公开(公告)号：US20100111138A1

公开(公告)日：2010-05-06

申请号：US12685404

申请日：2010-01-11

申请人： Srinath Hosur ,  Jaiganesh Balakrishnan ,  Anuj Batra

发明人： Srinath Hosur ,  Jaiganesh Balakrishnan ,  Anuj Batra

IPC分类号： H04B1/69

CPC分类号： H04L27/2602 ,  H04B1/7176

摘要： The present invention provides a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system, particularly an ultra-wideband (UWB) system. The present invention provides a data input, which passes data to a randomizer. The data then passes to a convolutional code function, the output of which is punctured by puncturing function. An interleaver function receives the punctured code data, and cooperatively operates with a mapper element to prepare the coded data for pre-transmission conversion by an IFFT. The mapper element comprises a dual carrier modulation function, which associates and transforms two punctured code data elements into a format for transmission on two separate signal tones.

摘要翻译： 本发明提供了一种用于在正交频分复用（OFDM）系统，特别是超宽带（UWB）系统内的多个载波路径上选择性地扩展载波数据的通用系统。 本发明提供一种将数据传递给随机发生器的数据输入。 数据然后传递到卷积码功能，其输出由穿孔功能打孔。 交织器功能接收穿孔码数据，并与映射器元件协作操作以通过IFFT准备用于预传输转换的编码数据。 映射器元件包括双载波调制功能，其将两个穿孔码数据元素相关联并变换为用于在两个分离的信号音调上传输的格式。

公开(公告)号：US07532661B2

公开(公告)日：2009-05-12

申请号：US11054961

申请日：2005-02-10

申请人： Anuj Batra ,  Jaiganesh Balakrishnan

发明人： Anuj Batra ,  Jaiganesh Balakrishnan

IPC分类号： H04B1/00

CPC分类号： H04L27/2613 ,  H04B1/709 ,  H04J13/107 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0032 ,  H04L5/0048 ,  H04L5/0062 ,  H04L5/0092 ,  H04L25/0226 ,  H04L25/03828

摘要： A wireless device 10, 12 that distinguishes between multiple piconets is provided. The wireless device 10, 12 includes a preamble component operable to provide a preamble for a wireless fixed frequency interleaving transmission. The wireless device 10, 12 also includes a correlator component operable to distinguish a wireless transmission based on the preamble. The preamble is based on a 128-length sequence 120, 136, 144, formed using a 16-length sequence and a 8-length sequence. The 16-length sequence is selected from the group consisting of a first 16-length sequence 110, a second 16-length sequence 132, and a third 16-length sequence 140. The 8-length sequence is selected from the group consisting of a first 8-length sequence 112, a second 8-length sequence 134, and a third 8-length sequence 144.

摘要翻译： 提供了区分多个微微网的无线设备10,12。 无线设备10,12包括可用于为无线固定频率交织传输提供前置码的前同步码组件。 无线设备10,12还包括可用于基于前导码区分无线传输的相关器组件。 前导码基于使用16长度序列和8长度序列形成的128长度序列120,136,144。 16长度序列选自由第一个16长度序列110，第二个16长度序列132和第三个16长度序列140组成的组.8个长度序列选自由 第一8长度序列112，第二8长度序列134和第三8长度序列144。

公开(公告)号：US07440491B2

公开(公告)日：2008-10-21

申请号：US10759480

申请日：2004-01-16

申请人： Jaiganesh Balakrishnan ,  Anuj Batra ,  Anand G. Dabak ,  Abdellatif Bellaouar ,  Paul H. Fontaine ,  Michel Frechette ,  Ranjit Gharpurey ,  Heng-Chih Lin

发明人： Jaiganesh Balakrishnan ,  Anuj Batra ,  Anand G. Dabak ,  Abdellatif Bellaouar ,  Paul H. Fontaine ,  Michel Frechette ,  Ranjit Gharpurey ,  Heng-Chih Lin

IPC分类号： H04B1/00

CPC分类号： H04B1/719 ,  H04B1/71635 ,  H04B1/71637

摘要： System for ultra-wideband communications providing high data rates over an extended operating range in the presence of interferers. A preferred embodiment comprises an ultra-wideband (UWB) device that makes use of a portion of the UWB frequency range to help provide good performance in the presence of interferers. Additionally, since only a portion of the UWB frequency range is used, multiple devices can simultaneously transmit and receive by using different portions of the UWB frequency range.

