-
31.发明授权Methods and apparatus implementing short and long code channel overlay for fast acquistion of long PN codes in spread spectrum communications systems 有权实现短码和长码信道覆盖的方法和装置，用于在扩频通信系统中快速获取长PN码公开(公告)号：US07701996B1
公开(公告)日：2010-04-20
申请号：US11259336
申请日：2005-10-25
IPC分类号： H04B1/69
CPC分类号： H04B1/7075 , H04B2201/70715
摘要： The present invention concerns methods and apparatus for use in a spread spectrum communications system. In particular, in a method of the present invention information useful for acquiring a target signal is selected; the information is incorporated in an acquisition signal; the acquisition signal is transmitted; the target signal is spread with a spreading code; and the target signal is transmitted. At a receiving node, the acquisition information useful for acquiring the target signal is recovered from the acquisition signal and used to acquire the target signal. Apparatus in accordance with the present invention implement methods of the present invention. The methods and apparatus of the present invention can be used in node- and network-discovery situations.
摘要翻译： 本发明涉及在扩频通信系统中使用的方法和装置。 特别地，在本发明的方法中，选择用于获取目标信号的信息; 信息被并入采集信号中; 发送采集信号; 目标信号用扩展码扩展; 并发送目标信号。 在接收节点，从采集信号中恢复获取目标信号有用的获取信息，并用于获取目标信号。 根据本发明的装置实现本发明的方法。 本发明的方法和装置可用于节点和网络发现情况。
-
公开(公告)号：US07861298B1
公开(公告)日：2010-12-28
申请号：US11529791
申请日：2006-09-28
IPC分类号： G06F21/00
CPC分类号： H04L63/1458 , H04B1/708 , H04B1/7105 , H04L1/0045 , H04L1/0072
摘要： A system and method is disclosed for protecting a receiver configured to receive a plurality of contemporaneous spread spectrum signal bursts from a denial of service attack. The method includes the operation of detecting a burst transmission that includes a random burst number. The burst transmission can be analyzed to determine a denial of service statistic based on the random burst number. The burst transmission is processed when the denial of service statistic is within a predetermined threshold.
摘要翻译： 公开了一种用于保护被配置为从拒绝服务攻击接收多个同时代的扩展频谱信号突发的接收机的系统和方法。 该方法包括检测包括随机突发数的突发传输的操作。 可以分析突发传输以基于随机突发数来确定拒绝服务统计。 当拒绝服务统计量在预定阈值内时，处理突发传输。
-
33.发明授权Bandwidth allocation and data multiplexing scheme for direct sequence CDMA systems 失效直接序列CDMA系统的带宽分配和数据复用方案公开(公告)号：US07054286B2
公开(公告)日：2006-05-30
申请号：US09829092
申请日：2001-04-09
申请人： Richard B. Ertel , Eric K. Hall , Thomas R. Giallorenzi , Philip L. Stephenson , Johnny M. Harris , Edward P. Newren
发明人： Richard B. Ertel , Eric K. Hall , Thomas R. Giallorenzi , Philip L. Stephenson , Johnny M. Harris , Edward P. Newren
IPC分类号： H04Q7/00
CPC分类号： H04J13/16 , H04W72/044 , H04W72/0453 , H04W72/0466
摘要： This invention provides a highly flexible multiplexing scheme for Direct Sequence CDMA systems enabling the CDMA system to flexibly allocate CDMA channel resources between packet-switched broadcast channels and fast-circuit-switched dedicated channels in order to optimize system throughput. A method and system are provided for operating a communication system. The method has steps of: flexibly allocating CDMA channel resources between packet-switched broadcast channels and fast-circuit-switched dedicated channels in order to optimize system throughput, and employing a side channel as required to send all or a part of a total amount of data, depending on the total amount of the data. A bandwidth allocation scheme allocates a set of CDMA channels for burst packet-switched channels, and data is time division multiplexed over the set of burst CDMA channels providing a wide bandwidth data pipe for packet-switched data. Subscriber stations are equipped with multiple CDMA channel receivers tuned to the burst CDMA channels.
