公开(公告)号：US07822157B2

公开(公告)日：2010-10-26

申请号：US10334191

申请日：2002-12-31

Applicant: Merle L. Keller ,  Samuel Charles Kingston ,  Steven Barham ,  Alan Earl Lundquist ,  Zachary C. Bagley ,  Warren Paul Willes ,  Raied N. Mazahreh ,  Steven J. McEntire

Inventor： Merle L. Keller ,  Samuel Charles Kingston ,  Steven Barham ,  Alan Earl Lundquist ,  Zachary C. Bagley ,  Warren Paul Willes ,  Raied N. Mazahreh ,  Steven J. McEntire

IPC: H04L7/00 ,  H04L7/04 ,  H04B7/15 ,  H04B7/185

CPC classification number: H04B1/7075 ,  H04B2201/70715

Abstract: A digital communication system includes a generator for generating a plurality of pulse trains, each having a different timing, and pre-compensation circuitry for synchronizing the plurality of pulse trains to a timing signal. The system also includes comparison circuitry for simultaneously comparing a received burst code signal to each of the plurality of pulse trains, where the burst code signal is synchronized to the timing signal, and a detector for detecting which of the pulse trains is a closest temporal match to the burst code signal. The pre-compensation circuitry operates to reduce acquisition time and keep PN code uncertainties within the range of the comparison circuitry.

Abstract translation: 数字通信系统包括用于产生每个具有不同定时的多个脉冲串的发生器和用于将多个脉冲序列同步到定时信号的预补偿电路。 该系统还包括比较电路，用于同时比较所接收的脉冲串码信号与多个脉冲串中的每个脉冲序列，其中突发码信号与定时信号同步，以及检测器，用于检测哪个脉冲序列是最接近的时间匹配 到突发码信号。 预补偿电路用于减少采集时间并将PN码不确定度保持在比较电路的范围内。

公开(公告)号：US07672415B1

公开(公告)日：2010-03-02

申请号：US11540136

申请日：2006-09-28

Applicant: Thomas R. Giallorenzi ,  Johnny M. Harris ,  Dan M. Griffin ,  Sam Kingston

Inventor： Thomas R. Giallorenzi ,  Johnny M. Harris ,  Dan M. Griffin ,  Sam Kingston

IPC: H04L7/00

CPC classification number: H04L7/043

Abstract: A system and method for detecting a presence and frequency offset of a spread spectrum radio frequency signal is disclosed. The method comprises receiving the spread spectrum radio signal. The signal can be sampled to form a plurality of signal samples. Each signal sample can be multiplied by a complex conjugate of a proximate signal sample to form a plurality of signal sample pairs. The signal sample pairs can be summed over a predetermined dwell time period to form a data vector having a magnitude and angle offset to enable detection of the signal and to enable a frequency offset between the spread spectrum radio frequency signal and a receiver frequency reference to be determined.

Abstract translation: 公开了一种用于检测扩频射频信号的存在和频率偏移的系统和方法。 该方法包括接收扩频无线电信号。 信号可被采样以形成多个信号采样。 每个信号样本可以乘以邻近信号样本的复共轭以形成多个信号样本对。 信号样本对可以在预定的停留时间周期内相加以形成具有幅度和角度偏移的数据矢量，以使得能够检测信号，并且使得扩频射频信号和接收机频率参考之间的频率偏移能够是 决心。

公开(公告)号：US07612711B1

公开(公告)日：2009-11-03

申请号：US12436311

申请日：2009-05-06

Applicant: William K. McIntire ,  Larry S. Thomson ,  David H. Robbins ,  James J. Boesch

Inventor： William K. McIntire ,  Larry S. Thomson ,  David H. Robbins ,  James J. Boesch

IPC: G01S13/00 ,  G01S1/00 ,  H04M1/00

CPC classification number: G01S7/006

Abstract: A method is disclosed for transmitting low data rate symbols from a communications terminal to a burst radar transceiver. A plurality of bursts can be emitted from a burst radar transceiver, each burst having a burst interval and separated by an inter-burst interval. A symbol can be transmitted from the communications terminal to the burst radar transceiver. The symbol has a symbol period that is substantially longer than a radar transceiver burst period comprising the burst interval and the inter-burst interval. Symbol energy can be accumulated during inter-burst intervals at the burst radar transceiver over a plurality of burst periods for approximately the symbol period.

