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    Equalizer with decision feedback frequency tracking and bit decoding for spread spectrum communications
    5.
    发明授权
    Equalizer with decision feedback frequency tracking and bit decoding for spread spectrum communications 有权
    具有用于扩频通信的判决反馈频率跟踪和比特解码的均衡器

    公开(公告)号：US07236510B2

    公开(公告)日：2007-06-26

    申请号：US10676798

    申请日：2003-10-01

    申请人： W. Kurt Dobson ,  Dirk Ostermiller ,  Sy Prestwich ,  Scott Bevan

    发明人： W. Kurt Dobson ,  Dirk Ostermiller ,  Sy Prestwich ,  Scott Bevan

    IPC分类号： H04B1/69

    CPC分类号： H04J13/0077 ,  H04B1/7093 ,  H04L25/03114

    摘要： A spread spectrum communications system adapted to receive simultaneous signals from multiple transmitters, separates frequency error and equalizes and decodes continuous streams of data sets from a plurality of matched filters with frequency correction and which sorts through data and successfully decodes data bits. The spread spectrum communications system includes a transmitter and a receiver. The receiver includes an RF receiver. At least one PNB matched filter receives signals from the RF receiver. A plurality of frequency shifters receives a signal from the at least one PNB matched filter. A plurality of PNA matched filters receives data from the at least one PNB matched filter and the plurality of frequency shifters. An equalizer/decoder receives signals from the plurality of PNA matched filters.

    摘要翻译： 扩展频谱通信系统，适于从多个发射机接收同时信号，分离频率误差，并对来自具有频率校正的多个匹配滤波器的连续数据流流进行均衡和解码，并通过数据进行排序并成功解码数据位。 扩频通信系统包括发射机和接收机。 接收机包括RF接收机。 至少一个PNB匹配滤波器从RF接收器接收信号。 多个移频器从至少一个PNB匹配滤波器接收信号。 多个PNA匹配滤波器从至少一个PNB匹配滤波器和多个频率移位器接收数据。 均衡器/解码器从多个PNA匹配滤波器接收信号。

    Burst spread spectrum radio system and method for asset tracking and data telemetry
    6.
    发明授权
    Burst spread spectrum radio system and method for asset tracking and data telemetry 有权
    突发扩频无线电系统和资产跟踪和数据遥测方法

    公开(公告)号：US07606288B2

    公开(公告)日：2009-10-20

    申请号：US11140081

    申请日：2005-05-27

    申请人： Sy Prestwich ,  Scott Bevan ,  Dirk Ostermiller ,  K. Deric Eldredge

    发明人： Sy Prestwich ,  Scott Bevan ,  Dirk Ostermiller ,  K. Deric Eldredge

    IPC分类号： H04B1/00

    CPC分类号： H04B1/7087 ,  G01C21/206 ,  G01S5/0221 ,  G01S5/06 ,  H04J13/107

    摘要： A system for wireless asset tracking is disclosed. The system includes a plurality of mobile devices. Each mobile device performs two spreading operations with two distinct PN codes, a first PN code and a second PN code. Data is transmitted by each mobile device using a burst direct sequence spread spectrum radio signal. The system also includes at least three base stations. Each base station is configured to receive the burst direct sequence spread spectrum radio signals from the mobile devices which includes decoding the signals by first de-spreading with the second PN code and second de-spreading with the first PN code. Each base station is further configured to add a timestamp to each data packet received. A system for calculating the location of the mobile devices creates location information for each mobile device by calculating the time difference of arrival of received bursts for each base station.

    摘要翻译： 公开了一种用于无线资产跟踪的系统。 该系统包括多个移动设备。 每个移动设备使用两个不同的PN码，第一PN码和第二PN码来执行两个扩展操作。 每个移动设备使用突发直接序列扩频无线电信号发送数据。 该系统还包括至少三个基站。 每个基站被配置为从移动设备接收突发直接序列扩频无线电信号，其包括通过用第二PN码进行第一解扩展和用第一PN码进行第二解扩展来对信号进行解码。 每个基站还被配置为向接收到的每个数据分组添加时间戳。 用于计算移动设备的位置的系统通过计算每个基站的接收脉冲串的到达时间差来创建每个移动设备的位置信息。

    Burst spread spectrum radio system and method for asset tracking and data telemetry
    7.
    发明申请
    Burst spread spectrum radio system and method for asset tracking and data telemetry 有权