摘要翻译： 用于在存在干扰源的情况下在扩展工作范围内提供高数据速率的超宽带通信系统。 优选实施例包括利用UWB频率范围的一部分来帮助在存在干扰源的情况下提供良好性能的超宽带（UWB）设备。 此外，由于仅使用UWB频率范围的一部分，所以多个设备可以通过使用UWB频率范围的不同部分同时发送和接收。

公开(公告)号：US20060008017A1

公开(公告)日：2006-01-12

申请号：US11174401

申请日：2005-07-01

申请人： Jaiganesh Balakrishnan ,  Anuj Batra ,  Hirohisa Yamaguchi

发明人： Jaiganesh Balakrishnan ,  Anuj Batra ,  Hirohisa Yamaguchi

IPC分类号： H04K1/10

CPC分类号： H04L27/2613 ,  H04B1/719 ,  H04L25/03828 ,  H04L27/2626

摘要： A method of wirelessly communicating is disclosed. The method comprises generating a plurality of tones for a wideband orthogonal frequency division multiplex symbol (310), the tones including a plurality of contiguous zero-valued tones, inverse Fourier transforming the tones to a plurality of time-domain samples (312), copying a plurality of the time-domain samples as a portion of a cyclic block (314), the cyclic block (314) contiguous with the time-domain samples (312), time-domain window filtering the time-domain samples (312) and the cyclic block (314) to form a portion of the wideband orthogonal frequency division multiplex symbol (310), wherein the time-domain window filter (350) is a function φ(k) having the property that φ(k)+φ(k+Nfft) is about equal to a constant θ where Nfft is the number of tones, and transmitting the wideband orthogonal frequency division multiplex symbol (310).

摘要翻译： 公开了一种无线通信的方法。 该方法包括：生成用于宽带正交频分复用符号（310）的多个音调，该音调包括多个连续的零值音调，将音调逆傅里叶变换为多个时域采样（312），复制 作为循环块（314）的一部分的多个时域采样，与时域采样（312）连续的循环块（314），时域采样（312）的时域窗口滤波和 所述循环块（314）形成所述宽带正交频分多路复用符号（310）的一部分，其中所述时域窗口滤波器（350）是具有所述phi（k）+ phi（k） k + N ft ft ft ft is is is is about about about about about about about about about where where and and and and and and and and and and and and and and and and and and and and and and and and and and and and and and and and。

公开(公告)号：US20050232139A1

公开(公告)日：2005-10-20

申请号：US11109567

申请日：2005-04-19

申请人： Jaiganesh Balakrishnan ,  Anuj Batra

发明人： Jaiganesh Balakrishnan ,  Anuj Batra

IPC分类号： H04J3/00 ,  H04J3/16 ,  H04J3/22 ,  H04J11/00 ,  H04L1/00 ,  H04L27/26

CPC分类号： H04L1/0057 ,  H04J13/16 ,  H04L1/0071 ,  H04L27/2602

摘要： A transmitter 200 is provided. The transmitter 200 comprises a block encoder 203 operable to encode a bit stream using a first block size for a first portion of a message according to an orthogonal frequency division multiplex protocol and a second block size for a second portion of the message.

摘要翻译： 提供发射机200。 发射机200包括块编码器203，其可操作以根据正交频分多路复用协议对消息的第一部分使用第一块大小来编码比特流，以及为消息的第二部分对第二块大小进行编码。

公开(公告)号：US20050050130A1

公开(公告)日：2005-03-03

申请号：US10932894

申请日：2004-09-02

申请人： Anand Dabak ,  Anuj Batra ,  Jaiganesh Balakrishnan

发明人： Anand Dabak ,  Anuj Batra ,  Jaiganesh Balakrishnan

IPC分类号： G06F17/15 ,  H04J1/16 ,  H04J3/06 ,  H04L7/04 ,  H04L27/26

CPC分类号： H04J1/16 ,  H04J3/0682 ,  H04L7/041 ,  H04L27/2601

摘要： System and method for determining a separation between communicating devices. A preferred embodiment comprises a first device transmitting a signal over multiple subbands to a second device, the second device determining a timing for the signal by processing the signal in each subband separately. The second device then transmits a signal back to the first device along with timing information (again, over multiple subbands). The first device then determines a timing for the signal and by determining a difference in the timing information provided by the second device and timing information it determines, the first device can compute the separation between it and the second device. The use of multiple subbands can dedicate more bandwidth to the transmission of the signal, permitting greater resolution.

摘要翻译： 用于确定通信设备之间的间隔的系统和方法。 优选实施例包括将多个子带上的信号发送到第二设备的第一设备，第二设备通过分别处理每个子带中的信号来确定信号的定时。 然后，第二设备连同定时信息（再次，通过多个子带）一起发送回到第一设备的信号。 然后，第一设备确定信号的定时，并且通过确定由第二设备提供的定时信息和它确定的定时信息的差异，第一设备可以计算它与第二设备之间的间隔。 使用多个子带可以将更多的带宽专用于信号的传输，从而允许更高的分辨率。

公开(公告)号：US08805312B2

公开(公告)日：2014-08-12

申请号：US13193088

申请日：2011-07-28

申请人： Jaiganesh Balakrishnan

发明人： Jaiganesh Balakrishnan

IPC分类号： H04B17/00

CPC分类号： H04B1/12 ,  H04B1/10 ,  H04B1/1027 ,  H04B1/1646 ,  H04B17/20 ,  H04B17/318 ,  H04B17/336 ,  H04B2001/1054 ,  H04H40/72

摘要： A wireless receiver (10) includes a down converter module (210) operable to deliver a signal having a signal bandwidth that changes over time, a dynamically controllable filter module (200) having a filter bandwidth and fed by said down converter module (210), and a measurement module (295) operable to at least approximately measure the signal bandwidth, said dynamically controllable filter module (200) responsive to said measurement module (295) to dynamically adjust the filter bandwidth to more nearly match the signal bandwidth as it changes over time, whereby output from said filter module (200) is noise-reduced. Other wireless receivers, electronic circuits, and processes for their operation are disclosed.

