公开(公告)号：US06904097B2

公开(公告)日：2005-06-07

申请号：US09871833

申请日：2001-06-01

申请人： Gregory Agami ,  Robert John Corke ,  Ron Rotstein

发明人： Gregory Agami ,  Robert John Corke ,  Ron Rotstein

IPC分类号： H04L1/00 ,  H04L27/34 ,  H04L23/02 ,  H04L5/12

CPC分类号： H04L27/3461 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0069 ,  H04L1/0072 ,  H04L1/0086 ,  H04L25/067 ,  H04L27/38

摘要： A method and apparatus to adaptively puncture bits within QAM modulated data symbols transmitted in a communication system in order to effect a signaling channel. The method and apparatus utilize inherent characteristics of a particular mapping scheme for the QAM constellation to selectively puncture particular bits within a data symbol with signaling information and predetermined binary values to selectively increase the log-likelihood ratio gains of those particular bits punctured with the signaling information. The log-likelihood ratios are used to obtain the signaling information and, thus, increasing the gain of the log-likelihood ratios affords greater reliability for the signaling information without increasing the required system resources.

摘要翻译： 一种在通信系统中自适应地穿透QAM调制数据符号内的比特以便实现信令信道的方法和装置。 该方法和装置利用QAM星座图的特定映射方案的固有特性来选择性地使用信令信息和预定二进制值对数据符号内的特定比特进行穿孔，以选择性地增加用信令信息打破的那些特定比特的对数似然比增益 。 对数似然比用于获得信令信息，因此增加对数似然比的增益可以提供信令信息的更高的可靠性，而不增加所需的系统资源。

公开(公告)号：US06834088B2

公开(公告)日：2004-12-21

申请号：US09804585

申请日：2001-03-12

申请人： Gregory Agami ,  Robert John Corke ,  Ron Rotstein

发明人： Gregory Agami ,  Robert John Corke ,  Ron Rotstein

IPC分类号： H04L512

CPC分类号： H04L27/38 ,  H04L25/067

摘要： A method and apparatus to efficiently calculate log-likelihood ratios for each bit within M-ary QAM modulated symbols transmitted in a communication system. The method and apparatus utilize characteristics of square Karnaugh mapping of the QAM symbol constellation in order to reduce the number of distance calculations needed to determine the log-likelihood ratios for each of the bits within a demodulated symbol. The reduction in the number of calculations affords significant reduction in the time needed to determine log-likelihood ratios, especially for higher order M-ary QAM systems.

摘要翻译： 一种用于在通信系统中发送的M-ary QAM调制符号内的每个比特有效地计算对数似然比的方法和装置。 该方法和装置利用QAM符号星座的平方Karnaugh映射的特征，以便减少确定解调符号内的每个位的对数似然比所需的距离计算的数量。 计算次数的减少大大减少了确定对数似然比所需的时间，特别是对于较高阶的M系QAM系统。

公开(公告)号：US06324206B1

公开(公告)日：2001-11-27

申请号：US09511228

申请日：2000-02-23

申请人： Ron Rotstein ,  Yuda Yehuda Luz ,  Robert John Corke

发明人： Ron Rotstein ,  Yuda Yehuda Luz ,  Robert John Corke

IPC分类号： H04L2730

CPC分类号： H04J13/0048 ,  H04B1/707 ,  H04L5/026 ,  H04L27/2626

摘要： A current mode of operation is provided to a Walsh spreader (203), and based on the current mode of operation, the Walsh spreader (203) either varies a Walsh code at a symbol rate, or holds the Walsh code constant. During multi-carrier transmission a first symbol within a data stream (210) is spread with a first Walsh code, while symbols immediately preceding and following the first symbol are spread by a another, differing Walsh code. The sequence of Walsh codes exiting the spreader (201) is further scrambled by a pair of Pseudo-Noise (PN) codes (224) that are held constant for three Walsh code periods during multi-carrier transmission, and are not held constant during direct-spread transmission.