    公开(公告)号：US20060268961A1

    公开(公告)日：2006-11-30

    申请号：US11140081

    申请日：2005-05-27

    申请人： Sy Prestwich ,  Scott Bevan ,  Dirk Ostermiller ,  K. Eldredge

    发明人： Sy Prestwich ,  Scott Bevan ,  Dirk Ostermiller ,  K. Eldredge

    IPC分类号： H04B1/00

    CPC分类号： H04B1/7087 ,  G01C21/206 ,  G01S5/0221 ,  G01S5/06 ,  H04J13/107

    摘要： A system for wireless asset tracking is disclosed. The system includes a plurality of mobile devices. Each mobile device performs two spreading operations with two distinct PN codes, a first PN code and a second PN code. Data is transmitted by each mobile device using a burst direct sequence spread spectrum radio signal. The system also includes at least three base stations. Each base station is configured to receive the burst direct sequence spread spectrum radio signals from the mobile devices which includes decoding the signals by first de-spreading with the second PN code and second de-spreading with the first PN code. Each base station is further configured to add a timestamp to each data packet received. A system for calculating the location of the mobile devices creates location information for each mobile device by calculating the time difference of arrival of received bursts for each base station.

    Matched filter for scalable spread spectrum communications systems
    8.
    发明授权
    Matched filter for scalable spread spectrum communications systems 有权
    可扩展扩频通信系统的匹配滤波器

    公开(公告)号：US07092426B2

    公开(公告)日：2006-08-15

    申请号：US10670708

    申请日：2003-09-24

    申请人： W. Kurt Dobson ,  Dirk Ostermiller ,  Sy Prestwich ,  Scott Bevan

    发明人： W. Kurt Dobson ,  Dirk Ostermiller ,  Sy Prestwich ,  Scott Bevan

    IPC分类号： H04B1/69

    CPC分类号： H04J13/0022 ,  H04B1/7093 ,  H04B2201/70703 ,  H04B2201/70707

    摘要： A spread spectrum communications system uses long, scalable PN sequences to achieve variable communication rates. A low-complexity and scalable matched filter architecture is used to provide a large processing gain and robust recovery of multiple devices in long reach, high ambient-noise environments. The spread spectrum communications system includes a transmitter and a receiver. The receiver includes an RF receiver and a first matched filter receiving data from the RF receiver. A plurality of phase/frequency shifters receives a signal from the first matched filter. A plurality of second matched filters receive data from the plurality of phase/frequency shifters. An equalizer/decoder receives signals from the plurality of phase/frequency shifters.

    摘要翻译： 扩频通信系统使用长的可扩展的PN序列来实现可变的通信速率。 低复杂度和可扩展的匹配滤波器架构用于在长距离，高环境噪声环境中提供大的处理增益和强大的多个器件的恢复。 扩频通信系统包括发射机和接收机。 接收机包括RF接收机和从RF接收机接收数据的第一匹配滤波器。 多个相位/频率移位器从第一匹配滤波器接收信号。 多个第二匹配滤波器从多个相位/频率移位器接收数据。 均衡器/解码器从多个相位/频率移位器接收信号。

    Matched filter for scalable spread spectrum communications systems
    10.
    发明授权
    Matched filter for scalable spread spectrum communications systems 失效
    可扩展扩频通信系统的匹配滤波器

    公开(公告)号：US07280579B2

    公开(公告)日：2007-10-09

    申请号：US11427256

    申请日：2006-06-28

    申请人： W. Kurt Dobson ,  Dirk Ostermiller ,  Sy Prestwich ,  Scott Bevan

    发明人： W. Kurt Dobson ,  Dirk Ostermiller ,  Sy Prestwich ,  Scott Bevan

    IPC分类号： H04B1/69

    CPC分类号： H04J13/0022 ,  H04B1/7093 ,  H04B2201/70703 ,  H04B2201/70707

    摘要： A transmitter for a spread spectrum communications system may include a data source, a first multiplier/mixer spreading data from said data source with a first pseudo noise source, a second multiplier/mixer spreading data from said first mixer with a second pseudo noise source, and an RF transmitter. A receiver for a spread spectrum communications system may include an RF receiver, a first matched filter receiving data from said RF receiver, a plurality of phase/frequency shifters receiving a signal from said first matched filter, a plurality of second matched filters receiving data from said plurality of phase/frequency shifters, and an equalizer/decoder receiving signals from said plurality of second matched filters.

    摘要翻译： 用于扩频通信系统的发射机可以包括数据源，第一乘法器/混频器从所述数据源扩展具有第一伪噪声源的数据，第二乘法器/混频器使用第二伪噪声源从所述第一混频器扩展数据， 和RF发射机。 用于扩频通信系统的接收机可以包括RF接收机，从所述RF接收机接收数据的第一匹配滤波器，从所述第一匹配滤波器接收信号的多个相位/频率移位器，多个第二匹配滤波器， 所述多个相位/频率移位器以及从所述多个第二匹配滤波器接收信号的均衡器/解码器。