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公开(公告)号：US07639731B1
公开(公告)日：2009-12-29
申请号：US11416620
申请日：2006-05-03
申请人： Carlos J. Chavez , Robert J. Frank
发明人： Carlos J. Chavez , Robert J. Frank
IPC分类号： H04B1/00
CPC分类号： H04B1/036
摘要： A receiver for carrier frequency estimation via symbol rate estimation in the presence of carrier frequency error for use in signal acquisition and signal demodulation of spread-spectrum chips affected by Doppler shift in an advanced tactical data link. Received LPD signals with a very low signal-to-noise ratio are input to a receiver designed to tolerate carrier frequency error caused by Doppler shift. Extremely low signal-to-noise ratio and short dwell times due to spread spectrum modulation and frequency-hopping make direct estimation of carrier frequency impractical. A method and apparatus is disclosed to use the error is symbol rate, the nominal carrier frequency, and the nominal transmitted symbol rate to estimate carrier frequency error. This enables longer coherent integration times and improves LPD receiver performance.
摘要翻译： 在存在载波频率误差的情况下通过符号率估计的载波频率估计的接收机，用于在高级战术数据链路中受多普勒频移影响的扩频码片的信号采集和信号解调。 具有非常低的信噪比的接收LPD信号被输入到设计用于容忍由多普勒频移引起的载波频率误差的接收机。 由于扩展频谱调制和跳频导致极低的信噪比和较短的驻留时间使载波频率的直接估计不切实际。 公开了一种使用错误是符号率，标称载波频率和标称传输符号速率来估计载波频率误差的方法和装置。 这使得能够实现更长的相干集成时间并提高LPD接收机的性能。
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公开(公告)号：US07606290B1
公开(公告)日：2009-10-20
申请号：US11416621
申请日：2006-05-03
IPC分类号： H04B1/00
CPC分类号： H04B1/7075
摘要： An architecture for a spread-spectrum transmitter-receiver system in an advanced tactical data link that allows the receiver to readily acquire and synchronize to a desired LPD signal. Signal acquisition is performed with a cyclic range search that uses multiple redundant known sequences mapped to a known message sequence in a highly repeated manner. By employing the invariance of the speed of light, and synchronicity between transmitter and receiver, the architecture can significantly reduce the computational complexity of the receiver. Additionally, the architecture enables ad hoc channel access, controlled latency, distance estimation, and distance-directed transmissions.
摘要翻译： 用于高级战术数据链路中的扩频发射机 - 接收机系统的架构，其允许接收机容易地获取并同步到期望的LPD信号。 以循环范围搜索进行信号采集，循环范围搜索使用以高度重复的方式映射到已知消息序列的多个冗余已知序列。 通过采用光速不变性和发射机与接收机之间的同步性，该架构可以显着降低接收机的计算复杂度。 此外，该体系结构可实现自组织频道访问，受控延迟，距离估计和距离定向传输。
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公开(公告)号：US07508887B1
公开(公告)日：2009-03-24
申请号：US11220236
申请日：2005-09-06
CPC分类号： H04L5/1423 , H04L25/061
摘要： A method and apparatus for signal acquisition with transmit blanking compensation compensates for collisions between a desired received signal and a transmitted signal. A blanking block blanks a received signal when the transmitted signal is transmitted and stops blanking when the transmitted signal stops to provide a received signal with blanking. A correlation block correlates the received signal with blanking with a known sequence of symbols corresponding to the desired received signal and outputs a correlation metric and a number of symbols blanked. Means for adjusting the correlation metric or a variable threshold using the number of symbols blanked are provided. A decision block compares the adjusted correlation metric to a fixed threshold or the correlation metric to the variable threshold. If the adjusted correlation metric exceeds the threshold or if the correlation metric exceeds the variable threshold, the decision block determines that the desired signal is detected.
摘要翻译： 用于具有发送消隐补偿的信号采集的方法和装置补偿期望的接收信号和发射信号之间的冲突。 当发送的信号被发送时，消隐块对接收到的信号进行空白，并且当发送的信号停止时停止消隐以提供接收信号的消隐。 相关块将接收到的信号与消隐对应于对应于期望接收信号的已知符号序列相关，并输出相关度量和消隐的符号数。 提供了用于使用消隐的符号数来调整相关度量或可变阈值的装置。 决策块将调整后的相关度量与固定阈值或相关度量与变量阈值进行比较。 如果调整的相关度量超过阈值，或者如果相关度量超过可变阈值，则判定块确定检测到期望的信号。
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公开(公告)号：US08184572B1
公开(公告)日：2012-05-22
申请号：US12002902
申请日：2007-12-19
IPC分类号： H04B7/212
CPC分类号： H04W72/1257 , H04B7/2656 , H04W84/10 , H04W88/02
摘要： A method is provided to control scheduling of transmission and reception by a TDMA radio. This method allows individual transmissions and receptions to be independently configured for different frequencies, coding rates, modulation schemes, in fact anything which the radio modem allows to be configured. In addition, this scheduling and configuration may be configured and reconfigured in real time without disrupting radio operations.
