Analog Devices,inc.

Analog Devices International Unlimited Company

Analog Devices Global

Analog Devices Technology

Analog Devices Global Unlimited Company

Haim Primo

Yosef Stein

Joshua A Kablotsky

Wei An

Roman Trogan

Yaniv Sapir

Seth S Kessler

Hazarathaiah Malepati

Fabian Lis

Yosi Stein

Aspects of the present disclosure include a crack detection system having a crack detection sensor including a plurality of sectors disposed concentrically around a hole within the crack detection sensor, a plurality of contacts configured to electrically connect to one or more sectors of the plurality of sectors, and a crack detection circuit configured to measure resistances of the one or more sectors of the plurality of sectors via two or more of the plurality of contacts to detect a crack in the one or more sectors of the plurality of sectors.

Apparatuses and methods for detecting cracks

Aspects of the present application allow for measurement of a calibrated resistance for a resistive film in a sensing element, such that effects from contact resistance and background resistance drifts due to factors such as temperature, strain or aging can be reduced or eliminated. In some embodiments, by taking a plurality of two-terminal resistance measurements between various pairs of electrodes on a resistive film, a contact-resistance-independent resistance of a reference portion of the resistive film can be determined. Further, a contact-resistance-independent resistance of a sensing portion of the resistive film can be determined based on a plurality of two-terminal resistance measurements between pairs of electrodes. The resistance of the reference portion can be removed from the measured resistance of the sensing portion, such that variations in the reference portion resistance that are not caused by a sensed environmental condition may be compensated.

Self-calibrating polymer nano composite (PNC) sensing element

A wireless charging platform for a wireless sensor network is disclosed, which includes a radio frequency energy distributor and data aggregator (REDDA) system configured to aggregate data from sensor nodes and wirelessly transmit power to the sensor nodes using a beamformed RF signal. The REDDA system can set a radiation pattern for the beamformed RF signal that maximizes RF energy transfer to the sensor nodes based on an environment associated with the sensor nodes. In various embodiments, the REDDA system can include an Internet of Things (IoT) interface connected to an IoT network, and the REDDA system can use information gleaned from the IoT network to set the radiation pattern.

Wireless charging platform using beamforming for wireless sensor network

A wireless charging network system is disclosed that includes wirelessly charged sensor nodes. The wireless network system can include a gateway node configured to aggregate data from sensor nodes within a coverage area of the gateway node. The gateway node is further configured to wirelessly transmit power to the sensor nodes using a beamformed signal, wherein the gateway node adjusts the beamformed signal to maximize wireless power transfer to sensor nodes within each sector of the coverage area. Location information can be used to adjust the beamformed signal. For example, in various embodiments, the gateway node includes a beamformer sector profile table that defines channel adaptive beam profiles for the beamformed signal for each sector of the coverage area. The gateway node can use location information to define the beam profiles.

Wireless charging platform using environment based beamforming for wireless sensor network

A transmission system may include a transformer, an adder, an encoder, and a transmitter. The transformer may segment and transform a data packet into segments. The adder may add a check code to each of the segments. The encoder may encode error correction to each of the segments with the added check code. A receiving system may include a receiver, a decoder, a checker, and a selector decoder. The decoder may decode error correction in each of the encoded segments. The checker may check the check code of the error corrected segments. The selector decoder may select at least one of the valid segments based upon the check code and transform the selected segments into a data packet.

Multi-layer error correcting coding

An electrical circuit includes a local oscillator configured to generate a first reference signal and a second reference signal having a predetermined phase shift with the first reference signal, an I-channel mixer configured to inject the first reference signal to an incoming signal and generate a first output, a compensation mixer configured to multiply the first output with a constant factor to generate a second output, a first low pass filter configured to approximately attenuate frequencies in the second output to generate a third output, and a first correcting filter configured to filter the third output to generate a fourth output. The first correcting filter is configured to reduce a channel impulse response mismatch between the first low pass filter and a second low pass filter, which is configured to attenuate frequencies in a Q-channel of the incoming signal. In specific embodiments, the phase shift includes 45&#xb0;.

