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公开(公告)号：US07821915B2
公开(公告)日：2010-10-26
申请号：US12130368
申请日：2008-05-30
IPC分类号： H04J11/00
CPC分类号： H04L25/0228 , H04L27/2647
摘要： An apparatus and a method to track the channel response for subcarriers in an OFDM receiver for a packet of information that includes a known transmitted part. The receiver has a signal-to-tone transformer to determine subcarriers corresponding to a received packet. The method stores a function of an initial estimate of the channel response for a subcarrier, and accepts a pre-decision constellation point value that is a post channel correction using a first estimate of the channel response. The method includes: makes a decision using the pre-decision constellation point value, re-modulates the decision to form a post-decision constellation point value, and forms a complex valued product of the function of the first estimate for the subcarrier and the complex-valued ratio of the pre-decision and post-decision values. This complex valued product forms a measure of the current channel estimate to use for updating the stored quantity.
摘要翻译： 一种用于跟踪OFDM接收机中用于包括已知传输部分的信息分组的子载波的信道响应的装置和方法。 接收机具有信号到音调的变压器来确定与接收的分组相对应的子载波。 该方法存储子载波的信道响应的初始估计的函数，并且接收使用信道响应的第一估计的作为后信道校正的预决策星座点值。 该方法包括：使用预决策星座点值进行判定，重新调制决策以形成后决策星座点值，并形成子载波和复合体的第一估计函数的复值乘积 估价和决策后价值的比值。 该复值产品形成用于更新存储数量的当前通道估计值的度量。
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公开(公告)号：US20080232497A1
公开(公告)日：2008-09-25
申请号：US12130368
申请日：2008-05-30
CPC分类号： H04L25/0228 , H04L27/2647
摘要： An apparatus and a method to track the channel response for subcarriers in an OFDM receiver for a packet of information that includes a known transmitted part. The receiver has a signal-to-tone transformer to determine subcarriers corresponding to a received packet. The method stores a function of an initial estimate of the channel response for a subcarrier, and accepts a pre-decision constellation point value that is a post channel correction using a first estimate of the channel response. The method includes: makes a decision using the pre-decision constellation point value, re-modulates the decision to form a post-decision constellation point value, and forms a complex valued product of the function of the first estimate for the subcarrier and the complex-valued ratio of the pre-decision and post-decision values. This complex valued product forms a measure of the current channel estimate to use for updating the stored quantity.
摘要翻译： 一种用于跟踪OFDM接收机中用于包括已知传输部分的信息分组的子载波的信道响应的装置和方法。 接收机具有信号到音调的变压器来确定与接收的分组相对应的子载波。 该方法存储子载波的信道响应的初始估计的函数，并且接收使用信道响应的第一估计的作为后信道校正的预决策星座点值。 该方法包括：使用预决策星座点值进行判定，重新调制决策以形成后决策星座点值，并形成子载波和复合体的第一估计函数的复值乘积 估价和决策后价值的比值。 该复值产品形成用于更新存储数量的当前通道估计值的度量。
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公开(公告)号：US07397758B1
公开(公告)日：2008-07-08
申请号：US10807547
申请日：2004-03-22
CPC分类号： H04L25/0228 , H04L27/2647
摘要： An apparatus and a method to estimate the channel response for a set of subcarriers in an OFDM receiver. The receiver receives a packet of information that includes a known transmitted part having known subcarrier values, and includes a signal-to-tone transformer to determine the subcarriers of a signal corresponding to a received packet. For each subcarrier, the method stores a function of an initial estimate of the channel response for the subcarrier, and accepts a post-channel correction pre-decision constellation point value for the subcarrier. The method further includes making a decision using the pre-decision constellation point value, re-modulating the decision to form a post-decision constellation point value, and forming a complex valued product of the function of the first estimate for the subcarrier and the complex-valued ratio of the pre-decision and post-decision values to forms a measure of the current channel estimate to use for updating the stored quantity.
摘要翻译： 一种用于估计OFDM接收机中的一组子载波的信道响应的装置和方法。 接收机接收包括具有已知子载波值的已知发射部分的信息分组，并且包括信号到音调变换器以确定与接收到的分组相对应的信号的子载波。 对于每个子载波，该方法存储子载波的信道响应的初始估计的函数，并且接收用于子载波的信道后校正预决定星座点值。 该方法还包括使用预决定星座点值进行判定，重新调制决定以形成后决定星座点值，以及形成子载波和复合物的第一估计的函数的复值乘积 预判定值和后决定值的估值比率，以形成用于更新存储数量的当前信道估计值的度量。
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公开(公告)号：US07352688B1
公开(公告)日：2008-04-01
申请号：US10335500
申请日：2002-12-31
申请人： Eldad Perahia , Bretton Douglas , David Pignatelli
发明人： Eldad Perahia , Bretton Douglas , David Pignatelli
IPC分类号： H04J11/00
CPC分类号： H04L27/2655 , H04B7/0413 , H04B7/10 , H04L5/0023 , H04L5/0048 , H04L25/0202 , H04L25/0226
摘要： A specialized preamble is provided to facilitate matrix channel estimation of a MIMO channel. In a particular implementation, a channel training preamble provided by the IEEE 802.11a standard is modified to facilitate MIMO channel estimation.
