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31. 发明授权

US07606257B2 Apparatus and method for transmission collision avoidance 有权
标题翻译：用于传输避免碰撞的装置和方法
公开(公告)号：US07606257B2
公开(公告)日：2009-10-20
申请号：US10760024
申请日：2004-01-15
申请人： Craig H. Barratt , William J. McFarland
发明人： Craig H. Barratt , William J. McFarland
IPC分类号： H04L12/413 , H04L12/43
CPC分类号： H04W74/0816 , H04W74/08 , H04W84/12
摘要： A method of minimizing collisions in a CSMA/CA wireless data communication system using an access point includes sensing the presence of a client desirous of communication with the access point. A start time slot list having at least one unique start time slot during which the client may begin transmitting can be allocated. The start time slot list to the client can be transmitted. A transmission from the client can be received, wherein such transmission begins only during the start time slot(s) indicated by the start time slot list. Notably, the start time slot list can include a high-priority start time slot and a low-priority start time slot substantially equally displaced in time from a center start time slot. A client capable of receiving the start time slot list can select between the high-priority start time slot and the low-priority start time slot based on a randomizing function.
摘要翻译：使用接入点的CSMA / CA无线数据通信系统中的冲突最小化的方法包括检测出希望与接入点进行通信的客户的存在。可以分配具有至少一个唯一的开始时隙的开始时隙列表，在该时间段期间客户端可以开始发送。可以发送客户端的开始时隙列表。可以接收来自客户端的传输，其中这种传输仅在由开始时隙列表指示的开始时隙期间开始。值得注意的是，开始时隙列表可以包括从中心开始时隙基本上等时移位的高优先级开始时隙和低优先级开始时隙。能够接收开始时隙列表的客户端可以基于随机化功能在高优先级开始时隙和低优先级开始时隙之间进行选择。

32. 发明授权

US07369510B1 Wireless LAN using RSSI and BER parameters for transmission rate adaptation 有权
标题翻译：无线局域网使用RSSI和BER参数进行传输速率适配
公开(公告)号：US07369510B1
公开(公告)日：2008-05-06
申请号：US10809287
申请日：2004-03-24
申请人： Michael S. Y. Wong , Jeffrey M. Gilbert , Craig H. Barratt
发明人： Michael S. Y. Wong , Jeffrey M. Gilbert , Craig H. Barratt
IPC分类号： H04L1/00
CPC分类号： H04L1/20 , H04L1/0002 , H04L1/16
摘要： Dynamic conditions present in a channel can quickly degrade signal quality, thereby reducing the data rate usable by a WLAN transmitter. For maximum throughput, the highest, reliable data rate available should be used. In accordance with one feature of an adaptive rate technique, a lookup RSSI from one or more acknowledgment packets can be determined. One or more valid data rates can then be determined, wherein a valid data rate has an RSSI threshold less than or equal to the lookup RSSI. An achievable throughput can be computed for each valid data rate based on a theoretical rate and a packet error rate (PER). The valid data rate having the highest achievable throughput can be chosen as the new transmission rate. A rate control table, which can include RSSI thresholds, UDP rates, and PERs for each supported data rate, can be updated based on actual transmission information.
摘要翻译：信道中存在的动态条件可能会迅速降低信号质量，从而降低WLAN发射机可用的数据速率。为了获得最大吞吐量，应使用最高可靠的数据速率。根据自适应速率技术的一个特征，可以确定来自一个或多个确认分组的查找RSSI。然后可以确定一个或多个有效数据速率，其中有效数据速率具有小于或等于查找RSSI的RSSI阈值。可以基于理论速率和分组错误率（PER）为每个有效数据速率计算可实现的吞吐量。可以选择具有最高可实现吞吐量的有效数据速率作为新的传输速率。可以基于实际的传输信息来更新可以包括每个支持的数据速率的RSSI阈值，UDP速率和PER的速率控制表。

33. 发明授权

US07336626B1 Operating time division duplex (TDD) wireless systems in paired spectrum (FDD) allocations 有权
标题翻译：配对频谱（FDD）分配中的操作时分双工（TDD）无线系统
公开(公告)号：US07336626B1
公开(公告)日：2008-02-26
申请号：US09967637
申请日：2001-09-28
申请人： Craig H. Barratt , Christopher R. Uhlik
发明人： Craig H. Barratt , Christopher R. Uhlik
IPC分类号： H04J1/16
CPC分类号： H04B7/12
摘要： A wireless communication system operates in a combined FDD and TDD mode. During a first time period, data may be transmitted at a first frequency band and received at a second frequency band. During a second time period, data is transmitted at the second frequency band and received at the first frequency band. The first and second time periods may be of identical durations, thereby creating a 50% duty cycle. When the base station operates with multiple frequency bands, spatial processing parameters such as the spatial signature or copy weights of the mobile stations may be collected in all frequency bands, thereby allowing the full processing advantage of adaptive antenna.
摘要翻译：无线通信系统以组合的FDD和TDD模式工作。在第一时间段期间，可以以第一频带发送数据并在第二频带接收数据。在第二时间段期间，在第二频带发送数据并在第一频带接收数据。第一和第二时间段可以具有相同的持续时间，从而产生50％的占空比。当基站以多个频带进行操作时，可以在所有频带中收集诸如移动站的空间签名或复制权重之类的空间处理参数，从而允许自适应天线的全部处理优势。

