Image acquired by an electro-optical system is spatially prefiltered by the optics, than
sampled by the detector and finally postfiltered digitally during image processing. A
method is presented for maximizing system performance by derivation of an optimal
Whitening Matched post-Filter (WMF). The derivation of the WMF is based on combining
clutter aliasing, misregistration, detector noise and target aliasing into a unified 'colored'
noise. Further system optimization is achieved by modification of the optical point spread
function (prefilter) so 'sampling balanced' configuration is achieved. In this configuration
undersampling noise mechanisms (Aliasing and misregistration) and oversampling noise
mechanisms (detector noise) are balanced to contribute equal magnitude. The performance
of sampling-balanced system having WMF is compared to conventional systems for point
target detection. It is shown that this system is the optimal and most robust in case of
variations in scenario parameters.
The following paper analyzes a dispersion management technique for improved transmission fiber performance using high-order mode optical physics technology. Test results indicate that high-order mode technology precisely manages chromatic dispersion to enable high-capacity, long-haul and ultra long-haul optical networks.
In a 4Ogbit/sec transmission test through 240 km of a TrueWave Classic fiber, with
dispersion compensated by a high-order mode Dispersion Management Device, the
bit error ratio was under 10b0 across the band of 1530nm through 1560nm. In a
stimulated Brillouin scattering test, a light power of up to 22dBm was launched into
the high-order mode Dispersion Management Device without detecting the SBS
threshold. These tests and others indicate that the high-order mode Dispersion
Management Device enables high transmission rates in long-haul networks.