Alternatives to Digital Processing and Demodulation for Standoff Sensors
Abstract
Our basic assumption is that previous linear and multi-resolution approaches have not yet accomplished the goal of accurately differentiating chaotic sources since previous analog approaches assume Hermitian symmetries (even magnitude and odd phase) in frequency, which chaotic sources lack. However, widely linear processing and complementary information can preserve Hermitian symmetries in frequency. This complementary information is not available from conventional magnitude-square or Hilbert envelope detection. Coherent methods preserve complementary information, yet with sensitivity hampered by quadrature synchronization errors. Our initial analysis shows that this complementary information is available via complementary detection which preserves the non-Hermitian symmetries in frequency, as are needed to differentiate, for example, communication signals from chaotic clutter or intentional noise sources.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Oct 30, 2018
- Source ID
- W911NF1510450
Entities
People
- Les Atlas
Organizations
- Army Contracting Command
- United States Army
- University of Washington