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ofdm5124qpsk

于 2010-01-12 发布 文件大小:1KB
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下载积分: 1 下载次数: 3

代码说明:

  正交频分复用的调制的实现代码,调制只用一种方式(Orthogonal frequency division multiplexing modulation implementation of the code modulation only way to)

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    这组代码模拟了整个信号的编码,调制,解调,译码在无线通信,其中包括A-law扩展,PCM和的2PSK调制解调的技术过程。(This collection of codes simulates the whole signal encoding, modulation, demodulation, decoding process in wireless communication, which involves the techniques of A law companding, PCM, and 2PSK modulation and demodulation.)
    2010-12-28 17:15:22下载
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    2007-09-22 10:39:00下载
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    因为傅立叶变换对应的是无限信号,信号经过分帧后变成有限信号,分帧的信号再进行傅立叶变换后,高频部分将有 泄露 ,所以要加窗. 窗函数的拼谱都是在某高频部分截止,所以每帧信号加窗后的傅立叶变化,频谱基本 泄露 (Because Fourier transform corresponding is infinite signals, signals after framing become limited, framing signal again after Fourier transform, the high frequency part will have leaked , so to add window. Window function spell spectrum are in a high frequency part of the globe, so each frame and window after Fourier transform, signal spectrum basic leak )
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