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    Scalable spread-spectrum signal detection and acquisition processor
    1.
    发明授权
    Scalable spread-spectrum signal detection and acquisition processor 有权
    可扩展扩频信号检测和采集处理器

    公开(公告)号：US06621855B1

    公开(公告)日：2003-09-16

    申请号：US09318853

    申请日：1999-05-26

    申请人： Nick Andrew Van Stralen ,  Richard August Korkosz ,  Gary Jude Saulnier ,  John Erik Hershey ,  Naofal Mohammed Wassel Al-Dhahir

    发明人： Nick Andrew Van Stralen ,  Richard August Korkosz ,  Gary Jude Saulnier ,  John Erik Hershey ,  Naofal Mohammed Wassel Al-Dhahir

    IPC分类号： H04B169

    CPC分类号： H04B1/70752 ,  H04B1/708

    摘要： A method allows determination of the presence of, the frequency of, and or the timing of a coded signal distributed in time, as for example a direct-sequence spread-spectrum signal or a signal having a coded header. According to the method, the received signal is correlated (16, 216, 316) with small sections of the spreading or header code, to produce partial correlations, as for example a 1024-chip spreading code is correlated in eight- or sixteen-chip portions. The result of each partial correlation is delayed (32, 232, 332/350) by an amount which results in temporal congruence or simultaneous occurrence of the partial correlations at a Doppler processor. The processor processes the simultaneous partial correlations, to produce signals which recur in the appropriate frequency bin at the recurrence rate of the spreading code. The frequency bin identifies the frequency of the received signals, and the time of the appearance of the signals at the bins is indicative of the time.

    摘要翻译： 一种方法允许确定在时间上分布的编码信号的存在，频率和/或定时，例如直接序列扩频信号或具有编码报头的信号。 根据该方法，接收信号与扩展或报头代码的小部分相关（16,216,316），以产生部分相关性，例如1024个码片扩展码在八或十六个芯片中相关 部分。 每个部分相关的结果被延迟（32,232,332/350）一个量，这导致在多普勒处理器处的部分相关性的时间一致性或同时发生。 处理器处理同时的部分相关，以产生以扩展码的复现速率在适当频率仓中重复的信号。 频率仓识别接收到的信号的频率，并且信号在信息箱出现的时间表示时间。

    Identification of an identifiable code sequence in a received signal by correlation with summed different-phase replicas of the sequence
    2.
    发明授权
    Identification of an identifiable code sequence in a received signal by correlation with summed different-phase replicas of the sequence 失效
    通过与序列的相加不相位复制相关来识别接收信号中的可识别码序列

    公开(公告)号：US06668012B1

    公开(公告)日：2003-12-23

    申请号：US09353655

    申请日：1999-07-15

    申请人： John Erik Hershey ,  Richard August Korkosz ,  Gary Jude Saulnier ,  Naofal Mohammed Wassel Al-Dhahir

    发明人： John Erik Hershey ,  Richard August Korkosz ,  Gary Jude Saulnier ,  Naofal Mohammed Wassel Al-Dhahir

    IPC分类号： H04L2730

    CPC分类号： H04B1/70753 ,  H04B1/7077

    摘要： A receiver for a unique word sequence or a spreading code sequence includes a memory which is preloaded with all possible phases of the code. The sequence in the received signal is correlated, in parallel, with sums of various ones of the different phases of the code. Thus, the received code is correlated with all possible phases of a replica of its own code. Consequently, one of the sums will exhibit a correlation peak, which indicates that the desired phase of the code is included in that particular sum. The other sums will not exhibit a correlation peak, and are is discarded. The different phases in the one sum which displayed correlation are divided into new sums, each having fewer phases, and the correlation is again performed. Again, those sums exhibiting no correlation are discarded, and the sum exhibiting correlation is divided into sums of fewer codes.

    摘要翻译： 用于唯一字序列或扩展码序列的接收机包括预先加载有代码的所有可能相位的存储器。 并行地将接收信号中的序列与码的不同相位的和进行相加。 因此，接收到的代码与其自己的代码的副本的所有可能的相位相关联。 因此，总和中的一个将呈现相关峰值，这表示代码的期望相位被包括在该特定和中。 其他总和将不会呈现相关峰值，并被丢弃。 显示相关性的一个和中的不同相位被分成新的和，每个相位具有较少的相位，并且再次执行相关性。 再次，表示没有相关性的那些和被丢弃，并且显示相关性的和被划分为较少代码的和。

