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：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。

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：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：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：US06985099B1

公开(公告)日：2006-01-10

申请号：US09693799

申请日：2000-10-20

申请人： Yuda Yehuda Luz ,  Ron Rotstein ,  Gregory Agami

发明人： Yuda Yehuda Luz ,  Ron Rotstein ,  Gregory Agami

IPC分类号： H03M1/18

CPC分类号： H03M1/185

摘要： An automatic gain control includes a digital lowpass filter for filtering a series of digital samples generated by an analog-to-digital converter to generate a lowpass filtered digital sample series; a power averager coupled to the digital lowpass filter for calculating an average power of the lowpass filtered digital sample series; and a lookup table coupled to the power averager for setting a selectable gain of an amplifier coupled to the analog-to-digital converter as a function of the average power.

摘要翻译： 自动增益控制包括数字低通滤波器，用于对由模数转换器产生的一系列数字采样进行滤波以产生低通滤波的数字采样序列; 耦合到所述数字低通滤波器的功率平均器，用于计算所述低通滤波数字样本序列的平均功率; 以及耦合到所述功率平均器的查找表，用于设置耦合到所述模数转换器的放大器的可选增益作为所述平均功率的函数。

公开(公告)号：US06661853B1

公开(公告)日：2003-12-09

申请号：US09524309

申请日：2000-03-14

申请人： Gregory Agami ,  Ron Rotstein ,  Robert J. Corke

发明人： Gregory Agami ,  Ron Rotstein ,  Robert J. Corke

IPC分类号： H03D100

CPC分类号： H04B7/0857 ,  H04B7/022 ,  H04L1/0054

摘要： A method and apparatus for maximal-ratio combining of received frame data is provided. This technique increases the reliability of a communication network that includes multiple independent receivers. For example, when multiple independent receivers are not in agreement as to the received frame data (501, 502, 503), an embodiment of the invention provides a higher likelihood of correctly identifying the received frame data (501, 502, 503). A technique for determining a signal-to-noise ratio from a metric signal (504) derived from a decoder (701) in a receiver is provided. The signal-to-noise ratio may be characterized according to a polynomial estimate or stored in lookup table. The signal-to-noise ratio is used to apply a weighting (805) to “hard decision” data from the receiver to yield a weighted value (806). The weighted value is combined with weighted values from other receivers. The combined weighted values are applied to a data slicer (414) to yield received data (807).

摘要翻译： 提供了一种用于接收帧数据的最大比组合的方法和装置。 这种技术增加了包括多个独立接收机的通信网络的可靠性。 例如，当多个独立的接收机对于接收到的帧数据（501,502,503）不一致时，本发明的一个实施例提供了更好地正确地识别接收的帧数据（501,502,503）的可能性。 提供了一种用于从接收机中的解码器（701）导出的度量信号（504）确定信噪比的技术。 可以根据多项式估计来表征信噪比，或存储在查找表中。 信噪比用于将来自接收机的加权（805）应用于“硬判决”数据以产生加权值（806）。 加权值与其他接收机的加权值组合。 将组合的加权值应用于数据限幅器（414）以产生接收数据（807）。

公开(公告)号：US06820108B2

公开(公告)日：2004-11-16

申请号：US09949331

申请日：2001-09-07

申请人： Gregory Agami ,  Ron Rotstein ,  Robert J. Corke

发明人： Gregory Agami ,  Ron Rotstein ,  Robert J. Corke

IPC分类号： G06F750

CPC分类号： G06F7/535 ,  G06F2207/5355

摘要： In accordance with the preferred embodiment of the present invention a gain (A) is determined and utilized to cyclically converge upon a quotient (Q). More particularly, once A is determined, an estimate of QN is multiplied by Y to estimate {circumflex over (X)}N, where Q=X/Y. The value of {circumflex over (X)}N is then subtracted from X to determine an error (eN), which is multiplied by A. The value of AeN(n) is added to AeN(n−1) to produce an estimate of Q. Once convergence has occurred, the value for Q is output from the circuitry.

摘要翻译： 根据本发明的优选实施例，增益（A）被确定并用于循环地收敛于商（Q）。 更具体地，一旦确定了A，将QN的估计乘以Y来估计XN，其中Q = X / Y。 然后从X中减去XN的值以确定乘以A的误差（eN）。将AeN（n）的值加到AeN（n-1）以产生Q的估计。一旦发生收敛 ，Q的值从电路输出。