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    LOW POWER MULTI-GIGABIT PER SECOND MILLIMETER-WAVE DATA-LINK EMPLOYING MODULATED REFLECTIONS
    2.
    发明申请
    LOW POWER MULTI-GIGABIT PER SECOND MILLIMETER-WAVE DATA-LINK EMPLOYING MODULATED REFLECTIONS 审中-公开
    低功耗多功能数码相机采用第二台数码相机采用调制反射

    公开(公告)号：US20150280321A1

    公开(公告)日：2015-10-01

    申请号：US14675319

    申请日：2015-03-31

    Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

    Inventor： Adrian J. Tang ,  Nacer E. Chahat ,  Goutam Chattopadhyay ,  Choonsup Lee

    IPC: H01Q3/46

    CPC classification number: H01Q3/46

    Abstract: A system for wirelessly communicating between a base station and a mobile device, including a reflector integrated with a mobile device, wherein the reflector reflects carrier radiation transmitted from a base station, to form a reflection of the carrier radiation, and input data from the mobile device modulates a reflection coefficient of the reflector, thereby modulating the reflection such that the reflection of the carrier radiation carries the input data to the base station.

    Abstract translation: 一种用于在基站和移动设备之间进行无线通信的系统，包括与移动设备集成的反射器，其中所述反射器反射从基站发送的载波辐射，以形成载波辐射的反射，并且从移动台输入数据 器件调制反射器的反射系数，从而调制反射，使得载波辐射的反射将输入数据传送到基站。

    Sub-thermal spread spectrum data-link
    3.
    发明授权
    Sub-thermal spread spectrum data-link 有权

    公开(公告)号：US11483027B2

    公开(公告)日：2022-10-25

    申请号：US17127017

    申请日：2020-12-18

    Applicant: California Institute of Technology

    Inventor： Adrian J. Tang ,  Mau-Chung Frank Chang ,  Rulin Huang

    IPC: H04B1/707 ,  H04B1/712 ,  H04B1/709 ,  H04B1/7087 ,  H04B1/7117

    Abstract: We have demonstrated that the bandwidth millimeter wavelengths offer can be leveraged to deeply spread a low-data rate signal below the thermal floor of the environment (sub-thermal) by lowered transmit power combined with free space losses, while still being successfully received through a novel dispreading structure which does not rely on pre-detection to extract timing information. The demonstrated data link ensures that it cannot be detected beyond a designed range from the transmitter, while still providing reliable communication. A demonstration chipset of this sub-thermal concept was implemented in a 28 nm CMOS technology and when combined with an InP receiver was shown to decode signals up to 30 dB below the thermal noise floor by spreading a 9600 bps signal over 1 GHz of RF bandwidth from 93 to 94 GHz using a 64 bit spreading code. The transmitter for this chipset consumed 62 mW while the receiver consumed 281 mw.

    SELF-CALIBRATING CORRELATING RECEIVERS
    7.
    发明申请
    SELF-CALIBRATING CORRELATING RECEIVERS 有权

    公开(公告)号：US20250112807A1

    公开(公告)日：2025-04-03

    申请号：US18904924

    申请日：2024-10-02

    Applicant: California Institute of Technology

    Inventor： Adrian J. Tang ,  Goutam Chattopadhyay ,  Omkar Pradhan ,  Subash Khanal

    IPC: H04L27/00 ,  H04B1/10

    Abstract: A circuit comprising a first Fourier Transform block operable to perform a Fourier Transform and having a first input configured for receiving an I signal and a second input configured for receiving a Q signal; a first plurality of n of outputs for I channels and Q channels each comprising a different frequency bin output from the Fourier Transform; I and Q summing blocks comprising a set of connector lines connecting an ith one of I channels with an ith one of the Q channels; an inverse Fourier Transform block connected to the summing blocks and operable to perform an inverse Fourier Transform; a correlator for correlating the outputs of the inverse Fourier Transform; a Fourier Transform block for Fourier Transforming the correlator output; a comparator for comparing the correlation term to zero; and an error correction circuit for tuning the magnitude and phase of the I and Q channels using the comparator output as feedback.

    SUB-THERMAL SPREAD SPECTRUM DATA-LINK
    8.
    发明申请
    SUB-THERMAL SPREAD SPECTRUM DATA-LINK 有权

    公开(公告)号：US20210194535A1

    公开(公告)日：2021-06-24

    申请号：US17127017

    申请日：2020-12-18

    Applicant: California Institute of Technology

    Inventor： Adrian J. Tang ,  Mau-Chung Frank Chang ,  Rulin Huang

    IPC: H04B1/712 ,  H04B1/7117 ,  H04B1/7087 ,  H04B1/709

    Abstract: We have demonstrated that the bandwidth millimeter wavelengths offer can be leveraged to deeply spread a low-data rate signal below the thermal floor of the environment (sub-thermal) by lowered transmit power combined with free space losses, while still being successfully received through a novel dispreading structure which does not rely on pre-detection to extract timing information. The demonstrated data link ensures that it cannot be detected beyond a designed range from the transmitter, while still providing reliable communication. A demonstration chipset of this sub-thermal concept was implemented in a 28 nm CMOS technology and when combined with an InP receiver was shown to decode signals up to 30 dB below the thermal noise floor by spreading a 9600 bps signal over 1 GHz of RF bandwidth from 93 to 94 GHz using a 64 bit spreading code. The transmitter for this chipset consumed 62 mW while the receiver consumed 281 mw.

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