Freescale Semiconductor,inc.

Other

Applied Signals Intelligence, Inc.

Xtremespectrum, Inc.

Timothy R Miller

John W McCorkle

Matthew L Welborn

Martin Rofheart

William Shvodian

Adrian R Macias

Paul Robert Runkle

Deepak Joseph

Joel Zvi Apisdorf

Terence L Johnson

Bobby L Barnes

Richard D Roberts

Thomas E Miller

Kimberly Ann Miller

Nitin Sharma

Kaushal K Dhar

Richard Shaner

Douglas E Price

Martin Rofhear

Gerard P Lynch

A multi-port antenna and associated systems having extremely wide bandwidth and capable of maintaining directivity as frequency decreases and is made arbitrarily low, allowing DF systems to operate to arbitrarily low frequency regardless of size. Construction may be rugged, lightweight, and low cost, allowing reliable service in harsh environments. The systems allow utilization of both the E and H fields occupying a common area of space. The disclosed DF system takes advantage of knowledge of the as-installed array manifold, uses pattern matching to determine the angle of arrival (AoA) of incoming waves, and enhances sensitivity by using integration on cross-correlation products between the multiple ports to achieve SNR improvement.

Multiport DF antennas and DF systems

A multiport antenna in which the antenna conductive elements are arranged to form an at least partially enclosed volume which can accommodate an enclosure containing one or more electronic components, or optical components, or optoelectronic components, or a combination of these. The enclosure may also be provided with a conductive transparent window which permits optical components to receive and/or send optical information.

RF emitter characterization systems

A retrieval device may include a first plate and a second plate which may be movably coupled to a body via a first body fastener and a second body fastener, respectively. An upper plate connector and a lower plate connector may each be movably coupled to the first plate and a second plate with the lower plate connector positioned between the upper plate connector and the body fasteners. An optional tensioner may tension portions of the first plate and a second plate together. Upper gripper(s) may be coupled to the upper plate connector and lower gripper(s) may be coupled to the lower plate connector. The device may be movable between an open position, in which the upper gripper(s) and lower gripper(s) are positioned relatively distally from each other, and a closed position, in which the upper gripper(s) and lower gripper(s) are positioned relatively proximate to each other.

Retrieval device

An electromagnetic transmission system is provided, comprising: M chirp generators, each operating at a first frequency, each of the M chirp generators being configured to generate an idigital chirp portion comprising (1/M)of a digital chirp signal having a set ramp rate; a parallel-in serial-out register configured to receive the M digital chip portions in parallel at the first frequency, and configured to output the M digital chip portions in series as the digital chirp signal at a second frequency; and a digital-to-analog converter operating at the second frequency and configured to convert the digital chirp signal into an analog chirp signal, wherein i is an index that goes from 1 to M, and wherein the second frequency is M times the first frequency.

System and method for chirp-based transmission

A heated portable collapsible chair includes a collapsible frame. The collapsible frame supports a fabric human contact sheet having a chair seat portion and a chair back portion. A flexible heating element is located adjacent to a back surface of the human contact sheet so that heat generated by the heating element passes through the human contact sheet to warm a user. A battery is provided for selectively heating the heating element. The flexible heating element is preferably affixed to a backing sheet wherein the backing sheet is affixed to the back surface of the human contact sheet. The flexible heating element accommodates the flexing of the human contact sheet when the human contact sheet is distorted when collapsing the chair for storage or transport.

Portable collapsible camp chair with heated seat and back

The mobile repair and response unit is a truck with an attached trailer that includes a plurality of uniquely defined compartments and areas that are each provided to accomplish a particular task. The attached trailer contains a cabin within which a customer may stay while the customer's vehicle is being repaired. The attached trailer includes a tire balancing station adjacent to a tire changing station. An opposing side of the attached trailer includes a plurality of pump stations that dispense different types of fuels or lubricating oils that are customarily used to operate different types of vehicles. An air station is included on the attached trailer in order to provide pressurized air for use with pneumatically operated tools or to inflate tires of the vehicle being repaired. The rear of the attached trailer includes a ramp that folds down to enable entrance into the attached trailer.

Mobile repair and response unit

A receiver circuit () is provided, comprising: an agile clock () configured to generate an agile clock signal having a controllable agile clock phase based on agile clock control signals; a code processor () configured to receive an incoming signal and the agile clock signal, and to generate an on-time signal () and an error signal () corresponding to the incoming signal; a coarse acquisition circuit () configured to identify a coarse acquisition phase based on a total power of the on-time signal and plus a total power of the error signal; a fine acquisition circuit () configured to identify a fine acquisition phase based on the coarse acquisition phase and a magnitude of the on-time signal; and an acquisition controller () configured to control operation of the coarse acquisition circuit and the fine acquisition circuit, and to provide a final acquisition phase as a current phase based on the one or more fine acquisition phases.

