了运算速度。接着提出了模块总体设计方案,结合算法进行了实现结构的优化,并在EDA环境下具体实现,用硬件描述语言设计、综合、仿真,且下载到Xilinx公司的VirtexⅡ系列xc2v1000FPGA器件中,在减小硬件资源的同时快速地实现了IMDCT,经验证功能正确。

    标签: IMDCT FPGA MP3

    上传时间: 2013-05-31

    上传用户:Minly

  • 世界超级电容器发展动态

    超级电容器又称超大容量电容器、金电容、黄金电容、储能电容、法拉电容、电化学电容器或双电层电容器(英文名称为EDLC,即Electric Double Layer Capacitors),是靠极化电解液

    标签: 超级电容器 发展动态

    上传时间: 2013-05-23

    上传用户:gxmm