摘要翻译： 无线接收器（10）包括可转换信号的下变频器模块（210），其具有随时间变化的信号带宽，具有滤波器带宽并由所述下变换器模块（210）馈送的动态可控滤波器模块（200） ，以及可操作以至少近似地测量所述信号带宽的测量模块（295），所述动态可控滤波器模块（200）响应于所述测量模块（295）来动态地调整所述滤波器带宽，使得所述滤波器带宽随着其变化而更接近所述信号带宽 随着时间的推移，来自所述滤波器模块（200）的输出被降噪。 公开了其他无线接收机，电子电路及其操作的处理。

公开(公告)号：US07668265B2

公开(公告)日：2010-02-23

申请号：US11173840

申请日：2005-07-01

申请人： Jaiganesh Balakrishnan ,  Hirohisa Yamaguchi

发明人： Jaiganesh Balakrishnan ,  Hirohisa Yamaguchi

IPC分类号： H03D1/04

CPC分类号： H04L27/2613 ,  H04B1/719 ,  H04L25/03828 ,  H04L27/2626

摘要： A method of wirelessly communicating is disclosed. The method comprises determining a matrix W based in part on limiting a plurality of active interference cancellation tone values (416), determining the active interference cancellation tone values (416) based on W and based on a plurality of information data values (410), and transmitting an orthogonal frequency division multiplex signal (310) based on the plurality of active interference cancellation tone values (416) and the information data values (410).

摘要翻译： 公开了一种无线通信的方法。 该方法包括：基于限制多个主动干扰消除音调值（416），基于W并基于多个信息数据值（410）确定主动干扰消除音调值（416）来确定矩阵W， 以及基于所述多个有源干扰消除音调值（416）和所述信息数据值（410）发送正交频分复用信号（310）。

公开(公告)号：US07305028B2

公开(公告)日：2007-12-04

申请号：US10390289

申请日：2003-03-17

申请人： Jaiganesh Balakrishnan ,  Richard K. Martin ,  C. Richard Johnson, Jr.

发明人： Jaiganesh Balakrishnan ,  Richard K. Martin ,  C. Richard Johnson, Jr.

IPC分类号： H03K5/159 ,  H04B1/10

CPC分类号： H04L25/03012 ,  H04L2025/03414

摘要： A method for equalizing data and systems utilizing the method. The method of this invention for equalizing (by shortening the channel response) data includes minimizing a function of the data and a number of equalizer characteristic parameters, where the function utilizes auto-correlation data corresponding to equalized data. Updated equalizer characteristic parameters are then obtained from the minimization and an initial set of equalizer characteristic parameters. Finally, the received data is processed utilizing the equalizer defined by the minimization. The method of this invention can be implemented in an equalizer and the equalizer of this invention may be included in a system for receiving data.

摘要翻译： 一种利用该方法均衡数据和系统的方法。 用于均衡（通过缩短信道响应）数据的本发明的方法包括最小化数据的功能和多个均衡器特性参数，其中该功能利用对应于均衡数据的自相关数据。 然后从最小化和初始的均衡器特征参数集获得更新的均衡器特征参数。 最后，使用由最小化定义的均衡器来处理接收到的数据。 本发明的方法可以在均衡器中实现，并且本发明的均衡器可以被包括在用于接收数据的系统中。

公开(公告)号：US20070076804A1

公开(公告)日：2007-04-05

申请号：US11240203

申请日：2005-09-30

申请人： Charles Sestok ,  Anand Dabak ,  Jaiganesh Balakrishnan

发明人： Charles Sestok ,  Anand Dabak ,  Jaiganesh Balakrishnan

IPC分类号： H04K1/10

CPC分类号： H04L25/0232 ,  H04B1/123 ,  H04L27/261

摘要： The present invention provides an image-rejecting channel estimator for use with an orthogonal frequency division multiplex (OFDM) receiver employing scattered pilot channel estimates. In one embodiment, the image-rejecting channel estimator includes an estimation interpolator configured to provide channel estimates through time interpolation and frequency interpolation employing the scattered pilot channel estimates. The image-rejecting channel estimator also includes an image-rejection formatter coupled to the estimation interpolator and configured to provide image-rejection filtering to suppress an image in an output spectrum of the channel estimates from at least one of the time interpolation and frequency interpolation.

摘要翻译： 本发明提供一种与使用分散导频信道估计的正交频分复用（OFDM）接收机一起使用的图像拒绝信道估计器。 在一个实施例中，图像拒绝信道估计器包括估计内插器，被配置为通过使用分散导频信道估计的时间插值和频率插值来提供信道估计。 图像拒绝信道估计器还包括耦合到估计内插器的镜像拒绝格式器，并且被配置为提供镜像抑制滤波以从时间插值和频率插值中的至少一个抑制信道估计的输出频谱中的图像。