-
1.发明授权Method and device for mitigation of multi-user interference in code division multiple access 有权用于在码分多址中减轻多用户干扰的方法和装置公开(公告)号：US08493953B1
公开(公告)日：2013-07-23
申请号：US11354355
申请日：2006-02-14
CPC分类号： H04B1/7107
摘要： A method and apparatus for mitigating multi-user interference in reception of a code division multiple access (CDMA) signal is described. The CDMA signal has a plurality of spread user symbol streams, each spread by a corresponding one of a plurality of spreading codes. Estimated symbols are iteratively improved by forming a reconstructed signal from the estimated symbols, subtracting the reconstructed signal from the CDMA signal to create a difference signal, and adjusting the estimated symbols based on a combination of the difference signal and the estimated symbols.
摘要翻译： 描述了用于在接收码分多址（CDMA）信号时减轻多用户干扰的方法和装置。 CDMA信号具有多个扩展的用户符号流，每个扩展用户符号流由多个扩展码中的相应一个扩展。 通过从估计的符号形成重建的信号，从CDMA信号中减去重建的信号以产生差分信号，并且基于差分信号和估计的符号的组合来调整估计的符号，迭代地改善估计符号。
-
公开(公告)号：US07054292B2
公开(公告)日：2006-05-30
申请号：US09833720
申请日：2001-04-12
IPC分类号： H04B7/216
CPC分类号： H04W16/12 , H01Q1/246 , H01Q21/205 , H04B1/707 , H04B2201/70703 , H04B2201/709709 , H04J13/0074 , H04L1/0003 , H04L1/0009 , H04W16/02
摘要： A method is disclosed for operating a synchronous space division multiple access, code division multiple access communications system. The method includes steps of, within a coverage area of a base station (BS), (a) assigning the same spreading code to a plurality of subscriber stations (SSs); and (b) beamforming using an antenna array at the BS so as to maximize the signal to interference plus noise ratio for a signal transmitted from a desired SS, The beamforming operates to steer a null towards another same-code SS to minimize interference from the same-code SS. Assuming that the antenna array has M-elements (M>1), then individual ones of P orthogonal spreading codes can be reused αM times within the coverage area, where 1/M
-
公开(公告)号：US07768990B1
公开(公告)日：2010-08-03
申请号：US11351363
申请日：2006-02-09
IPC分类号： H04J3/00
CPC分类号： H04L25/03331 , H04B1/7077 , H04B1/71072 , H04L2025/03611
摘要： A method for acquiring signals received from multiple users in a single burst groups signals by power and sequentially processes the signal groups. A received sum of a plurality of user signals received in a burst is stored, and the transmitted symbols for each signal within a first group of the stored signals is estimated. A modified set of signals is then determined that excludes the signals of the first group. From the modified set of signals, the method continues by canceling multiuser interference among signals within a second group, and estimating transmitted symbols for each signal within the second group. The first and second groups includes all signals within a power band that defines the group, and the first band represents a higher power band than the second. Such iterative processing may continue for sequentially lower power bands until all signals are processed. A receiver is also detailed.
摘要翻译： 一种用于在单个脉冲串中获取从多个用户接收的信号的方法，用于通过功率获取信号并且顺序处理信号组。 存储在突发中接收的多个用户信号的接收和，并且估计所存储信号的第一组内的每个信号的发送符号。 然后确定排除第一组信号的经修改的一组信号。 根据修改的信号集合，该方法继续通过消除第二组内的信号之间的多用户干扰，并且估计第二组内的每个信号的传输符号。 第一组和第二组包括限定组的功率带内的所有信号，第一频带表示比第二频带更高的功率频带。 这种迭代处理可以持续下一个较低的功率带，直到所有信号被处理。 接收器也是详细的。
-
4.发明授权Non-coherent multiuser receiver and method for aiding carrier acquisition in a spread spectrum system 有权非相干多用户接收机和用于辅助扩频系统中载波采集的方法公开(公告)号：US07701999B1
公开(公告)日：2010-04-20
申请号：US11416656
申请日：2006-05-02
IPC分类号： H04B1/00
CPC分类号： H04B1/7103 , H04L27/0014 , H04L27/2334 , H04L2027/0038 , H04L2027/0061 , H04L2027/0095
摘要： Disclosed is a method for acquiring a user signal from among several received from multiple users in a single burst. The method includes receiving a plurality of user signals in a single transmission burst, suppressing multiuser interference among at least some of the plurality of received signals, and determining a carrier frequency of at least one signal from among the interference suppressed plurality of received signals. Said signals may rotate due to a lack of synchronization while being equalized. Also described is a multiuser receiver for acquiring at least one user signal from among several user signals received from multiple users in a single burst. An antenna is for receiving a plurality of user signals in a single spread spectrum transmission burst, a matched filter is for despreading the signals, a multiuser equalizer is for suppressing mutual interference among at least a portion of the plurality of user signals, and a carrier lock circuit is for determining a carrier frequency of at least one user signal of the portion.
