G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/45 (2006.01) G01C 19/64 (2006.01) G01D 5/244 (2006.01) G01D 5/26 (2006.01) G01D 5/353 (2006.01) G08C 15/00 (2006.01) G08C 23/06 (2006.01) H04B 10/08 (2006.01)
Patent
CA 2306681
Quadrature signals Q and in-phase signals I output from a pathlength mismatched interferometric sensor array (10) are normalized by sampling the signals to obtain a first set of values Q k = Q0B k sin .PHI.k corresponding to the sine of the phase shift and a second set of values I k = I0B k cos .PHI.k corresponding to the cosine of the phase shift where k is a running index of the set of consecutive samples of Q and I. A quantity DQ k = (see formula I) is calculated for the quadrature signals; and a quantity DI k = (see formula II) is calculated for the in-phase signals, where u(k) and s(k) are parameters used to determine indices that select specific sampled signals and k is a running index of the set of consecutive samples of Q and I. The normalization factor is then calculated as the ratio R = (see formula III) where Q N = (see formula IV) and I N = (see formula V).
Gowling Lafleur Henderson Llp
Litton Systems Inc.
LandOfFree
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