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61.发明授权公开(公告)号：US06973117B1
公开(公告)日：2005-12-06
申请号：US09634473
申请日：2000-08-08
申请人： Timothy M. Schmidl , Anand G. Dabak
发明人： Timothy M. Schmidl , Anand G. Dabak
CPC分类号： H04B1/7143 , H04J13/00
摘要： In a duplex link (40, 60, 90, 116) coupling first and second frequency hopping wireless communication devices, either or both of the frequency hopping patterns that are respectively used in the downlink and the uplink can be selectively and dynamically extended. Extension of the frequency hopping pattern associated with the uplink (55, 74) can compensate for a power imbalance between the uplink and the downlink by improving the gain of the uplink. By extending the frequency hopping pattern associated with the downlink (106, 129), strong interfering frequencies that would otherwise interfere with many downlink frequencies can be avoided.
摘要翻译： 在耦合第一和第二跳频无线通信设备的双工链路（40,60,90,116）中，可以选择性地和动态地扩展在下行链路和上行链路中分别使用的跳频模式中的一个或两个。 与上行链路（55,74）相关联的跳频模式的扩展可以通过改善上行链路的增益来补偿上行链路和下行链路之间的功率不平衡。 通过扩展与下行链路（106,129）相关联的跳频模式，可以避免否则会干扰许多下行链路频率的强干扰频率。
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62.发明授权公开(公告)号：US06970495B1
公开(公告)日：2005-11-29
申请号：US09634053
申请日：2000-08-08
IPC分类号： H04B1/713
CPC分类号： H04B1/713
摘要： The frequency hopping pattern of a first wireless communication device is modified such that each transmission (73) to a second wireless communication device is on a frequency (MSj+1) that the second device's normal frequency hopping pattern specifies for one of the second device's next several transmissions to the first device. This permits the second device to make quality measurements (54) on a frequency that the second device will soon use (51) for transmission to the first device.
摘要翻译： 修改第一无线通信设备的跳频模式，使得到第二无线通信设备的每个传输（73）处于第二设备的正常跳频模式的频率（MS＆lt; j + 1＆gt;） 指定第二设备的下一个传输到第一设备之一。 这允许第二设备对第二设备将很快使用的频率（51）进行质量测量（54）以传输到第一设备。
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63.发明授权公开(公告)号：US06970440B1
公开(公告)日：2005-11-29
申请号：US09633945
申请日：2000-08-08
申请人： Timothy M. Schmidl , Anand G. Dabak
发明人： Timothy M. Schmidl , Anand G. Dabak
CPC分类号： H04W72/02 , H04B1/7143 , H04W28/22 , H04W84/18
摘要： In wireless communications between first and second frequency hopping wireless communication devices, both devices can dwell on a single selected frequency (f11) for selected types of data transmissions such as large data bursts and data requiring an enhanced quality of service. For a large data burst, the data transmission rate can also be increased (DH5) during the duration (Ti) of the frequency dwelling, thereby reducing the transmission time of the burst. In addition, the combination of frequency dwelling with an increased data transmission rate can advantageously be used to free time slots in a wireless communication link between the devices, which freed time slots would not otherwise be available.
摘要翻译： 在第一和第二跳频无线通信设备之间的无线通信中，两个设备可以驻留在用于所选类型的数据传输的单个选定频率（f 11），例如大数据突发和需要增强质量的数据 的服务。 对于大的数据突发，在频率驻留的持续时间（T i i i i）期间也可以增加数据传输速率（DH5），从而减少突发的传输时间。 此外，频率驻留与增加的数据传输速率的组合可以有利地用于释放设备之间的无线通信链路中的时隙，这些时隙将不再适用。
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64.发明授权Acquisition of an unevenly spaced synchronization channel in a wireless communication system 有权在无线通信系统中获取不均匀间隔的同步信道公开(公告)号：US06834046B1
公开(公告)日：2004-12-21
申请号：US09679657
申请日：2000-10-04
IPC分类号： H04B7216
CPC分类号： H04B1/7083
摘要： A method (70) of operating a wireless receiver (UST). The method receives a wireless communicated signal, wherein the signal comprises asymmetrically spaced synchronization channel components. The method also defines (72) a set of signals from the communicated signal, wherein the set spans a number of equal duration time slots and comprises at least a first synchronization channel component and a second synchronization channel component. The method also forms (76) a first signal combination by combining a first portion of the set of signals with a second portion of the set of signals, and it forms (78) a second signal combination by combining a third portion of the set of signals with a fourth portion of the set of signals. Finally, the method detects (80, 82, 84) a location of the first synchronization channel component and a location of the second synchronization channel component in response to at least one of the first and second signal combinations.
