General Dynamics Decision Systems, Inc.

General Dynamics C4 Systems, Inc.

Eric Jay Clelland

Kenneth Solomon Wreschner

Robert Lee Trapp

Keith Petticrew

Christopher Bingham Johnson

Chad Rhamy

A robust and flexible system for signal parameter measurements in the field of signal processing dynamically uses signal parameters from previous signal detections and parametric priorities to adaptively control and process the signal in an efficient and reliable manner. The system provides for improved fine grain signal parameter measurements through the use of adaptive arbitration to control signal processing. The system improves measurement accuracy for various signal characteristics including pulse width, amplitude, frequency and timing information. The system also provides signal parameter measurements while requiring less power, size, and weight than conventional systems.

System and method for adaptive matched filter signal parameter measurement

A method and apparatus for adaptive signal compression of unknown signals uses minimal power and bandwidth to transmit data. The method provides adaptive signal compression with minimal loss and distortion by extracting only information of interest and recreating the full signal. The method uses a single resolution filter bank for channelizing a data stream for transmission. The method removes unwanted or unneeded information before transmitting the data by using fidelity and user controls and detection capabilities. The method provides significant signal compression where signals are sparse in frequency, time, or both and does not rely on a priori knowledge of the signal. After transmission, the system generates a signal using the data received as well as filling in the non-transmitted portions of the signal by manipulating the transmitted data. The system then formats the signal into the original data stream using a reconstruction filter bank.

Method and apparatus for adaptive signal compression

An active signal suppression system utilizes multi-rate recombinant transmultiplexer ( ) to suppress or cancel an undesired signal ( ) from a wideband composite signal ( ) to be applied to an analog to digital converter ( ). The transmultiplexer ( ) includes a first demultiplexer ( ), multiplier ( ), switch ( ), and multiplexer ( ). The demultiplexer and multiplexer each have a poly phase filter and Fast Fourier Transform pair which permit channelization and facilitate the generation of a cancellation signal ( ) for suppression of the undesired signal. Signal cancellation circuit ( ) receives the composite signal ( ) at one input ( ) and the cancellation signal ( ) at another input ( ). A minimum mean square estimation circuit (MMSE) ( ) and a second demultiplexer ( ) are included in a feedback circuit to provide error correction. A detector and automatic gain control circuit ( ) is coupled to the first demultiplexer ( ) and the multiplier ( ) to detect the undesired signal ( ) for controlling the switch and to provide automatic gain control to a variable gain amplifier ( ) connected to the signal cancellation circuit.

Active interference suppressor utilizing recombinant transmultiplexing

A transmitter ( ) offsets the transmission time and frequency of a burst transmission such that uncertainties in reception time and reception frequency are reduced. The transmitter includes an ephemeris store ( ) that includes ephemeris data for one or more possible intended receivers ( ). Orbits of possible intended receivers are propagated, and an intended receiver is selected. Transmission time offsets are generated as a function of transmitter location and intended receiver location. Transmission frequency offsets are substantially equal to a Doppler frequency derived from the transmitter velocity and the intended receiver velocity. Guard times and guard bands are reduced in size, resulting in greater available communications bandwidth and simpler receiver designs.

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Tempe, AZ, United States of America

Eric Jay Clelland