摘要翻译： 提供专用前置码以便于MIMO信道的矩阵信道估计。 在特定实现中，由IEEE 802.11a标准提供的信道训练前导码被修改以便于MIMO信道估计。
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公开(公告)号：US07301924B1
公开(公告)日：2007-11-27
申请号：US10197300
申请日：2002-07-15
申请人： Ozgur Gurbuz , David Pignatelli , David Stephenson , Eldad Perahia , Bretton Douglas , Ender Ayanoglu
发明人： Ozgur Gurbuz , David Pignatelli , David Stephenson , Eldad Perahia , Bretton Douglas , Ender Ayanoglu
CPC分类号： H04B7/0689 , H04B7/0413 , H04B7/0628 , H04B7/0871 , H04W28/22 , H04W84/12
摘要： The MAC layer of a wireless communication standard is modified to facilitate MIMO (multiple input multiple output) processing and thereby increase capacity and/or spectral efficiency. In one implementation, the IEEE 802.11a standard is modified in this way. A contention free period (CFP) is divided between MIMO communications and non-MIMO communications. An access point may maintain a list of nodes operating in MIMO mode and nodes operating in non-MIMO mode.
摘要翻译： 修改无线通信标准的MAC层以促进MIMO（多输入多输出）处理，从而增加容量和/或频谱效率。 在一个实现中，以这种方式修改IEEE 802.11a标准。 无竞争时段（CFP）在MIMO通信和非MIMO通信之间划分。 接入点可以保持在MIMO模式下操作的节点列表以及以非MIMO模式工作的节点。
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公开(公告)号：US20070230373A1
公开(公告)日：2007-10-04
申请号：US11395363
申请日：2006-03-31
申请人： Qinghua Li , Xintian Lin , Adrian Stephens , Keith Holt , Eldad Perahia
发明人： Qinghua Li , Xintian Lin , Adrian Stephens , Keith Holt , Eldad Perahia
IPC分类号： H04L12/16
CPC分类号： H04B7/0447 , H04B7/0417 , H04B7/0617 , H04B7/0626 , H04B7/0632 , H04B7/0634 , H04B7/0636 , H04B7/0643
摘要： Schemes are disclosed for efficiently training MIMO channels in wireless networks. In at least one embodiment, multiple STAs in a network may share a single channel sounding packet to develop corresponding beamforming matrices or CSI.
摘要翻译： 公开了用于有效训练无线网络中的MIMO信道的方案。 在至少一个实施例中，网络中的多个STA可以共享单个信道探测分组以开发相应的波束形成矩阵或CSI。
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127.发明授权Downlink transmission and reception techniques for a processing communication satellite 有权用于处理通信卫星的下行链路传输和接收技术公开(公告)号：US06512749B1
公开(公告)日：2003-01-28
申请号：US09408041
申请日：1999-09-29
IPC分类号： H04B7185
CPC分类号： H04B7/18515
摘要： Communication satellite downlink transmitting and reception techniques includes circuitry which groups a predetermined number of data cells with a predetermined error correction code to generate frame bodies. The circuitry also groups the frame bodies with header symbols and trailer symbols to generate data frames. One or more modulators enable the placement of the modulated data frames into a plurality of frequency bands having a predetermined frequency range and a predetermined transmission rate. One or more antennas transmit the modulated data frames over one or more beams with different forms of polarization to other antennas. A demodulator is connected to demodulate the radio carrier signals and the beams into data frames from a plurality of frequency bands. Decoders are connected to decode the frame bodies with header symbols and with trailer symbols from the data frames and to decode four data cells as a group by using a predetermined error correction code.
