公开(公告)号：US08392781B2

公开(公告)日：2013-03-05

申请号：US12686929

申请日：2010-01-13

申请人： Anuj Batra ,  Deric W. Waters ,  Srinath Hosur

发明人： Anuj Batra ,  Deric W. Waters ,  Srinath Hosur

IPC分类号： G08C25/02 ,  H03M13/00

CPC分类号： H04L1/1812 ,  H04L1/188 ,  H04L1/1893

摘要： Embodiments of the invention provide a system and method of hybrid automatic repeat-request (HARQ) processing. A viterbi decoder is coupled to and follows a descrambler. After the signal has been de-scrambled, it can be stored in a memory in case it needs to be recombined with another packet. This means that the log-likelihood ratios LLRs for each transmitted bit are stored in memory using a finite number of bits (for example, between 4 and 12 bits). If the packet that is currently being processed contains retransmitted information, then the de-scrambled output stored from a previous packet containing the same information can be loaded and combined with the current packet.

摘要翻译： 本发明的实施例提供了一种混合自动重传请求（HARQ）处理的系统和方法。 维特比解码器耦合到并跟随解扰器。 在信号被解除加扰之后，如果需要与另一个数据包重新组合，则可将其存储在存储器中。 这意味着每个发送的比特的对数似然比LLRs使用有限数量的比特（例如，在4比特和12比特之间）存储在存储器中。 如果当前处理的分组包含重发信息，则可以将包含相同信息的先前分组存储的去加扰输出加载并与当前分组组合。

公开(公告)号：US08306139B2

公开(公告)日：2012-11-06

申请号：US12016921

申请日：2008-01-18

申请人： David L. Milliner ,  Deric W. Waters ,  Anuj Batra ,  Srinath Hosur

发明人： David L. Milliner ,  Deric W. Waters ,  Anuj Batra ,  Srinath Hosur

IPC分类号： H04B7/02

CPC分类号： H04L27/2601 ,  H04L25/0202

摘要： Systems and methods for providing multiple-input multiple-output (MIMO) detection, comprising a leaf node predictor for receiving a processed communications stream, computing at least one channel metric corresponding to the communications stream for a given channel realization, and generating at least one parameter corresponding to at least one predicted best leaf node candidate for the given channel realization. A MIMO engine receives the at least one parameter and enumerates at least one list of candidate vectors corresponding to the leaf nodes specified by the generated at least one parameter. Some embodiments simulate a MIMO detector over many channel realizations, track channel metric and parameter values used for each channel realization resulting from such simulating, and store, in a look-up table, best values of the tracked values used for a particular channel metric.

摘要翻译： 用于提供多输入多输出（MIMO）检测的系统和方法，包括用于接收经处理的通信流的叶节点预测器，为给定的信道实现计算对应于通信流的至少一个信道度量，以及生成至少一个 参数对应于给定信道实现的至少一个预测的最佳叶节点候选。 MIMO引擎接收所述至少一个参数，并且列举与由所生成的至少一个参数指定的叶节点相对应的候选向量的至少一个列表。 一些实施例通过许多信道实现来模拟MIMO检测器，跟踪信道度量和用于每个信道实现的参数值，由这样的模拟和存储在查找表中，用于特定信道度量的跟踪值的最佳值。

公开(公告)号：US20120045017A1

公开(公告)日：2012-02-23

申请号：US13286405

申请日：2011-11-01

申请人： Tarkesh Pande ,  Srinath Hosur ,  Anuj Batra

发明人： Tarkesh Pande ,  Srinath Hosur ,  Anuj Batra

IPC分类号： H04L27/00

CPC分类号： H04B7/0417 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/066 ,  H04L5/0023 ,  H04L25/0248 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03802

摘要： Embodiments provide a transform-based method for representing steering matrices in transmit beamforming for a multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system. Beamforming embodiments generate a transform-based representation of steering matrices for at least a subset of sub-carriers for which channel information is known. In some embodiments, a beamformer is able to receive transform matrices information for at least a subset of channel sub-carriers, and generate corresponding channel sub-carrier steering matrices. Some embodiments of a beamformee are able to map at least a subset of channel sub-carrier steering matrices to corresponding transform matrices information prior to transmitting the transform matrix information to a beamformer. Other embodiments of a beamformer are able to receive channel information for at least a subset of sub-carriers of a channel, and compute a transform-based representation of a steering matrix for each sub-carrier for which channel information is known.

