SBIR-STTR Award

Specific Emitter Identification (SEID) systems have been implemented using narrow hand receivers with fine grained Pulse Repetition Interval (PRI) analysis. The analysis produces a PRI signature on an emitter such that the same emitter is uniquely distinguished from another of the same type, allowing a user to associate an emitter to a specific platform. Using a narrow band tuner for this analysis isolates the emitter of interest from other signals in the environment and allows it to be processed individually. This step reduces the burden of existing processors so that detailed analysis can be performed. Current state-of-the-art processing and wide band architectures may allow that one or more emitters of interest be analyzed for SEID date at the same time. The analysis may also be performed by processors already tasked to provide other ESM functions. This capability, if added to existing wide band threat warning systems, would strengthen the ESM posture of the host platform without adding any weight, power, size, or additional recurring hardware cost to the platform. The objective is to determine the utility of a wide band radar receiver architecture in performing SEID functions.

Keywords:
SEID, Wide Band, Radar Receiver, PRI Analysis, Digital Frequency Discriminator, DFD, UMOP, HPI

A major factor in the tactical usefulness of electronic support measures (ESM) is the ability to identify the origin of intercepted signals of interest (SOI); the more specific the identification the better. Specific emitter identification (SEID) is the capability to match signals of interest to an individual asset within the electronic order of battlel, not merely to an emitter type, and is most useful in the cases of emitters mounted on mobile platforms such as ships or land vehicles. Traditionally, this capability has relied on precise measurement of the pulse repetition interval (PRI) through fine grained analysis with dedicated narrow band receivers. Phase I of this SBIR investigated application of SEID techniques to modern, automatic wideband receivers. It was determined that while PRI-based SEID is still useful with respect to legacy systems, new SEID techniques involving unintentional modulation-on-pulse (UMOP) are necessary against modern emitters. The Phase I also demonstrated a working interface between a wideband receiver and a UMOP SEID system. The Phase II effort described in this proposal would embed both methodologies into the existing Bobcat wideband ESM receiver-processor and support operational test and evaluation to yield a service approved system.

Keywords:
Specific Emitter Identification Seid Esm Wideband Rf Umop Modulation On Pulse Pri Pul