With any signal you can talk about two speeds called the phase velocity and the group velocity.
With any signal you can talk about two speeds called the phase velocity and the group velocity.
对于任何信号都有两个速度即相速度和群速度。
With any signal you can talk about two speeds called the phase velocity and the group velocity.
对于任何信号都有两个速度即相速度和群速度。