摘要翻译： 公开了一种用于从单个突发中从多个用户接收的几个中获取用户信号的方法。 所述方法包括以单个传输脉冲串接收多个用户信号，抑制所述多个接收信号中的至少一个中的多用户干扰，以及从干扰抑制的多个接收信号中确定至少一个信号的载波频率。 所述信号由于在均衡时缺少同步而旋转。 还描述了一种多用户接收器，用于从单个突发中从多个用户接收的几个用户信号中获取至少一个用户信号。 天线用于在单个扩展频谱传输脉冲串中接收多个用户信号，匹配滤波器用于解扩信号，多用户均衡器用于抑制多个用户信号的至少一部分与载波之间的相互干扰 锁定电路用于确定该部分的至少一个用户信号的载波频率。
-
5.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。
-
6.发明授权公开(公告)号：US08073084B1
公开(公告)日：2011-12-06
申请号：US12691578
申请日：2010-01-21
IPC分类号： H03D1/00
CPC分类号： H04B1/7093 , H04B1/7075
摘要： An apparatus and method for correlating a signal over a correlation interval while accommodating spreading code frequency offset is described. In one embodiment, the apparatus includes a plurality of correlators, where each correlator forms a correlation result corresponding to a unique code frequency offset hypothesis. Each correlator selects samples from a tapped delay line at a tap position moved along the delay line at a rate corresponding to the correlator unique code frequency offset hypothesis.
摘要翻译： 描述了一种用于在适应扩展码频率偏移的同时在相关间隔上相关信号的装置和方法。 在一个实施例中，该装置包括多个相关器，其中每个相关器形成对应于唯一代码频率偏移假设的相关结果。 每个相关器以对应于相关器唯一代码频率偏移假设的速率沿着延迟线移动的抽头位置处的抽头延迟线选择样本。
-
7.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。
-
公开(公告)号：US07558238B1
公开(公告)日：2009-07-07
申请号：US11335439
申请日：2006-01-18
IPC分类号： H04B7/216
CPC分类号： H04B7/2615 , H04B7/2618 , H04W74/02
摘要： A method for partitioning communication resource among multiple users partitions a portion of an available communication resource into a series of time-frequency slots, and allows multiple users to transmit in one of at least two available modes within a time-frequency slot. Preferably, one mode is time division of the time-frequency slot into time sub-slots, and another mode is code division of the time-frequency slot according to different spreading codes that spread an individual user's signal only within the subject time-frequency slot. Further details as to pilot signals, guard intervals, and payloads are described.
摘要翻译： 一种用于在多个用户中分配通信资源的方法将可用通信资源的一部分划分成一系列时隙，并且允许多个用户以时隙内的至少两种可用模式之一进行发送。 优选地，一种模式是时间 - 时隙到时间子时隙的时分，另一种模式是根据不同的扩展码对时间 - 时隙进行码分割，这些扩展码仅在主体时隙内扩展单个用户的信号 。 对导频信号，保护间隔和有效负载的进一步细节进行了说明。
-
10.发明授权Adaptive power amplifier linearization in time division duplex communication systems 有权时分双工通信系统中的自适应功率放大器线性化公开(公告)号：US07529524B1
公开(公告)日：2009-05-05
申请号：US11259850
申请日：2005-10-26
IPC分类号： H04B1/04
CPC分类号： H03F1/3247 , H03F1/34 , H03F3/24 , H03F2200/204 , H03F2200/207 , H04B2001/0433
摘要： In an aspect of the invention, a method is performed in a transceiver for adaptive power amplifier linearization in time division duplex communication systems. The method comprises, in response to a first condition, performing, using a feedback signal generated by receiving subsystem circuitry, adaptive power amplifier linearization on a signal to be transmitted. The method additionally comprises, in response to a second condition, performing operations in order to determine receive data from a received radio frequency (RF) signal. The operations use at least the receiving subsystem circuitry. In a further aspect of the present invention, a transceiver is disclosed.
摘要翻译： 在本发明的一个方面，在用于时分双工通信系统中的自适应功率放大器线性化的收发器中执行一种方法。 该方法包括响应于第一条件，使用由接收子系统电路产生的反馈信号，对要发送的信号进行自适应功率放大器线性化。 该方法还包括响应于第二条件执行操作以便从接收到的射频（RF）信号确定接收数据。 该操作至少使用接收子系统电路。 在本发明的另一方面，公开了一种收发器。
-
-
-
-
-
-
-
-
-
搜索结果
61 条记录 (耗时 0.021 秒)
