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公开(公告)号：US07280853B2
公开(公告)日：2007-10-09
申请号：US11012814
申请日：2004-12-15
IPC分类号： H04B1/38
CPC分类号： H04W52/0283 , Y02D70/142 , Y02D70/144 , Y02D70/22
摘要： A network node selects a “sleep” level based on its current or projected battery capacity. In an embodiment of the invention, sleep levels define the types of communication to which the node in question will be a party. The node in question communicates its selected sleep level to the rest of the network so that the other network nodes can communicate accordingly with the node.
摘要翻译： 网络节点根据其当前或预计的电池容量来选择“睡眠”电平。 在本发明的一个实施例中，睡眠级别定义所讨论的节点将成为一方的通信类型。 所讨论的节点将其选择的睡眠级别通信到网络的其余部分，使得其他网络节点可以相应地与节点通信。
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公开(公告)号：US06493322B1
公开(公告)日：2002-12-10
申请号：US08840268
申请日：1997-04-14
IPC分类号： H04J314
CPC分类号： H04B7/18534
摘要： A diversity scheme for allowing a transmitter/receiver, such as a mobile unit in a mobile telecommunications system, to exchange communication signals with more than one control station, such as a base station or satellite. According to an exemplary embodiment of the diversity scheme, the mobile unit scans for the control channel of a second satellite during idle time slots while communicating with a first satellite during active time slots. Once the mobile unit detects a control channel from a second satellite, the mobile unit stores synchronization information and establishes a communication link with the second satellite if shadowing or other severe fading causes signal quality over a communication link established with a first satellite to fall below a threshold level. The diversity scheme also allows the mobile unit to communicate simultaneously with two satellites, using alternate TDMA frames.
摘要翻译： 用于允许诸如移动电信系统中的移动单元的发射机/接收机与诸如基站或卫星的多于一个控制站交换通信信号的分集方案。 根据分集方案的示例性实施例，移动单元在空闲时隙期间扫描第二卫星的控制信道，同时在活动时隙期间与第一卫星通信。 一旦移动单元检测到来自第二卫星的控制信道，则移动单元存储同步信息并与第二卫星建立通信链路，如果阴影或其他严重衰落导致通过与第一卫星建立的通信链路的信号质量降至低于 门限等级。 分集方案还允许移动单元使用备用TDMA帧同时与两颗卫星通信。
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83.发明授权
公开(公告)号：US6031826A
公开(公告)日：2000-02-29
申请号：US697598
申请日：1996-08-27
申请人： Amer A. Hassan
发明人： Amer A. Hassan
CPC分类号： H04B7/18539 , H04L1/0072 , H04L1/0079 , H04L1/0083 , H04W84/06
摘要： A method and system for transmitting control information, such as Fast Associated Control Channel (FACCH) information in a digital TDMA communication system. Control information, when required, is transmitted over every other TDMA frame, and speech and data are transmitted over the remaining TDMA frames. Coding protection is reduced during transmission of the control information.
摘要翻译： 一种用于在数字TDMA通信系统中发送诸如快速关联控制信道（FACCH）信息的控制信息的方法和系统。 当需要时，通过每隔一个TDMA帧发送控制信息，并且通过剩余的TDMA帧发送语音和数据。 传输控制信息时编码保护减少。
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公开(公告)号：US5812968A
公开(公告)日：1998-09-22
申请号：US705885
申请日：1996-08-28
CPC分类号： H04L1/0014 , H04B7/18532 , H04B7/18534 , H04J3/1688 , H04B7/18513 , H04L1/0025
摘要： An apparatus for improving the link margin of a communication link includes a variable rate vocoder which decreases the output bit stream rate it produces so as to reduce the amount of information having to be transmit in the communication link. In one embodiment, the variable rate vocoder includes a plurality of vocoder portions, each of which produces a different bit stream rate. The selector is used for selecting among the output bit streams produced by each vocoder. In another embodiment, a logic device is coupled to the output of the vocoder. The logic device, upon receipt of a control signal, truncates the less important bits. The method for improving link margin includes reducing the vocoder output rate thereby reducing the amount of data being transmit in an communication link. The method also includes using increased error correction coding and transmitting at increased per bit power levels to increase link margin. A device knows to increase the link margin whenever it receives a request to do so, which request is based upon poor signal quality.
