Multiwindow Post-Doppler Space-Time Adaptive Processing

Abstract

Advanced airborne radars must perform target detection in the presence of interference and heavy clutter, Space-time adaptive processing (STAP) refers to a class of adaptive filtering techniques that simultaneously rocess the spatial signals from an antenna .array and d e temporal signals from multiple pulses an order to suppress both jammin and clutter. A reduceddimension suboptimum STh' architecture utilizing multi le dop ler filter banks on each element is suggestel Digrent methods for choosing the doppler filters are considered and a condition which yields minimum clutter r a d is derived. PRI-staggered postdop ler meets the condition and rovides both ezcellent per6rmance with few degrees orfreedom and the abili t y to maintain low adapted doppler sadelobes. Adjacent bin post-doppler re uires more de rees of freedom when low doppler sidelo%es are desire!