摘要翻译： 实施例提供了一种用于表示多输入多输出正交频分复用（MIMO-OFDM）系统的发射波束成形中的导引矩阵的基于变换的方法。 波束形成实施例为已知信道信息的子载波的至少一个子集生成导向矩阵的基于变换的表示。 在一些实施例中，波束形成器能够接收用于信道子载波的至少子集的变换矩阵信息，并且生成相应的信道子载波导引矩阵。 在将变换矩阵信息发送到波束形成器之前，波束形成器的一些实施例能够将信道子载波导引矩阵的至少一个子集映射到对应的变换矩阵信息。 波束形成器的其他实施例能够接收信道的子载波的至少一个子集的信道信息，并且为已知信道信息的每个子载波计算导频矩阵的基于变换的表示。

公开(公告)号：US07961826B2

公开(公告)日：2011-06-14

申请号：US11928863

申请日：2007-10-30

申请人： Deric W. Waters ,  Oren Peles ,  Anuj Batra ,  Srinath Hosur ,  Doron Burshtein

发明人： Deric W. Waters ,  Oren Peles ,  Anuj Batra ,  Srinath Hosur ,  Doron Burshtein

IPC分类号： H04B7/10 ,  H04L1/02

CPC分类号： H04L25/03242 ,  H04L2025/03414 ,  H04L2025/03426

摘要： A Multiple-input Multiple-Output (MIMO) receiver is provided. The MIMO receiver comprises a parameterized sphere detector having two search modes. During a first search mode, the parameterized sphere detector enumerates a number of best candidate vectors up to a fixed parameter value. During a second search mode, the parameterized sphere detector enumerates additional candidate vectors using a greedy search until a predetermined number of candidate vectors have been enumerated.

摘要翻译： 提供多输入多输出（MIMO）接收机。 MIMO接收机包括具有两个搜索模式的参数化球体检测器。 在第一搜索模式期间，参数化球体检测器枚举多达一个固定参数值的最佳候选向量。 在第二搜索模式期间，参数化球体检测器使用贪婪搜索枚举附加候选向量，直到已经列举了预定数量的候选向量。

公开(公告)号：US07889635B2

公开(公告)日：2011-02-15

申请号：US12685404

申请日：2010-01-11

申请人： Jaiganesh Balakrishnan ,  Srinath Hosur ,  Anuj Batra

发明人： Jaiganesh Balakrishnan ,  Srinath Hosur ,  Anuj Batra

IPC分类号： H04J11/00

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：US20050147022A1

公开(公告)日：2005-07-07

申请号：US10744147

申请日：2003-12-22

申请人： Srinath Hosur ,  Srikanth Gummadi ,  Anuj Batra ,  Michael Polley

发明人： Srinath Hosur ,  Srikanth Gummadi ,  Anuj Batra ,  Michael Polley

IPC分类号： H04B7/005 ,  H04J11/00 ,  H04L27/26

CPC分类号： H04W52/325 ,  H04L27/2614 ,  H04L27/2626 ,  H04W52/367 ,  H04W52/52

摘要： A preamble transmit power tailoring system for use with an Orthogonal Frequency Division Multiplexing (OFDM) transmitter, a method of tailoring preamble transmit power, and an OFDM transmitter. In one embodiment, the preamble transmit power tailoring system includes (1) a peak power estimator configured to calculate, based on a payload to be transmitted by the OFDM transmitter and an associated transmit power limitation value, an available power headroom and (2) a preamble power enhancer, associated with the peak power estimator, configured to increase transmit power of at least a portion of a preamble for the payload subject to the available power headroom.