34. 发明授权

US07277679B1 Method and apparatus to provide multiple-mode spatial processing to a terminal unit 有权
标题翻译：向终端单元提供多模式空间处理的方法和装置
公开(公告)号：US07277679B1
公开(公告)日：2007-10-02
申请号：US10265896
申请日：2002-10-07
申请人： Craig H. Barratt , Athanasios A. Kasapi
发明人： Craig H. Barratt , Athanasios A. Kasapi
IPC分类号： B60H1/00
CPC分类号： H04B7/0877 , H04B7/084 , H04B7/0842 , H04B7/0851 , H04B7/0857 , H04B7/0868 , H04B7/0871 , H04B7/0874 , H04B7/088 , H04B17/24 , H04B17/309 , H04B17/318 , H04B17/336 , H04B17/345 , H04W52/42
摘要： Methods and apparatuses, including computer program products, for spatial processing in a remote terminal unit. One embodiment is a wireless remote terminal receiver in a wireless terminal unit for operation in a wireless communication system. The wireless remote terminal receiver includes an antenna array, and a receive processing unit to process signals received by the antenna array by applying a selected spatial processing mode of a plurality of spatial processing modes. The modes include one or more modes of one or more spatial processing methods. The receiver also includes a selector to select the spatial processing mode from the plurality of spatial processing modes. The selecting includes selecting the spatial processing method in the case that the set of spatial processing modes are of more than one spatial processing method.
摘要翻译：包括用于远程终端单元中的空间处理的计算机程序产品的方法和装置。一个实施例是用于在无线通信系统中操作的无线终端单元中的无线远程终端接收器。无线远程终端接收机包括天线阵列和接收处理单元，用于通过应用多个空间处理模式的所选择的空间处理模式来处理由天线阵列接收的信号。这些模式包括一种或多种空间处理方法的一种或多种模式。接收机还包括从多个空间处理模式中选择空间处理模式的选择器。所述选择包括在所述一组空间处理模式具有多于一种空间处理方法的情况下选择所述空间处理方法。

35. 发明授权

US06965788B1 Method and apparatus for providing spatial processing in a remote unit 有权
标题翻译：用于在远程单元中提供空间处理的方法和装置
公开(公告)号：US06965788B1
公开(公告)日：2005-11-15
申请号：US09967863
申请日：2001-09-28
申请人： Craig H. Barratt , David M. Parish , Stephen J. Sifferman
发明人： Craig H. Barratt , David M. Parish , Stephen J. Sifferman
IPC分类号： H04B7/08 , H04B7/10 , H04B7/26 , H04B1/04
CPC分类号： H04B7/0877 , H04B7/0848 , H04W52/0206 , H04W52/0245 , Y02D70/1222 , Y02D70/142 , Y02D70/22 , Y02D70/444
摘要： Methods and apparatus implementing spatial processing in a remote unit. In general, in one aspect, a remote unit in accordance with the invention includes a plurality of antennas and a spatial processing unit coupled to the plurality of antennas.
摘要翻译：在远程单元中实现空间处理的方法和装置。通常，在一个方面，根据本发明的远程单元包括耦合到多个天线的多个天线和空间处理单元。

36. 发明授权

US5592490A Spectrally efficient high capacity wireless communication systems 失效
标题翻译：光谱高效的大容量无线通信系统
公开(公告)号：US5592490A
公开(公告)日：1997-01-07
申请号：US375848
申请日：1995-01-20
申请人： Craig H. Barratt , David M. Parish , Richard H. Roy, III
发明人： Craig H. Barratt , David M. Parish , Richard H. Roy, III
IPC分类号： H04J15/00 , G01S5/12 , H01Q1/24 , H01Q3/26 , H04B7/04 , H04B7/06 , H04B7/08 , H04B7/24 , H04L5/00 , H04W16/28 , H04W64/00 , H04Q7/00
CPC分类号： H04W16/28 , H01Q1/246 , H01Q3/2605 , H01Q3/267 , H04B17/12 , H04B17/21 , H04B7/0408 , H04B7/0491 , H04B7/0615 , H04B7/0617 , H04B7/0697 , H04B7/0842 , H04B7/0845 , G01S5/12
摘要： A wireless system comprising a network of base stations for receiving uplink signals transmitted from a plurality of remote terminals and for transmitting downlink signals to the plurality of remote terminals using a plurality of conventional channels including a plurality of antenna elements at each base station for receiving uplink signals, a plurality of antenna elements at each base station for transmitting downlink signals, a signal processor at each base station connected to the receiving antenna elements and to the transmitting antenna elements for determining spatial signatures and multiplexing and demultiplexing functions for each remote terminal antenna for each conventional channel, and a multiple base station network controller for optimizing network performance, whereby communication between the base stations and a plurality of remote terminals in each of the conventional channels can occur simultaneously.
摘要翻译：一种无线系统，包括用于接收从多个远程终端发送的上行链路信号的基站网络，并且使用包括在每个基站处的多个天线元件的多个常规信道向多个远程终端发送下行链路信号，用于接收上行链路信号，每个基站处的多个天线元件用于发送下行链路信号，在连接到接收天线元件的每个基站处的信号处理器和用于确定每个远程终端天线的空间签名和复用和解复用功能的发射天线元件，每个常规信道和用于优化网络性能的多基站网络控制器，由此基站和每个常规信道中的多个远程终端之间的通信可以同时发生。

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