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公开(公告)号：US20250168051A1
公开(公告)日：2025-05-22
申请号：US19026969
申请日：2025-01-17
Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventor： Huan Wang , Payam Heydari
IPC: H04L27/26
Abstract: Disclosed are example embodiments of a receiver. The receiver including a front-end amplification and filtering block configured to amplify a received signal and filter out a potential jammer signal from a communication channel. The receiver also including a quadrature mixer, coupled to the front-end amplification and filtering block, and configured to down-convert the amplified and filtered signal to baseband to generate a quadrature LO signal. Additionally, the receiver including a carrier synchronization loop configured to synchronize the quadrature LO signal and carrier phase of the received signal. The receiver also including a demodulator coupled to the quadrature mixer and the carrier synchronization loop.
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12.发明申请公开(公告)号：US20250105787A1
公开(公告)日：2025-03-27
申请号：US18918437
申请日：2024-10-17
Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventor： Huan Wang , Payam Heydari
IPC: H03D7/12
Abstract: Disclosed are example embodiments of harmonic mixer. The harmonic mixer including a multi-phase LO signal generator. Each phase of the multi-phase LO signal generator outputting an LO signal on a signal line. The harmonic mixer including a plurality of mixers. Each mixer of the plurality of mixers connected to a signal line. The mixer driven by an IF. The harmonic mixer including an output network coupled to the outputs of the plurality of mixers.
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公开(公告)号：US20230355156A1
公开(公告)日：2023-11-09
申请号：US18245120
申请日：2021-12-09
Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventor： Ahmadreza Danesh , Payam Heydari , Haoran Pu , Zoran Nenadic , An H. Do , Omid Malekzadeh Arasteh
Abstract: This invention discloses a non-invasive electroencephalography (BEG) signal recorder and a multiband active electrode (MAE) EEG cap array. A narrow-band amplification method is disclosed that divides the desired bandwidth of the input brain signal to smaller bands, each recorded using a separate amplification path. A novel twisted differential feedback topology is disclosed for both amplifiers and active filters having ultra-high input impedance. A one-wire EEG cap array of tightly connected MAEs is disclosed that improves the flexibility and portability of the EEG cap by reducing the number of wires between the EEG cap and the host processor. Due to having MAEs embedded inside electrodes, the output signals of electrodes are digital information. The tightly connected network of MAEs enables the reference electrode to be chosen dynamically. Moreover, the voltage of the reference node is adjusted using a correction feedback loop before each recording step.
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公开(公告)号：US11749890B2
公开(公告)日：2023-09-05
申请号：US18151697
申请日：2023-01-09
Applicant: The Regents of the University of California
Inventor： Hamidreza Afzal , Omeed Momeni , Rouzbeh Kananizadeh , Razieh Abedi , Payam Heydari
CPC classification number: H01Q3/36 , H03L7/0802
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20230163461A1
公开(公告)日：2023-05-25
申请号：US18151697
申请日：2023-01-09
Applicant: The Regents of the University of California
Inventor： Hamidreza Afzal , Omeed Momeni , Rouzbeh Kananizadeh , Razieh Abedi , Payam Heydari
CPC classification number: H01Q3/36 , H03L7/0802
Abstract: 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.
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公开(公告)号：US20220404483A1
公开(公告)日：2022-12-22
申请号：US17856005
申请日：2022-07-01
Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventor： Hamidreza Aghasi , Payam Heydari
IPC: G01S13/58
Abstract: 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.
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公开(公告)号：US11316275B2
公开(公告)日：2022-04-26
申请号：US16805091
申请日：2020-02-28
Inventor： Chanwook Baik , Payam Heydari , Peyman Nazari
Abstract: 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.
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18.发明授权公开(公告)号：US11278226B2
公开(公告)日：2022-03-22
申请号：US16376831
申请日：2019-04-05
Inventor： Payam Heydari , Zoran Nenadic , An Do , Charles Liu
Abstract: 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 (“DSP”) 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.
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19.发明授权公开(公告)号：US09001848B2
公开(公告)日：2015-04-07
申请号：US13686803
申请日：2012-11-27
Applicant: The Regents of the University of California
Inventor： Fred Tzeng , Payam Heydari
CPC classification number: H04J13/10 , H04B1/707 , H04B2201/70707
Abstract: 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.
Abstract translation: 在多通道（MC）前端集成电路中使用的码分多路复用（CDM）系统可显着降低这种系统的功耗。 CDM系统通过引入新的多信道信号分组和复用（MCSBM）方法和架构，将数据压缩优势扩展到不相关和弱相关的MC信号。 与传统的时分复用量化器相比，该方法实现了功耗的显着降低，同时仅增加了适量的开销和复杂度。 系统和方法允许建筑师制造具有超低功耗和小芯片面积的MC集成电路。 另一实施例涉及系统的压缩机组合输入信号的样本，使得下游模数转换器与其用于量化具有较低方差的其他样本的分辨率相比，以更高的分辨率量化较高方差样本。
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