摘要翻译： 向沃尔什扩展器（203）提供当前操作模式，并且基于当前操作模式，沃尔什扩展器（203）以符号速率改变沃尔什码，或者维持沃尔什码恒定。 在多载波传输期间，数据流（210）内的第一符号以第一沃尔什码扩展，而紧邻第一符号之前和之后的符号由另一不同的沃尔什码扩展。 离散扩展器（201）的沃尔什码序列进一步被多载波传输期间的三个沃尔什码周期保持恒定的伪噪声（PN）码对（224）加扰，并且在直接 扩展传输。

公开(公告)号：US06728218B1

公开(公告)日：2004-04-27

申请号：US09504651

申请日：2000-02-14

申请人： Robert John Corke ,  Robert T. Love ,  Ron Rotstein

发明人： Robert John Corke ,  Robert T. Love ,  Ron Rotstein

IPC分类号： G01R3108

CPC分类号： H04W28/10 ,  H04B7/264 ,  H04B2201/70703

摘要： A method and system for dynamic rate switching via medium access channel layer signaling is disclosed, wherein data rates for high data rate channels are automatically shifted up or down based on a predetermined metric. In a preferred embodiment, data rates are automatically shifted up or down based on transmit channel gain required to maintain a required signal to noise ratio.

摘要翻译： 公开了一种通过媒体接入信道层信令进行动态速率切换的方法和系统，其中高数据速率信道的数据速率基于预定度量被自动上移或下移。 在优选实施例中，基于维持所需信噪比所需的发送信道增益，数据速率自动向上或向下偏移。

公开(公告)号：US06414938B1

公开(公告)日：2002-07-02

申请号：US09504649

申请日：2000-02-14

申请人： Robert John Corke ,  Robert T. Love ,  Ron Rotstein

发明人： Robert John Corke ,  Robert T. Love ,  Ron Rotstein

IPC分类号： H04J314

CPC分类号： H04L1/0015 ,  H04L1/0002 ,  H04L1/0021 ,  H04L1/1809 ,  Y02D50/10

摘要： A method and system for retransmitting data packets in a communication system having variable data rates is disclosed. In a preferred embodiment, data packets are packetized to an atomic packet size equal to that of a lowest rate packet. If a data packet requires retransmission at a rate different than that at which the data packet was initially transmitted, the rate is dynamically changed based upon a multiple of the atomic packet size.

摘要翻译： 公开了一种用于在具有可变数据速率的通信系统中重传数据分组的方法和系统。 在优选实施例中，数据分组被分组化​​成等于最低速率分组的原子分组大小。 如果数据分组需要以与最初发送数据分组的速率不同的速率进行重传，则基于原子分组大小的倍数动态地改变速率。

公开(公告)号：US6091759A

公开(公告)日：2000-07-18

申请号：US200397

申请日：1998-11-24

申请人： Ron Rotstein ,  Yuda Yehuda Luz ,  Robert John Corke

发明人： Ron Rotstein ,  Yuda Yehuda Luz ,  Robert John Corke

IPC分类号： H04B1/707 ,  H04J11/00 ,  H04J13/00 ,  H04L5/02 ,  H04L27/26 ,  H04L27/30 ,  H04B7/00

CPC分类号： H04J13/0048 ,  H04B1/707 ,  H04L27/2626 ,  H04L5/026

摘要： A current mode of operation is provided to a Walsh spreader (203), and based on the current mode of operation, the Walsh spreader (203) either varies a Walsh code at a symbol rate, or holds the Walsh code constant. During multi-carrier transmission a first symbol within a data stream (210) is spread with a first Walsh code, while symbols immediately preceding and following the first symbol are spread by a another, differing Walsh code. The sequence of Walsh codes exiting the spreader (201) is further scrambled by a pair of Pseudo-Noise (PN) codes (224) that are held constant for three Walsh code periods during multi-carrier transmission, and are not held constant during direct-spread transmission.

