Non Co-Operative Detection of LPI/LPD Signals Via Cyclic Spectral Analysis.
AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING
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This research proposes and evaluates a novel technique for detecting LPILPD communication signals using a digital receiver primarily designed to detect radar signals, such as a Radar Warning Receiver RWR or an Electronic Support Measures ESM receiver. The proposed Cyclic Spectrum Analysis CSA receiver is a robust detector that takes advantage of the spectral correlation properties of second-order cyclostationary signals. A computationally efficient algorithm is used to estimate the Spectral Correlation Function SCF. Using state-of-the-art FFT processing, it is expected that the proposed CSA receiver architecture could estimate the entire cyclic spectrum m approximately 0.6 ms. The estimate is then reduced to an energy related test statistic that is valid for all cycle frequencies within the receiver bandwidth. By producing an estimate of the cyclic spectrum, the CSA receiver also benefits post-detection tasks such as signal classification and exploitation. As modeled, the ideal CSA receiver detection performance is within 1.0 dB of the radiometer in benign signal environments and consistently outperforms the radiometer in adverse signal environments. The effect on detection performance when the CSA receiver is implemented with channelized and quadrature digital receiver architectures is also examined.
- *SIGNAL PROCESSING
- *ELECTRONIC WARFARE
- *SPECTRUM ANALYSIS
- DIGITAL SYSTEMS
- ADVERSE CONDITIONS
- RADAR RECEIVERS
- COMMUNICATION AND RADIO SYSTEMS
- RADAR SIGNALS
- ELECTRONIC SUPPORT MEASURES
- WARNING SYSTEMS
- Atomic and Molecular Physics and Spectroscopy