The practical implementation of any sensing platform is susceptible to imperfections.
This "mismatch" or difference between the assumed and actual sensor
configuration can significantly impact system performance.
Mismatch can have several contributing factors: imperfections in the manufacturing
of system components, and incomplete or erroneous knowledge of the physical
environment or system configuration. All arrays are susceptible to perturbations
in array element locations, however vector sensor arrays are also sensitive
to changes in sensor orientation. This is due to the fact that the particle
motion measurement of the vector sensor must be placed in a global reference
frame. This talk will present a performance analysis of vector sensor arrays
with perturbations in filter phase/magnitude and element position/orientation
using a Gaussian perturbation model. The effect on array gain will be analyzed
using common ocean noise models. Theoretical expressions are derived for array
data covariance matrices under these noise models. Similarly, the effect of
mismatch on the beampattern is analyzed, including expressions for the mean
and variance of the vector sensor array spatial response.