公开(公告)号：US20060007908A1

公开(公告)日：2006-01-12

申请号：US10884363

申请日：2004-07-02

申请人： Srinath Hosur ,  Michael Polley ,  Manish Goel

发明人： Srinath Hosur ,  Michael Polley ,  Manish Goel

IPC分类号： H04J3/06 ,  H04L12/28

CPC分类号： H04L1/0083 ,  H04B7/0678 ,  H04L7/041 ,  H04L7/06 ,  H04L27/2613

摘要： A device and a method of characterizing a communications channel. The method includes transmitting a first part of a packet preamble using two or more antennas and transmitting a second part of the packet preamble using the two or more antennas. Each antenna transmits an orthogonal encoding of the second part of the packet preamble. The method also includes transmitting a packet header using the two or more antennas and transmitting a packet payload using the two or more antennas. Each antenna transmits an orthogonal encoding of the packet header. The packet payload may be encoded across the transmissions of the two or more antennas.

公开(公告)号：US20050163041A1

公开(公告)日：2005-07-28

申请号：US10765009

申请日：2004-01-26

申请人： Muhammad Ikram ,  Srinath Hosur ,  Michael Polley ,  Manish Goel

发明人： Muhammad Ikram ,  Srinath Hosur ,  Michael Polley ,  Manish Goel

IPC分类号： H04B1/707 ,  H04B7/02 ,  H04J11/00 ,  H04L27/26

CPC分类号： H04B7/02 ,  H04B1/7105 ,  H04B1/7107 ,  H04L1/0631 ,  H04L1/0656 ,  H04L27/2647

摘要： A Hybrid IMMSE-LMMSE receiver processing technique predicts performance of and selects between iterative and non-iterative decoding of symbols based on an intelligent metric. Based on a pre-specified criterion, the receiver determines if a correct first-stage decision is made or not. If a correct decision is made, then it follows iterative processing like in BLAST. Alternatively, if a wrong decision is found to have occurred, the receiver resorts to LMMSE estimation processing.

摘要翻译： 混合IMMSE-LMMSE接收机处理技术基于智能度量预测符号的迭代和非迭代解码之间的性能并进行选择。 根据预先指定的标准，接收机确定是否做出正确的第一阶段决定。 如果做出正确的决定，那么它将像BLAST一样进行迭代处理。 或者，如果发现错误的决定已经发生，接收机将采用LMMSE估计处理。

公开(公告)号：US20050054313A1

公开(公告)日：2005-03-10

申请号：US10811519

申请日：2004-03-29

申请人： Srikanth Gummadi ,  Srinath Hosur ,  Peter Murphy

发明人： Srikanth Gummadi ,  Srinath Hosur ,  Peter Murphy

IPC分类号： H04B17/00 ,  H03C7/02 ,  H04B1/02 ,  H04B7/02

CPC分类号： H04B7/028 ,  H04B17/20

摘要： A method comprising encoding a plurality of signals according to a predetermined negation scheme and transmitting the plurality of signals, wherein each signal is transmitted by way of a wireless channel. The method further comprises receiving a signal, wherein the received signal is a combination of the plurality of transmitted signals, and interpolating between data in the received signal to generate a plurality of systems of equations. The method further comprises solving the plurality of systems of equations to determine a gain and phase shift applied to each of the plurality of transmitted signals by a corresponding wireless channel.

摘要翻译： 一种方法，包括根据预定的否定方案对多个信号进行编码并发送多个信号，其中每个信号通过无线信道发送。 该方法还包括接收信号，其中所接收的信号是多个发射信号的组合，并且在接收信号中的数据之间进行内插以产生多个方程组。 该方法还包括解决多个等式系统以通过相应的无线信道确定应用于多个发射信号中的每一个的增益和相移。

公开(公告)号：US06483821B1

公开(公告)日：2002-11-19

申请号：US09294722

申请日：1999-04-19

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

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

IPC分类号： H04Q700

CPC分类号： H04L25/0228 ,  H04B1/7115 ,  H04B1/712 ,  H04B2201/70701 ,  H04L1/20 ,  H04L25/0204 ,  H04L25/0236

摘要： The present invention is an improved system and method for transmitting and receiving digital information over mobile communication channels. The present invention includes an enhanced channel estimator (34) which iteratively estimates channel amplitude and phase distortion from received pilot and data signal information at various time instants. The iterative channel estimation scheme of the present invention provides increased performance of the transceiver system which allows for efficiencies such as transmission of a minimal amount of pilot information and reduction in the transmitted power.

