University of California

Samsung Electronics Co., Ltd.

Other

University of Southern California

Payam Heydari

Fred Tzeng

Chanwook Baik

Ahmad Yazdi

Amin Jahanian

Peyman Nazari

Aminghasem Safarian

Omeed Momeni

Lei Zhou

Ravindran Mahanavelu

Hamidreza Afzal

Rouzbeh Kananizadeh

Razieh Abedi

Huan Wang

Seyed Mohammad Hossein Mohammadnezhad

Michael M Green

David Howard

Zoran Nenadic

Alireza Karimi Bidhendi

Hamidreza Aghasi

Hossein Mohammadnezhad

An Do

Edward Preisler

Charles Liu

The disclosed FMCW radar system is configured to achieve a wide synthetic bandwidth of operation and a high range resolution. The disclosed FMCW radar system includes a receiver that combines the intermediate frequency (IF) components of multiple narrowband receivers to achieve the millimeter-scale range resolution. The disclosed FMCW radar system can be easily scaled, which enables it to be deployed in large arrays of antennas in order to attain high angular resolution. Additionally, the operation frequency of the disclosed FMCW radar system enables millimeter level cross-range resolution. In this manner, accurate estimation of the location and/or velocity of the objects within the local-sensing range (and potentially beyond) can be achieved.

Integrated wideband stepped-chirp radar sensor

Aspects of quadrature phase shift keying for quadrature amplitude modulation are described. In some examples, quadrature phase shift keying signals are generated using quadrature phase shift keying modulators. The quadrature phase shift keying signals are combined in a combiner circuit to generate a quadrature amplitude modulation signal for wireless transmission.

Quadrature phase shift keying quadrature amplitude modulation transmitter

An electromagnetic wave radiator may include: a first metal layer; a plurality of metal side walls vertically protruding along an edge of the first metal layer; and a second metal layer suspended over the first metal layer. The second metal layer includes a plurality of ports radially extending from edges of the second metal layer and a plurality of slots penetrating the second metal layer in a radial direction.

Electromagnetic wave radiator

Techniques, systems and architectures for generating desired phase shifts in a phased array to control the directions of radiation in a wide range of angles are disclosed. Particularly, phased array architectures based on novel PLL-coupled phase shifting techniques for implementation in millimeter-wave (mm-wave) and sub-terahertz (sub-THz) operations range are described. In one aspect, a phased array including an array of unit cells is disclosed. In some embodiments, each unit cell in the array of unit cells includes a dual-nested PLL that is configured to effectuate phase locking and frequency locking to a reference signal from an adjacent unit cell. Moreover, each PLL includes control circuitry that can generate a wide range of phase shifts between adjacent unit cells to facilitate phased-array operations. Note that using the dual-nested PLL to generate a desired phase shift between adjacent radiating elements eliminates the use of conventional lossy phase shifters in the phased array.

Millimeter-wave scalable PLL-coupled array for phased-array applications

Methods, systems, and apparatuses provide a transmitter architecture that directly generates 4-QAM constellation using a raw bit stream as input and that does not require a digital-to-analog converter (DAC) in the signal path.

Transmitter architecture for generating 4-QAM constellation with no digital-to-analog converters (DAC) in signal path requirement

A fully-implantable brain-computer interface cyber-physical system capable of acquiring and analyzing electrocorticogram ('ECoG') signals, recorded directly from the subdural space of the brain, to enable direct brain control of a prosthetic (e.g., a robotic gait exoskeleton or a functional electrical stimulation ('FES') system) is disclosed. The present system comprises a plurality of electrodes, for acquiring the ECoG signals, and a digital signal processor (&#x201c;DSP&#x201d;) for deriving a plurality of real-time commands from the ECoG signals. These real-time commands may then be wirelessly transmitted to the prosthetic for execution. Further, to avoid wireless data transmission of the ECoG signals from the plurality of electrodes to the DSP, which would expose the brain, skull, and scalp tissue to potentially harmful radio frequencies, a subcutaneous tunneling cable operatively couples the plurality of electrodes and the DSP.

Implantable electrocorticogram brain-computer interface system for restoring extremity movement

A data transmission link includes a transmitter superpositioning a data signal and a clock signal to generate a first signal. The transmitter transmits the first signal, through a link, wherein, the clock signal has a frequency equal to or higher than a Nyquist frequency of the data signal.

High-speed data recovery with minimal clock generation and recovery

A circuit includes a transmitter, a transmission line, and a receiver coupled to the transmitter through the transmission line, the transmission line used to transmit data at high-speed rates. At least one of the transmitter or receiver has associated therewith an unmatched termination, wherein either the transmitter or the receiver includes a finite impulse response (FIR) filter configured to cancel a reflected signal at a cancellation point situated at an input of the receiver, at an input of a driver, or at an output of the driver, the driver being coupled to an output of the transmitter, such that the reflected signal is substantially removed from the signal detected by the receiver.

Low-power high-speed signaling scheme over transmission line with unmatched terminations

Design of ultra broadband transimpedance amplifiers (TIA) for optical fiber communications is disclosed. In one embodiment, a TIA comprises a g-boosted dual-feedback common-base stage, a level shifter and an RC-degenerated common-emitter stage, and a first emitter-follower stage, wherein the first emitter follower stage is inductively degenerated. An output of the TIA is buffered using a second emitter-follower stage.

Ultra-broadband transimpedance amplifiers (tia) for optical fiber communications

A code-division multiplexing (CDM) system utilized in multi-channel (MC) front-end integrated circuits to significantly reduce the power consumption of such systems. The CDM system extends data compression advantages to uncorrelated and weakly correlated MC signals through the introduction of a new Multi-Channel Signal Binning and Multiplexing (MCSBM) method and architecture. The method achieves significant reductions in power consumption in comparison to a conventional time-division multiplexing quantizer, while adding only a modest amount of overhead and complexity. Systems and methods permit architects to fabricate MC integrated circuits with ultra low power consumption and small chip area. Another embodiment relates to the system's compressor organizing samples of the input signal in such a way that the downstream analog-to-digital converter quantizes the higher variance samples with a higher resolution compared to the resolution it uses to quantize other samples with lower variance.

Multi-channel code-division multiplexing in front-end integrated circuits

A CMOS distributed amplifier with distributed active input balun is disclosed. Each gcell within the distributed amplifier employs dual-output two-stage topology that improves gain and linearity without adversely affecting bandwidth and power.

CMOS linear differential distributed amplifier and distributed active balun

A method of adaptively and losslessly quantizing an analog signal to a digital signal in an analog-to-digital converter (ADC), is disclosed. According to one embodiment, the quantizing is based on one or more of an instantaneous amplitude of the analog signal, frequencies of the analog signal, and patterned contents of the analog signal, and the method comprises sampling the analog signal; quanitizing the analog signal by a quantizer core, wherein the quantizer core comprises a digital-to-analog converter (DAC), a comparator, and a voltage reference, wherein the quantization is one of efficient lossless and adaptive compression quantization, or a traditional quantization method; determining by an analog compression engine (ACE) whether the sampled analog signal is above or below a defined threshold, wherein the defined threshold includes one or more of an amplitude threshold, a frequency threshold, and a patterned adaptive threshold; adaptively manipulating the sampled signal mathematically through at least one of the DAC or voltage reference of the quantizer core; and outputting the digital signal.

Growing community of inventors

Irvine, CA, United States of America

Payam Heydari