摘要翻译： 一种与正交频分复用（OFDM）发射机一起使用的前导码发射功率调整系统，一种定制前导码发送功率的方法和一种OFDM发射机。 在一个实施例中，前导码发射功率调整系统包括：（1）峰值功率估计器，被配置为基于要由OFDM发射机发射的有效载荷和相关联的发射功率限制值，计算可用的功率余量，以及（2） 与峰值功率估计器相关联的前导码功率增强器被配置为增加对可用功率余量的有效载荷的前导码的至少一部分的发射功率。

公开(公告)号：US08699471B2

公开(公告)日：2014-04-15

申请号：US13087848

申请日：2011-04-15

申请人： June Chul Roh ,  Anuj Batra ,  Srinath Hosur

发明人： June Chul Roh ,  Anuj Batra ,  Srinath Hosur

IPC分类号： H04J3/00

CPC分类号： H04B1/7176 ,  H04B2001/6908

摘要： A system and method for scrambling and time-hopping in an ultra-wideband wireless network. In one embodiment, a wireless device includes a symbol mapper and a dynamic chip scrambler. The dynamic chip scrambler is configured to scramble each of a plurality of consecutive bursts of a time-hopped packet according to a pseudo-random scrambling sequence that varies from burst to burst.

摘要翻译： 一种用于在超宽带无线网络中进行加扰和跳时的系统和方法。 在一个实施例中，无线设备包括符号映射器和动态芯片加扰器。 动态码片扰频器被配置为根据从突发到突发不同的伪随机扰频序列来对每个跳时间分组的连续脉冲串进行加扰。

公开(公告)号：US08605770B2

公开(公告)日：2013-12-10

申请号：US12702628

申请日：2010-02-09

申请人： June Chul Roh ,  Anuj Batra ,  Sudipto Chakraborty ,  Srinath Hosur

发明人： June Chul Roh ,  Anuj Batra ,  Sudipto Chakraborty ,  Srinath Hosur

IPC分类号： H04B1/00

CPC分类号： H04B1/69 ,  H04B1/7176 ,  H04B2001/6908

摘要： A symbol modulation system applicable to a body area network is disclosed herein. The symbol modulation system includes a symbol mapper. The symbol mapper is configured to determine a time within a predetermined symbol transmission interval at which a transmission representative of the symbol will occur. The time is determined based on a value of a symbol and a value of a time-hopping sequence. The time is selected from a plurality of symbol value based time slots, and a plurality of time-hopping sequence sub-time-slots within each symbol value based time slot. The symbol mapper is configured to generate a single guard interval within the symbol transmission interval. The single guard interval is positioned to terminate the symbol transmission interval.

公开(公告)号：US08488655B2

公开(公告)日：2013-07-16

申请号：US12760516

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： H04B1/40

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 transmit and receive data in a frequency band selected from the group consisting of: 402-405 MHz, 420-450 MHz, 863-870 MHz, 902-928 MHz, 950-956 MHz, 2360-2400 MHz, and 2400-2483.5 MHz.

公开(公告)号：US20130170587A1

公开(公告)日：2013-07-04

申请号：US13525283

申请日：2012-06-16

申请人： Deric Waters ,  Anuj Batra ,  Srinath Hosur

发明人： Deric Waters ,  Anuj Batra ,  Srinath Hosur

IPC分类号： H04B7/04

CPC分类号： H04B7/0413 ,  H04L25/0204 ,  H04L25/0242 ,  H04L25/0246

摘要： Systems comprising a leaf node predictor for receiving a processed communications stream, determining at least one channel metric corresponding to the communications stream for a given channel realization, and generating at least three instructions to output, which at least one instruction corresponds to at least one predicted best leaf node candidate for the given channel realization.

摘要翻译： 包括用于接收经处理的通信流的叶节点预测器的系统，确定与给定信道实现相关的通信流的至少一个信道度量，以及生成至少三个指令以输出，至少一个指令对应于至少一个预测的 给定通道实现的最佳叶节点候选。