摘要翻译： 提供了一种用于控制TDMA无线电的发送和接收调度的方法。 该方法允许单独的传输和接收被独立地配置用于不同频率，编码速率，调制方案，实际上是无线调制解调器允许配置的任何东西。 此外，该调度和配置可以实时配置和重新配置，而不会中断无线电操作。
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公开(公告)号：US4025678A
公开(公告)日：1977-05-24
申请号：US704092
申请日：1976-07-09
申请人： Robert J. Frank
发明人： Robert J. Frank
CPC分类号： D06N3/0075 , B32B5/18 , Y10S428/904 , Y10T156/1059 , Y10T428/23943 , Y10T428/2395 , Y10T428/24438 , Y10T428/249981 , Y10T428/249984
摘要： The invention contemplates expanded-plastic coated fabric wherein the exposed surface of the expanded plastic is characterized by a random distribution of torn cellular pockets and by a random distribution of projecting free ends of flock elements which are rooted to the plastic at their other ends. Various methods of making the fabric are described, with different "hand" or "feel" depending upon the method and upon the materials and their dimensions.
摘要翻译： 本发明考虑了扩展塑料涂层织物，其中膨胀塑料的暴露表面的特征在于随机分布撕裂的细胞袋，并且通过在其另一端根植于塑料的绒毛元件的突出的自由端的随机分布来表征。 根据方法和材料及其尺寸，描述了制作织物的各种方法，具有不同的“手”或“感觉”。
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公开(公告)号：US08514130B1
公开(公告)日：2013-08-20
申请号：US13075645
申请日：2011-03-30
IPC分类号： H04B7/00
CPC分类号： H04B7/0491 , H01Q3/446 , H01Q9/32 , H01Q19/32
摘要： The present disclosure is directed to a system and method for providing directional spectral awareness via an antenna system which includes a single parasitic antenna and a processor, the processor being communicatively coupled with the parasitic antenna. The antenna system allows for quick scanning of all sectors included in a plurality of sectors of an RF environment being monitored by the antenna system. The antenna system also allows for monitoring sectors of interest. The directionality of the parasitic antenna of the antenna system may reduce interference and multipath along with providing improved SNR due to antenna gain, thereby allowing for collection of signals of interest in a more favorable environment, thereby enabling analysis such as frequency and spatial use, signal detection, signal identification, and source geolocation to succeed when it may have failed if an omni-directional antenna were used.
摘要翻译： 本公开涉及一种用于经由包括单个寄生天线和处理器的天线系统提供定向频谱感知的系统和方法，所述处理器与所述寄生天线通信耦合。 天线系统允许对由天线系统监控的RF环境的多个扇区中包括的所有扇区进行快速扫描。 天线系统还允许监视感兴趣的部门。 天线系统的寄生天线的方向性可以减少干扰和多路径以及由于天线增益而提供改善的SNR，从而允许在更有利的环境中收集感兴趣的信号，从而使得诸如频率和空间使用的信号 检测，信号识别和源地理位置，如果使用全向天线可能失败。
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17.发明授权公开(公告)号：US07957451B1
公开(公告)日：2011-06-07
申请号：US12074799
申请日：2008-03-06
申请人： David K. Baugh , Joseph F. Jiacinto , Robert J. Frank , Michael N. Newhouse , Dana J. Jensen , Kent D. Benson , Daniel M. Zange , Gunther B. Frank , Bruce S. Kloster , Richard L. Robertson , Karl F. Hoech
发明人： David K. Baugh , Joseph F. Jiacinto , Robert J. Frank , Michael N. Newhouse , Dana J. Jensen , Kent D. Benson , Daniel M. Zange , Gunther B. Frank , Bruce S. Kloster , Richard L. Robertson , Karl F. Hoech
IPC分类号： H04B1/00
CPC分类号： H04B1/7143
摘要： A spread spectrum communication system includes a transceiver configured to transmit a spread spectrum waveform. The spread spectrum waveform comprises transmitted signals at varying frequencies within a radio frequency spectrum of operation. The frequency variation is controlled according to a hopping sequence. A spectral sensor of the communication system is configured to dynamically scan the radio frequency spectrum of operation and to generate channel occupancy data based upon the scans. A real time hopping sequence generator is configured to dynamically generate the hopping sequence in real time as a function of the channel occupancy data.
