High-fidelity sensing
CommsAudit V/UHF recievers configured in phase-coherent mode sit at the heart of the SRDF system, offering high dynamic range and low noise figure for critical COMINT, spectral compliance and intelligence gathering operations
Spectra SRDF has Industry leading DF bandwidth, coupled with CommsAudit’s proprietary Super Resolution DF processing software. CommsAudit’s Super-Resolution Direction Finding (SRDF) processing enables prosecution of the co-channel and short duration signals, critical for operations in a congested and contested Electromagnetic Environment.
The Super-Resolution Direction Finding (SRDF) capability delivers high-accuracy DF solutions on both Azimuth (‘Line of Bearing’) and (optionally) Elevation of multiple target emissions, even if those emissions are transmitting on the same frequency at the same time.
This method of DF, known as ‘N-channel’ allocates a separate phase coherent receiver channel for each available antenna element. In the Spectra SRDF system a 5-element antenna array is used with five receiver channels being processed by three CommsAudit V/UHF receivers to form each ‘Direction-Finding Digital Drop Receiver’ (‘DF-DDR’).
The SRDF system architecture offers superior detection and DF of short duration signals with each antenna element being sampled continuously. This approach will produce excellent results against short duration emissions with single-digit micro second detection and DF with against high rate frequency hoppers and burst signals.
This powerful capability is particularly suited to tactical surveillance operations, as immediate knowledge of a target emitter’s elevation relative to the Spectra DF Antenna Array will act as a real-time tactical indicator to enhance the User’s Situational Awareness.
The Spectra family of DF systems is inherently modular, and can be tailored to a specific requirement or mission profile.
The Spectra SRDF system is no different, and various antenna and DF processing form-factors can be combined to create a system suitable for fixed-site install, land/maritime platform operations or portable use.
Designed for a congested, contested environment
Future EW operations are expected to be undertaken in a congested and contested electromagnetic environment. These broad terms imply two specific challenges for EW sensors, principally, dynamic range and co-channel interference.
Co-channel interference (i.e. more than two signals occupying the same frequency at the same time) is a condition under which simple DF processing (e.g. Watson-Watt, two-channel Correlative interferometric) techniques fail.
CommsAudit’s super resolution processing is designed to deliver reliable direction-finding results in the presence of co-channel interference. Additionally, it makes provision for dynamic spatial filtering (by beam-forming and null-steering) of wanted/unwanted emissions, enabling successful collection of SOI under co-channel conditions. The multi-channel architecture enables prosecution of multiple SOI in parallel, each with independently configured beam/null configurations.
A further benefit of the CommsAudit’s Super Resolution system architecture is superior detection & DF of short duration signals. Each antenna element is a sampled continuously without switching or sequencing. This approach yields superior POI for short duration emissions e.g. high rate frequency hopping signals or burst signals. CommsAudit has previously demonstrated single-digit micro second (µS) detection and DF with pulse widths in the region 7-9 µS.
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