摘要翻译： 一种操作无线接收机（UST）的方法（70）。 该方法接收无线通信信号，其中该信号包括不对称间隔的同步信道分量。 该方法还定义（72）来自所传送的信号的一组信号，其中该组跨越多个相等的持续时间时隙，并且包括至少第一同步信道分量和第二同步信道分量。 该方法还通过将该组信号的第一部分与该组信号的第二部分组合来形成（76）第一信号组合，并且它通过组合第二信号组合的第三部分来形成（78）第二信号组合 信号与该组信号的第四部分。 最后，响应于第一和第二信号组合中的至少一个，该方法检测（80,82,84）第一同步信道分量的位置和第二同步信道分量的位置。
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65.发明授权公开(公告)号：US06831956B1
公开(公告)日：2004-12-14
申请号：US09669813
申请日：2000-09-26
IPC分类号： H04B1707
CPC分类号： H04B1/7113
摘要： A wireless receiver (UST). The receiver comprises at least one antenna (ATU) for receiving a plurality of frames (FR) in a form of a plurality of paths. Each of the plurality of frames comprises a plurality of time slots (SLN), and each of the plurality of time slots comprises a plurality of symbols. Further, each of the plurality of paths has a corresponding sample position, wherein the plurality of symbols comprise a primary synchronization code symbol (PSC). The receiver further comprises circuitry (52) for correlating a primary synchronization code across a group of the plurality of symbols and circuitry (52) for identifying a plurality of path positions within the group. Each of the plurality of path positions corresponds to a respective one of a plurality of largest-amplitude paths represented within the group as detected in response to the circuitry for correlating. The receiver further comprises circuitry (56) for defining a plurality of sub-windows. Each of the plurality of sub-windows comprises a plurality of sample positions, and each of the plurality of sub-windows includes at least one of the plurality of identified path positions. Finally, the receiver further comprises circuitry (54, 58) for combining paths selected from the sample positions within the plurality of sub-windows.
摘要翻译： 无线接收器（UST）。 接收机包括用于接收多个路径形式的多个帧（FR）的至少一个天线（ATU）。 多个帧中的每一个包括多个时隙（SLN），并且多个时隙中的每一个包括多个符号。 此外，多个路径中的每一个具有对应的采样位置，其中多个符号包括主同步码符号（PSC）。 接收机还包括电路（52），用于在一组多个符号和电路（52）之间相互关联主同步码，用于识别组内的多个路径位置。 多个路径位置中的每一个对应于响应于用于相关的电路检测到的在组内表示的多个最大幅度路径中的相应一个路径位置。 接收器还包括用于限定多个子窗口的电路（56）。 多个子窗口中的每一个包括多个采样位置，并且多个子窗口中的每一个子窗口包括多个识别的路径位置中的至少一个。 最后，接收机还包括用于组合从多个子窗口内的样本位置选择的路径的电路（54,58）。
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66.发明授权Use of Walsh-Hadamard transform for forward link multiuser detection in CDMA systems 有权在CDMA系统中使用沃尔什 - 哈达玛变换进行前向链路多用户检测公开(公告)号：US06798737B1
公开(公告)日：2004-09-28
申请号：US09413314
申请日：1999-10-06
IPC分类号： H04J1100
CPC分类号： H04B1/71075 , H04B1/7115
摘要： A station capable of receiving information containing Walsh coding for a plurality of channels and canceling interference from the received information and the method of cancellation. A memory is provided for storing received signals containing a Walsh code for each of a plurality of channels as well as reflected and/or refracted versions of said received signals and a first plurality of signal paths is provided which are selectively coupled to the memory. The signal paths apply corresponding delays and inverse Walsh code transformations to separate the channels. Further, cancellation of the channels interfering with a desired channel proceeds with complementary delays and Walsh code transformation to regenerate the interference which is subtracted from the received signal in memory.
摘要翻译： 一种能够接收包含用于多个信道的沃尔什编码的信息并且从接收的信息中消除干扰的消息的站和消除方法。 提供存储器用于存储包含多个通道中的每一个的沃尔什码的接收信号以及所述接收信号的反射和/或折射版本，并且提供选择性地耦合到存储器的第一多个信号路径。 信号路径应用相应的延迟和反向沃尔什码变换来分离信道。 此外，干扰所需信道的信道的消除继续进行互补延迟和沃尔什码变换以再生从存储器中的接收信号中减去的干扰。
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公开(公告)号：US06404826B1
公开(公告)日：2002-06-11
申请号：US09218939
申请日：1998-12-22
IPC分类号： H04L2706
CPC分类号： H04B1/7097 , H04L1/20
摘要： A circuit is designed with an estimate circuit (132) coupled to receive a plurality of predetermined signals (416-418) from an external source. Each of the predetermined signals is spaced apart in time. The estimate cit produces a first estimate signal in response to at least one of the plurality of predetermined signals. An averaging circuit is coupled to receive a data signal 420 and at least one of the plurality of predetermined signals. The averaging circuit produces an average signal from the data signal and at least one of the plurality of predetermined signals.