摘要翻译： 用于改善通信链路的链路余量的装置包括可变速率声码器，其减小其产生的输出比特流速率，以便减少在通信链路中必须发送的信息量。 在一个实施例中，可变速率声码器包括多个声码器部分，每个声码器部分产生不同的比特流速率。 选择器用于在由每个声码器产生的输出比特流之间进行选择。 在另一个实施例中，逻辑设备耦合到声码器的输出端。 在接收到控制信号时，逻辑设备截断不太重要的位。 用于改善链路余量的方法包括降低声码器输出速率，从而减少在通信链路中传输的数据量。 该方法还包括使用增加的纠错编码和以增加的每位功率电平进行发送以增加链路余量。 一个设备知道如果接收到这样做的请求增加链路容限，哪个请求是基于较差的信号质量的。
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公开(公告)号：US5809043A
公开(公告)日：1998-09-15
申请号：US727736
申请日：1996-10-08
申请人： Amer A. Hassan , Ali S. Khayrallah , Harro Osthoff
发明人： Amer A. Hassan , Ali S. Khayrallah , Harro Osthoff
CPC分类号： H03M13/3944 , H03M13/05 , H03M13/3707 , H03M13/3723 , H03M13/6325
摘要： A decoding system processes a received vector r to produce a soft symbol information vector output s including a reliability value for each received code symbol. From the reliability values, clusters of symbols within the received vector r having low reliability are identified and detected. Responsive thereto, the received vector r is permuted to scatter the low reliability symbols within each detected low reliability cluster throughout a given codeword. A decoding generator matrix G is also correspondingly permuted is response to the detection of low reliability clusters of symbols. Utilizing a trellis obtained from the permuted decoding generator matrix G', the permuted received vector r' is then sequentially or otherwise suboptimally decoded.
摘要翻译： 解码系统处理接收的矢量r以产生包括每个接收的码元的可靠性值的软符号信息矢量输出s。 从可靠性值中，识别并检测具有低可靠性的接收矢量r内的符号簇。 响应于此，接收的向量r被置换以在每个检测到的低可靠性集群内的整个给定码字中散布低可靠性符号。 解码产生器矩阵G也被相应地置换为对低可靠性符号簇的检测的响应。 利用从置换的解码产生器矩阵G'获得的网格，然后顺序地或以其它方式被次优解码的置换的接收向量r'。
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公开(公告)号：US5563906A
公开(公告)日：1996-10-08
申请号：US407560
申请日：1995-03-20
CPC分类号： H04B1/69
摘要： The present invention provides a novel Geometric Harmonic Modulation (GHM) method. The GHM method functions in two modes, a preamble mode and a traffic mode. During the preamble mode, n+1 frequencies are each offset by a predetermined phase in a transmit unit and passed through a channel to a receive unit. The set of phases is used as the spreading code in the transmit unit, and also acts as an `address` of intended receive units. The receive unit monitors preamble signals to determine the phases. When it recognizes a set of phases, or `address`, which pertains to itself, the receive unit stores the phases and uses these phases to despread and decode the appended message. After the preamble mode is finished, the GHM modulator enters the traffic mode and requests the message to be transmitted from the message source. A traffic carrier waveform is created by multiplying tones, each having its specific phase. An analog or binary message is encoded by modulating the traffic carder waveform. The receive unit detects a preamble carrier and recovers the particular preamble phases to be used as the despreading `key`. The receive unit then employs the phases in despreading the received signal to recover the transmitted binary message.
摘要翻译： 本发明提供了一种新颖的几何谐波调制（GHM）方法。 GHM方法在两种模式中起作用，即前导码模式和流量模式。 在前导码模式期间，n + 1个频率各自在发送单元中被预定的相位偏移并且通过信道被传送到接收单元。 该组相位被用作发送单元中的扩展码，并且还用作预期接收单元的“地址”。 接收单元监视前置信号以确定相位。 当它识别与本身相关的一组相位或“地址”时，接收单元存储相位并使用这些相位对所附加的消息进行解扩和解码。 在前导码模式完成之后，GHM调制器进入业务模式，并请求消息从消息源发送。 通过乘以每个具有其特定相位的音调来创建交通载波波形。 模拟或二进制消息通过调制业务量卡波形进行编码。 接收单元检测前同步码载波并恢复要用作解扩“密钥”的特定前同步码相位。 然后，接收单元采用解扩接收信号的相位来恢复发送的二进制消息。
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公开(公告)号：US5166953A
公开(公告)日：1992-11-24
申请号：US605714
申请日：1990-10-30
IPC分类号： H04B1/7136 , H04B1/715 , H04K3/00
CPC分类号： H04B1/7136 , H04B1/715 , H04K3/25 , H04K3/827 , H04B2001/71362 , H04B2001/7152
摘要： A countermeasure to a partial-band follower jammer for frequency hopping spread spectrum communication systems employs an M-ary orthogonal frequency shift keyed (FSK) signaling system having q frequency channels available for hopping. During each signaling interval, the transmitter and receiver operate in either a conventional or unconventional mode. The conventional mode is selected by the transmitter and the receiver with a pseudorandom probability p.sub.c. In this mode, the transmitter transmits one of r tones within the corresponding hop (i.e., within one of q channels), and log.sub.2 r information bits are conveyed, while the receiver comprises a dehopper followed by noncoherent matched filters. The unconventional mode is selected with probability 1-p.sub.c. In this mode, the transmitter randomly chooses one of the r tones and transmits it in one of r channels within each hop, where the r channels are selected pseudorandomly. In the unconventional mode, log.sub.2 r information bits are transmitted and the receiver comprises a bank of r radiometers.
