Abstract
The positioning mean square error (MSE) prediction theory for dual Mach–Zehnder
interferometric vibration sensor is proposed. The cross-correlation algorithm is
considered. By taking into account the general noise time delay model, the impact of
each noise term in output interference signal to ultimate positioning MSE is to our
knowledge the first time be analyzed. An equivalent signal to noise ratio term for
general noise time delay model is derived. It shows that incoherent phase noise (coming
from polarization fading effect) makes an equivalent contribution to positioning MSE as
additive noise under assumptions. In practical prediction, cross-correlation coefficient
between two channel signals can be used to estimate positioning MSE. Simulation as well
as experimental results are presented to corroborate the theory.
© 2010 IEEE
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