什么是带内相位噪声？

请教各位：最近看PLL的论文，发现2个概念，不太明白，请高人解释一下。closed-in phase noise 和 inband integrated phase noise。他们有区别吗?代表什么意义?谢谢！

of course,
closed-in phase noise: the PSD in pll closed loop bandwidth
inband integrated phase noise: the integrated noise from 0 to closed loop bandwidth