Texas Instruments Corporation

Intel Corporation

Apple Inc.

Anand Ganesh Dabak

Eko Nugroho Onggosanusi

Timothy M Schmidl

Badri N Varadarajan

Il Han Kim

Srinath Hosur

Tarkesh Pande

Ramanuja Vedantham

Kumaran Vijayasankar

Aris Papasakellariou

Anuj Batra

Alan Gatherer

Xiaolin Lu

Jaiganesh Balakrishnan

Sundararajan Sriram

Srinath Mathur Ramaswamy

Gang Xu

David Patrick Magee

Yan Hui

Ranjit Gharpurey

Runhua Chen

Lei Ding

Gibong Jeong

Charles Kasimer Sestok, Iv

Baher S Haroun

Deric Wayne Waters

Tarik Muharemovic

Swaminathan Sankaran

William Robert Krenik

Clive D Bittlestone

Srinivas Lingam

Yaron Alpert

Manish Goel

Carl Michael Panasik

Pierre Bertrand

Brian Paul Ginsburg

Sandeep Rao

Abdellatif Bellaouar

Murtaza Ali

Michael Oliver Polley

Arthur John Redfern

Brent Alan McDonald

Jing Jiang

Jianwei Zhou

Oren E Eliezer

Gerd Schuppener

Siraj Akhtar

Minghua Fu

Hun-Seok Kim

Yinong Ding

Muhammad Zubair Ikram

Hirohisa Yamaguchi

Mohammed Nafie

Amardeep Sathyanarayana

Shu Du

Rohit Negi

Venkata Ramanan

Il-Han Kim

Chaitali Sengupta

Mehmet Ali Donmez

Ii Han Kim

Donald Phillip Shaver

Heng-Chih Lin

Kaichien Tsai

Matan Ben-Shachar

Charles Sestok

Paul H Fontaine

Anand Gopalan

Vaibhav Garg

Venkata Ramanan Ramamurthy

Sujeet Milind Patole

Antonio F Mondragon-Torres

Steven P Pekarich

Luis Fernando Reynoso

Venkataramanan Ramamurthy

Mahmoud Abdelmoneim Abdelmoneim Elgenedy

R Venkata Ramanan

Jing-Fei Ren

Zigang Yang

Susan Yim

Marius Moe

Edwin Randolph Cole

John Charles Linn

Alan Henry Leek

Domingo G Garcia

Nitish Krishna Murthy

Tolga Dinc

Michael L McMahan

Salvatore Luciano Finocchiaro

Ariel Zaltsman

Edward Mullins

Eric Baissus

Michel Frechette

Ravindra Karnad

Nathan R Belk

Shigenori Kinjo

Timothy M Schmidt

Nasir Ahmed

Vasanthan Raghavan

Luis Fernando Reynoso Covarrubias

A computer-readable storage device stores machine instructions which, when executed by one or more central processing unit (CPU) cores, causes the one or more CPU cores to use a first ultrasonic transducer and a second ultrasonic transducer to measure fluid flow using a current measurement frequency and to perform a temperature calibration process. The temperature calibration process includes the sequentially generation of a plurality of electrical signals for the first ultrasonic transducer, the generated electrical signals each having a different frequency. For each frequency, the temperature calibration process includes the measurement of an amplitude of a signal from the second ultrasonic transducer. Based on the measured amplitudes of the signals from the second ultrasonic transducer, the temperature calibration process includes the determination of a new measurement frequency. The first and second ultrasonic transducers are used to measure fluid flow using the new measurement frequency.

Dynamic temperature calibration of ultrasonic transducers

Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter includes a synchronization unit configured to provide a primary synchronization signal and a secondary synchronization signal having first and second segments. The transmitter also includes a secondary scrambling unit configured to provide a scrambled secondary synchronization signal, wherein scrambling agents for the first and second segments are derived from a primary synchronization sequence of the primary synchronization signal. The secondary scrambling unit is further configured to provide an additional scrambling of one of the first and second segments, wherein a second scrambling agent is derived from the remaining segment of a secondary synchronization sequence of the secondary synchronization signal. The transmitter further includes a transmit unit configured to transmit the primary synchronization signal and the scrambled secondary synchronization signal.

Mapping schemes for secondary synchronization signal scrambling

Ultrasonic ranging systems and methods that use coding to distinguish emitted bursts from multiple transducers temporally stagger the bursts emitted from the transducers. The stagger delay between bursts from different transducers in a sensing frame can be randomized between different sensing frames to prevent blind zones. The stagger delay can be relatively small (e.g., between 3 ms and 10 ms) as compared to delays required between bursts in a single-tone ranging system (which would need to be more on the order of between 30 ms and 40 ms, depending on the maximum detecting range of the ranging system). The coding of bursts can be selected to utilize the entire bandwidth of the bursting transducer so as to preserve short-range sensitivity over transducer ringing. Schemes in which some transducers in a system only listen for bursts from other transducers but do not themselves burst within a sensing frame are also described.

Coded ultrasonic sensing with staggered bursts

Using a phase interferometry method which utilizes both amplitude and phase allows the determination and estimation of multipath signals. To determine the location of an object, a signal that contains sufficient information to allow determination of both amplitude and phase, like a packet that includes a sinewave portion, is provided from a master device. A slave device measures the phase and amplitude of the received packet and returns this information to the master device. The slave device returns a packet to the master that contains a similar sinewave portion to allow the master device to determine the phase and amplitude of the received signals. Based on the two sets of amplitude and phase of the RF signals, the master device utilizes a fast Fourier transform or techniques like multiple signal classification to determine the indicated distance for each path and thus more accurately determines a location of the slave device.

