L-3 Communications Integrated Systems L.p.

L-3 Integrated Systems Company

Ross A McClain, Jr

Gerald Lothair Fudge

Steven D Thornton

Brian C Rutherford

Benjamin A Collins

E Scott Baker

Systems and methods for generating pulsed output signals that employ a gated RF oscillator circuit having an output that is switchably grounded through the emitter of a transistor and including feedback from the output of the circuit to the base of the transistor to create oscillations and to allow a digital input pulse of a desired length to control the start and stop of oscillations created by the transistor.

Systems and methods for generating pulsed output signals using a gated RF oscillator circuit

A signal of interest (SOI) may be selected from among a plurality of cochannel signals based on one or more internal or external structural feature/s of the SOI, e.g., automatically selected based on any one or more internal or external structural features of the SOI that is known a priori. Examples of such internal structural features include, but are not limited to, number, frequency and/or absolute or relative signal strength (signal to noise ratio) of one or more transmitted signal components (e.g., pilot tones, squelch tones, etc.) present in the SOI; absence of a signal component at a given frequency in the SOI (i.e., present as a 'dead spot' at a given frequency within the SOI); signal strength versus frequency profile of the SOI, signal strength versus time domain profile of the SOI, transient characteristics, time versus frequency profile, etc.

Methods and systems for signal selection

Systems and methods for analog to digital conversion that may be implemented using a digital to analog converter (DAC) to provide negative feedback to at least Partially cancel one or more signals (e.g., one or more interfering signals present with one or more desired signals, one or more strong desired signals, etc.) at the analog input of an analog to digital converter (ADC), and that may be used to extend the effective dynamic range of an ADC. The effective dynamic range of an ADC may be extended by detecting and isolating signals and using digital adaptive digital filtering along with a digital to analog converter (DAC) to provide negative feedback to cancel the signal/s at the input of the ADC.

Systems and methods for analog to digital conversion

Systems and methods for analog to digital conversion that may be implemented using a digital to analog converter (DAC) to provide negative feedback to cancel signals at the input of an analog to digital converter (ADC), and that may be used to extend the effective dynamic range of an ADC. The systems and methods may be implemented in multi-channel environments.

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Greenville, TX, United States of America

Ross A McClain, Jr