摘要翻译： 本发明为直接序列CDMA系统提供了高度灵活的复用方案，使得CDMA系统能够在分组交换广播信道和快速电路交换专用信道之间灵活地分配CDMA信道资源，以优化系统吞吐量。 提供了一种操作通信系统的方法和系统。 该方法具有以下步骤：在分组交换广播信道和快速电路交换专用信道之间灵活地分配CDMA信道资源，以便优化系统吞吐量，并且根据需要采用侧信道来发送全部或部分总数 数据，取决于数据的总量。 带宽分配方案为突发分组交换信道分配一组CDMA信道，并且通过提供用于分组交换数据的宽带宽数据管道的突发CDMA信道集合对数据进行时分复用。 用户站配备有被调谐到突发CDMA信道的多个CDMA信道接收机。
-
公开(公告)号：US06999446B2
公开(公告)日：2006-02-14
申请号：US10039514
申请日：2001-10-26
申请人： Eric K. Hall , Thomas R. Giallorenzi , Richard B. Ertel , Lee A. Butterfield , Dan M. Griffin , Philip L. Stephenson
发明人： Eric K. Hall , Thomas R. Giallorenzi , Richard B. Ertel , Lee A. Butterfield , Dan M. Griffin , Philip L. Stephenson
IPC分类号： H04J3/24
CPC分类号： H04W16/12 , H01Q1/246 , H01Q21/205 , H04B1/707 , H04B2201/70701 , H04B2201/70703 , H04B2201/709709 , H04J13/0074 , H04L1/0003 , H04L1/0009 , H04W16/02
摘要： A method is disclosed for operating a wireless communications system, such as a DS-CDMA communications system, by transmitting a waveform that includes a plurality of repeating frames each having x header training base symbols in a header training symbol field (TH) and y tail training base symbols in a tail training symbol field (TT). The frame is received and functions as one of a plurality of different types of frames depending on the content of at least TT. In the preferred embodiment the frame functions as one of a normal traffic frame, a termination frame, or a legacy frame providing backwards compatibility with another waveform. A given one of the frames includes four equal-size data fields separated by three equal-sized control fields, the header training symbol field (TH) and the tail training symbol field (TT).
-
35.发明授权S-CDMA fixed wireless loop system employing subscriber unit/radio base unit super-frame alignment 失效采用用户单元/无线电基站单元超帧对准的S-CDMA固定无线环路系统
公开(公告)号：US6011788A
公开(公告)日：2000-01-04
申请号：US987815
申请日：1997-12-10
申请人： Michael Hurst , Johnny Harris , Dan M. Griffin , Lee Butterfield , Thomas R. Giallorenzi , Kyle L. Henderson
发明人： Michael Hurst , Johnny Harris , Dan M. Griffin , Lee Butterfield , Thomas R. Giallorenzi , Kyle L. Henderson
CPC分类号： H04W56/0015
摘要： A method is disclosed for operating a synchronous Code Division Multiple Access (S-CDMA) radio frequency communication system having a host transceiver unit and a plurality of user transceiver units. The method includes an initial step of defining a super-frame to be comprised of N sequential frames of data. In the preferred embodiment N is equal to three. For a user transceiver unit that obtains access to the host transceiver unit a next step of the method receives frames of data transmitted by the host transceiver unit and initially aligns a receiver timing and a transmitter timing of the user transceiver unit to a super-frame boundary of the received frames. A next step transmits frames of data from the user transceiver unit to the host transceiver unit using the initial timing alignment. A further step of the method detects at the host transceiver unit a difference between the arrival of the transmitted frames of data and a super-frame boundary and then transmits a timing correction parameter, preferably expressed in symbols, from the host transceiver unit to the user transceiver unit in order to align the transmitted frames of data to the super-frame boundary.
摘要翻译： 公开了一种用于操作具有主机收发器单元和多个用户收发器单元的同步码分多址（S-CDMA）射频通信系统的方法。 该方法包括定义由N个连续数据帧组成的超帧的初始步骤。 在优选实施例中，N等于3。 对于获得对主收发器单元的访问的用户收发器单元，该方法的下一步骤接收主机收发器单元发送的数据帧，并且最初将用户收发器单元的接收机定时和发送器定时对齐到超帧边界 的接收帧。 下一步骤将使用初始定时对准将数据帧从用户收发器单元发送到主机收发器单元。 该方法的另一步骤在主机收发器单元处检测所发送的数据帧的到达与超帧边界之间的差异，然后将来自主收发器单元的优选地以符号表示的定时校正参数发送到用户 收发器单元，以便将发送的数据帧对齐到超帧边界。
-
36.发明授权Efficient circular clipping implementation using simplified CORDIC rotators 有权使用简化的CORDIC旋转器实现高效的圆截距实现公开(公告)号：US07545878B1
公开(公告)日：2009-06-09
申请号：US10608374
申请日：2003-06-26
IPC分类号： H04B15/00
CPC分类号： G06F7/4818
摘要： A system for the efficient use of CORDIC rotators is provided. The system includes at least one first rotator operating in vector mode and includes a sign storage buffer. The system also includes at least one bit inverter coupled between the first rotator and a second rotator, the second rotator operating in rotation mode.