摘要翻译： 通信卫星下行链路发射和接收技术包括以预定的纠错码对预定数量的数据信元进行分组以产生帧体的电路。 电路还将帧体与头部符号和尾部符号分组以产生数据帧。 一个或多个调制器使得能够将经调制的数据帧放置在具有预定频率范围和预定传输速率的多个频带中。 一个或多个天线将具有不同形式的偏振的一个或多个波束上的经调制的数据帧发射到其他天线。 连接解调器，将无线电载波信号和波束解调成来自多个频带的数据帧。 连接解码器以用头部符号和来自数据帧的尾标符号对帧体进行解码，并通过使用预定的纠错码将四个数据信元解码为一组。
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128.发明授权Uplink transmission and reception techniques for a processing satelliteation satellite 有权用于处理卫星卫星的上行链路传输和接收技术公开(公告)号：US06466569B1
公开(公告)日：2002-10-15
申请号：US09408331
申请日：1999-09-29
IPC分类号： H04Q1104
CPC分类号： H04B7/18513
摘要： Uplink transmission and reception techniques for a processing satellite including one or more earth terminals 400 connected to receive ATM data cells. One or more encoders 418 are connected to coordinate four data cells with an error correction code to generate data bursts and to coordinate the data bursts with synchronizing bursts to generate data frames. One or more modulators 420 are connected to modulate the data frames by frequency division multiple access modulation to enable placement of the modulated data frames into a plurality of channels. One or more antennas 406 transmit the modulated data frames to a satellite 100 over 48 beams with various forms of polarization. In satellite 100, a receiving multibeam antenna and feed 106 responds to one or more beams of radiocarrier signals having one or more forms of polarization. One or more demodulators 138 demodulate the radio carrier signals into data frames from various channels including a plurality of channel types. One or more decoders 146 decode data bursts and synchronizing bursts from the data frames and decode four data cells from the bursts using error correction code.
摘要翻译： 用于包括连接到接收ATM数据单元的一个或多个接地端子400的处理卫星的上行链路传输和接收技术。 连接一个或多个编码器418以配置具有纠错码的四个数据单元，以产生数据脉冲串，并且以同步脉冲串协调数据脉冲以产生数据帧。 连接一个或多个调制器420以通过频分多址调制来调制数据帧，以便将调制的数据帧放置在多个信道中。 一个或多个天线406通过具有各种形式的偏振的48个波束将经调制的数据帧发射到卫星100.在卫星100中，接收多波束天线和馈送106响应于具有一个或多个形式的极化的一个或多个无线电载波信号波束 。 一个或多个解调器138将无线电载波信号解调为包括多个信道类型的各种信道的数据帧。 一个或多个解码器146解码数据突发并且从数据帧中同步脉冲串，并使用纠错码从脉冲串中解码四个数据信元。
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公开(公告)号：US6088416A
公开(公告)日：2000-07-11
申请号：US63799
申请日：1998-04-21
CPC分类号： H04B7/2041
摘要： A method for reducing interference and increasing spectral efficiency in a frequency reuse pattern (600) is disclosed. The method includes the steps of generating n original communications beams (302-308) assigned to substantially non-overlapping frequency bands, with the original communications beams extending over a first set of predetermined bandwidths. The method also generates n shifted communications beams (402-408) shifted by an orthogonal frequency separation from the n original communications beams (302-308), with the n shifted communications beams (402-408) extending over a second set of predetermined bandwidths. The method projects the n original communications beams (302-308) and the n shifted communications beams (402-408) in a frequency reuse pattern (600) over a region of interest by alternating the n original communications beams (302-308) with the n shifted communications beams (402-408).
摘要翻译： 公开了一种用于减少频率复用模式（600）中的干扰并提高频谱效率的方法。 该方法包括产生分配给基本上非重叠频带的n个原始通信波束（302-308）的步骤，原始通信波束在第一组预定带宽上延伸。 该方法还生成从N个原始通信波束（302-308）移位正交频率分离的n个移位通信波束（402-408），其中n个移位通信波束（402-408）在第二组预定带宽 。 该方法通过将n个原始通信波束（302-308）交替设置，在n个原始通信波束（302-308）和n个移动的通信波束（402-408）中以频率重用模式（600）在所关注的区域上投射， n个移位的通信波束（402-408）。
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公开(公告)号：US20140349669A1
公开(公告)日：2014-11-27
申请号：US14014630
申请日：2013-08-30
申请人： Emily Qi , Eldad Perahia
发明人： Emily Qi , Eldad Perahia
CPC分类号： H04W16/14
摘要： The present disclosure relates to computer-implemented systems and methods for wireless communication in radar transmission channels. The method may include receiving, by a first computer comprising one or more processors from a second computer, a request to initiate wireless communication, the first computer in communication with a wireless access point. Additionally, the method may include determining, by the first computer, that the wireless access point is communicating in a radar transmission channel. Further still, the method may include establishing wireless peer-to-peer communication between the first computer and the second computer in the radar transmission channel.
摘要翻译： 本公开涉及用于雷达传输信道中的无线通信的计算机实现的系统和方法。 该方法可以包括由包括来自第二计算机的一个或多个处理器的第一计算机接收发起无线通信的请求，第一计算机与无线接入点通信。 另外，该方法可以包括由第一计算机确定无线接入点正在雷达传输信道中进行通信。 此外，该方法还可以包括在雷达传输信道中的第一计算机和第二计算机之间建立无线对等通信。
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