    Method and apparatus for filtering digital television signals
    4.
    发明授权
    Method and apparatus for filtering digital television signals 失效
    数字电视信号滤波方法和装置

    公开(公告)号：US6122015A

    公开(公告)日：2000-09-19

    申请号：US206409

    申请日：1998-12-07

    申请人： Naofal Mohammed Wassel Al-Dhahir ,  John Erik Hershey ,  Nick Andrew Van Stralen ,  Richard Louis Frey ,  Mark Lewis Grabb

    发明人： Naofal Mohammed Wassel Al-Dhahir ,  John Erik Hershey ,  Nick Andrew Van Stralen ,  Richard Louis Frey ,  Mark Lewis Grabb

    IPC分类号： H04N5/21 ,  H04N5/213

    CPC分类号： H04N5/211 ,  Y10S348/914

    摘要： A system for filtering digital television signals is provided. The system comprises a generator for providing a first data sequence to a private data packetizer, and a transmitter for transmitting the packetized first data sequence in a data channel of a digital television signal. The system further includes a receiver for receiving the digital television signal and recovering the first data sequence. The receiver includes a channel estimator for providing an estimate of channel characteristics, such as estimated channel impulse estimate and estimated noise variance. The receiver further includes an adaptive equalizer filter having an input for receiving the digital television signal and an input for receiving adaptive filter coefficients. The receiver further includes a coefficient processor for calculating adaptive filter coefficients based on the channel estimate, and providing the adaptive filter coefficients to the adaptive equalizer filter. The digital television signal is thus filtered to remove undesired channel effects.

    摘要翻译： 提供了一种用于过滤数字电视信号的系统。 该系统包括用于向专用数据分组器提供第一数据序列的发生器和用于在数字电视信号的数据信道中发送分组化的第一数据序列的发射机。 该系统还包括用于接收数字电视信号并恢复第一数据序列的接收机。 接收机包括用于提供信道特性的估计的信道估计器，例如估计的信道脉冲估计和估计的噪声方差。 接收机还包括具有用于接收数字电视信号的输入端和用于接收自适应滤波器系数的输入端的自适应均衡器滤波器。 接收机还包括系数处理器，用于基于信道估计来计算自适应滤波器系数，并将自适应滤波器系数提供给自适应均衡器滤波器。 因此数字电视信号被滤波以去除不需要的信道效应。

    System and method for directing an adaptive antenna array
    5.
    发明授权
    System and method for directing an adaptive antenna array 有权
    用于引导自适应天线阵列的系统和方法

    公开(公告)号：US06275187B1

    公开(公告)日：2001-08-14

    申请号：US09227371

    申请日：1999-01-08

    申请人： John Anderson Fergus Ross ,  John Erik Hershey ,  Richard August Korkosz ,  Naofal Mohammed Wassel Al-Dhahir

    发明人： John Anderson Fergus Ross ,  John Erik Hershey ,  Richard August Korkosz ,  Naofal Mohammed Wassel Al-Dhahir

    IPC分类号： H01Q322

    CPC分类号： G08C15/12 ,  G08C17/02 ,  H01Q1/241 ,  H01Q1/246 ,  H01Q1/28 ,  H01Q1/32 ,  H01Q1/3233 ,  H01Q3/2605 ,  H04B7/18502 ,  H04B7/18506

    摘要： A system for directing a receiving lobe of an adaptive antenna array toward an aircraft in flight includes an aircraft position vector calculator and an antenna weight vector generator. The aircraft position vector calculator receives aircraft position information from an aircraft tracking service and calculates, based upon the aircraft position information it receives, an aircraft position vector g. An antenna weight vector generator receives the aircraft position vector g from the aircraft position vector calculator and generates, based upon the aircraft position vector g, an antenna element weight vector w. The antenna weight vector w is applied to the elements of an adaptive antenna array to direct a receiving lobe of the array towards an aircraft in flight.

