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公开(公告)号：US08116260B1
公开(公告)日：2012-02-14
申请号：US09935069
申请日：2001-08-22
CPC分类号： H04B1/0475 , H04B7/0413 , H04B7/0669 , H04L5/0023 , H04L27/2626 , H04L27/2647 , H04W88/08
摘要： A wireless multiple-input multiple-output (MIMO) communication system includes signal simulcasting. Base stations include a plurality of transmit antennas and terminals include a plurality of receive antennas to form MIMO channels. In one embodiment, a simulcasting MIMO wireless communication system includes orthogonal frequency division multiplexing (OFDM). This arrangement achieves the spectral efficiency advantages of OFDM and simulcasting.
摘要翻译： 无线多输入多输出（MIMO）通信系统包括信号同步广播。 基站包括多个发射天线，并且终端包括多个接收天线以形成MIMO信道。 在一个实施例中，同时广播的MIMO无线通信系统包括正交频分复用（OFDM）。 这种安排实现了OFDM和同时播送的频谱效率优势。
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42.发明授权Method and apparatus for reducing interference in multiple-input-multiple-output (MIMO) systems 有权用于减少多输入多输出（MIMO）系统中的干扰的方法和装置公开(公告)号：US07912014B2
公开(公告)日：2011-03-22
申请号：US10255441
申请日：2002-09-26
IPC分类号： H04W4/00
CPC分类号： H04L25/067 , H04B7/04 , H04L1/06 , H04L25/0204 , H04L25/0212 , H04L25/0224
摘要： Interference is reduced with a multiple-input-multiple-output (MIMO) system having a set of basestations including a first basestation and a second basestation is reduced. Signals associated with the first basestation having its own antenna elements are received. The first basestation is associated with its own mobile stations each having their own antenna elements. Each signal associated with the first basestation is uniquely associated with a mobile station associated with the first basestation. Signals associated with the second basestation having its own antenna elements are received. The second basestation is associated with its own mobile stations each having their own antenna elements. Each signal associated with the second basestation is uniquely associated with a mobile station associated with the second basestation. Signals associated with the first basestation are jointly detected in conjunction with the signals associated with the second basestation to produce a set of detected signals.
摘要翻译： 通过具有一组基站的多输入多输出（MIMO）系统来减少干扰，所述基站包括第一基站，并且减少了第二基站。 接收与具有其自己的天线元件的第一基站相关联的信号。 第一个基站与其自己的移动站相关联，每个移动站具有它们自己的天线元素。 与第一基站相关联的每个信号与与第一基站相关联的移动站唯一地相关联。 接收与具有其自己的天线元件的第二基站相关联的信号。 第二个基站与其各自具有自己的天线元件的其自己的移动台相关联。 与第二基站相关联的每个信号与与第二基站相关联的移动站唯一地相关联。 与第一基站相关联的信号与与第二基站相关联的信号一起共同检测以产生一组检测到的信号。
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公开(公告)号：US07643404B2
公开(公告)日：2010-01-05
申请号：US11380531
申请日：2006-04-27
IPC分类号： H04J11/00
CPC分类号： H04L27/2601 , H04L1/0618
摘要： A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antennas. The received data is pre-whitened prior to maximum likelihood detection. In one embodiment, successive interference cancellation can be sued to improve system performance. Channel parameter estimation can be enhanced by weighting the channel impulse response estimates based upon a deviation from average.
摘要翻译： MIMO OFDM系统包括用于对具有独立时空码的各个数据块进行编码的多个时空编码器。 经变换的数据块信号由多个发射天线发射并由多个接收天线接收。 接收的数据在最大似然检测之前被预先白化。 在一个实施例中，可以起诉连续的干扰消除以改善系统性能。 可以通过基于偏离平均值的信道脉冲响应估计来加权信道参数估计。
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公开(公告)号：US06895253B1
公开(公告)日：2005-05-17
申请号：US08404406
申请日：1995-03-14
CPC分类号： H04B7/0408 , H01Q1/007 , H01Q3/26 , H04B7/24 , H04W16/28
摘要： A wireless communication system and method includes antenna arrays at both the transmitter and receiver having a plurality of elements for very high data rate communication. Phased array antennas or directive fixed beam antennas are used with a beamwidth in azimuth and elevation less than 30° to increase the power margin and to decrease the delay spread of signals at the receiver to permit wireless data communications at high data rates in closed environments, for example, bursty transmissions and isochronous communications. The wireless communication system is capable of data transmission rates which exceed 1 Gbps with propagation losses of up to at least 60 dB relative to one meter.
摘要翻译： 无线通信系统和方法包括在发射机和接收机两者上具有用于非常高数据速率通信的多个元件的天线阵列。 使用相控阵天线或指向固定波束天线，方位角和仰角的波束宽度小于30°，以增加功率余量，并减少接收机信号的延迟扩展，以允许在封闭环境中以高数据速率进行无线数据通信， 例如，突发传输和同步通信。 无线通信系统能够超过1Gbps的数据传输速率，相对于一米，传播损耗高达至少60dB。
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公开(公告)号：US06804312B1
公开(公告)日：2004-10-12
申请号：US09722897
申请日：2000-11-27
申请人： Moe Z. Win , Jack Harriman Winters
发明人： Moe Z. Win , Jack Harriman Winters
IPC分类号： H04B710
CPC分类号： H04B7/0874 , H04B7/0632 , H04B7/0691
摘要： The present invention provides techniques to determine an antenna selection and associated weights for a transmission system having multiple antennas. A receiver first samples signals received on each antenna and the channel characteristics for each received signal is calculated. The signal-to-interference-plus-noise (SINR) ratio for various combinations of antennas is estimated using the channel characteristics and a subset of antennas and accompanying weights are determined that can provide an advantageous SINR.
摘要翻译： 本发明提供了确定具有多个天线的传输系统的天线选择和相关权重的技术。 接收机首先对在每个天线上接收的信号进行采样，并计算每个接收信号的信道特性。 使用信道特性来估计各种天线组合的信号干扰加噪声（SINR）比，并且确定可以提供有利的SINR的天线子集和伴随权重。
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公开(公告)号：US06590533B2
公开(公告)日：2003-07-08
申请号：US10155380
申请日：2002-05-24
IPC分类号： G01S124
CPC分类号： H04W52/283 , G01S5/02 , H04W4/02 , H04W4/90 , H04W8/18 , H04W52/367 , H04W52/50 , H04W76/50
摘要： A method of locating a mobile telephone includes steps of receiving, transmitting, increasing and determining. In the receiving step, a first base station receives a call from a mobile telephone, the call including a dialed number and a TDMA signal. In the transmitting step, the base station transmits a control message to the mobile telephone when the dialed number meets a predetermined criterion, such as being 911. The control message instructs the mobile telephone to transmit the TDMA signal at a maximum power. In the increasing step, the mobile telephone increases the TDMA signal to maximum power in response to the control message. Then in the determining step, location information for the mobile telephone is determined based on at least one characteristic of the TDMA signal received at at least one of the first base station and other base stations. In an alternate embodiment, the method is practiced in a mobile telephone and the power level is automatically increased in response to the dialed number meeting a predetermined criterion.
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