| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: invention relates to communication engineering and can be used in optical communication systems. The invention provides a method and an apparatus for detecting in-band optical signal-to-noise ratio (OSNR), the method comprising steps of: determining power Pof a first optical signal at the transmitting side, power Pof a second optical signal at the transmitting side and overall power Pof the signal; determining the ratio k1 Pto Pand the ratio k2 Pto Pfrom P, Pand P; determining power P'of the first optical signal at the point of detection and power P'of the second optical signal at the point of detection; determining the ratio k3 P'to P'from P'and P'and determining the OSNR from k1, k2 and k3.EFFECT: high noise immunity of transmission.13 cl, 7 dwg |