摘要翻译： 电路被设计成具有耦合以从外部源接收多个预定信号（416-418）的估计电路（132）。 每个预定信号在时间上间隔开。 估计值响应于多个预定信号中的至少一个产生第一估计信号。 平均电路被耦合以接收数据信号420和多个预定信号中的至少一个。 平均电路从数据信号和多个预定信号中的至少一个产生平均信号。
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公开(公告)号：US10044532B2
公开(公告)日：2018-08-07
申请号：US11688756
申请日：2007-03-20
IPC分类号： H04B7/02 , H04L1/02 , H04L25/03 , H04B7/0417 , H04B7/06 , H04L1/06 , H04L1/00 , H04L5/00 , H04L25/02 , H04L27/26
摘要： The present invention provides a receiver. In one embodiment, the receiver includes a receive portion employing transmission signals from a transmitter having multiple antennas and capable of providing channel estimates. The receiver also includes a feedback generator portion configured to provide to the transmitter a pre-coder selection for data transmission that is based on the channel estimates, wherein the pre-coder selection corresponds to a grouping of frequency-domain resource blocks. The present invention also provides a transmitter having multiple antennas. In one embodiment, the transmitter includes a transmit portion coupled to the multiple antennas and capable of applying pre-coding to a data transmission for a receiver. The transmitter also includes a feedback decoding portion configured to decode a pre-coder selection for the data transmission that is fed back from the receiver, wherein the pre-coder selection corresponds to a grouping of frequency-domain resource blocks.
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公开(公告)号：US09030932B2
公开(公告)日：2015-05-12
申请号：US13593428
申请日：2012-08-23
IPC分类号： H04L12/413 , H04B3/54
CPC分类号： H04L12/413 , H04B3/54 , H04B3/542 , H04B2203/5408 , H04B2203/5433 , H04L69/02
摘要： Systems and methods for enhanced carrier sense multiple access (CSMA) protocols are described. In various implementations, these systems and methods may be applicable to Power Line Communications (PLC). For example, a method may include attempting to access a communications channel to transmit a frame after a backoff time proportional to a randomly generated number within a contention window (CW), the CW having an initial value carried over from a previous transmission of a different frame. Additionally or alternatively, some of techniques described herein may facilitate the spreading of the time over which devices attempt to transmit packets, thereby reducing the probability of collisions using, for example, Additive Decrease Multiplicative Increase (ADMI) mechanisms.
摘要翻译： 描述了用于增强载波侦听多路访问（CSMA）协议的系统和方法。 在各种实现中，这些系统和方法可以适用于电力线通信（PLC）。 例如，一种方法可以包括在与争用窗口（CW）中的随机生成的数字成比例的退避时间之后尝试访问通信信道以发送帧，所述CW具有从先前的不同的传输中携带的初始值 帧。 附加地或替代地，本文描述的技术中的一些技术可以有助于扩展这些设备尝试发送分组的时间，由此例如使用添加减少乘数增加（ADMI）机制来减少冲突的概率。
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公开(公告)号：US08867629B2
公开(公告)日：2014-10-21
申请号：US13442248
申请日：2012-04-09
申请人： Anand G. Dabak , Gang Xu
发明人： Anand G. Dabak , Gang Xu
CPC分类号： H04B3/54 , H04B2203/542
摘要： A method of power line communications includes obtaining timing information for an AC mains signal transmitted on a power line in a power line communication (PLC) system that includes at least one receiver and at least one other device connected on the power line which provides variable loading during cycles of the AC mains signal. A first loading interval within at least a first cycle of the cycles having lower loading and at least a second loading interval within said first cycle having higher loading are identified using the timing information. At least one data packet is transmitted only during the first loading interval over the power line to the receiver.
摘要翻译： 电力线通信的方法包括获得在包括至少一个接收器的电力线通信（PLC）系统中的电力线上传输的AC电力信号的定时信息，以及连接在电力线上的至少一个其他设备，其提供可变负载 在交流电源信号的周期。 使用定时信息来识别在具有较高负载的所述第一周期内具有较低负载和至少第二负载间隔的周期的至少第一周期内的第一加载间隔。 至少一个数据分组仅在电力线上的第一加载间隔期间被发送到接收机。
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