Super resolution radio frequency location determination

An integrated circuit includes one or more central processing unit (CPU) cores configured to cause a first ultrasonic transducer to generate ultrasonic signals into a fluid moving in a pipe and the first or a second ultrasonic transducer to receive the ultrasonic signals from the fluid. The CPU core(s) also compute a first value indicative of at least one of a standard deviation and a time correlation based on the received ultrasonic signals. The CPU core(s) further determine a second value indicative of a volume of gas bubbles in the fluid using the computed first value indicative of the at least one of the standard deviation and time correlation.

Gas volume determination in fluid

Methods for building, transmitting, and receiving frame structures in power line communications (PLC) are described. Various techniques described herein provide a preamble design using one or more symbols. One or more preamble symbols may be interspersed within a header portion of a PLC frame to facilitate estimation of a frame boundary and/or sampling frequency offset, for example, in the presence of impulsive noise.

Building, transmitting, and receiving frame structures in power line communications

A flow meter ultrasonically measures fluid velocity in a pipe and ultrasonically transmits fluid flow data along the pipe. An ultrasonic transducer used for fluid velocity measurement may optionally also be used for communication of flow data, and optionally, the ultrasonic frequency for fluid velocity measurement may be the same as the ultrasonic frequency for communication of flow data.

Ultrasonic flow meter

In an example method of target position estimation, the method includes calculating initial estimated positions of a target transmitter. Each of the initial estimated positions is based on an angle of arrival estimate received from a locator. The method includes generating an error projection associated with each of the initial estimated positions. The error projection is based on azimuth and elevation error characteristics of the locator associated with the initial estimated position. The method includes creating a select group of the locators based on overlaps of the error projections, wherein the select group of locators comprises a subset of the locators. The method includes calculating a refined estimate of the position of the target transmitter based on the initial estimated positions associated with the select group of locators.

Adaptive anchor selection and target position estimation

A transducer system with a transducer and circuitry for applying a waveform to excite the transducer during an excitation period. The applying circuitry also comprises circuitry for changing a frequency of the waveform during the excitation period.

Ultrasonic transducer system and method using broadband system responses

A method for dithering radar frames includes determining at least one of a chirp period Tc for radar chirps in a radar frame and a chirp slope S for radar chirps in the radar frame. In response to determining the chirp period Tc, a maximum chirp dither Δc(max) is determined, and for the radar frame N, a random chirp dither Δc(N) between negative Δc(max) and positive Δc(max) is determined. In response to determining the chirp slope S, a maximum slope dither Ψ(max) is determined, and for the radar frame N, a random slope dither Ψ(N) between negative Ψ(max) and positive Ψ(max) is determined. A radar sensor circuit generates radar chirps in the radar frame N based on the at least one of (1) the chirp period Tc and the random chirp dither Δc(N) and (2) the chirp slope S and the random slope dither Ψ(N).

Frequency modulated continuous wave radar system with interference mitigation

One example includes a passive radar receiver system including an RF receiver front-end to receive a wireless source signal and a reflected signal. An antenna switch of the front-end switches a first antenna to a receiver chain during a first time to generate first radar signal data based on a combined wireless signal comprising wireless source signal and the reflected signal, and switches a second antenna to the receiver chain during a second time to generate second radar signal data based on the combined wireless signal. A signal processor generates source signal data associated with the wireless source signal based on the first and second radar signal data and generates reflected signal data associated with the reflected signal based on the first and second radar signal data, and generates target radar data associated with a target based on the source and reflected radar signal data.

Passive radar receiver system

A user client device with a single receive (RX) chain, a first antenna and a second antenna, and a processor that causes the user client device to couple the single RX chain to the first antenna to receive a first data packet on a first channel and determine a first channel state information (CSI) tile of the first channel based on one or more fields in the first data packet, decouple the first antenna from the single RX chain and couple the second antenna to the single RX chain to continue receiving the first data packet on a second channel, determine a second CSI tile of the second channel based on one or more of a portion of the first plurality of fields, aggregate the first CSI tile with the second CSI tile, and generate a CSI matrix based on aggregating the first CSI tile with the second CSI tile.

Simultaneous CSI at single RX chain device

In a disclosed embodiment, a power line communication (PLC) transmitter includes a forward error correction (FEC) encoder that receives payload data and adds parIty information to the data to create an encoded output, a fragmenter that receives the encoded output from the FEC encoder and segments the encoded output into a plurality of fragments, a fragment repetition encoder that receives the plurality of fragments from the fragmenter and copies each of the fragments a selected number of times, and an interleaver that receives the copies of the plurality of fragments from the fragment repetition encoder and interleaves the copies of the plurality of fragments for transmission on a power line.

Data encoder for power line communications

A method of calculating a time difference is disclosed. The method includes sampling a first ultrasonic signal (r) to produce a first sampled signal (y(i)) and sampling a second ultrasonic signal (r) to produce a second sampled signal (y(i)). A first time (LEAD_LAG) is determined between a time the first sampled signal crosses a threshold () and a time the second sampled signal crosses the threshold. The first sampled signal is cross correlated with the second sampled signal to produce a second time (SAMP_OFFSET). The time difference is calculated in response to the first and second times.

Extended range ADC flow meter

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Richardson, TX, United States of America

Anand Ganesh Dabak