摘要翻译： 本发明是一种用于通过移动通信信道发送和接收数字信息的改进的系统和方法。 本发明包括增强信道估计器（34），其在不同的时刻迭代地估计来自接收到的导频的信道幅度和相位失真以及数据信号信息。 本发明的迭代信道估计方案提供了收发机系统的增加的性能，其允许诸如传输最小量的导频信息和减少发射功率的效率。

公开(公告)号：US06356605B1

公开(公告)日：2002-03-12

申请号：US09195942

申请日：1998-11-19

申请人： Srinath Hosur ,  Anand G. Dabak

发明人： Srinath Hosur ,  Anand G. Dabak

IPC分类号： H04B710

CPC分类号： H04B7/0845 ,  H04B1/707 ,  H04B7/06 ,  H04L1/0625

摘要： A circuit is designed with a correction circuit (350) coupled to receive a first estimate signal (&agr;j1), a second estimate signal (&agr;j2), and a plurality of input signals from an external source along plural signal paths. The plurality of input signals includes a first and a second input signal (Rj1, Rj2) The correction circuit produces a first symbol estimate in response to the first and second estimate signals and the first and second input signals. The correction circuit produces a second symbol estimate in response to the first and second estimate signals and the first and second input signals. A combining circuit is coupled to receive a plurality of first symbol estimates including the first symbol estimate and a plurality of second symbol estimates including the second symbol estimate. The combining circuit produces a first symbol signal ({tilde over (S)}1) in response to the plurality of first symbol estimates and a second symbol signal ({tilde over (S)}2) in response to the plurality of second symbol estimates. A synchronization circuit (408) is coupled to receive the first and second symbol signals (400-406) and a first known symbol and a second known symbol (410-416). The synchronization circuit produces a synchronization signal (418) in response to an approximate match between the first symbol signal and the first known symbol and between the second symbol signal and the second known symbol.

摘要翻译： 电路被设计成具有被耦合以从多个信号路径从外部源接收第一估计信号（alphaj1），第二估计信号（alphaj2）以及多个输入信号的校正电路（350）。 所述多个输入信号包括第一和第二输入信号（Rj1，Rj2）。所述校正电路响应于所述第一和第二估计信号以及所述第一和第二输入信号而产生第一符号估计。 校正电路响应于第一和第二估计信号以及第一和第二输入信号产生第二符号估计。 组合电路被耦合以接收包括第一符号估计的多个第一符号估计和包括第二符号估计的多个第二符号估计。 响应于多个第一符号估计，组合电路响应于多个第二符号估计而产生第一符号信号（（S）} 1）和第二符号信号（（S）} 2） 估计。 耦合同步电路（408）以接收第一和第二符号信号（400-406）和第一已知符号和第二已知符号（410-416）。 响应于第一符号信号和第一已知符号之间以及第二符号信号和第二已知符号之间的近似匹配，同步电路产生同步信号（418）。

公开(公告)号：USRE44858E1

公开(公告)日：2014-04-22

申请号：US13136059

申请日：2011-07-20

申请人： Srinath Hosur ,  Anand G. Dabak

发明人： Srinath Hosur ,  Anand G. Dabak

IPC分类号： H04B7/185

CPC分类号： H04B7/0669 ,  H04B1/712 ,  H04B2201/70707 ,  H04W52/08 ,  H04W52/241 ,  H04W52/245 ,  H04W52/42

摘要： A circuit is designed with a measurement circuit (432). The measurement circuit is coupled to receive a first input signal (903) from a first antenna (128) of a transmitter and coupled to receive a second input signal (913) from a second antenna (130) of the transmitter. Each of the first and second signals is transmitted at a first time. The measurement circuit produces an output signal corresponding to a magnitude of the first and second signals. A control circuit (430) is coupled to receive the output signal and a reference signal. The control circuit is arranged to produce a control signal at a second time in response to a comparison of the output signal and the reference signal.