摘要翻译： 提供了一种有效利用CORDIC转子的系统。 该系统包括至少一个以向量模式操作的第一旋转器，并且包括符号存储缓冲器。 该系统还包括耦合在第一旋转器和第二旋转器之间的至少一个位逆变器，第二旋转器以旋转模式操作。
-
37.发明授权Two-dimensional channel bonding in a hybrid CDMA/FDMA fixed wireless access system to provide finely variable rate channels 失效混合CDMA / FDMA固定无线接入系统中的二维信道绑定，以提供精细可变速率信道公开(公告)号：US07190683B2
公开(公告)日：2007-03-13
申请号：US09829360
申请日：2001-04-09
申请人： Thomas R. Giallorenzi , Eric K. Hall , Richard B. Ertel , Philip L. Stephenson , Dan M. Griffin , Lee A. Butterfield
发明人： Thomas R. Giallorenzi , Eric K. Hall , Richard B. Ertel , Philip L. Stephenson , Dan M. Griffin , Lee A. Butterfield
CPC分类号： H04B7/2634 , H04B7/2621
摘要： A communications system employs the use of both synchronous CDMA and FDMA to provide a variable bandwidth waveform with multiple bonded transmitters and receivers that are agile in both frequency and PN code to permit a variable bandwidth and variable rate multiple access system. In a first aspect the teachings provide the use of both CDMA and FDMA together to enable an improved concentration efficiency by making a larger pool of bandwidth available to each user. In a second aspect these teachings enable channel bonding across both code space and frequency space, thus making the system capable of operating within a variable (not necessarily contiguous) bandwidth and at a finely variable rate.
摘要翻译： 通信系统采用同步CDMA和FDMA两者来提供具有灵活的频率和PN码的多个绑定发射机和接收机的可变带宽波形，以允许可变带宽和可变速率多址接入系统。 在第一方面，该教导提供了CDMA和FDMA两者的使用，以通过使更大的带宽池可用于每个用户来实现改进的集中效率。 在第二方面，这些教导使得能够跨代码空间和频率空间进行通道绑定，从而使系统能够在可变（不一定是连续的）带宽内以可变速率运行。
-
38.发明授权公开(公告)号：US08358967B1
公开(公告)日：2013-01-22
申请号：US12325942
申请日：2008-12-01
IPC分类号： H04B7/15
CPC分类号： H04B7/18506 , H04B7/18504
摘要： The present invention relates to a towed wireless network communications subsystem for use in flight by a towing aircraft. The towed wireless network communications subsystem includes an aerodynamic enclosure having a tether attachment and configured to be towed by the towing aircraft. A directional antenna is disposed on the aerodynamic enclosure and is capable of forming one or more directional communications beams within a wireless network. A communications device is disposed in the aerodynamic enclosure and is coupled to the directional antenna(s). The communications device is configured to relay communications data between the towing aircraft and the wireless network.
摘要翻译： 牵引无线网络通信子系统技术领域本发明涉及一种由牵引飞机在飞行中使用的拖曳无线网络通信子系统。 牵引的无线网络通信子系统包括具有系绳附件并被构造成被牵引飞机牵引的空气动力学外壳。 定向天线设置在空气动力学外壳上，并且能够在无线网络内形成一个或多个定向通信波束。 通信设备设置在空气动力学外壳中并且耦合到定向天线。 通信设备被配置为中继牵引飞行器和无线网络之间的通信数据。
-
39.发明授权Method and apparatus for FDD and TDD terminal entry into a wireless communication network 有权用于FDD和TDD终端进入无线通信网络的方法和装置公开(公告)号：US07962161B1
公开(公告)日：2011-06-14
申请号：US11986578
申请日：2007-11-21
IPC分类号： H04W88/02
摘要： Entry of a terminal into a wireless communications network is facilitated for terminals which may operate in either frequency-division duplex or time-division duplex mode. Join request messages transmitted by the terminals include a duplex capability indicator defining a carrier frequency which can be used to response to the terminals.
摘要翻译： 对于可以在频分双工或时分双工模式下操作的终端，便于对终端进入无线通信网络。 由终端发送的加入请求消息包括定义可用于响应于终端的载波频率的双工能力指示符。
-
公开(公告)号：US07944351B1
公开(公告)日：2011-05-17
申请号：US12350096
申请日：2009-01-07
IPC分类号： G08B1/08
CPC分类号： G08B25/016 , G08B25/014 , G08B29/28
摘要： An emergency locating system can include emergency transceivers and rescue transceivers. The emergency transceivers can be capable of repeat transmission of a distress message using a variable power level and variable spreading factor. A receive transceiver can be capable of receiving the distress messages and sending a confirmation message to the emergency transceiver. The emergency transceiver can be capable of receiving the confirmation message and terminating transmission of the distress message.
摘要翻译： 紧急定位系统可以包括应急收发器和救援收发器。 应急收发器能够使用可变功率电平和可变扩频因子重复发送遇险消息。 接收收发器能够接收遇险消息并向紧急收发机发送确认消息。 应急收发器能够接收确认消息并终止遇险消息的传输。
-
-
-
-
-
-
-
-
-
搜索结果
61 条记录 (耗时 0.038 秒)
