Accession Number : ADA267376


Title :   Nonlinear Methods for Communications


Descriptive Note : Final rept. 1 Sep 90-31 Aug 92,


Corporate Author : LORAL WESTERN DEVELOPMENT LABS SAN JOSE CA


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267376.pdf


Report Date : 31 Aug 1992


Pagination or Media Count : 187


Abstract : An innovative communication system has been developed. This system has the potential for improved secure communication for covert operations. By modulating data on the chaotic signal used to synchronize two nonlinear systems, they have created a Low Probability of Intercept (LPI) communications system. The researchers derived the equations which govern the system. Made models of the system and performed numerical simulations to test these models. The theoretical and numerical studies of this system have been validated by experiment (5,21-25). A recent design improvement has led to a system that synchronizes at 0 db Signal-to-Noise. This development holds the promise of a Low Probability of Detection (LFD) system.


Descriptors :   *NONLINEAR SYSTEMS , *COVERT OPERATIONS , *SECURE COMMUNICATIONS , TEST AND EVALUATION , MATHEMATICAL MODELS , SIMULATION , DETECTION , NOISE , DATA RATE , SIGNALS , CHAOS , PROBABILITY , SIGNAL TO NOISE RATIO , PROBLEM SOLVING


Subject Categories : Radio Communications


Distribution Statement : APPROVED FOR PUBLIC RELEASE