Texas Instruments Corporation

Other

Qualcomm Incorporated

Steradian Semiconductors Private Limited

Apu Sivadas

Gireesh Rajendran

Subhashish Mukherjee

Alok Prakash Joshi

Krishnaswamy Thiagarajan

Yogesh Darwhekar

Sai Gunaranjan Pelluri

Brian Paul Ginsburg

Gangadhar Burra

Rakesh Kumar

Ankit Sharma

Assaf Sella

Ashish Lachhwani

Rittu Kulwant Sachdev

Sachin Bharadwaj, Jr

Vivek Dham

David Cohen

Sumeer Bhatara

According to an aspect, a radar system comprising a transmitter operative to transmit a first set of chirps on a single transmit antenna and a second set of chirps on a plurality of transmit antennas, in that, the first set of chirps forming a first part of a chirp frame and the second set of chirps forming a second part of the chirp frame, a first receiver segment operative to generate a first set of parameters from a first set of received chirps that is reflection of the first set of chirps from one or more objects and a second segment operative to generate a second set of parameters from a second set of received chirps that is reflection of the second set of chirps from the one or more objects part of the received chirp frame and the first set of parameters, wherein, first set of parameters and second set of parameters comprise at least one of range doppler and angle of one or more objects.

System, device and method for efficient MIMO radar

According to an aspect, method of enhancing a resolution in a radar system having an antenna aperture comprises measuring a first radiation pattern corresponding to a first set of receiving antennas by feeding a known radio frequency (RF) signal over the first set of receiving antennas, wherein the first set of radiation due to an impairment, coherently combining an interpolated radiation pattern with a received radar signal received by the set of receiving antenna when employed for an object detection, to generate a high signal to noise ratio (SNR) received signal, and iteratively combining the high SNR received signal with the interpolated signal to reduce the error due to the impairment.

System and method for generating point cloud data in a radar based object detection

A method in a time switched multiple input and multiple output (MIMO) radar system comprising, receiving () from an antenna array a plurality of data points representing a radar signal reflected from plurality of objects, forming () a first set of beams from the plurality of data points, wherein the first set of beams are making a first set angles with a normal to the antenna array, detecting a set of objects (A-L) from the first set of beams, determining () a set of Doppler frequencies of the set of objects, computing () a self-velocity representing a velocity of the antenna array from the set of Doppler frequencies and the first set of angles, and correcting () the plurality of data points using the self-velocity and a second set of angles to generate plurality of corrected data points.

Method, apparatus and device for doppler compensation in a time switched MIMO radar system

A multichannel radar system comprising a set of antennas each receiving a sequence of chirps reflected from plurality of objects, a range detector generating a set of range bins for each chirp, a beam former operative to generate a set of dominant frequency components from a group of range bins picked from the set of range bins across the set of antennas, a nearness detector for separating the set of dominant frequencies into a first set of dominant frequencies and a second set of dominant frequencies, a frequency subtractor configured to shift the each dominant frequency in the first set of dominant frequencies by its phase by a first value to form a third set of phase shifted dominant frequencies, and a Doppler estimator estimating a Doppler frequency of the each dominant frequency in the set of dominant frequencies from the third set of phase shifted dominant frequencies and the second set of dominant frequencies.

Method, apparatus and device for determining a velocity of an object in a time switched MIMO radar system

An object detection system comprises a first object detection unit detecting an object from a first radio frequency (RF) signal data comprising first set of characteristics representing a first object, a second object detection unit detecting the object from an optical image data and a calibration unit calibrating the first RF signal data from the optical image data, in that, the second object detection unit and the first object detection unit are aligned to detect the object in a first region.

Method and device for calibrating a radar object detection system

According to an aspect of the present invention, an electronic system () operative on a millimeter signal comprises an integrated circuit () comprising a first solder ball (A) and a second solder ball (B) respectively coupled to a positive and a negative signal interface points (and) of a differential millimeter signal on a die () housed in the integrated circuit (), wherein the first and the second solder balls (A andB) are positioned one behind other from an edge of the integrated circuit () and a three-path coplanar waveguide (CPW) comprising a center path (B) and a two adjacent paths (A andC) formed on a printed circuit board (PCB) () such that the center path (B) is coupled to the first solder ball that is in front and the two adjacent paths coupled to the second solder ball that is behind the first solder ball.

Millimeter wave integrated circuit and system with a low loss package transition

In an embodiment of the present disclosure, a Radar transceiver for object detection comprises a two dimensional antenna array receiving plurality of a reflected radio frequency (RF) signals, a mux-adder selectively adding the reflected RF signals in first mode and selectively multiplexing the reflected RF signals in a second mode, a range bin detector determining a valid range bins in the first mode and a three dimensional (3D) image reconstructor operating on the valid range bins to reconstruct a 3D image of the object in the second mode. In that the two dimensional antenna array comprises antenna elements arranged in K rows and M columns, and the mux-adder adds a RF signal received on the M columns of each row in the first mode. The mux-adder multiplexes the RF signal received on the M columns of each row in the second mode.