System and method for determining signal phase

An equalizer is provided, including: a feedback combiner to combine an input signal and a feedback signal to produce a first signal; a delay line to delay the first signal to produce a second signal; a feed-forward combiner to combine the second signal and a feed-forward signal to produce an output signal; an interim decision circuit to extract a sign bit from the first signal; N feedback scaling elements to generate N scaled feedback signals; M feed-forward scaling elements to generate M scaled feed forward signals; a feedback circuit to pass the N scaled feedback signals through feedback delay elements and feedback summing elements to generate the feedback signal in response to the sign bit; and a feed forward circuit to pass the M scaled feed forward signals through feed-forward delay elements and feed-forward summing elements to generate the feed-forward signal in response to the sign bit.

System and method for equalizing an incoming signal

A method is provided for transmitting data. A first device generates a first signal having a first duty cycle, comprising a first gated-on portion and a first gated-off portion in a time slot; and a second device generates a second signal having second duty cycle, comprising a second gated-on portion and a second gated-off portion in the same time slot. The first gated-on portion is generated during a first segment of the time slot and the first gated-off portion is generated during a second segment of the time slot, while the second gated-on portion is generated during the second segment and the second gated-off portion is generated during the first segment. Media access control (MAC) can be used to further define positions within time slots and provide error correction, power control, and the like. A preamble can be transmitted at an increased power level to facilitate acquisition.

Method for sharing bandwidth using reduced duty cycle signals and media access control

A method is provided for offsetting a reference frequency of a quadrature reference clock signal. A quadrature reference clock () generates the quadrature reference clock signal at the reference frequency, while a quadrature variable offset clock () generates a quadrature clock signal at a base offset frequency based on a base offset value it receives from a control circuit (). The base offset value can be determined in many ways, including reading it from a local memory () or receiving it from a remote device (). A polyphase mixer () performs a polyphase mixing operation between the quadrature reference clock signal and the offset clock signal to generate an agile clock signal having an agile clock frequency equal to the reference frequency plus the base offset frequency. If desired, the method can revise the offset frequency based on actual conditions and determine a corresponding revised offset value ().

System and method for using programmable frequency offsets in a data network

A method is provided for receiving a data frame in an ultrawide bandwidth network. In this method, a device receives an ultrawide bandwidth signal containing a data frame. The device then performs an acquisition operation during a first preamble in the data frame, and identifies a marker after the first preamble that indicates that the first preamble has ended. After this, the device performs a signal processing operation during a second preamble in the data frame. After the training, the device then receives a header in the data frame, and then receives a payload in the data frame. By having a marker between the two preambles, this method provides a receiving device with critical information regarding the timing of the preamble section of a frame.

System and method for passing data frames in a wireless network

A system () and method () are presented for calibrating an analog signal path () associated with an Ultra Wideband (UWB) receiver (). The analog signal path includes a plurality of analog gain stages (-), a local oscillator mixer stage (), a compensation stage (), and a converter stage (). An information signal includes whitened symbols (). When a predetermined number of whitened symbols are accumulated for one of a plurality of gain configurations, an arithmetic mean is calculated and used an offset value. The offset value is retrieved whenever the gain configuration is activated and applied at the compensation stage to reduce the offset.

System and method for calibrating an analog signal path during operation in an ultra wideband receiver

A method is provided for estimating a frequency offset value. This method includes: receiving a signal from the transmitting device at the receiving device, the received signal having a transmitter frequency (); generating a local signal at the receiving device, the local signal having a starting frequency (); comparing a received signal phase and a local signal phase to determine an adjusted error signal representing a phase difference between the received signal and the local signal (); adjusting a current frequency of the local signal from the starting frequency to the transmitting frequency over a time period (); integrating the adjusted error signal over the time period to generate an integrated error signal (); and filtering the integrated error signal to generate a frequency difference estimate indicative of the frequency difference between the transmitter frequency and the starting frequency ().

Method and system for estimating frequency offsets

A device for detecting data synchronization in data communications includes pseudorandom noise (PN) lock circuits (). The PN lock circuits () receive an input data stream (). Each of the PN lock circuits () is time offset with respect to the other PN lock circuits. Each of the PN lock circuits () outputs a PN sequence responsive to the input data stream. For each PN lock circuit, there is provided a component () for comparing the PN sequence from the respective PN lock circuit to the input data stream, to determine whether the input data stream and the PN sequence are synchronized. An indication () that the data is synchronized is provided when the input data stream and the PN sequence are synchronized.

Growing community of inventors

Arlington, VA, United States of America

Timothy R Miller