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

IPC分类号： H04B1/713 ,  H04J13/00

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。

公开(公告)号：US06970495B1

公开(公告)日：2005-11-29

申请号：US09634053

申请日：2000-08-08

申请人： Timothy M. Schmidl ,  Anand G. Dabak ,  Mohammed Nafie ,  Alan Gatherer

发明人： Timothy M. Schmidl ,  Anand G. Dabak ,  Mohammed Nafie ,  Alan Gatherer

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。

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

IPC分类号： H04W72/04 ,  H04W84/18 ,  H04Q7/00

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。

公开(公告)号：US06834046B1

公开(公告)日：2004-12-21

申请号：US09679657

申请日：2000-10-04

申请人： Srinath Hosur ,  Sundararajan Sriram ,  Timothy M. Schmidl ,  Anand G. Dabak

发明人： Srinath Hosur ,  Sundararajan Sriram ,  Timothy M. Schmidl ,  Anand G. Dabak

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。

公开(公告)号：US06831956B1

公开(公告)日：2004-12-14

申请号：US09669813

申请日：2000-09-26

申请人： Timothy M. Schmidl ,  Alan Gatherer ,  Srinath Hosur ,  Anand G. Dabak

发明人： Timothy M. Schmidl ,  Alan Gatherer ,  Srinath Hosur ,  Anand G. Dabak

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）。

公开(公告)号：US06798737B1

公开(公告)日：2004-09-28

申请号：US09413314

申请日：1999-10-06

申请人： Anand G. Dabak ,  Srinath Hosur ,  Timothy M. Schmidl

发明人： Anand G. Dabak ,  Srinath Hosur ,  Timothy M. Schmidl

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。

公开(公告)号：US06404826B1

公开(公告)日：2002-06-11

申请号：US09218939

申请日：1998-12-22

申请人： Timothy M. Schmidl ,  Anand G. Dabak ,  Srinath Hosur

发明人： Timothy M. Schmidl ,  Anand G. Dabak ,  Srinath Hosur

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。

公开(公告)号：US08767848B2

公开(公告)日：2014-07-01

申请号：US13335705

申请日：2011-12-22

申请人： Taejoon Kim ,  Timothy M. Schmidl

发明人： Taejoon Kim ,  Timothy M. Schmidl

IPC分类号： H04L27/28 ,  H04L25/02 ,  H04J11/00 ,  H04L27/26 ,  H04L5/00

CPC分类号： H04J11/0079 ,  H04L5/0044 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/262 ,  H04L27/266 ,  H04L27/2675 ,  H04L27/2695

摘要： In at least some embodiments, a receiver includes channel estimation logic configured to a process a long training field symbol having a doubled cyclic prefix. The channel estimation logic is configured to vary an amount of the doubled cyclic prefix used for channel estimation. Further, in some embodiments, a wireless communication device includes logic to enable communications based on at least two long training field symbols having a doubled cyclic prefix as part of a synchronization header. Further, in some embodiments, a method includes receiving a long training field symbol having a synchronization header with a doubled cyclic prefix and varying an amount of the doubled cyclic prefix used for channel estimation.

摘要翻译： 在至少一些实施例中，接收机包括被配置成具有双重循环前缀的长训练场符号的处理的信道估计逻辑。 信道估计逻辑被配置为改变用于信道估计的双倍循环前缀的量。 此外，在一些实施例中，无线通信设备包括基于具有双重循环前缀的至少两个长训练场符号进行通信的逻辑，作为同步头部的一部分。 此外，在一些实施例中，一种方法包括接收具有双重循环前缀的同步头部并改变用于信道估计的双倍循环前缀的量的长训练场符号。

公开(公告)号：US08553730B2

公开(公告)日：2013-10-08

申请号：US12868397

申请日：2010-08-25

申请人： Timothy M. Schmidl ,  Anuj Batra ,  Srinath Hosur

发明人： Timothy M. Schmidl ,  Anuj Batra ,  Srinath Hosur

IPC分类号： H04J3/06

CPC分类号： H04W56/001 ,  H04L27/2613 ,  H04L27/2634 ,  H04W4/80

摘要： A method includes receiving a first plurality of symbols comprising complex portions. The method further includes applying conjugate symmetry to the first plurality of symbols, producing a second plurality of symbols comprising no complex portions. The method further includes transforming the second plurality of symbols using an inverse fast Fourier transform, producing a third plurality of symbols. The method further includes interpolating the third plurality of symbols, generating a short training field comprising at least one real portion of the third plurality of symbols, generating a long training field comprising at least one real portion of the third plurality of symbols, and transmitting the short training field and long training field in a WPAN.

摘要翻译： 一种方法包括接收包括复数部分的第一多个符号。 该方法还包括将共轭对称性应用于第一多个符号，产生不包含复杂部分的第二多个符号。 该方法还包括使用快速傅里叶反变换来变换第二多个符号，产生第三个多个符号。 该方法还包括内插第三多个符号，产生包括第三多个符号的至少一个实部的短训练场，产生包括第三多个符号的至少一个实部的长训练场，并发送 短期培训领域和长期培训领域的WPAN。

公开(公告)号：US08391228B2

公开(公告)日：2013-03-05

申请号：US12760513

申请日：2010-04-14

申请人： Anuj Batra ,  Timothy M. Schmidl ,  Srinath Hosur ,  June Chul Roh

发明人： Anuj Batra ,  Timothy M. Schmidl ,  Srinath Hosur ,  June Chul Roh

IPC分类号： H04W4/00 ,  H04W72/04

CPC分类号： H04W4/80 ,  H04L27/18 ,  H04L27/20 ,  H04L27/2675 ,  H04L69/22 ,  H04W52/36 ,  H04W52/367 ,  H04W72/0453 ,  H04W74/0816

摘要： In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation. The PHY layer is configured to construct a physical-layer service data unit (PSDU) based on a concatenate block, an insert shortened bits block, a Bose, Ray-Chaudhuri, Hocquenghem (BCH) encoder, a remove shortened bits block, an add pad bits block, a spreader, a bit interleaver, a scrambler, and a symbol mapper.

摘要翻译： 在至少一些实施例中，通信设备包括具有物理（PHY）层的收发器。 基于用于BAN分组传输的恒定符号速率并且基于M-ary PSK，差分M-ary PSK或旋转差分M-ary PSK调制，PHY层被配置用于在有限多径环境中的体区域网络（BAN）操作。 PHY层被配置为基于级联块，插入缩短的比特块，Bose，Ray-Chaudhuri，Hocquenghem（BCH）编码器，移除缩短的比特块，加法来构造物理层服务数据单元（PSDU） 填充比特块，扩展器，比特交织器，加扰器和符号映射器。