Abstract translation: 公开了一种用于将低数据速率符号从通信终端传输到突发雷达收发器的方法。 可以从突发雷达收发器发射多个突发，每个突发具有突发间隔并且由突发间间隔隔开。 符号可以从通信终端发送到突发雷达收发器。 符号具有比包括突发间隔和突发间间隔的雷达收发器突发周期长的符号周期。 符号能量可以在脉冲串雷达收发器的脉冲间间隔期间在大约符号周期的多个脉冲串周期内累积。

公开(公告)号：US07602834B1

公开(公告)日：2009-10-13

申请号：US11540139

申请日：2006-09-28

Applicant: Thomas R. Giallorenzi ,  Johnny M. Harris ,  Dan M. Griffin ,  Sam Kingston

Inventor： Thomas R. Giallorenzi ,  Johnny M. Harris ,  Dan M. Griffin ,  Sam Kingston

IPC: H04B1/00

CPC classification number: H04B1/70752 ,  H04L2027/0065 ,  H04W24/00

Abstract: A system and method for determining a fine frequency offset of a composite code spread spectrum signal is disclosed. The method includes despreading at least one component of the composite spread spectrum signal to form a partially despread composite spread spectrum signal. A set of on-time samples are selected from the signal. The set of on-time samples are rotated by a predetermined frequency amount. The set of rotated samples are placed into a plurality of frequency bins, with each frequency bin representative of a different frequency estimate. An energy for the signal in each frequency bin is determined to find the bin having the greatest energy.

Abstract translation: 公开了一种用于确定复合码扩频信号的精细频率偏移的系统和方法。 该方法包括解扩复合扩频信号的至少一个分量以形成部分解扩复合扩频信号。 从信号中选择一组接通时间样本。 该一组接通时间样品旋转预定频率量。 旋转的样本集合被放置在多个频率仓中，每个频率块表示不同的频率估计。 确定每个频率仓中的信号的能量以找到具有最大能量的仓。

公开(公告)号：US07596113B1

公开(公告)日：2009-09-29

申请号：US11540138

申请日：2006-09-28

Applicant: Samuel C. Kingston ,  Thomas R. Giallorenzi ,  Johnny M. Harris

Inventor： Samuel C. Kingston ,  Thomas R. Giallorenzi ,  Johnny M. Harris

IPC: H04B7/216

CPC classification number: H04W56/003 ,  H04W56/006

Abstract: A technique for scheduling transmissions for a plurality of transmitters in a TDMA network is described. The technique includes assigning guard time between each pair of successive transmitters, where the guard time is related to the propagation delay between the pair of successive transmitters. Total guard time is minimized by selecting an order of transmission for the plurality of transmitters to minimize the total guard time.

Abstract translation: 描述了一种用于调度TDMA网络中的多个发射机的传输的技术。 该技术包括在每对连续发射机之间分配保护时间，其中保护时间与一对连续发射机之间的传播延迟有关。 通过选择多个发射机的传输顺序来最小化总保护时间，以最小化总保护时间。

公开(公告)号：US10404284B1

公开(公告)日：2019-09-03

申请号：US14805155

申请日：2015-07-21

Applicant: L-3 Communications Corp.

Inventor： David G. Landon ,  Ryan W. Hinton ,  Kelly D. Griffiths ,  Ayyoob D. Abbaszadeh

IPC: H03M13/23 ,  H03M13/09 ,  G06F11/10

Abstract: A permutation apparatus can receive a data block of ordered data elements in parallel data segments that are Pin number of data elements wide. The permutation apparatus can perform a parallel-to-parallel conversion and one or more reorder operations on the data elements and output the data block in parallel data segments that are Pout number of data elements wide and in which at least some of the data elements are reordered. The Pin-parallel-data segments can be clocked into the permutation apparatus on successive cycles of a clock, and the Pout-parallel-data segments can be clocked out of the permutation apparatus on cycles of the same clock.

公开(公告)号：US09405860B1

公开(公告)日：2016-08-02

申请号：US14204684

申请日：2014-03-11

Applicant: L-3 Communications Corp.

Inventor： Larry R. Trout

IPC: G06F17/30

CPC classification number: G06F17/30982

Abstract: A content addressable memory (CAM) system can include a comparator core in which all of the keys of the CAM are embedded in comparator blocks. A search key can be provided to each of the comparator blocks, which can compare the search key to its embedded key and determine whether the search key matches the embedded key. The comparator blocks can be organized into paged sets in the comparator core such that only one of the comparator blocks in each paged set is selected and compares its embedded key to the search key at any given time. The comparator block selected in each paged set can be incremented until the search key has been compared to the keys embedded in all of the comparator blocks of the comparator core.

Abstract translation: 内容可寻址存储器（CAM）系统可以包括比较器内核，其中CAM的所有键都嵌入在比较器块中。 可以向每个比较器块提供搜索关键字，其可以将搜索关键字与其嵌入的密钥进行比较，并确定搜索关键字是否匹配嵌入的密钥。 比较器块可以被组织成比较器内核中的寻呼组，使得每个分页组中只有一个比较器块被选择并且在任何给定时间将其嵌入的密钥与搜索关键字进行比较。 可以增加在每个分页组中选择的比较器块，直到将搜索关键字与嵌入在比较器核心的所有比较器块中的键进行比较。

公开(公告)号：US09344122B1

公开(公告)日：2016-05-17

申请号：US14465498

申请日：2014-08-21

Applicant: L-3 COMMUNICATIONS CORP.