摘要翻译： 电路设计有测量电路（432）。 测量电路被耦合以从发射机的第一天线（128）接收第一输入信号（903），并被耦合以从发射机的第二天线（130）接收第二输入信号（913）。 第一和第二信号中的每一个在第一时间被发送。 测量电路产生对应于第一和第二信号的幅度的输出信号。 控制电路（430）被耦合以接收输出信号和参考信号。 控制电路被布置成响应于输出信号和参考信号的比较而在第二时间产生控制信号。

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：US08126092B2

公开(公告)日：2012-02-28

申请号：US10918839

申请日：2004-08-13

申请人： Sundararajan Sriram ,  Srinath Hosur

发明人： Sundararajan Sriram ,  Srinath Hosur

IPC分类号： H04L27/06

CPC分类号： H04B1/70752 ,  H04B1/70735 ,  H04B1/7077 ,  H04B1/7093 ,  H04B2201/70702 ,  H04B2201/70707

摘要： A circuit for detecting a serial signal comprises a first circuit coupled to receive the serial signal during a predetermined plurality of time periods of substantially equal duration. The first circuit is coupled to receive a first code. The first circuit is arranged to compare a part of the serial signal corresponding to each time period of the plurality of timer periods to the first code, thereby producing a match signal. The first circuit accumulates the match signal from each of the each time period of the plurality of time periods.

摘要翻译： 用于检测串行信号的电路包括第一电路，其耦合以在基本相等的持续时间的预定多个时间段内接收串行信号。 第一电路被耦合以接收第一代码。 第一电路被布置为将与多个定时器周期的每个时间段相对应的一部分串行信号与第一代码进行比较，从而产生匹配信号。 第一电路从多个时间段的每个时间段的每一个累加匹配信号。

公开(公告)号：US20110199972A1

公开(公告)日：2011-08-18

申请号：US13026777

申请日：2011-02-14

申请人： Nirmal Chindhu Warke ,  Srinath Hosur ,  Martin J. Izzard ,  Siraj Akhtar ,  Baher S. Haroun ,  Marco Corsi

发明人： Nirmal Chindhu Warke ,  Srinath Hosur ,  Martin J. Izzard ,  Siraj Akhtar ,  Baher S. Haroun ,  Marco Corsi

IPC分类号： H04W40/00

CPC分类号： H04W40/00 ,  H01Q3/26 ,  H01Q9/20 ,  H01Q21/0006 ,  H01Q21/0037 ,  H04B7/0617 ,  H04B17/336 ,  H04L45/74 ,  H04L49/3009 ,  H04L49/40 ,  H04W40/06 ,  H04W40/12 ,  Y02D70/00 ,  Y02D70/166 ,  Y02D70/322 ,  Y02D70/34

摘要： Embodiments of the invention provide a system and method for chip to chip communications in electronic circuits. A router or switch receives data packets at input port ASICs. A routing table on the input port ASIC or on a routing ASIC is used to identify a destination port ASIC based upon header information in the data packet. The data packet is transmitted from the input port ASIC to the destination port ASIC using millimeter wave signals that are transmitted across a waveguide or a wireless interface.

摘要翻译： 本发明的实施例提供了一种用于电子电路中芯片到芯片通信的系统和方法。 路由器或交换机在输入端口ASIC处接收数据包。 输入端口ASIC或路由ASIC上的路由表用于根据数据包中的报头信息识别目标端口ASIC。 使用在波导或无线接口上传输的毫米波信号，将数据分组从输入端口ASIC发送到目标端口ASIC。

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。