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1.发明授权Time-switched preamble generator, method of generating and multiple-input, multiple-output communication system employing the generator and method 有权时间切换前导码生成器，生成和多输入方法，采用发生器和方法的多输出通信系统公开(公告)号：US07864661B2
公开(公告)日：2011-01-04
申请号：US10755603
申请日：2004-01-12
申请人： Srinath Hosur , Srikanth Gummadi , Anuj Batra , David P. Magee
发明人： Srinath Hosur , Srikanth Gummadi , Anuj Batra , David P. Magee
IPC分类号： H04J11/00
CPC分类号： H04W88/08
摘要： The present invention is directed to a time-switched preamble generator and method of generating a time-switched preamble for use with a multiple-input, multiple-output (MIMO) transmitter employing first and second transmit antennas. In one embodiment, the time-switched preamble generator includes an initial preamble formatter configured to provide a first preamble to the first transmit antenna and a second preamble to the second transmit antenna during an initial time interval. The time-switched preamble generator also includes a subsequent preamble formatter coupled to the initial preamble formatter and configured to provide the second preamble to the first transmit antenna and the first preamble to the second transmit antenna during a subsequent time interval.
摘要翻译： 本发明涉及一种时间切换前导码生成器和用于与采用第一和第二发射天线的多输入多输出（MIMO）发射机一起使用的时间切换前同步码的方法。 在一个实施例中，时间切换前导码生成器包括初始前同步码格式器，其被配置为在初始时间间隔期间向第一发射天线提供第一前同步码和第二前导码到第二发射天线。 时间切换前导码生成器还包括后续前导码格式器，其耦合到初始前导码格式化器并且被配置为在随后的时间间隔期间向第一发射天线提供第二前同步码和第一前导码到第二发射天线。
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2.发明授权Orthogonal preamble encoder, method of encoding orthogonal preambles and multiple-input, multiple-output communication system employing the same 有权正交前导编码器，正交前导码的编码方法和采用该正交前导码的多输入多输出通信系统公开(公告)号：US06917311B2
公开(公告)日：2005-07-12
申请号：US10639418
申请日：2003-08-11
申请人： Srinath Hosur , Anuj Batra , Srikanth Gummadi , David P. Magee
发明人： Srinath Hosur , Anuj Batra , Srikanth Gummadi , David P. Magee
CPC分类号： H04L1/0078 , H04B7/04 , H04L1/06 , H04L25/0204 , H04L25/022 , H04L25/0226 , H04L27/2613
摘要： For use with a multiple-input, multiple-output (MIMO) transmitter, an orthogonal preamble encoder, a method of encoding orthogonal preambles and a communication system incorporating the encoder or the method. In one embodiment, the encoder includes: (1) a preamble supplement generator configured to provide a first long sequence preamble supplement to a first transmit antenna of the MIMO transmitter and (2) a preamble supplement coordinator coupled to the preamble supplement generator and configured to provide a second long sequence preamble supplement to a second transmit antenna of the MIMO transmitter, at least a portion of the second long sequence preamble supplement being a negation of the first long sequence preamble supplement.
摘要翻译： 用于多输入多输出（MIMO）发射机，正交前导码编码器，对正交前导码进行编码的方法和结合编码器的通信系统或方法。 在一个实施例中，所述编码器包括：（1）前导码补充生成器，被配置为向所述MIMO发射机的第一发射天线提供第一长序列前导码补充，以及（2）前缀补充协调器，其耦合到所述前导码补充生成器， 向所述MIMO发射机的第二发射天线提供第二长序列前导码补充，所述第二长序列前同步码补码的至少一部分是所述第一长序列前同步码补码的否定。
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3.发明申请Time-switched preamble generator, method of generating and multiple-input, multiple-output communication system employing the generator and method 有权时间切换前导码生成器，生成和多输入方法，采用发生器和方法的多输出通信系统公开(公告)号：US20050153723A1
公开(公告)日：2005-07-14
申请号：US10755603
申请日：2004-01-12
申请人： Srinath Hosur , Srikanth Gummadi , Anuj Batra , David Magee
发明人： Srinath Hosur , Srikanth Gummadi , Anuj Batra , David Magee
CPC分类号： H04W88/08
摘要： The present invention is directed to a time-switched preamble generator and method of generating a time-switched preamble for use with a multiple-input, multiple-output (MIMO) transmitter employing first and second transmit antennas. In one embodiment, the time-switched preamble generator includes an initial preamble formatter configured to provide a first preamble to the first transmit antenna and a second preamble to the second transmit antenna during an initial time interval. The time-switched preamble generator also includes a subsequent preamble formatter coupled to the initial preamble formatter and configured to provide the second preamble to the first transmit antenna and the first preamble to the second transmit antenna during a subsequent time interval.
