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    Sharing AGC Loop Between Demodulator and Spectrum Analysis System
    3.
    发明申请
    Sharing AGC Loop Between Demodulator and Spectrum Analysis System 有权
    在解调器和频谱分析系统之间共享AGC环路

    公开(公告)号：US20090291657A1

    公开(公告)日：2009-11-26

    申请号：US12125563

    申请日：2008-05-22

    申请人： David Kloper ,  Yohannes Tesfai ,  Chandra Vaidyanathan

    发明人： David Kloper ,  Yohannes Tesfai ,  Chandra Vaidyanathan

    IPC分类号： H04B1/06

    CPC分类号： H03G3/3078 ,  H03G3/3068

    摘要： Systems and methods for sharing an AGC loop between a wireless data demodulator and a spectrum analysis module that operates simultaneously with the data demodulator. In one embodiment, a predetermined hold time prevents the AGC loop from changing gain too often, thereby allowing the spectrum analysis module to collect reliable data. In another embodiment, the hold time may be extended to coincide with a spectrum analysis event, such as a boundary of an FFT block. In still another embodiment, an FFT valid signal is provided such that collected FFT blocks can be designated as suspect and then subsequently processed accordingly.

    摘要翻译： 用于在无线数据解调器和与数据解调器同时工作的频谱分析模块之间共享AGC环路的系统和方法。 在一个实施例中，预定的保持时间防止AGC环路频繁地改变增益，从而允许频谱分析模块收集可靠的数据。 在另一个实施例中，保持时间可以被扩展以与诸如FFT块的边界的频谱分析事件一致。 在另一个实施例中，提供FFT有效信号，使得收集的FFT块可以被指定为可疑，然后相应地进行处理。

    System and method for high resolution indoor positioning using a narrowband RF transceiver
    5.
    发明授权
    System and method for high resolution indoor positioning using a narrowband RF transceiver 失效
    使用窄带RF收发器进行高分辨率室内定位的系统和方法

    公开(公告)号：US08179816B1

    公开(公告)日：2012-05-15

    申请号：US13286649

    申请日：2011-11-01

    申请人： Chandra Vaidyanathan ,  Gary L Sugar ,  Yohannes Tesfai

    发明人： Chandra Vaidyanathan ,  Gary L Sugar ,  Yohannes Tesfai

    IPC分类号： H04L1/00 ,  H04L12/26 ,  H04J4/00

    CPC分类号： G01S1/20 ,  G01S1/024 ,  G01S5/021 ,  G01S5/0226 ,  G01S5/14 ,  H04B1/69 ,  H04W64/00

    摘要： A sequence of two or more signals representing two or more data packets is transmitted through a wireless channel using a transmitter device. The two or more signals are a result of two or more transmissions that are made sequentially in time at different center frequencies in order to span a desired bandwidth. At least one of the two or more signals includes a physical layer preamble. The sequence of two or more signals is received using a receiver device. A time of arrival of one or more signals of the received sequence is calculated using one or more of the received sequence, the time differences among the two or more transmissions, the different center frequencies, information from the two or more data packets, and any carrier phase differences among the two or more transmissions using the receiver device.

    摘要翻译： 通过使用发射机设备的无线信道来发送表示两个或更多个数据分组的两个或更多个信号的序列。 两个或更多个信号是在不同的中心频率上按时间顺序进行的两个或多个传输的结果，以便跨越期望的带宽。 两个或更多个信号中的至少一个包括物理层前导码。 使用接收器装置接收两个或更多个信号的序列。 使用所接收的序列中的一个或多个，两个或多个传输之间的时间差，不同的中心频率，来自两个或多个数据分组的信息，以及任何 使用接收机设备的两个或更多个传输之间的载波相位差。

    Capturing and using radio events
    6.
    发明授权
    Capturing and using radio events 有权
    捕获和使用无线电活动

    公开(公告)号：US08111783B2

    公开(公告)日：2012-02-07

    申请号：US12140707

    申请日：2008-06-17

    申请人： David Kloper ,  Yohannes Tesfai ,  Chandra Vaidyanathan

    发明人： David Kloper ,  Yohannes Tesfai ,  Chandra Vaidyanathan

    IPC分类号： H03K9/00 ,  H04L27/00

    CPC分类号： H04B17/318 ,  G01S7/021 ,  H04L7/04

    摘要： In one embodiment a method includes, collecting in-phase/quadrature (I/Q) data representing energy detected by a radio in a frequency band, performing a fast Fourier transform (FFT) on the I/Q data resulting in a stream of FFT blocks, identifying using the stream of FFT blocks a pulse in the frequency band, recording in a radio events record (RER) a plurality of radio events and corresponding timestamps that are indicative, respectively, of a type and time of individual state changes in the radio during the collecting step, and, for example, using at least two of the radio events to identify, in the time domain, a beginning time and end time of the pulse detected in the stream of FFT blocks.

