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QPSK

于 2013-12-23 发布文件大小:90KB

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数字调制就是把数字基带信号的频谱搬移到高频处，形成适合在信道中传输的带通信号。基本的数字调制方式有振幅键控（ASK）、频移键控（FSK）、绝对相移键控（PSK）、相对（差分）相移键控（DPSK）。在接收端可以采用想干解调或非相干解调还原数字基带信号。 (Digital modulation is the spectrum shifting to high frequency digital baseband signals, suitable for the formation of bandpass signal transmission in the channel. Digital modulation basic amplitude keying (ASK), frequency shift keying (FSK), the absolute phase shift keying (PSK), relative (differential) phase shift keying (DPSK). At the receiving end can be used to dry the demodulation or non coherent demodulating the digital baseband signal. )

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m2
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2014-08-12 12:47:05下载

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2013-09-07 09:31:41下载

积分：1
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2020-10-21 16:57:24下载

积分：1
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2016-05-02 19:29:35下载

积分：1
VICalculation_losslessTl
该matlab函数用来计算理想无耗传输线上电压电流的分布，用户需要给定传输线的特性阻抗、电长度以及出事端的反射系数。(Matlab function used to calculate the ideal power transmission lines without the distribution of voltage and current, users need to set the characteristic impedance of transmission lines, electricity, as well as the length of the reflection coefficient of trouble.)

2009-03-30 08:59:53下载

积分：1
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2014-12-17 15:17:46下载

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2013-12-25 18:51:41下载

积分：1
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2011-01-03 18:27:04下载

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2014-01-06 14:34:11下载

积分：1

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