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nstimer

于 2011-11-12 发布 文件大小:21KB
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下载积分: 1 下载次数: 14

代码说明:

  实现倒计时的一个小demo 可以用来参考(Countdown to achieve a small demo can be used to refer to)

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  • 3.6
    主要用途是对抗多径衰落。由于多径衰落的存在,使得同一个帧由于路径不同,到达用户端的时延有先有后。在相关的频域上的会造成子载波之间的相互干扰,影响 性能。另外,由于有了循环前缀,使得IFFT FFT操作把原来的线性卷积变成循环卷积,大大简化了相应的信号处理复杂度(The main purpose is to fight against multipath fading. Due to the presence of multipath fading, the first after they have the same frame different paths to reach the client delay. Would cause mutual interference between sub-carriers in the frequency domain, affecting performance. In addition, thanks to the cyclic prefix, so IFFT FFT operation to the linear convolution of the original into a circular convolution, greatly simplifying the corresponding signal processing complexity)
    2012-08-24 15:16:21下载
    积分:1
  • 46845435
    类似于Pinterest的瀑布墙图片展示demo,精选ios编程学习源码,很好的参考资料。(Similar to the Pinterest waterfall wall pictures demo, select learning IOS programming source code, a good reference.)
    2013-12-06 10:28:53下载
    积分:1
  • Iphone_Debug_iTunes
    说明:  iPhone真机调试及如何上传到Apple Application Store平台。(iPhone-device debugging and how to upload to the Apple Application Store platform.)
    2011-02-23 22:13:02下载
    积分:1
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    A good guideline for objective c programmers.
    2014-08-21 13:47:41下载
    积分:1
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    2010-07-27 01:14:02下载
    积分:1
  • 68965
    很炫的抽屉式侧边栏导航效果,精选ios编程学习源码,很好的参考资料。(Drawer type sidebar navigation effect of cool, selection of learning IOS programming source code, a good reference.)
    2013-12-06 11:38:11下载
    积分:1
  • Mypush_Callback
    排队论 (Queuing Theory)也称随机服务系统理论,就是为解决有关排队问题而发展的一门学科。(Queuing theory (Queuing Theory), also known as stochastic service system theory, a discipline is developed to solve the queuing problem.)
    2012-05-24 14:19:46下载
    积分:1
  • matttt
    more programs on matlab
    2012-11-30 03:03:36下载
    积分:1
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    2015-04-04 05:32:25下载
    积分:1
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    MATLAB SIMULINK SIMITH 控制模型(MATLAB SIMULINK SIMITH control model)
    2014-01-17 10:19:57下载
    积分:1
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