幅度调制和相位调制之间的区别

先决条件–调制

1.调幅：
幅度调制是一种调制，其中载波的幅度根据保持相位和频率恒定的调制信号的瞬时幅度而变化。修改载波的幅度以便发送数据或信息。它可以远距离传输，范围大。它的调制指数从0到1不等。在幅度调制中，频率和相位保持不变。

2.相位调制：
相位调制是一种调制，其中载波的相位根据调制信号的瞬时幅度而变化，并保持幅度和频率恒定。相位调制和频率调制相似，但是在相位调制中，载波信号的频率没有增加。相位调制用于移动系统中。修改载波的相位，以便发送数据或信息。

幅度调制和相位调制之间的区别：

S.NO.	Amplitude Modulation	Phase Modulation
1.	In Amplitude Modulation, the frequency remains the same.	In Phase Modulation, the amplitude remains the same.
2.	It has simple circuit.	It has complex circuit.
3.	Its modulation index varies from 0 to 1.	Its modulation index is always greater than one.
4.	Noise immunity is poor than in PM.	Noise immunity is better than in AM.
5.	In Amplitude Modulation, the phase remains the same.	In Phase Modulation, the frequency remains the same.
6.	Amplitude Modulation is widely used.	Phase Modulation is used in mobile system.
7.	Signal to noise ratio is better than Phase Modulation.	Signal to noise ratio is poor than Amplitude Modulation.
8.	The amplitude of the carrier wave is modified in order to send the data or information.	The phase of the carrier wave is modified in order to send the data or information.
9.	In AM, received signal is of low quality.	In FM, received signal is of high quality.
10.	It has better sound quality.	It has poor sound quality.