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公开(公告)号：US07477698B2
公开(公告)日：2009-01-13
申请号：US11205504
申请日：2005-08-16
申请人： Shashidhar Vummintala , Arogyaswami Paulraj , Erik D. Lindskog , Balaji S. Rajan , Djordje Tujkovic
发明人： Shashidhar Vummintala , Arogyaswami Paulraj , Erik D. Lindskog , Balaji S. Rajan , Djordje Tujkovic
IPC分类号： H04B7/02
CPC分类号： H04L1/0606 , H04L1/0071 , H04L1/0618
摘要： Signal encoding in a multiple input multiple output system in a wireless communication network is provided. The communication system provides a method of encoding and transmitting symbols in a rate-2 complex symbol per second per Hertz transmission system that achieves a maximum diversity of four for a four transmit antenna system and a diversity of three on a three transmit antenna system. The communication system further provides a method of interleaving the complex symbols such that each interleaved symbol comprises information of at least two complex symbols where the complex symbols obtain values from a rotated constellation.
摘要翻译： 提供了在无线通信网络中的多输入多输出系统中的信号编码。 通信系统提供了一种以Hertz传输系统每秒的速率2复数符号进行编码和传输符号的方法，其对于四个发射天线系统实现四个最大分集，在三个发射天线系统上实现三分之一。 通信系统还提供了一种对复数符号进行交织的方法，使得每个交错符号包括复数符号从旋转星座获得值的至少两个复符号的信息。
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公开(公告)号：US07586997B2
公开(公告)日：2009-09-08
申请号：US11205505
申请日：2005-08-16
申请人： Shashidhar Vummintala , Arogyaswami Paulraj , Erik D. Lindskog , Balaji S. Rajan , Djordje Tujkovic
发明人： Shashidhar Vummintala , Arogyaswami Paulraj , Erik D. Lindskog , Balaji S. Rajan , Djordje Tujkovic
IPC分类号： H04L27/00
CPC分类号： H04L1/0625 , H04B7/0678 , H04L1/0071 , H04L1/0668 , H04L27/3472
摘要： A communication system is provided that includes signal encoding in a multiple input multiple output system. The communication system includes wireless communication networks. The communication system includes methods of encoding and transmitting symbols in a rate-1 complex symbol per second per Hertz transmission system while achieving maximum diversity. The communication further includes methods of interleaving the complex symbols such that each interleaved symbol comprises information of at least two complex symbols where the complex symbols obtain values from a rotated constellation.
摘要翻译： 提供了一种在多输入多输出系统中包括信号编码的通信系统。 通信系统包括无线通信网络。 通信系统包括以每赫兹传输系统每秒速率1复数符号编码和传输符号的方法，同时实现最大分集。 该通信还包括对复数符号进行交织的方法，使得每个交错符号包括复数符号从旋转星座获得值的至少两个复符号的信息。
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3.发明授权External correction of errors between traffic and training in a wireless communications system 有权无线通信系统中业务与培训之间的错误的外部校正公开(公告)号：US07221699B1
公开(公告)日：2007-05-22
申请号：US10186475
申请日：2002-06-28
申请人： Erik D. Lindskog
发明人： Erik D. Lindskog
IPC分类号： H04L27/30
CPC分类号： H04L25/0214 , H04B2201/70701 , H04L25/0228 , H04L25/03038 , H04L2025/03477
摘要： A method and apparatus are provided that allows a training and traffic signal to be compensated for phase errors without modifying a receiver. In one embodiment, the invention encompasses an external error correction circuit having a signal input to receive training and traffic channel signals from a receive chain, a signal processing circuit to compute phase corrections to at least one of the training and traffic channel signals, and a signal generator to supply a compensation signal to effect the computed correction.
摘要翻译： 提供了一种方法和装置，其允许在不修改接收器的情况下补偿相位误差的训练和交通信号。 在一个实施例中，本发明包括外部纠错电路，其具有用于接收来自接收链的训练和业务信道信号的信号输入，用于计算至少一个训练和业务信道信号的相位校正的信号处理电路，以及 信号发生器提供补偿信号以实现计算的校正。
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4.发明授权公开(公告)号：US06747594B2
公开(公告)日：2004-06-08
申请号：US10294948
申请日：2002-11-14
IPC分类号： G01S740
CPC分类号： H04B7/12 , H01Q3/267 , H04B7/0613 , H04B7/0837 , H04B17/12 , H04B17/21
摘要： A method and apparatus are provided that determine a frequency dependent calibration vector for a set of transmit or receive chains of a radio communications system using only differential phase and amplitude between the transmit chains and the receive chains, respectively. In one embodiment, the invention includes an antenna array adapted to transmit and receive radio communications signals with a plurality of other terminals, a transmit chain to transmit a calibration signal through the antenna array to a transponder on at least two different frequency bands, and a receive chain to receive through the antenna array a transponder signal from the transponder, the transponder signal being received on at least two different frequency bands and being based on the calibration signal. A signal processor determines a frequency dependent calibration vector based on the at least two frequency bands of the transponder signal as received through the receive chain by comparing relative characteristics for the transponder signal at a first one of the at least two frequencies to relative characteristics for the transponder signal at a second one of the at least two frequencies.
