Iterative Fourier transform algorithms generate preliminary phase spectrum functions to control spatial light modulators.
A detection unit processes electrical signals from different phases to enhance measurement accuracy.
Comparing average input and output power drives a heater to correct temperature drift, stabilizing the resonant frequency of optical modulators.
Monitoring chromatic dispersion rate of change identifies unreliable optical link performance measurements caused by temporary signal fluctuations.
Segmented traveling wave optical modulators use inter-segment amplifiers to counteract frequency-dependent transmissivity and propagation loss.
A measurement apparatus calculates nonlinear noise-to-power ratios using band-notch signals with varying widths to determine real signal impairment.
Orthogonal pseudo-random codes drive a bias controller that compensates for extinction ratio variations in Mach-Zehnder modulators.
Correlating waveforms from multiple locations determines dispersion coefficients, resolving the trade-off between measurement accuracy and system cost.
A wavelet transform generates a scalogram from OTDR waveforms to extract signal peaks for event identification.
Segmenting CPRI data and adjusting modulation formats based on channel quality reduces fade margin requirements, extending transmission distance.
A Polar code sub-channel mapping system allocates control information to specific channels based on user channel quality metrics.
Dynamic amplitude adjustment of the measuring signal resolves contradictions between measurement precision and data transmission performance.