    摘要翻译： 在一个实施例中，一种方法包括：收集表示在频带中由无线电装置检测到的能量的同相/正交（I / Q）数据，对I / Q数据执行快速傅里叶变换（FFT），得到FFT流 块，使用FFT流来识别在频带中的脉冲，记录在无线电事件记录（RER）中的多个无线电事件和对应的时间戳，分别指示各个状态变化的类型和时间 在收集步骤期间，例如，使用至少两个无线电事件在时域中识别在FFT块流中检测到的脉冲的开始时间和结束时间。

    System and method for antenna diversity using joint maximal ratio combining
    8.
    发明授权
    System and method for antenna diversity using joint maximal ratio combining 失效
    使用联合最大比组合的天线分集的系统和方法

    公开(公告)号：US06687492B1

    公开(公告)日：2004-02-03

    申请号：US10174728

    申请日：2002-06-19

    申请人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Yohannes Tesfai

    发明人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Yohannes Tesfai

    IPC分类号： H04B106

    CPC分类号： H04L5/0007 ,  H01Q3/28 ,  H03G3/3042 ,  H03G3/3089 ,  H04B1/0483 ,  H04B7/0417 ,  H04B7/0615 ,  H04B7/0617 ,  H04B7/0669 ,  H04B7/0671 ,  H04B7/0845 ,  H04B7/0848 ,  H04B7/0854 ,  H04B7/0857 ,  H04L1/06 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0242 ,  H04L25/03343 ,  H04L27/2602 ,  H04L27/2626 ,  H04L2025/03426 ,  H04L2025/03611 ,  H04W52/42

    摘要： A composite beamforming technique is provided wherein a first communication device has a plurality of antennas and the second communication has a plurality of antennas. When the first communication device transmits to the second communication device, the transmit signal is multiplied by a transmit weight vector for transmission by each the plurality of antennas and the transmit signals are received by the plurality of antennas at the second communication device. The second communication device determines the best receive weight vector for the its antennas, and from that vector, derives a suitable transmit weight vector for transmission on the plurality of antennas back to the first communication device. Several techniques are provided to determine the optimum transmit weight vector and receive weight vector for communication between the first and second communication devices so that there is effectively joint or composite beamforming between the communication devices.

    摘要翻译： 提供一种组合波束形成技术，其中第一通信设备具有多个天线，并且第二通信具有多个天线。 当第一通信设备向第二通信设备发送时，将发送信号乘以用于由多个天线中的每一个发送的发送权重向量，并且在第二通信设备处由多个天线接收发送信号。 第二通信设备确定其天线的最佳接收权重向量，并且从该向量导出用于在多个天线上发送回到第一通信设备的合适的发射权重向量。 提供了几种技术来确定用于第一和第二通信设备之间的通信的最佳发送权重向量和接收权重向量，使得在通信设备之间有效地进行联合或合成波束形成。

    High resolution wireless indoor positioning system for legacy standards-based narrowband mobile radios
    9.
    发明授权
    High resolution wireless indoor positioning system for legacy standards-based narrowband mobile radios 有权
    高分辨率无线室内定位系统，用于传统基于标准的窄带移动无线电

    公开(公告)号：US09014172B2

    公开(公告)日：2015-04-21

    申请号：US13602451

    申请日：2012-09-04

    申请人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Yohannes Tesfai

    发明人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Yohannes Tesfai

    IPC分类号： H04J3/06 ,  G01S5/02

    CPC分类号： G01S5/0221 ,  G01S5/021 ,  G01S5/0215 ,  G01S5/06

    摘要： Two or more data packets transmitted through a wireless channel are received using a receiver device. The two or more data packets are a result of two or more transmissions that are made sequentially in time at different center frequencies in order to span a desired bandwidth. Each data packet of the two or more data packets is transmitted at a single center frequency. Time differences and/or carrier phase differences among the two or more transmissions are estimated. A time-of-arrival of one or more data packets of the two or more data packets is calculated using each data packet of the two or more data packets and one or more of the estimated time differences, the different center frequencies, and the estimated carrier phase differences.

    摘要翻译： 通过无线信道发送的两个或多个数据分组使用接收机设备接收。 两个或多个数据分组是在不同的中心频率上按时间顺序进行的两个或多个传输的结果，以便跨越期望的带宽。 两个或多个数据分组的每个数据分组以单个中心频率发送。 估计两个或更多个传输之间的时差和/或载波相位差。 使用两个或多个数据分组的每个数据分组来计算两个或多个数据分组的一个或多个数据分组的到达时间，并且估计的时间差，不同的中心频率和估计的 载波相位差。

    HIGH RESOLUTION WIRELESS INDOOR POSITIONING SYSTEM FOR LEGACY STANDARDS-BASED NARROWBAND MOBILE RADIOS
    10.
    发明申请
    HIGH RESOLUTION WIRELESS INDOOR POSITIONING SYSTEM FOR LEGACY STANDARDS-BASED NARROWBAND MOBILE RADIOS 失效
    高分辨率无线室内定位系统，用于基于标准的窄带移动无线电

    公开(公告)号：US20120120834A1

    公开(公告)日：2012-05-17

    申请号：US13355557

    申请日：2012-01-22

    申请人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Yohannes Tesfai

    发明人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Yohannes Tesfai

    IPC分类号： H04W24/00 ,  H04L12/26

    CPC分类号： G01S5/0221 ,  G01S5/021 ,  G01S5/0215

    摘要： Two or more data packets transmitted through a wireless channel are received using a receiver device. The two or more data packets are a result of two or more transmissions that are made sequentially in time at different center frequencies in order to span a desired bandwidth. Each data packet of the two or more data packets is transmitted at a single center frequency. Time differences and/or carrier phase differences among the two or more transmissions are estimated. A time-of-arrival of one or more data packets of the two or more data packets is calculated using each data packet of the two or more data packets and one or more of the estimated time differences, the different center frequencies, and the estimated carrier phase differences.

    摘要翻译： 通过无线信道发送的两个或多个数据分组使用接收机设备接收。 两个或多个数据分组是在不同的中心频率上按时间顺序进行的两个或多个传输的结果，以便跨越期望的带宽。 两个或多个数据分组的每个数据分组以单个中心频率发送。 估计两个或更多个传输之间的时差和/或载波相位差。 使用两个或多个数据分组的每个数据分组来计算两个或多个数据分组的一个或多个数据分组的到达时间，并且估计的时间差，不同的中心频率和估计的 载波相位差。