Time alignment of signals

摘要

Envelope-type signals are detected for the input and output of a linearised amplifier (12). The variance of the signal obtained from the output is measured and a variable delay (24) between the detected signals is adjusted to minimise the variance. The value of the variable delay then gives the propagation delays through the linearised amplifier. Further envelope-type signal from the output and interpolation can be used to enhance the adjustment of the delay to minimise variance.