Texas Instruments Corporation

Pixie Technology Inc.

Attenti Electronic Monitoring Ltd

Ofer Friedman

Robert Bogdan Staszewski

Nir Tal

Amir Bassan-Eskenazi

Oren E Eliezer

Naftaly Sharir

Giora Sussman

Avi Baum

Yoav Tikochinsky

Gregory Lerner

Sameh Sameer Rezeq

Ran Litvak

Itay Sherman

Yossi Tsfaty

Eran Aharonson

Noam Lavi

Tsach Shwartz

David Damshek

Gili Elias

Eyal Carmi

Yair Laster

A monitoring device, including an encasement having an upper part and a lower part; wherein the lower part is attached by a hinge at a first side of the encasement to the upper part; wherein at an opposite side the upper part can be lowered onto the lower part to close the encasement or lifted up to open the encasement; an elongated strap with a first end and a second end wherein the first end of the strap is attached to the first side of the encasement and configured to enable coupling the monitoring device to a person by wrapping the strap around a limb of a person, and inserting the second end of the strap into the opposite side of the encasement onto the lower part and covering it with the upper part.

Adjustable electronic monitoring device

A tracking device, including a communication interface encased in a encasement with a receptacle on two opposite sides of the encasement, a strap, including one or more thin elongated flexible sheets, links coupled to one side of the one or more thin elongated flexible sheets, a fiber optic cable extending from a first end of the one or more thin elongated flexible sheets to a second end of the one or more thin elongated flexible sheets, a head connected to each end of the one or more thin elongated flexible sheets; wherein the heads are configured to fit into the receptacles and lock the strap in the receptacles thus preventing the strap from sliding out of the receptacles; and wherein the communication interface is configured to detect tampering with the strap by transmitting an optical signal through the fiber optic cable.

Protected security strap

A method for determining a location of a wireless tag, the method may include generating or receiving, by a tagged mobile device, an estimated location of another tag that communicates with the tagged mobile device; receiving or generating, by the tagged mobile device, multiple distance measurements that are obtained during different points of time; wherein the multiple distance measurements are obtained during a rotational movement of the tagged mobile device and represent distances between the tagged mobile device and the other tag; finding a certain angle of rotation of the mobile device that corresponds to a minimal distance measurement of the multiple distance measurements; and amending the estimated location of the other tag based upon the certain angle of rotation.

Rotation based alignment of a group of wireless tags

A method for managing a sphere of wireless tags, the method comprises programming, by a wireless reader, a group of wireless tags to belong to the sphere of wireless tags; sending by the wireless reader sphere beacons aimed to the wireless tags of the sphere; detecting a loss of a wireless tag of the sphere if the wireless tag did not respond to a predetermined number of sphere beacons; and responding to the detecting of the loss of the wireless tag.

Managing a sphere of wireless tags

A method for determining a location of a group of wireless tags, the method may include receiving first information indicative of distances between each wireless tag of the group and between at least three other wireless tags of the group; tracking a first movement of a certain tag of the group of wireless tag in relation to other wireless tags of the group to provide first movement information; receiving, after the performing of the first movement, second information indicative of distances between each wireless tag of the group and between at least three other wireless tags of the group; and determining locations of the wireless tags of the group in response to the first information, second information and the first movement information.

Location measurments using a mesh of wireless tags

Wireless locator tag

A novel and useful mechanism for reducing the required backoff and the peak to average power ratio (PAPR) needed for an OFDM transmitter whiles still meeting spectral mask and EVM specifications. The mechanism searches, for each packet to be transmitted, for several possible scrambler and encryption sequences that would yield the best spectral mask and EVM with lowest PAPR. The search can be performed using the existing transmitter and receiver PHY circuit chain to modulate and demodulate the candidate hypotheses. Once the scrambler sequence and/or encryption sequence is selected, the packet is transmitted using the selected scrambler and encryption sequences. In addition, the invention exploits the fact that even for very low backoff margins, a reduced number of candidate hypotheses may be tested while still yielding a high probability of meet the spectral mask and EVM specifications.

