Browse the AST Resource Center to find informative whitepapers, presentations, and other materials from AST's industry experts.

• White Papers
  
  Communications Support
  FDM-TDM Digital Transmultiplexer
  Treichler, John R., An Introduction to the FDM-TDM Digital Transmultiplexer , July 1991
  
  
  FIR Filters
  Treichler, John R., Notes on the Design of Optimal FIR Filters, November 1989
  
  
  Group 3 Fax Set-up Protocol
  Treichler, John R., Interpreting the Group 3 Fax Set-up Protocol, May 1988
  
  
  Digital Microwave Radio
  Gooch, Richard, Brian Sublett, and Tim Geyer, An Adaptive Nulling System for Digital Microwave Radio, March 2000
  
  
  Satellite Bandwidth Compression
  Applied Signal Technology has licensed its patented DoubleTalk™ technology to Comtech EF Data Corporation for use in their new CDM-Qx satellite modem. The CDM-Qx with DoubleTalk provides unprecedented savings for operators of point-to-point satellite links, and is available from Comtech today. The following papers describe the product performance, and the value of their version of DoubleTalk, called Carrier-in-Carrier™.
  
  Weigel, Mark, DoubleTalk™ Carrier-in-Carrier™ Performance Characterization , December 2005
  
  DoubleTalk™ Carrier-in-Carrier™ Bandwidth Compression Providing Significant Improvements in Satellite Bandwidth Utilization , September 2004
  
  
  Oceans 2005 Conference
  
  Campbell, James D. and Enson Chang, Concepts for Synthetic Aperture Sonar Performance Prediction and Mission Planning 
  
  Harbaugh, J. Kent, Daniel D. Sternlicht, Angela Putney, Mark D. Tinkle, and Eugene M. Lavely, Acoustic Modeling for Sea Mine CAD/CAC Development
  
  Putney, Angela and Richard H. Anderson, Reconstruction of Under-sampled SAS Data Using the WIPE Algorithm  
  
  
  22nd Asilomar Conference on Signals, Systems, and Concepts, October 31-November 2, 1988
  Gooch, Richard P. and Brian J. Sublett, Joint Spatial and Temporal Equalization in a Decision-Directed Adaptive Antenna System
  
  
  25th Asilomar Conference on Signals, Systems, and Computers, November 4-6, 1991
  Gooch, Richard P., Christine Jorgensen, and Michael J. Ready, The Demod-Remod Technique for Demodulating Cochannel FSK Signals
  
  
  32nd Asilomar Conference on Signals, Systems, and Computers, November 2-5, 1998
  Brown, D.R., D.L. Anair, C. Johnson Jr., Fractionally Sampled Linear Detectors for DS-CDMA
  
  Chung, Wonzoo and C. Johnson Jr., Characterization of the Regions of Convergence of CMA Adapted Blind Fractionally Spaced Equalizer
  
  Ready, Michael J. and Jeff Harp, Performance Improvements Achieved by Equalizing Intermediate Rate FSK Signals
  
  Schniter, Phil and C. Johnson, Jr., Dithered Signed-Error CMA: The Complex-Valued Case
  
  
  31st Asilomar Conference on Signals, Systems, and Computers, November 2-5, 1997
  Endres, T., J. Behm, C. Prettie, C. Johnson Jr., Characterization of Empirically Derived Time-Varying Channel Models with Implications for Blind Equalization and Identification
  
  Leary, Jonathan, Least-Squares Multi-user CM Array: A New Algorithm for Blind Adaptive Beamforming
  
  Ready, M. J., M. Downey, and L. Corbalis, Automatic Noise Floor Spectrum Estimation in the Presence of Signals
  
  Treichler, J.R., M.G. Larimore, J.C. Harp, Practical Implementations of Blind Demodulators
  
  Wang, A.K. and Jonathan Leary, SMI Based Beamforming Algorithms for TDMA Signals
  
  
  DS and Multimedia Technology, May-June, 1998
  Ready, Michael J. and Brian Bedrosian, System Architectures for Narrowband Reconnaissance Receivers and Beamforming Applications 
  
  
  IEEE International Conference on Acoustics, Speech, and Signal Processing, April 11-14, 1988
  Gooch, Richard P. and Brian J. Sublett, A Multimode Adaptive Beamformer for Quadrature-Amplitude-Modulated Signals
  
  
  IEEE International Conference on Acoustics, Speech, and Signal Processing, May 23-26, 1989
  Gooch, Richard P. and Brian J. Sublett, Demodulation of Cochannel QAM Signals 
  
  
  MILCOM 1989, Session 37.1
  Gooch, Richard P., Brian J. Sublett, and Robert Lonski, Adaptive Beamformers in Communications and Direction Finding Systems