摘要翻译： 向沃尔什扩展器（203）提供当前操作模式，并且基于当前操作模式，沃尔什扩展器（203）以符号速率改变沃尔什码，或者维持沃尔什码恒定。 在多载波传输期间，数据流（210）内的第一符号以第一沃尔什码扩展，而紧邻第一符号之前和之后的符号由另一不同的沃尔什码扩展。 离散扩展器（201）的沃尔什码序列进一步被多载波传输期间的三个沃尔什码周期保持恒定的伪噪声（PN）码对（224）加扰，并且在直接 扩展传输。

公开(公告)号：US06859505B2

公开(公告)日：2005-02-22

申请号：US10611760

申请日：2003-07-01

申请人： Gregory Agami ,  Robert John Corke ,  George Powley

发明人： Gregory Agami ,  Robert John Corke ,  George Powley

IPC分类号： H03G3/00 ,  H04L25/02 ,  H04L27/38 ,  H04J13/04

CPC分类号： H04L27/3809 ,  H03G3/005 ,  H04L25/0214

摘要： A method, apparatus and system for use in determining a pilot-to-data power ratio by receiving a data symbol (122) having a data amplitude, receiving a pilot signal (124) having a pilot amplitude, reverse training (350) an automatic gain (154) based on the data amplitude and the pilot amplitude, and determining a pilot-to-data power ratio (250) according to the reverse training of the automatic gain. In some embodiments the method further compensates for channel fading in the data symbol by providing for channel correction (340) on the data symbol, providing for channel correction (344) on the pilot signal and dividing the channel corrected data symbol by the channel corrected pilot signal providing a fading compensated data symbol, where the fading compensated data symbol (150) is provided prior to reverse training such that the reverse training is based at least in part on the fading compensated data symbol.

摘要翻译： 一种用于通过接收具有数据幅度的数据符号（122）来确定导频到数据功率比的方法，装置和系统，接收具有导频幅度的导频信号（124），反向训练（350），自动 基于数据幅度和导频幅度的增益（154），以及根据自动增益的反向训练确定导频数据功率比（250）。 在一些实施例中，该方法通过在数据符号上提供信道校正（340）来进一步补偿数据符号中的信道衰落，为导频信号提供信道校正（344），并将通道校正数据符号除以通道校正导频 信号提供衰落补偿数据符号，其中在反向训练之前提供衰落补偿数据符号（150），使得反向训练至少部分地基于衰落补偿数据符号。

公开(公告)号：US06879623B2

公开(公告)日：2005-04-12

申请号：US09819398

申请日：2001-03-28

申请人： Gregory Agami ,  Robert John Corke ,  Ron Rotstein ,  Daniel G. Prysby

发明人： Gregory Agami ,  Robert John Corke ,  Ron Rotstein ,  Daniel G. Prysby

IPC分类号： H04L7/02 ,  H04L27/30

CPC分类号： H04L7/0029

摘要： A receiving communication device synchronizes to a timing reference of a transmitting communication device based on a determined timing error. The receiving communication device determines the timing error by processing a synchronization signal via a first stage filtering and interpolation process that includes predetermined coefficients and a second stage interpolation process that includes a minimal number of dynamically determined coefficients. By dividing the process into a predetermined coefficient stage and a dynamically determined coefficient stage, the receiving communication device is able to make timing adjustments in a more efficient manner, that is, at a lesser processor loading, than a communication device in which all filtering and interpolation coefficients are dynamically determined. In addition, by including a second order timing recovery loop, the receiving communication device is able to quickly and precisely respond to drifting of a timing reference differential between itself and the transmitting communication device.

摘要翻译： 接收通信设备基于确定的定时误差与发送通信设备的定时参考同步。 接收通信设备经由包括预定系数的第一级滤波和内插处理以及包括动态确定系数的最小数量的第二级内插处理来处理同步信号来确定定时误差。 通过将处理划分为预定的系数级和动态确定的系数级，接收通信设备能够以比其它所有过滤和/或调制方式的通信设备更有效的方式（即，处理器负载较小）进行定时调整 插值系数是动态确定的。 此外，通过包括二阶定时恢复循环，接收通信设备能够快速且精确地响应其自身与发送通信设备之间的定时参考差分的漂移。