Apparatus for and method of minimizing backoff for orthogonal frequency division multiplexing transmission

A novel system and method for correcting the residual phase offset between a recovered pilot signal and the received stereo signal. The invention uses a Costas loop as an auxiliary loop in addition to the pilot recovery phase locked loop (PLL) to lock onto the stereo component itself. This auxiliary loop functions to generate a pilot to stereo component phase correction signal that is added to the stereo carrier phase The resultant phase is used to generate the recovered pilot carrier used to demodulate the stereo MPX signal. The Costas loop is activated together with the main pilot recovery PLL that locks onto the pilot tone in the demodulated MPX signal. The auxiliary Costas loop is operative to track and determine a residual phase error of up to several degrees.

FM stereo decoder incorporating Costas loop pilot to stereo component phase correction

A transmitter employing a sigma delta modulator having a noise transfer function adapted to shift quantization noise outside at least one frequency band of interest. A technique is presented to synthesize the controllers within a single-loop sigma delta modulator such that the noise transfer function can be chosen arbitrarily from a family of functions satisfying certain conditions. Using the novel modulator design technique, polar and Cartesian (i.e. quadrature) transmitter structures are supported. A transmitter employing polar transmit modulation is presented that shapes the spectral emissions of the digitally-controlled power amplifier such that they are significantly and sufficiently attenuated in one or more desired frequency bands. Similarly, a transmitter employing Cartesian transmit modulation is presented that shapes the spectral emissions of a hybrid power amplifier such that they are significantly and sufficiently attenuated in one or more desired frequency bands.

Transmitter for wireless applications incorporation spectral emission shaping sigma delta modulator

A novel and useful fast hopping frequency synthesizer and transmitter associated therewith. The frequency synthesizer and transmitter incorporates a digitally controlled oscillator (DCO) adapted to operate open loop. Instantaneous frequency switching is achieved by changing an oscillator tuning word (OTW) to imitate the three oscillators of a UWB transmitter. In one embodiment, the DCO can change the frequency instantaneously within the 1/fof the varactor devices used to construct the DCO. An all digital phase lock loop (ADPLL) is used for offline calibration prior to the start of packet transmission or reception. Any phase shift during the switching is tracked by a digital circuit in the transmitter. In a second embodiment, additional frequency accuracy is provided by use of a numerically controlled oscillator (NCO) that functions to generate a fine resolution complex exponential waveform which effectively shifts the synthesized frequency. A mixer applies the waveform to the I and Q data samples prior to conversion to the digital domain.

Fast hopping frequency synthesizer using an all digital phased locked loop (ADPLL)

An on-chip reduced complexity modulation noise estimation mechanism for performing nonlinear signal processing to analyze modulation noise to determine whether a semiconductor device under test complies with the performance criteria set by specifications or a standard corresponding thereto. When used in a two-point transmitter modulation architecture, the mechanism relies on the fact that the noise statistics at the output of the transmitter can be determined by observing the phase error output of the phase detector within the phase locked loop. In the digital embodiment of the mechanism, the phase error signal is compared to a configurable threshold value to generate an exception event. If the number of exception events exceeds a configurable max_fail value after comparisons of a configurable number of phase error samples, the test fails. A pass/fail signal is output reflecting the result of the test. The test comprises a configurable number of test samples to permit flexibility in the tradeoff between the time required to complete the test versus the statistical reliability of the test result, i.e. the probability of it correctly determining whether the tested device complies with target specifications.

Modulation noise estimation mechanism

A novel and useful fast hopping frequency synthesizer and transmitter associated therewith. The frequency synthesizer and transmitter incorporates a digitally controlled oscillator (DCO) adapted to operate open loop. Instantaneous frequency switching is achieved by changing an oscillator tuning word (OTW) to imitate the three oscillators of a UWB transmitter. In one embodiment, the DCO can change the frequency instantaneously within the 1/&#x192;of the varactor devices used to construct the DCO. An all digital phase lock loop (ADPLL) is used for offline calibration prior to the start of packet transmission or reception. Any phase shift during the switching is tracked by a digital circuit in the transmitter. In a second embodiment, additional frequency accuracy is provided by use of a numerically controlled oscillator (NCO) that functions to generate a fine resolution complex exponential waveform which effectively shifts the synthesized frequency. A mixer applies the waveform to the I and Q data samples prior to conversion to the digital domain.

Growing community of inventors

Ganei-Tikva, Israel

Ofer Friedman