L-3 Communications Corporation

L3 Technologies, Inc.

Other

Robert Holland

Elias Bonaventure Kpodzo

Yanhua Deng

Paul Dourbal

Paul R Prucnal

Andrew McCandless

Gary G Reber

An interference cancellation system (ICS) may be used with a communication system to prevent or minimize interference from one or more sources. The ICS may receive radio frequency (RF) signals comprised of one or more signals of interest (SOI) and multiple interfering signals. An interference estimation processor (IEP) may be used to estimate the one or more interfering signals. The interfering signals may be estimated using spatial and/or time diversity, which may be combined with statistical methods. The estimated interfering signals may be sent to the ICS, which may use the estimated interference signal to cancel the interference and output the SOI.

Remote interference cancellation for communications systems

Systems and methods for cancelling interference from a received signal in order to properly detect a signal of interest are disclosed. A combined signal of interest plus interference signal may be received. A copy or sample of the interference signal may be determined. The interference signal and the combined signal of interest plus interference signal may be converted to the optical domain. The interference signal may be optically phase shifted by &#x2212;180 degrees, which may result in an optically inverted interference signal. The optically inverted interference signal may be variably optically attenuated and/or variably optically time delayed, for example based on a detected output power of an optical subsystem of the interference cancellation system. As a result, interference cancellation of the interference signal from the combined signal of interest plus interference signal may be achieved, resulting in 50 dB or more of cancellation of the interference signal.

Interference cancellation system for cancelling interference in the optical domain

Systems and methods for cancelling interference while performing direction/location. A combined signal of interest plus interference signal may be received. A copy or sample of the interference signal may be determined. The interference signal and the combined signal of interest plus interference signal may be converted to the optical domain. The interference signal may be optically phase shifted by &#x2212;180 degrees, which may result in an optically inverted interference signal. The optically inverted interference signal may be variably optically attenuated and/or variably optically time delayed. As a result, interference cancellation of the interference signal from the combined signal of interest plus interference signal may be achieved, resulting in 50 dB or more of cancellation of the interference signal. Direction and/or location finding techniques can be applied to received signals during and/or after interference cancellation.

Interference cancellation system for location and direction finding

An interference cancellation system (ICS) may be used with a communication system to prevent or minimize interference from one or more sources. The ICS may receive radio RF signals comprised of one or more signals of interest (SOI) and multiple interfering signals. The ICS may use a sample of the interfering signals to cancel the interfering signals from the SOI. The multiple interfering signals may be converted into a single optical signal for cancellation. One or more optical cancellation paths may be used for interference cancellation. Each optical cancellation path may include an optical attenuator and/or an optical delay to achieve phase shifts and/or delays for interference cancellation.

Multiple interferer cancellation for communications systems

A method for enabling a person to apply gentle gravity traction to his spine by suspending his body by the arms while supporting some of his weight with his legs. The method, which is a modified form of 'long axis-extension' gravity traction, describes a procedure wherein a trained therapist designs and supervises a treatment program unique to the individual based on a number of factors. The patient is at all times able to control the amount of weight that is applied to the injured portion. The patient is instructed in carrying out a treatment program and monitored as to progress and possible changes to the program. An apparatus is disclosed that is uniquely designed for use with the method. It is preferably constructed entirely of wood except for fastener elements and may be assembled and disassembled quickly without the use of any tools.

Therapeutic traction apparatus and method

An apparatus for enabling a person to apply gentle gravity traction to his spine by suspending his body by the arms while supporting some of his weight with his legs. The apparatus is preferably constructed entirely of wood except for fastener elements and is designed to be assembled and disassembled quickly without the use of any tools. Included is a method of hanging from a support for treating an injured spine using a modified gravity traction procedure from that generally referred to as 'long axis extension.' A user grasps a support that has been positioned at a height such that he is able to maintain his spine and upper leg or thigh portions vertically aligned and with his lower leg portions horizontal to the floor and toes touching the floor enabling him to control the amount of weight to be supported by his arms.

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Moorestown, NJ, United States of America

Robert Holland