METHOD FOR CHANNEL-BY-CHANNEL ADJUSTMENT OF THE TRANSMITTED SIGNAL POWER LEVELS IN A WAVELENGTH-DIVISION MULTIPLEX TRANSMISSION SYSTEM

摘要

The corresponding transmission signal power levels (Ptx(i)) are adjusted for exact level balance or signal-to-noise ratio balance of received signals (E1 to En). If the dynamic range is surpassed, individual transmission signal outputs are compressed, wherein the transmission signal summation power is maintained at least at an almost constant level.