Inventor： Osama S. Haddadin ,  Roy E. Prymek ,  William K. McIntire

IPC: H04B1/10 ,  H04B1/52 ,  H04B1/525 ,  H04B1/04 ,  H04L25/03

CPC classification number: H04B1/10 ,  H03F1/32 ,  H03F3/189 ,  H03F3/245 ,  H03F2200/294 ,  H04B1/0475 ,  H04B1/525 ,  H04B17/391 ,  H04L25/03019

Abstract: Adaptive filtering is used to substantially cancel distortion in radio frequency (RF) signals. Such adaptive filtering can be used in an RF transmitting module to pre-compensate an RF signal with compensation (inverse) distortion to cancel inherent transmission path distortion from the RF signal. Adaptive filtering can also be used in a multi-carrier RF receiving module to cancel from a given carrier signal distortion due to cross talk from adjacent carrier signals. Adaptive filtering in an RF transceiver can be used to cancel from a received RF signal distortion arising from leakage of a transmit signal into the receive path.

Abstract translation: 自适应滤波用于基本上消除射频（RF）信号中的失真。 这种自适应滤波可以用在RF发射模块中，以用补偿（反向）失真对RF信号进行预补偿，以消除来自RF信号的固有传输路径失真。 自适应滤波也可以用在多载波RF接收模块中，以从给定的载波信号中消除由于相邻载波信号的串扰引起的失真。 RF收发器中的自适应滤波可用于从发射信号泄漏到接收路径中的接收到的RF信号失真中消除。

公开(公告)号：US09240911B1

公开(公告)日：2016-01-19

申请号：US14268525

申请日：2014-05-02

Applicant: L-3 Communications Corp.

Inventor： Stephen A. Laraway ,  Anthony D. Smith ,  Dan M. Griffin ,  Jeffrey B. Bench ,  David G. Landon

IPC: H03K5/159 ,  H04L25/03 ,  H04L7/00 ,  H03H7/40 ,  H03H7/30

CPC classification number: H04L7/0087 ,  H04L25/0228 ,  H04L25/03114

Abstract: A digital communications receiver can comprise a digital filter that can be configured and later reconfigured multiple times as, for example, a matched filter, an equalizer, a matched filter and equalizer, or the like. For example, the digital filter can be initially configured as a matched filter for use with a correlation module to detect pilot symbols. Detected pilot symbols can be utilized to estimate characteristics of a channel from the distant transmitter to the receiver, and the estimated channel characteristics can be used to determine coefficients for an equalizer for reducing channel distortion in future transmissions received over the channel. The digital filter can then be configured as an equalizer or a matched filter and equalizer. If the later, the digital filter can both equalize incoming transmissions from the distant transmitter and, with a correlation module, identify any pilot symbols in the transmissions. Any detected pilot symbols can be utilized to determine again equalizer coefficients for equalizing transmissions received over the channel, and the digital filter can be updated accordingly.

Abstract translation: 数字通信接收机可以包括数字滤波器，该数字滤波器可被配置并且稍后重新配置多次，例如匹配滤波器，均衡器，匹配滤波器和均衡器等。 例如，数字滤波器可以被初始配置为匹配滤波器，以与相关模块一起使用以检测导频符号。 可以使用检测到的导频符号来估计从远方发射机到接收机的信道的特性，并且所估计的信道特性可用于确定均衡器的系数，以减少在该信道上接收的未来传输中的信道失真。 然后可以将数字滤波器配置为均衡器或匹配滤波器和均衡器。 如果稍后，数字滤波器可以均衡来自远方发射机的进入传输，并且通过相关模块识别传输中的任何导频符号。 可以利用任何检测到的导频符号来再次确定均衡器系数以均衡通过信道接收的传输，并且可以相应地更新数字滤波器。

公开(公告)号：US09191200B1

公开(公告)日：2015-11-17

申请号：US12900349

申请日：2010-10-07

Applicant: Michael D. Adams ,  Jared M. Jacobson

Inventor： Michael D. Adams ,  Jared M. Jacobson

IPC: H04L9/08 ,  H04L29/06 ,  G06F21/60 ,  H04W12/06 ,  H04W12/02

CPC classification number: H04W12/04 ,  G06F21/602 ,  G06F2221/2111 ,  H04L9/0822 ,  H04L9/085 ,  H04L9/0891 ,  H04L9/0897 ,  H04L63/0428 ,  H04L63/0861 ,  H04L63/105 ,  H04L63/18 ,  H04L2209/80 ,  H04L2463/062 ,  H04W12/02 ,  H04W12/06 ,  H04W84/06

Abstract: The security level of a communications terminal can be changed during operation. A key loading device can reconstitute a key encryption key from plural split portions. The split portions can be loaded into the key loading device via various interfaces. The reconstituted key encryption key can be used to unwrap wrapped keys stored in the key loading device.

Abstract translation: 通信终端的安全级别可以在操作期间改变。 密钥加载设备可以从多个分割部分重构密钥加密密钥。 分割部分可以通过各种接口装入钥匙装载装置。 重构的密钥加密密钥可用于解除存储在密钥加载设备中的包裹密钥。