Date: Fri, 21 Nov 1997 01:30:12 GMT Server: Apache/1.2b7 Connection: close Content-Type: text/html Last-Modified: Wed, 23 Apr 1997 20:02:38 GMT ETag: "4944f6-106e-335e6ade" Content-Length: 4206 Accept-Ranges: bytes
Strategic military and civilian assets face increasingly severe threats from ballistic missiles, cruise missiles, rockets, UAVs and low observables. Detection of modern enemy threats requires wideband radar waveform systems offering increased detection range, large search volumes, shallower scan angles, higher detection probabilities and enhanced target identification and discrimination, often in the presence of high clutter and sophisticated ECM. Processing these wideband radar returns for real-time target acquisition is a daunting processing challenge.
Essex Corporation, under contract to the U.S. Army, is developing a wide bandwidth range-Doppler imager (RDI) using optoelectronic technology. This processor is a hybrid optoelectronic device that combines the high speed of analog optics with the advantages of digital electronic processing to provide real-time, high dynamic range processing of instanteously wideband radar signals of arbitrary modulation.
Short term cross power spectral densities (STCP) are generated in an opto-electronic module. These functions are two-dimensionally Fourier transformed to produce complex range-Doppler maps known as cross ambiguity functions (CAF). Signals of arbitrarily wide bandwidth can be processed by channelizing the radar reference and return signals into sub-bands, generating an STCP for each band and concatenating to create a wideband STCP which is Fourier transformed to produce a wideband CAF.
A block diagram of the Essex RDI processor is shown below. One or two signals can be input to the processor for linear or quadratic processing.
Call 800-53ESSEX and ask for Matt Bechta, Vice President, to discuss your application or special needs.