摘要翻译： 本发明涉及一种时间切换前导码生成器和用于与采用第一和第二发射天线的多输入多输出（MIMO）发射机一起使用的时间切换前同步码的方法。 在一个实施例中，时间切换前导码生成器包括初始前同步码格式器，其被配置为在初始时间间隔期间向第一发射天线提供第一前同步码和第二前导码到第二发射天线。 时间切换前导码生成器还包括后续前导码格式器，其耦合到初始前导码格式化器并且被配置为在随后的时间间隔期间向第一发射天线提供第二前同步码和第一前导码到第二发射天线。
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4.发明申请Preamble transmit power tailoring system, a method of tailoring preamble transmit power and an OFDM transmitter employing the same 审中-公开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
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。
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公开(公告)号：US20050035885A1
公开(公告)日：2005-02-17
申请号：US10639418
申请日：2003-08-11
申请人： Srinath Hosur , Anuj Batra , Srikanth Gummadi , David Magee
发明人： Srinath Hosur , Anuj Batra , Srikanth Gummadi , David Magee
CPC分类号： H04L1/0078 , H04B7/04 , H04L1/06 , H04L25/0204 , H04L25/022 , H04L25/0226 , H04L27/2613
摘要： For use with a multiple-input, multiple-output (MIMO) transmitter, an orthogonal preamble encoder, a method of encoding orthogonal preambles and a communication system incorporating the encoder or the method. In one embodiment, the encoder includes: (1) a preamble supplement generator configured to provide a first long sequence preamble supplement to a first transmit antenna of the MIMO transmitter and (2) a preamble supplement coordinator coupled to the preamble supplement generator and configured to provide a second long sequence preamble supplement to a second transmit antenna of the MIMO transmitter, at least a portion of the second long sequence preamble supplement being a negation of the first long sequence preamble supplement.
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6.发明授权Scalable time-switched preamble supplement generator, method of generating and multiple-input, multiple-output communication system employing the generator and method 有权可扩展时间切换前导码补充生成器，生成和多输入方法，采用发生器和方法的多输出通信系统公开(公告)号：US07382832B2
公开(公告)日：2008-06-03
申请号：US10903668
申请日：2004-07-30
CPC分类号： H04B7/04 , H04B7/0669 , H04B7/0671
摘要： The present invention provides a time-switched preamble supplement generator for use with a multiple-input, multiple-output (MIMO) transmitter employing N transmit antennas wherein N is at least two. In one embodiment, the time-switched preamble supplement generator includes an initial preamble supplement formatter configured to provide a first permutation of a set of preamble supplements to the N transmit antennas during an initial time interval. The first permutation includes a single first preamble supplement and at least one second preamble supplement. The time-switched preamble supplement generator also includes a subsequent preamble supplement formatter coupled to the initial preamble supplement formatter and configured to provide (N−1) mutually exclusive further permutations of the set to the N transmit antennas during (N−1) subsequent time intervals.
摘要翻译： 本发明提供了一种与使用N个发射天线的多输入多输出（MIMO）发射机一起使用的时间切换前导码补充生成器，其中N是至少两个。 在一个实施例中，时间切换前导码补充生成器包括初始前导码补充格式化器，被配置为在初始时间间隔期间向N个发射天线提供一组前导码补充的第一置换。 第一排列包括单个第一前序补码和至少一个第二前序补码。 所述时间切换前导码补充生成器还包括后续前导码补充格式化器，其耦合到所述初始前导码补充格式器，并且被配置为在（N-1）个后续时间期间向所述N个发射天线提供所述集合的（N-1）个互斥另外的排列 间隔
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公开(公告)号：US07382719B2
公开(公告)日：2008-06-03
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
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。
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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
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。
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公开(公告)号：US09900193B2
公开(公告)日：2018-02-20
申请号：US13566639
申请日：2012-08-03
申请人： Timothy Mark Schmidl , Srinath Hosur , Anuj Batra
发明人： Timothy Mark Schmidl , Srinath Hosur , Anuj Batra
CPC分类号： H04L27/0012 , H04L27/2613
摘要： A method of communicating in a wireless network including a plurality of nodes having communications devices including a first node, wherein at least one node utilizes a first physical layer (PHY) modulation, and at least one other node utilizes a second PHY modulation different from the first PHY modulation. The first node receives a PHY frame transmitted by one of the plurality of nodes, and identifies a PHY modulation type selected from the first PHY modulation and the second PHY modulation used in the PHY frame or to be used in a subsequently to be received PHY frame or frame portion. The first node decodes the PHY frame or the subsequently to be received PHY frame or frame portion using the PHY modulation type identified in the identifying step.
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公开(公告)号：US08054914B2
公开(公告)日：2011-11-08
申请号：US12022461
申请日：2008-01-30
申请人： Deric W. Waters , Anuj Batra , Srinath Hosur
发明人： Deric W. Waters , Anuj Batra , Srinath Hosur
CPC分类号： H04L27/2647 , H04L1/206
摘要： A method and system for estimating noise variance. A method for noise variance estimation comprises receiving a first multi-sample symbol and receiving a second multi-sample symbol. The first multi-sample symbol is subtracted from the second multi-sample symbol to produce a set of noise samples. The set of noise samples is used to produce a noise variance estimate. The noise variance estimate is applied in various tasks (e.g. channel estimation, log-likelihood ratio computation, and/or minimum mean squared error equalization) to process data provided to a user.
摘要翻译： 一种用于估计噪声方差的方法和系统。 一种用于噪声方差估计的方法包括接收第一多样本符号并接收第二多样本符号。 从第二多样本符号中减去第一多样本符号以产生一组噪声样本。 噪声样本集用于产生噪声方差估计。 在各种任务（例如信道估计，对数似然比计算和/或最小均方误差均衡）中应用噪声方差估计以处理提供给用户的数据。
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