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公开(公告)号：US20080279128A1
公开(公告)日：2008-11-13
申请号：US11899276
申请日：2007-09-05
申请人： Amer A. Hassan , Deyun Wu , Hui Shen , Christian Huitema , Thomas W. Kuehnel
发明人： Amer A. Hassan , Deyun Wu , Hui Shen , Christian Huitema , Thomas W. Kuehnel
IPC分类号： H04B7/00
摘要： A system and method for providing the ability to discover the capabilities of a user's computer to determine whether it is capable of supporting more than one wireless protocol simultaneously is provided. A computing device's capabilities (including, for example, hardware and/or software capabilities) is checked to determine if it supports at least two specific wireless protocols and checking a computing device's capabilities (including, for example, hardware and/or software capabilities) is checked to determine if it supports both wireless protocols simultaneously. The techniques for determining the computing device's compatibility may include comparing lists of protocol requirements to lists of system capabilities and/or generating test signals by the system according to the protocol.
摘要翻译： 提供了一种用于提供发现用户计算机的能力以确定其是否能够同时支持多于一个无线协议的能力的系统和方法。 检查计算设备的能力（包括例如硬件和/或软件能力）以确定其是否支持至少两个特定的无线协议并且检查计算设备的能力（包括例如硬件和/或软件能力）是 检查以确定它是否同时支持两个无线协议。 用于确定计算设备的兼容性的技术可以包括将协议要求的列表与根据协议的系统的系统能力的列表和/或生成测试信号进行比较。
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公开(公告)号：US20080279093A1
公开(公告)日：2008-11-13
申请号：US11801803
申请日：2007-05-11
申请人： Amer A. Hassan , Bernard D. Aboba , Jiansong Zhang , Kun Tan
发明人： Amer A. Hassan , Bernard D. Aboba , Jiansong Zhang , Kun Tan
IPC分类号： G06F11/00
CPC分类号： H04L1/20 , H04L1/0002 , H04L1/0019
摘要： A computing device configured for wireless communication may effectively control adaptation to channel conditions. The device may be configured to identify and classify conditions impacting performance of a channel so that appropriate adaptations may be made. Interference may be detected by correlating received signal strength and packet errors. High received signal strength correlated to a high packet error rate may signify presence of a source of interference. Once a source of interference is detected, other criteria may be used to determine the nature of the interference so that an adaptation that is minimally disruptive of applications can be selected. Additionally, channel degradation may be predicted by monitoring trends in error rates, including Forward Error Correction rates, and adaptation may be used before packet error rates exceed an unacceptable level.
摘要翻译： 配置用于无线通信的计算设备可以有效地控制对信道条件的适配。 该设备可以被配置为识别和分类影响信道性能的条件，以便进行适当的调整。 可以通过将接收的信号强度和分组错误相关联来检测干扰。 与高分组错误率相关的高接收信号强度可能意味着存在干扰源。 一旦检测到干扰源，可以使用其他标准来确定干扰的性质，从而可以选择最小程度地破坏应用的适配。 另外，可以通过监视错误率的趋势（包括前向纠错率）来预测信道恶化，并且可以在分组错误率超过不可接受的水平之前使用适配。
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公开(公告)号：US20080137548A1
公开(公告)日：2008-06-12
申请号：US11635869
申请日：2006-12-08
申请人： Amer A. Hassan , Vishesh M. Parikh , Thomas W. Kuehnel , Deyun Wu , Christian Huitema , David Jones , Andrew Baron
发明人： Amer A. Hassan , Vishesh M. Parikh , Thomas W. Kuehnel , Deyun Wu , Christian Huitema , David Jones , Andrew Baron
IPC分类号： G06F11/30
摘要： Capability checking to examine a computing device's capabilities to determine if the device supports a software defined radio to communicate according to a specific wireless protocol. Applicants have appreciated that as the reliance on software defined radio increases, numerous potential options may be available to a user for performing wireless communication. Applicants have appreciated the desirability of providing the ability to discover the capabilities of a user's computer to determine whether it is capable of supporting one or more wireless protocols.
摘要翻译： 检查计算设备能力以确定设备是否支持根据特定无线协议进行通信的软件定义无线电的能力检查。 申请人已经意识到，随着对软件定义的无线电的依赖性的增加，许多潜在的选项可供用户进行无线通信。 申请人已经意识到提供发现用户计算机的功能以确定其是否能够支持一个或多个无线协议的能力的可取性。
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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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56.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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