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Modulation-of-a-signal

于 2015-03-01 发布 文件大小:111KB
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  Modulation of signal like amplitude modulation

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  • snake
    贪吃蛇,大家都知道了,这个界面有点粗糙。顺便请问一下axis的 drawmode 设为 normal  或  fast 有什么区别。(As we all known, this is the snake game. The GUI isn t very well. By all means, it is not bad to make it by MATLAB.)
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  • gnngauss
    该文件是产生两组随即的高斯分布系列,均值为0,均方差为N/2(The document was then produced two series of Gaussian distribution, the mean of 0 and standard deviation of the N/2)
    2007-03-31 12:59:04下载
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  • tber2
    Quadrature amplitude modulation (QAM) is a modulation scheme in which two sinusoidal carriers, one exactly 90 degrees out of phase with respect to the other, are used to transmit data over a given physical channel. One signal is called the I signal, and the other is called the Q signal. Because the orthogonal carriers occupy the same frequency band and differ by a 90 degree phase shift, each can be modulated independently, transmitted over the same frequency band, and separated by demodulation at the receiver. For a given available bandwidth, QAM enables data transmission at twice the rate of standard pulse amplitude modulation (PAM) without any degradation in the bit error ratio (BER).
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