Circuit architecture for I/Q mismatch mitigation in direct conversion receivers

Channel estimation for high mobility OFDM channels is achieved by identifying a set of channel path delays from an OFDM symbol stream including carrier data, inter-channel interference noise and channel noise; determining the average channel impulse response for the identified set of channel path delays in each symbol; generating a path delay curvature for each channel path delay in each symbol based on stored average channel impulse responses for the identified channel path delays; estimating the carrier data in the symbols in the OFDM symbol stream in the presence of inter-channel interference noise and channel noise from the OFDM symbol steam and the average impulse responses for the identified channel path delays; reconstructing the inter-channel interference noise in response to the path delay curvature, the identified set of channel path delays and estimated carrier data to produce a symbol stream of carrier data and channel noise with suppressed inter-channel interference noise.

OFDM channel estimation system and method components

The problem of inefficient channel impulse-response processing is addressed by processing different parts of a channel impulse response to accurately locate channel taps, and to generate more than one set of equalization coefficients. This allows the most-suited equalization coefficient to be selected based on a selection criterion.

Equalization for OFDM communication

A channel adaptive iterative turbo decoder for computing with MAP decoders a set of branch metrics for a window of received data, computing the forward and reverse recursive path state metrics and computing from the forward and reverse recursive path state metrics the log likelihood ratio for 1 and 0 and interleaving the decision bits; and identifying those MAP decoder decision bits which are non-convergent, computing a set of branch metrics for the received data, computing from the forward and reverse recursive path state metrics the log likelihood ratio (LLR) for 1 and 0 for each non-converged decision bit and interleaving the non-convergent decision bits.

Channel adaptive iterative turbo decoder system and method

Channel estimation for high mobility OFDM channels is achieved by identifying a set of channel path delays from an OFDM symbol stream including carrier data, inter-channel interference noise and channel noise; determining the average channel impulse response for the identified set of channel path delays in each symbol; storing the average channel impulse responses for the identified channel path delays; generating a path delay curvature for each channel path delay in each symbol based on stored average channel impulse responses for the identified channel path delays; estimating the carrier data in the symbols in the OFDM symbol stream in the presence of inter-channel interference noise and channel noise from the OFDM symbol stream and the average impulse responses for the identified channel path delays; reconstructing the inter-channel interference noise in response to the path delay curvature, the identified set of channel path delays and estimated carrier data; and subtracting the reconstructed inter-channel interference noise from the OFDM symbol stream to produce a symbol stream of carrier data and channel noise with suppressed inter-channel interference noise.

Channel estimation system and method

A Galois field linear transformer trellis system includes a Galois field linear transformer matrix; an input selection circuit for providing to the matrix a number of input bits in one or more trellis bit streams and a trellis state output of the matrix and a programmable storage device for configuring the matrix to perform a multi-cycle Galois field transform of the one or more trellis bit steams and trellis state output to provide a plurality of trellis output channel symbols and a new trellis state output in a single cycle.

Galois field linear transformer trellis system

A programmable data encryption engine for performing the cipher function of an advanced encryption standard (AES) algorithm includes a parallel look-up table system responsive in a first mode to a first data block for implementing an AES selection function and executing the multiplicative inverse in GF(2) and applying an affine over GF(2) transformation to obtain a subbyte transformation and in a second mode to the subbyte transformation to transform the subbyte transformation to obtain a shift row transformation, and a Galois field multiplier for transforming the shift row transformation to obtain a mix column transformation and add a round key resulting in an advanced encryption standard cipher function of the first data block.

Programmable data encryption engine for advanced encryption standard algorithm

A programmable data encryption engine for performing the cipher function of the data encryption standard (DES) algorithm includes a Galois field linear transformer system (GFLT) responsive to a first input data block to execute an E permutation to obtain an expanded data block and combine it with a key to obtain a second larger intermediate data block in one cycle; and further includes a parallel look-up table system for implementing the unique data encryption standard selection function(s) and for condensing the second larger intermediate data block to a third data block similar to the first input data block in a second cycle and submitting it to the Galois field linear transformer system to execute a second permutation in a third cycle resulting in a data encryption standard cipher function of the first input data block.

Programmable data encryption engine

A reconfigurable input Galois field linear transformer system includes a Galois field linear transformer including a matrix of cells; a plurality of storage planes for storing control patterns representing a number of different functions; a storage plane selector circuit for selecting a storage plane representing a function for enabling the cells of the matrix which defines that function; and a reconfigurable input circuit for delivering input data to the enabled cells to apply that function to the input data.

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Tikwa, Israel

Haim Primo