摘要翻译： 提供了一种方法和装置，其分别仅使用发射链和接收链之间的差分相位和幅度来确定无线电通信系统的一组发射或接收链的频率相关校准矢量。 在一个实施例中，本发明包括适于与多个其他终端发送和接收无线电通信信号的天线阵列，通过天线阵列将校准信号发射到至少两个不同频带上的应答器的发射链，以及 接收链，以通过天线阵列接收来自应答器的应答器信号，应答器信号在至少两个不同频带上被接收并且基于校准信号。 信号处理器基于通过接收链接收的应答器信号的至少两个频带来确定与频率相关的校准矢量，通过将在至少两个频率中的第一个频率上的应答器信号的相对特性相对于 在所述至少两个频率中的第二个频率处的应答器信号。
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5.发明授权Resolving user-specific narrow beam signals using a known sequence in a wireless communications system with a common pilot channel 有权在具有公共导频信道的无线通信系统中使用已知序列来解决用户特定的窄波束信号公开(公告)号：US07263082B1
公开(公告)日：2007-08-28
申请号：US10186553
申请日：2002-06-28
申请人： Erik D. Lindskog
发明人： Erik D. Lindskog
CPC分类号： H04B7/0691 , H04L7/042 , H04L25/0206 , H04L25/023
摘要： A method and apparatus are provided that corrects for differences in reception between a user-specific signal and a common signal. In one embodiment, the invention includes receiving a common pilot signal transmitted on a wide beam at a remote terminal, receiving a user-specific signal transmitted on a directed narrow beam at the remote terminal, demodulating the user-specific signal using the common pilot signal for channel estimation, estimating a phase error in the demodulated user-specific signal using known symbols in the user-specific signal, and correcting for the phase error in the demodulated user-specific signal using the phase error estimates.
摘要翻译： 提供了一种校正用户特定信号和公共信号之间的接收差异的方法和装置。 在一个实施例中，本发明包括接收在远程终端上在宽波束上发送的公共导频信号，接收在远程终端上的定向窄波束上发送的用户特定信号，使用公共导频信号解调用户特定信号 对于信道估计，使用用户特定信号中的已知符号估计解调的用户特定信号中的相位误差，并且使用相位误差估计来校正解调的用户特定信号中的相位误差。
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6.发明授权Combined open and closed loop beam forming in a multiple array radio communication system 失效在多阵列无线电通信系统中组合开和闭环波束形成公开(公告)号：US06865377B1
公开(公告)日：2005-03-08
申请号：US10187036
申请日：2002-06-28
CPC分类号： H04B7/0634 , H04B7/0617 , H04B7/0632
摘要： A method and apparatus are provided that can combine the benefits of beamforming with transmit diversity. In one embodiment, the invention includes sampling a signal received from a remote radio at elements of an antenna array, deriving spatial parameters for transmitting a signal to the remote radio from an antenna array, sampling the signal received from the remote radio at elements of at least one additional antenna array, and deriving spatial parameters for transmitting a signal to the remote radio from the at least one additional antenna array. The invention further includes generating diversity parameters for transmitting a signal to the remote radio using each antenna array as an element of a diversity array, and transmitting a signal to the remote radio using the spatial parameters and the diversity parameters.
摘要翻译： 提供了一种可以将波束成形与发射分集的优点组合的方法和装置。 在一个实施例中，本发明包括对从天线阵列的元件的远程无线电接收的信号进行采样，导出用于从天线阵列向远程无线电发送信号的空间参数， 至少一个附加天线阵列，以及导出用于从所述至少一个附加天线阵列向远程无线电发送信号的空间参数。 本发明还包括生成用于使用每个天线阵列作为分集阵列的元件将信号发送到远程无线电的分集参数，以及使用空间参数和分集参数将信号发送到远程无线电装置。
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7.发明授权Time-reversal block transmit diversity system for channels with intersymbol interference and method 失效具有符号间干扰和方法的信道的时间反向块发射分集系统公开(公告)号：US07272192B2
公开(公告)日：2007-09-18
申请号：US09833543
申请日：2001-04-11
CPC分类号： H04B7/0669 , H04L1/0618
摘要： A method for diversity transmission and reception for channels with intersymbol interference is created. With this method one can transmit from two or more antennas in such a way that a receiver with one or more antennas can benefit from the diversity offered by the difference in channels from the transmit antennas to the receiver antenna(s). The way the transmission and reception is organized makes it relatively simple to in the receiver detect the transmitted symbols despite intersymbol interference in the channel. Due to the increased diversity experienced by the receiver the average power level required at the receiver is reduced which can be used to increase the capacity or coverage of a wireless network and/or reduce the required transmitted power.
