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21. 发明授权

US08630374B2 Packet detection and coarse symbol timing for rotated differential M-ary PSK modulated preamble signal 有权
标题翻译：分组检测和用于旋转差分M-ary PSK调制前同步码信号的粗符号定时
公开(公告)号：US08630374B2
公开(公告)日：2014-01-14
申请号：US12881924
申请日：2010-09-14
申请人： June Chul Roh , Anuj Batra , Srinath Hosur
发明人： June Chul Roh , Anuj Batra , Srinath Hosur
IPC分类号： H03D3/22
CPC分类号： H04L27/227 , H04L7/042 , H04L7/10 , H04L27/2071 , H04L27/2078 , H04L2027/0038 , H04L2027/0095
摘要： A packet detection and coarse symbol timing recovery system for preamble signal modulated with rotated differential M-ary phase shift key (PSK) modulation includes a differential detection unit, to provide a symbol signal responsive to a received signal. A preamble sequence correlator performs a preamble sequence correlation on the symbol signal to produce a correlator signal. A metric calculation unit performs a metric calculation on the correlator signal to produce a metric. A packet detection unit determines that a packet is detected and produces a sample index. A coarse symbol timing unit finds a peak of the calculated metric signal outputs a sample index for the peak as coarse symbol timing information. The sample indexes are used in processing a physical layer convergence procedure (PLCP) header and physical layer service data unit (PSDU) block.
摘要翻译：用于利用旋转的差分M相移键（PSK）调制调制的前同步信号的分组检测和粗略符号定时恢复系统包括差分检测单元，以响应于接收到的信号提供符号信号。前序序列相关器在符号信号上执行前同步码序列相关，以产生相关器信号。度量计算单元对相关器信号执行度量计算以产生度量。分组检测单元确定检测到分组并产生样本索引。粗略符号定时单元发现所计算的度量信号的峰值将峰值的采样索引作为粗略符号定时信息输出。样本索引用于处理物理层收敛过程（PLCP）头和物理层服务数据单元（PSDU）块。

22. 发明授权

US08605568B2 PHY layer options for body area network (BAN) devices 有权
公开(公告)号：US08605568B2
公开(公告)日：2013-12-10
申请号：US12760510
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： H04B7/00 , H04J11/00
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 using M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK. Also, the PHY layer uses a constant symbol rate for BAN packet transmissions.

23. 发明授权

US08437245B2 Wireless network system 有权
标题翻译：无线网络系统
公开(公告)号：US08437245B2
公开(公告)日：2013-05-07
申请号：US12873086
申请日：2010-08-31
申请人： Timothy M. Schmidl , Anuj Batra , Srinath Hosur
发明人： Timothy M. Schmidl , Anuj Batra , Srinath Hosur
IPC分类号： H04J11/00 , H04J3/06
CPC分类号： H04L5/0048 , H04B7/12 , H04L5/0042
摘要： A integrated circuit includes logic configured to support smart-utility-network communication using an integer number of data bits per symbol for 96, 48, 24, 12, and 4 data subcarriers across IFFT sizes of 128, 64, 32, 16, and 8.
摘要翻译：集成电路包括被配置为支持智能公用事业网络通信，所述智能公用事业网络通信使用跨越128,64,32,16和8的IFFT大小的96,48,24,12和4个数据子载波的每符号的整数数据比特。

24. 发明申请

US20120045017A1 TRANSFORM-BASED SYSTEMS AND METHODS FOR RECONSTRUCTING STEERING MATRICES IN A MIMO-OFDM SYSTEM 审中-公开
标题翻译：基于变换的系统和用于重构MIMO-OFDM系统中的转向矩阵的方法
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。

25. 发明授权

US07889635B2 Versatile system for dual carrier transformation in orthogonal frequency division multiplexing 有权
标题翻译：用于正交频分复用的双载波变换的多功能系统
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。

26. 发明申请

US20070253499A1 Robust Detection of Packet Types 有权
标题翻译：分组类型的鲁棒检测
公开(公告)号：US20070253499A1
公开(公告)日：2007-11-01
申请号：US11618432
申请日：2006-12-29
申请人： Deric Wayne Waters , Srinath Hosur , Anuj Batra
发明人： Deric Wayne Waters , Srinath Hosur , Anuj Batra
IPC分类号： H04K1/10
CPC分类号： H04L27/0012 , H04L27/22 , H04L27/2647
摘要： Disclosed herein is a system and method for determining the presence of rotated-BPSK modulation. In addition, disclosed herein is a system and method for determining if a received packet is a Legacy, Mixed-Mode, or Green-Field packet in accordance with the determination of the presence of rotated-BPSK modulation. The presence of a Green-Field packet may be determined by detecting if additional tones are being excited in an LTF symbol of the received packet and/or if a SIG field symbol following the LTF symbol is modulated by rotated-BPSK. The presence of a Mixed-Mode packet may be determined by detecting if the first four bits of the SIG field symbol following the LTF symbol are [1 1 0 1] and/or detecting if a symbol following an L-SIG symbol is modulated by rotated-BPSK. The presence of a Legacy packet may be determined by detecting if the symbol following the L-SIG symbol is modulated by BPSK.
摘要翻译：本文公开了一种用于确定旋转BPSK调制的存在的系统和方法。此外，本文所公开的是根据确定旋转BPSK调制的确定来确定接收的分组是传统的，混合模式的还是绿色场分组的系统和方法。可以通过检测在接收到的分组的LTF符号中是否激励附加音调和/或如果通过旋转BPSK调制LTF符号之后的SIG字段符号，则可以确定绿场分组的存在。混合模式分组的存在可以通过检测LTF符号之后的SIG字段符号的前四位是否为[1×10 1]和/或检测在L-SIG符号之后的符号是否被旋转BPSK。可以通过检测L-SIG符号之后的符号是否被BPSK调制来确定遗留分组的存在。

27. 发明申请

US20050147022A1 Preamble transmit power tailoring system, a method of tailoring preamble transmit power and an OFDM transmitter employing the same 审中-公开
标题翻译：前导码发射功率调整系统，一种定制前导码发射功率的方法和采用它的OFDM发射机
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。

28. 发明授权

US08699471B2 System and method for scrambling and time-hopping 有权
标题翻译：用于加扰和跳时的系统和方法
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。

29. 发明授权

US08605770B2 Ultra wideband modulation for body area networks 有权
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.

30. 发明授权

US08488655B2 PHY layer parameters for body area network (BAN) devices 有权
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.

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