摘要翻译： 扩频通信系统包括被配置为发射扩频波形的收发器。 扩频波形包括在操作的射频频谱内的变化频率的发射信号。 根据跳频序列控制频率变化。 通信系统的光谱传感器被配置为动态地扫描操作的射频频谱并且基于扫描生成信道占用数据。 实时跳频序列生成器被配置为根据信道占用数据实时动态生成跳频序列。
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18.发明授权Control of reconfigurable SIS/MAC protocols used in wireless communication devices 有权控制无线通信设备中使用的可重新配置的SIS / MAC协议公开(公告)号：US07450523B1
公开(公告)日：2008-11-11
申请号：US11194779
申请日：2005-08-01
IPC分类号： H04L12/26
CPC分类号： H04L41/082 , H04W8/245
摘要： A method, a device, and a system for reconfiguring communication transmission characteristics in response to a changing communication environment is provided. An environment at a communication device is characterized to determine if a transmission parameter associated with processing of a communication signal at a physical layer or a network interface layer should change based on current conditions at the communication device. If a need is identified, a second transmission parameter is selected based on the environment monitoring. A request identifying the second transmission parameter is sent to a manager device using an existing communication link. A response from the manager device is received indicating acceptance or rejection of use of the second transmission parameter in communicating with a second communication device. If the response indicates acceptance of use of the second transmission parameter, the physical layer and/or the network interface layer are reconfigured based on the selected second transmission parameter.
摘要翻译： 提供了一种响应于不断变化的通信环境来重新配置通信传输特性的方法，设备和系统。 通信设备的环境的特征在于确定与物理层或网络接口层处的通信信号的处理相关联的传输参数是否应当改变，基于通信设备的当前状况。 如果确定需要，则基于环境监视选择第二传输参数。 使用现有通信链路将识别第二传输参数的请求发送到管理器设备。 接收到来自管理器设备的响应，指示在与第二通信设备进行通信时接受或拒绝使用第二传输参数。 如果响应指示接受使用第二传输参数，则基于所选择的第二传输参数重新配置物理层和/或网络接口层。
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19.发明授权Relative navigation for precision rendezvous and station keeping using datalink signals 有权使用数据链路信号进行精密会合和站保持的相对导航公开(公告)号：US07418343B1
公开(公告)日：2008-08-26
申请号：US10848708
申请日：2004-05-19
IPC分类号： G01S1/08
CPC分类号： G01S13/765 , G01S3/36 , G01S13/88 , G01S19/51
摘要： A follower aircraft is guided to a lead aircraft using a datalink that determines range between the two. The lead aircraft has an antenna array and processing system for determining azimuth/elevation of the follower aircraft. The lead aircraft transmits a ranging message to the follower aircraft and stores a lead aircraft time of transmit (TOT) time. The ranging message is received at the follower aircraft and a follower aircraft time of reception (TOR) time is stored. A second ranging message is transmitted from the follower aircraft to the lead aircraft and a follower aircraft TOT time is stored. The second ranging message is received at the lead aircraft and a lead aircraft TOR is stored. A message is sent from the follower aircraft when follower aircraft TOT and TOR. The range and time offset is determined by the lead aircraft using follower aircraft TOT/TOR and stored lead aircraft TOT/TOR.
摘要翻译： 随动飞机使用确定两者之间范围的数据链来引导到主飞机。 引导飞机具有用于确定从动飞机的方位/仰角的天线阵列和处理系统。 主飞机向跟随飞机发送测距信息，并存储飞行时间（TOT）时间。 在跟随飞行器处接收测距消息，并存储跟随飞行器接收时间（TOR）时间。 第二范围消息从跟随飞行器发送到主飞机，并且存储随动飞机TOT时间。 在首飞机上接收到第二个测距信息，并且存储了引导飞机TOR。 随动飞机TOT和TOR发出信号。 范围和时间偏移由引擎飞机使用跟随飞机TOT / TOR和存储的引导飞机TOT / TOR确定。
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公开(公告)号：US07382846B1
公开(公告)日：2008-06-03
申请号：US10953224
申请日：2004-09-29
CPC分类号： H04L7/042 , H04L27/2017
摘要： A method of correlating a signal to a synchronization pattern is disclosed. The signal has a waveform with frequency and phase angle components that may be varied, at each repeated signal pulse, to communicate a change in a bit pattern of the signal. A synchronization pattern is generated using knowledge of phase rotation direction due to two consecutive bits in a synchronization key. The signal is compared with the synchronization pattern. It is determined whether the comparison of the signal and the synchronization pattern indicate a correlation between the signal and the synchronization pattern.
摘要翻译： 公开了一种将信号与同步模式相关联的方法。 信号具有在每个重复的信号脉冲下可以改变频率和相位角分量的波形，以传达信号的位模式的改变。 使用同步密钥中的两个连续比特的相位旋转方向的知识来生成同步模式。 该信号与同步模式进行比较。 确定信号和同步模式的比较是否表示信号和同步模式之间的相关性。
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