Accession Number : ADA303518

Title :   Computer Simulation of Soliton Interference Rejection Filter.

Descriptive Note : Final rept. Jul-Nov 95,

Corporate Author : ARMY RESEARCH LAB FORT MONMOUTH NJ

Personal Author(s) : Himmel, Jeffrey ; Kosinski, John

PDF Url : ADA303518

Report Date : DEC 1995

Pagination or Media Count : 42

Abstract : A soliton interference rejection filter which was recently proposed has been simulated with EEsof's Libra on a Sparc workstation. The filter depends on the use of solitons which are linearly independent in a nonlinear LC network. Such a filter would use the well-known sinusoidal recurrence phenomenon of solitons to separate, in time, a desired signal from a stronger undesired signal and conduct the undesired signal to ground at a specific location in the network. It was also suggested that the filter might change the harmonic content of only the undesired signal in order to decrease the amplitude of its fundamental. However, the computer simulations showed that multiple signals in a non- linear network do not become linearly independent solitons. It was also demonstrated that the ratio of the amplitudes of the desired and interfering fundamentals do not significantly change, regardless of what happens to the higher harmonics. The frequency and amplitude dependence of sinusoidal recurrence make it necessary to know a priori the frequencies and amplitudes of the incoming signals, which is unrealistic in a real communication system. Inter-modulation interference was also demonstrated. Thus, it was shown that a soliton interference rejection filter is not feasible. (AN)

Descriptors :   *SIGNAL PROCESSING, *SOLITONS, MATHEMATICAL MODELS, COMPUTERIZED SIMULATION, FOURIER TRANSFORMATION, SECOND HARMONIC GENERATION, WAVEFORMS, INPUT OUTPUT PROCESSING, VOLTAGE, TRANSMISSION LINES, NONLINEAR SYSTEMS, COMMUNICATIONS NETWORKS, INTERFERENCE, ELECTROMAGNETIC WAVE FILTERS, AMPLITUDE, INTERMODULATION, ELECTRICAL NETWORKS, NOISE(ELECTRICAL AND ELECTROMAGNETIC).

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE