An optical system, comprising a detection unit for detecting an input signal power profile; an algorithm unit for acquiring information of the input signal power profile and calculating a set of optimal control parameters for an EDFA along a link of the optical system; a link controller for acquiring the information of the set of optimal control parameters of the EDFA and configuring the EDFA.

Disclosed is a method by which a terminal transmits a signal in a wireless communication system. The terminal can receive configuration information for setting a first subcarrier spacing (SCS) for a plurality of slots, and transmit a physical sidelink shared channel (PSSCH) in the plurality of slots. At this time, if the terminal coexists with a legacy terminal in a co-channel and the plurality of slots fully overlap a legacy subframe of the legacy terminal, second transmission power in at least one slot that excludes a first slot from among the plurality of slots can be limited by means of first transmission power of the first slot.

Device and methods for real-time polarization-dependent loss monitoring at coherent transceivers. In one embodiment, there is provided a method of monitoring a polarization dependent loss (PDL) of a signal during transmission through an optical communication link, the method comprising: receiving the signal by a coherent receiver, the received signal being subjected to one or more impairments in Amplifier Gain Control (AGC) mode, the one or more impairments including PDL; estimating an AGC gain effect of the AGC mode; compensating for the AGC gain effect in the received signal; determining the PDL from the compensated signal; and reporting the PDL.

Disclosed is a method by which a terminal transmits a signal in a wireless communication system. The terminal can receive configuration information for setting a first subcarrier spacing (SCS) for a plurality of slots, and transmit a physical sidelink shared channel (PSSCH) in the plurality of slots. At this time, if the terminal coexists with a legacy terminal in a co-channel and the plurality of slots fully overlap a legacy subframe of the legacy terminal, second transmission power in at least one slot that excludes a first slot from among the plurality of slots can be limited by means of first transmission power of the first slot.

Disclosed are a control method and an optical fiber amplifier. The optical fiber amplifier is configured to execute the control method. The method comprises: initially adjusting a target gain on the basis of a first offset gain to obtain the post-initial-adjustment target gain; when the actual power of the pump laser reaches target power determined on the basis of the post-initial-adjustment target gain, obtaining, on the basis of a first signal optical power and a second signal optical power, a second offset gain and a first offset slope through calculation; adjusting again the post-initial-adjustment target gain according to the second offset gain to obtain a adjusted target gain; and adjusting a target slope according to the first offset slope to obtain a adjusted target slope. This solution can provide high precision control for the gain and the slope of the optical fiber amplifier.

Disclosed is a method by which a terminal transmits a signal in a wireless communication system. The terminal can receive configuration information for setting a first subcarrier spacing (SCS) for a plurality of slots, and transmit a physical sidelink shared channel (PSSCH) in the plurality of slots. At this time, if the terminal coexists with a legacy terminal in a co-channel and the plurality of slots fully overlap a legacy subframe of the legacy terminal, second transmission power in at least one slot that excludes a first slot from among the plurality of slots can be limited by means of first transmission power of the first slot.

A method for wireless communication by a user equipment (UE) includes predicting a future gain state and a gain state transition in the UE based on a number of previous power levels of a received signal. The method also includes modifying a dynamic quantized gain state table, based on the predicting, to cover a likely dynamic range of the received signal. The method further includes switching gain states in accordance with the modified dynamic quantized gain state table.