The phase noise is usually specified, depending on the carrier offset, as a single-sideband phase noise referenced to the carrier offset.
相位噪声总是具体的， 取决于载波偏移， 作为相对于载波偏移的一个单边带噪声。
2
This paper discussed the double sidebandnoise figures and single side band noise figures of the superheterodyne receivers in a ideal hypothesis and the practical case respectively.