摘要翻译： 创建了具有符号间干扰的信道的分集发送和接收的方法。 利用这种方法，可以以这样的方式从两个或更多个天线发送，使得具有一个或多个天线的接收机可以从由发射天线到接收机天线的信道差异提供的分集中受益。 组播发送和接收的方式使得在接收机中检测发送的符号，尽管信道中存在码间干扰，但相对简单。 由于接收机经受的增加的分集，减少了接收机所需的平均功率电平，这可以用于增加无线网络的容量或覆盖范围，和/或减少所需的发射功率。
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公开(公告)号：US07039016B1
公开(公告)日：2006-05-02
申请号：US09967127
申请日：2001-09-28
IPC分类号： H04Q7/34
摘要： A method and apparatus are provided that calibrate a wideband radio communications system without causing significant interference with simultaneous users of the system. In one embodiment, the invention includes an antenna array adapted to transmit and receive radio communications signals with a plurality of other terminals the communications signals each using a particular minimum bandwidth. A transmit chain transmits a calibration signal through the antenna array to a transponder, and a receive chain receives through the antenna array a transponder signal from the transponder, the transponder signal being based on the calibration signal and having a bandwidth narrower than the minimum bandwidth. A signal processor measures characteristics of the transponder signal as received through the receive chain. These can be used to determine spatial signatures and to calibrate the transmit chain and the receive chain.
摘要翻译： 提供了一种校准宽带无线电通信系统而不对系统的同时用户造成显着干扰的方法和装置。 在一个实施例中，本发明包括天线阵列，其适于与多个其他终端发送和接收每个使用特定最小带宽的通信信号的无线电通信信号。 发射链通过天线阵列将校准信号发送到应答器，并且接收链通过天线阵列接收来自应答器的应答器信号，应答器信号基于校准信号并且具有比最小带宽窄的带宽。 信号处理器测量通过接收链接收的应答器信号的特性。 这些可用于确定空间签名并校准传输链和接收链。
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9.发明授权Estimation of downlink transmission parameters in a radio communications system with an adaptive antenna array 失效具有自适应天线阵列的无线电通信系统中下行链路传输参数的估计公开(公告)号：US06738020B1
公开(公告)日：2004-05-18
申请号：US10153515
申请日：2002-05-21
IPC分类号： H01Q300
CPC分类号： H04B7/0634 , H01Q3/2605 , H04B7/0643 , H04W52/42
摘要： A method and apparatus are provided that allows system calibration to be incorporated into a single function that also derives transmit parameters from receive parameters in a spatial diversity system. In one embodiment, the invention includes receiving signals at an antenna array from a plurality of different locations, deriving characterizations of the spatial parameters of the received signals, receiving measurements of a plurality of different signals transmitted from the antenna array to a plurality of different locations, deriving characterizations of the spatial parameters of the transmitted signals from the received measurements, and generating a transformation function for producing transmit spatial parameters based on measurements of received signals using the receive spatial parameter characterizations and the transmit spatial parameter characterizations.
摘要翻译： 提供了一种方法和装置，其允许系统校准被并入单个功能，其也从空间分集系统中的接收参数导出发射参数。 在一个实施例中，本发明包括从多个不同位置在天线阵列处接收信号，导出接收信号的空间参数的表征，接收从天线阵列发送到多个不同位置的多个不同信号的测量值 从接收到的测量中导出所发射信号的空间参数的特性，以及基于使用接收空间参数表征和传输空间参数表征的接收信号的测量来生成用于产生发射空间参数的变换函数。
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10.发明授权公开(公告)号：US06570527B1
公开(公告)日：2003-05-27
申请号：US09967258
申请日：2001-09-28
IPC分类号： G01S740
CPC分类号： H04B7/12 , H01Q3/267 , H04B7/0613 , H04B7/0837 , H04B17/12 , H04B17/21
摘要： A method and apparatus are provided that determine a frequency dependent calibration vector for a set of transmit or receive chains of a radio communications system using only differential phase and amplitude between the transmit chains and the receive chains, respectively. In one embodiment, the invention includes an antenna array adapted to transmit and receive radio communications signals with a plurality of other terminals, a transmit chain to transmit a calibration signal through the antenna array to a transponder on at least two different frequency bands, and a receive chain to receive through the antenna array a transponder signal from the transponder, the transponder signal being received on at least two different frequency bands and being based on the calibration signal. A signal processor determines a frequency dependent calibration vector based on the at least two frequency bands of the transponder signal as received through the receive chain by comparing relative characteristics for the transponder signal at a first one of the at least two frequencies to relative characteristics for the transponder signal at a second one of the at least two frequencies.
摘要翻译： 提供了一种方法和装置，其分别仅使用发射链和接收链之间的差分相位和幅度来确定无线电通信系统的一组发射或接收链的频率相关校准矢量。 在一个实施例中，本发明包括适于与多个其他终端发送和接收无线电通信信号的天线阵列，通过天线阵列将校准信号发射到至少两个不同频带上的应答器的发射链，以及 接收链，以通过天线阵列接收来自应答器的应答器信号，应答器信号在至少两个不同频带上被接收并且基于校准信号。 信号处理器基于通过接收链接收的应答器信号的至少两个频带来确定与频率相关的校准矢量，通过将在至少两个频率中的第一个频率上的应答器信号的相对特性相对于 在所述至少两个频率中的第二个频率处的应答器信号。
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