ASK、FSK、PSK哪种信号的发送需要波成型

ASK (Amplitude Shift Keying) 信号的发送需要波形成型。因为ASK是一种基于振幅变化的调制方式，它需要将数字信号转换成相应的模拟振幅信号。在数字信号中，只有两个离散的值（0和1），而模拟振幅信号是连续变化的。因此，需要用到波形成型技术，将数字信号转换成连续的模拟振幅信号。通常，可以使用正弦波或方波作为载波信号，通过调节其振幅来实现ASK调制。

FSK (Frequency Shift Keying) 和 PSK (Phase Shift Keying) 信号的发送则不需要波形成型。FSK是一种基于频率变化的调制方式，它不需要将数字信号转换成模拟振幅信号，而是直接改变载波信号的频率。在FSK调制中，可以通过切换不同频率的载波信号来实现数字信号的传输。

PSK是一种基于相位变化的调制方式，它也不需要进行波形成型。在PSK调制中，数字信号被转换成相应的相位信号，然后被直接叠加到载波信号上。通过改变数字信号的相位，可以对载波信号进行相应的相位调制，从而实现数字信号的传输。

相关问题

ask fsk psk

As an AI language model, I can answer your question about FSK and PSK.

FSK stands for Frequency Shift Keying, which is a modulation technique that uses different frequencies to represent digital data. In FSK, the frequency of the carrier signal is shifted between two or more discrete values, depending on the digital signal being transmitted.

PSK stands for Phase Shift Keying, which is a modulation technique that uses different phases to represent digital data. In PSK, the phase of the carrier signal is shifted between two or more discrete values, depending on the digital signal being transmitted.

Both FSK and PSK are commonly used in digital communication systems, such as radio, television, and satellite communication. They are also used in digital data storage systems, such as CDs and DVDs.

ask fsk psk matlab

Sure, I'd be happy to help with any questions you have regarding FSK, PSK, and MATLAB.

FSK stands for "Frequency Shift Keying", which is a modulation technique used in digital communication systems to transmit digital information over a carrier wave. In FSK, the carrier frequency is shifted between two or more frequencies to represent different bits of information.

PSK stands for "Phase Shift Keying", another modulation technique used in digital communication systems. In PSK, the phase of the carrier wave is shifted to represent different bits of information.

MATLAB is a software platform commonly used in engineering and scientific research for data analysis, modeling and simulation, and algorithm development. It has built-in functions for simulating and analyzing digital communication systems using FSK and PSK modulation techniques.

If you have any specific questions or problems related to FSK, PSK, or MATLAB, feel free to ask and I'll do my best to assist you.