    摘要翻译： 用于将自适应天线阵列的接收波瓣引导到飞行中的飞行器的系统包括飞行器位置矢量计算器和天线加权矢量发生器。 飞行器位置矢量计算器从飞机跟踪服务器接收飞机位置信息，并且基于其接收到的飞行器位置信息来计算飞行器位置矢量g。 天线权重向量生成器从飞行器位置矢量计算器接收飞机位置矢量g，并且基于飞机位置向量g生成天线元重量向量w。 天线权重向量w被施加到自适应天线阵列的元件，以将阵列的接收波瓣引向飞行中的飞行器。

    Spacecraft communication channel power control system
    6.
    发明授权
    Spacecraft communication channel power control system 失效
    航天通信通道功率控制系统

    公开(公告)号：US5828335A

    公开(公告)日：1998-10-27

    申请号：US554131

    申请日：1995-11-06

    申请人： Naofal Mohammed Wassel Al-Dhahir ,  John Erik Hershey ,  Gary Jude Saulnier

    发明人： Naofal Mohammed Wassel Al-Dhahir ,  John Erik Hershey ,  Gary Jude Saulnier

    IPC分类号： H04B7/185

    CPC分类号： H04B7/18543

    摘要： A control system for the uplink transmitter of a ground station communicating with a spacecraft includes an antenna located at the ground station, pointed toward the spacecraft for receiving downlink signals transmitted therefrom. The received signals are accompanied by noise attributable to ambient, sky and ground temperatures. A low-noise receiver is coupled to the output port of the antenna, for establishing the receiver noise temperature. A processor is coupled to the low-noise receiver apparatus and to the power control input port of the uplink transmitter, for responding to changes in the received noise power attributable to the presence or absence of precipitation in the downlink. The processor does this by producing an estimate of the attenuation attributable to the rain in the downlink, and generates the control signal in response to the estimate of the attenuation. The control signal increases the signal power of the uplink transmitter in response to increases in the estimate of the rain attenuation, and decreases the signal power of the uplink transmitter in response to decreases in the estimate of the rain attenuation. The processor determines the downlink rain attenuation L.sub.a,D by L.sub.a,D f(.DELTA.N.sub.R)=T.sub.eff /(1+T.sub.eff -.DELTA.N.sub.R) where T.sub.eff =(T.sub.amb -T.sub.sky)/(T.sub.LNA +T.sub.g +T.sub.sky)

    摘要翻译： 用于与航天器通信的地面站的上行链路发射机的控制系统包括位于地面站的天线，指向航天器，用于接收从其发射的下行链路信号。 收到的信号伴随着环境，天空和地面温度的噪音。 低噪声接收器耦合到天线的输出端口，用于建立接收机噪声温度。 处理器耦合到低噪声接收机设备和上行链路发射机的功率控制输入端口，以响应归因于下行链路中是否存在降水的接收噪声功率的变化。 处理器通过产生归因于下行链路中的雨的衰减的估计来做到这一点，并且响应于衰减的估计而产生控制信号。 控制信号响应于雨衰的估计的增加而增加上行链路发射机的信号功率，并且响应于雨衰的估计的减小而降低上行链路发射机的信号功率。 处理器确定下行链路衰减衰减La，D byLa，D + Z f（DELTA NR）= Teff /（1 + Teff-DELTA NR）其中Teff =（Tamb-Tsky）/（TLNA + Tg + Tsky）

    Method and apparatus for performing power control using the wide-band synchronization
    10.
    发明授权
    Method and apparatus for performing power control using the wide-band synchronization 失效
    使用宽带同步进行功率控制的方法和装置

    公开(公告)号：US5708966A

    公开(公告)日：1998-01-13

    申请号：US644643

    申请日：1996-04-04

    申请人： Naofal Mohammed Wassel Al-Dhahir ,  Gary Jude Saulnier ,  John Erik Hershey

    发明人： Naofal Mohammed Wassel Al-Dhahir ,  Gary Jude Saulnier ,  John Erik Hershey

    IPC分类号： H04B7/185

    CPC分类号： H04B7/18543

    摘要： A communications system includes first and second ground stations and a spacecraft repeater. Data signals are transmitted between ground stations by way of the repeater, together with spread-spectrum ranging signals. Uplink rain attenuation is compensated for changing the transmitted power at the ground stations. The amount of downlink attenuation is determined by measuring the total carrier-to-noise ratio in three paths, station 1 to station 2, station 2 to station 1, and station 1 to station 1. With these three values of total attenuation, the two downlink attenuations and the number of active signals traversing the repeater can be determined. The downlink attenuations are converted to uplink attenuations, and used to control the transmitters.

    摘要翻译： 通信系统包括第一和第二地面站和航天器中继器。 数据信号通过中继器在地面站之间以及扩频测距信号一起传输。 补偿上行链路雨衰，以改变地面站的发射功率。 下行链路衰减的量通过测量从站1到站2，站2到站1和站1到站1的三个路径中的总载波信噪比来确定。利用这三个总衰减值，两个 可以确定下行链路衰减和穿过中继器的有效信号的数量。 下行链路衰减被转换为上行链路衰减，用于控制发射机。