Method, system and device for radar based high resolution object detection

A notch filter including an inductor-capacitor tuning circuit is disclosed. The inductor-capacitor tuning circuit may determine a frequency response of the notch filter in accordance with an associated resonant frequency. In some exemplary embodiments, the inductor-capacitor circuit may include a differential inductor divided at a symmetry point and a variable capacitor coupled to the differential inductor at the symmetry point.

Notch filter with differential split inductor

According to an aspect of present disclosure, a set of power amplifiers are used to amplify power of a signal for transmission. The signal powers from a set of power amplifiers are coupled to set of primary windings which are commonly coupled to a secondary winding such that the powers on the primary windings are additive in the secondary winding. A current path on the primary side is provided for flow of a current that is induced on at least one primary winding when a power amplifier coupled to that primary winding is in 'off' state. As a result, the induced current is prevented from flowing in to the power amplifier that are in 'on' state. Further, the current path isolates the power amplifiers from each other thereby enabling the power amplifiers to operate at the rated efficiency. In one embodiment, the current path is provided using a resistor network.

System, method and device for power amplification of a signal in an integrated circuit

A device includes multiple transceivers, a coupling block and an antenna. The transceivers operate according to time-division multiple access (TDMA) techniques. The coupling block is designed to enable the multiple transceivers to transmit or receive corresponding signals using the antenna. The multiple transceivers include a first transmitter and a second transmitter. The first transmitter is connected to the antenna via a first coupling network. The second transmitter is connected to the antenna via a series connection of a second coupling network and at least a portion of the first coupling network. Other transmitters are connected to the antenna via a series arrangement of at least a portion of the first coupling network and corresponding coupling networks.

First coupling transformer secondary winding coupling second transmitter to antenna

A circuit includes an antenna, and a pair of transceivers. A first transceiver in the pair is connected to the antenna via a first pair of feed-points, and is designed to transmit and receive signals in a first band of frequencies. A second transceiver in the pair is connected to the antenna via a second pair of feed-points, and is designed to transmit and receive signals in a second band of frequencies. The first band and the second band are non-overlapping frequency bands. The first pair of feed-points is located at a voltage null point of the antenna with respect to the second pair of feed-points. The second pair of feed-points is located at a voltage null point of the antenna with respect to the first pair of feed-points. The first transceiver and the second transceiver are, thus, enabled to simultaneously transmit and/or receive corresponding signals using the same antenna.

Using a same antenna for simultaneous transmission and/or reception by multiple transceivers

A single-antenna solution is provided for near-field and far-field communication in wireless devices. In an embodiment, a first transceiver block generates a first transmit signal to be transmitted using radiative techniques. A second transceiver block generates a second transmit signal to be transmitted using inductive coupling. The first and second transceiver blocks are coupled to a same antenna for transmitting the first transmit signal using radiative coupling, and the second transmit signal using inductive coupling. The first transceiver block and the second transceiver block operate according to time division multiplexing, and in an embodiment corresponding to an FM transceiver and an NFC transceiver.

Antenna solution for near-field and far-field communication in wireless devices

An electronic circuit comprising a transistor-based RF (radio frequency) power amplifier () having balanced outputs (), a transistor-based receiver RF amplifier () having balanced inputs () ohmically connected to said balanced outputs () respectively of said RF power amplifier (), and a balun () having a primary () and a secondary (), said primary () having primary connections and a supply connection () of said primary () intermediate said primary connections and said primary connections ohmically connected both to said balanced outputs () of said RF power amplifier () respectively and to said balanced inputs () of said receiver RF amplifier, thereby to switchlessly couple RF between the balun () and the RF power amplifier () and switchlessly couple RF between the balun () and the receiver RF amplifier (). Other electronic circuits, processes, devices and systems are disclosed.

Circuits, processes, devices and systems for full integration of RF front end module including RF power amplifier

According to an aspect of the present invention, the magnitude and phase angle of looking-in impedance driven by an amplifier are computed in digital domain during normal operation within a module containing the amplifier. In an embodiment, the computed magnitude and phase angle are used for impedance matching at a node driven by the amplifier. As a result, impedance matching may be obtained even in situations when the impedance changes during operation.

Measuring load impedance of an amplifier driving a variable load

A method, system, and apparatus of a DC current based on chip RF power detection scheme for a power amplifier are disclosed. In one embodiment, a method includes generating a scaled current from an other current associated with power amplifier, transforming the scaled current (e.g., the scaled current may be scaled to the other current value) into a digital signal and using the digital signal to set a radio frequency power value of an antenna of the antenna module. The method may include transforming the scaled current into a voltage signal. The method may also include transforming the voltage signal into the digital signal. The method may also include generating a current mirror from a low dropout regulator.

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Bengaluru, India

Apu Sivadas