Description: 抑制载波双边带调幅和解调的实现,
Matlab代码编写实现.
采用Matlab或者其它软件工具实现对信号进行抑制载波双边带调幅（DSB-SC）和解调，并且绘制：
（1）信号 及其频谱；
（2）载波 ；
（3）DSB-SC调制信号及其频谱；
（4）DSB-SC调制信号的功率谱密度；
（5）相干解调后的信号波形。
-Carrier suppression bilateral with the realization of amplitude modulation and demodulation, Matlab code prepared to achieve. Using Matlab or other software tools to achieve suppression of signals with carrier bilateral AM (DSB-SC) and demodulation, and mapping: (1) signal and its spectrum ( 2) Carrier (3) DSB-SC modulated signal and its spectrum (4) DSB-SC modulation signal power spectral density (5) coherent demodulation signal waveform. Platform: |
Size: 93184 |
Author:邢开开 |
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Description: An 8-QAM communications channel simulation in Simulink, constructed from a 16-QAM model and using an I,Q correlation receiver.
QAM (quadrature amplitude modulation) is a method of combining two amplitude-modulated (AM) signals into a single channel, thereby doubling the effective bandwidth. QAM is used with pulse amplitude modulation (PAM) in digital systems, especially in wireless applications. In a QAM signal, there are two carriers, each having the same frequency but differing in phase by 90 degrees (one quarter of a cycle, from which the term quadrature arises). One signal is called the ‘I’ signal, and the other is called the ‘Q’ signal. Mathematically, one of the signals can be represented by a sine wave, and the other by a cosine wave. The two modulated carriers are combined at the source for transmission. At the destination, the carriers are separated, the data is extracted from each, and then the data is combined into the original modulating information. -An 8-QAM communications channel simulation in Simulink, constructed from a 16-QAM model and using an I,Q correlation receiver.
QAM (quadrature amplitude modulation) is a method of combining two amplitude-modulated (AM) signals into a single channel, thereby doubling the effective bandwidth. QAM is used with pulse amplitude modulation (PAM) in digital systems, especially in wireless applications. In a QAM signal, there are two carriers, each having the same frequency but differing in phase by 90 degrees (one quarter of a cycle, from which the term quadrature arises). One signal is called the ‘I’ signal, and the other is called the ‘Q’ signal. Mathematically, one of the signals can be represented by a sine wave, and the other by a cosine wave. The two modulated carriers are combined at the source for transmission. At the destination, the carriers are separated, the data is extracted from each, and then the data is combined into the original modulating information. Platform: |
Size: 11264 |
Author:Griffin Wright |
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Description: 用Matlab产生一个频率为1Hz、功率为1的余弦信源，设载波频率为10Hz，并画出：
1.DSB调制信号及其功率谱密度；
2.将已调信号解调，在时域内将解调后的波形与原信号进行对比；
3.A=2的AM调制信号及其功率谱密度；
4.SSB调制信号及其功率谱密度；
5.在信道中各自加入经过带通滤波器后的窄带高斯白噪声，功率为0.1，解调各个信号，并画出解调后的波形。
-Matlab produce a frequency for 1 hz, power for 1 cosine source, a carrier frequency for 10 hz and draw the:
1. The DSB modulation signal and power spectral density
2. Will be modulated signal demodulation, in the time domain waveform and the demodulation of the original signal are compared
3. A = 2 AM modulation signal and power spectral density
4. SSB modulation signal and power spectral density
5. In the channel of each join after bandpass filter after the narrow band gaussian white noise, power is 0.1, each signal demodulation, and draw the demodulation of waveform.
Platform: |
Size: 19456 |
Author:江晨城 |
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Search - AM modulated signal in matlab