摘要翻译： 用于跳频扩频通信系统的部分带跟随器干扰器的对策采用具有可用于跳频的q个频率信道的M进制正交频移键控（FSK）信令系统。 在每个信令间隔期间，发射机和接收机以常规或非常规模式工作。 常规模式由具有伪随机概率pc的发射机和接收机选择。 在该模式中，发射机在对应的跳频（即，在q个信道之一内）之间发送r个音调中的一个，并且传送log2r信息比特，而接收机包括后卫非相干匹配滤波器。 非常规模式以概率1-pc选择。 在这种模式下，发射机随机选择一个r个音调，并在每个跳频中的一个r个信道中发送，其中r个信道被伪随机地选择。 在非常规模式下，发送log2r信息位，并且接收器包括一组r辐射计。
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公开(公告)号：US10231283B2
公开(公告)日：2019-03-12
申请号：US13047583
申请日：2011-03-14
申请人： Henrique Filgueiras , Mukund Sankaranarayan , Amer A. Hassan , Mitesh K. Desai , Mahmoud S. Elhaddad
发明人： Henrique Filgueiras , Mukund Sankaranarayan , Amer A. Hassan , Mitesh K. Desai , Mahmoud S. Elhaddad
摘要： A computing device that forms a group in accordance with a peer-to-peer protocol in which a device may be identified based on a credential of a user. The credential may be used to determine a unique identifier for the user such that the same identifier is used on any device operated by the same user. Such an identifier may be used in connection with a peer-to-peer protocol that supports persistent peer-to-peer groups. As a result, the unique identifier for the user may be retained by remote devices that have paired with any device operated by a particular user such that those remote devices may automatically establish a connection with any other device operated by the same user that similarly uses the same unique identifier for the user.
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公开(公告)号：US09762662B2
公开(公告)日：2017-09-12
申请号：US13106638
申请日：2011-05-12
IPC分类号： G06F15/173 , H04L29/08
CPC分类号： H04L67/104
摘要： A system in which wireless devices form a group in accordance with a peer-to-peer protocol and, at a later time, a device may send an invitation request to trigger the devices tore-form the peer-to-peer group. The invitation request may contain an identifier that is associated with a set of a plurality of devices. Those devices may be related such that they perform a function for which a user would want to use those devices together. The group of devices, for example, may be multimedia devices that receive and present streaming multimedia content or may be human interface devices that collectively act as an interface for a work station incorporating a wireless computing device operated by a user. Requesting that remote devices concurrently re-form a group reduces the time and spectral congestion associated with re-forming the group, particularly when the remote devices may periodically enter a low power state.
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公开(公告)号：US09565708B2
公开(公告)日：2017-02-07
申请号：US13112905
申请日：2011-05-20
CPC分类号： H04W76/023 , H04W76/14 , H04W84/12
摘要： A wireless device that automatically forms a connection to a remote device in accordance with a peer-to-peer protocol. The remote device may be designated as an auto-connect device for the wireless device such that, when the wireless device determines that it is in the vicinity of the auto-connect device, it can re-form a connection to the remote device based on stored information for re-establishing connections among a persistent group of devices, but without any express user input. When a user requests that the wireless device perform a function that involves interaction with an auto-connect device, that function may be performed with the delay associated with forming a connection. Any of multiple techniques may be employed for identifying devices designated as auto-connect devices and for determining when the wireless device and a remote, auto-connect devices are in close proximity.
摘要翻译： 根据点对点协议自动形成与远程设备的连接的无线设备。 远程设备可以被指定为无线设备的自动连接设备，使得当无线设备确定它在自动连接设备附近时，它可以基于以下方式重新建立到远程设备的连接： 存储的信息用于在持久的设备组之间重新建立连接，但没有任何明确的用户输入。 当用户请求无线设备执行涉及与自动连接设备交互的功能时，可以以与形成连接相关联的延迟来执行该功能。 可以采用多种技术中的任何一种来识别被指定为自动连接设备的设备，并且用于确定无线设备何时和远程的自动连接设备紧邻。
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