A review of 2D/3D IIR plane-wave real-time digital filter circuits

Progress is reviewed on the development of circuits that are well suited for the single-chip VLSI circuit realization of two dimensional (2D) and three dimensional (3D) infinite impulse response (IIR) spatio-temporal real-time digital filters. The distributed parallel processor (DPP) and the scanned-array (SA) vector processor circuit architectures are described. The DPP architecture requires the widely-used synchronously-sampled array of sensor signals and is especially useful for high-throughput applications. The SA architectures employ asynchronously-sampled input signals, require only one time-multiplexed A/D converter and are useful where especially low circuit complexity is required. Extensions of these architectures to elemental pre-distorted (EPD) versions lead to further reductions in circuit complexity. The 2D DPP and 3D SA circuits have been implemented on a single field programmable gate array (FPGA) device and tested on-chip via stepped hardware co-simulation They are useful for selectively filtering plane waves in real-time