公开(公告)号：US08457254B2

公开(公告)日：2013-06-04

申请号：US12572692

申请日：2009-10-02

申请人： Ali Khayrallah

发明人： Ali Khayrallah

IPC分类号： H04L27/01

CPC分类号： H04L25/03012 ,  H04L25/03229 ,  H04L25/0328 ,  H04L25/03299 ,  H04L25/03305 ,  H04L27/3416 ,  H04L27/38 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

摘要： A constellation processing module of a receiver groups points of a constellation associated with a transmitted signal into a plurality of subsets. At least two adjacent ones of the subsets have one or more common constellation points so that the at least two adjacent subsets overlap. The constellation processing module also determines a centroid-based value for each of the subsets of constellation points. A non-final equalization stage localizes a search for a final symbol decision using a set of the centroid-based values as constellation points. An interference suppresser suppresses residual self-interference which arises from using the set of centroid-based values as constellation points to localize the search for the final symbol decision instead of the constellation points used to modulate the transmitted signal. A final equalization stage determines the final symbol decision using a subset of the constellation points used to modulate the transmitted signal.

摘要翻译： 接收机的星座处理模块将与传送的信号相关联的星座的点组合成多个子集。 至少两个相邻子集具有一个或多个公共星座点，使得至少两个相邻子集重叠。 星座处理模块还针对星座点的每个子集确定基于质心的值。 非最终均衡阶段使用一组基于质心的值作为星座点来定位对最终符号判定的搜索。 干扰抑制器抑制由使用基于质心的值作为星座点而产生的残余自干扰，以定位对最终符号决定的搜索，而不是用于调制发射信号的星座点。 最后的均衡阶段使用用于调制所发送的信号的星座点的子集确定最终的符号决定。

公开(公告)号：US20110051796A1

公开(公告)日：2011-03-03

申请号：US12572692

申请日：2009-10-02

申请人： Ali Khayrallah

发明人： Ali Khayrallah

IPC分类号： H04L27/01

CPC分类号： H04L25/03012 ,  H04L25/03229 ,  H04L25/0328 ,  H04L25/03299 ,  H04L25/03305 ,  H04L27/3416 ,  H04L27/38 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

摘要： A constellation processing module of a receiver groups points of a constellation associated with a transmitted signal into a plurality of subsets. At least two adjacent ones of the subsets have one or more common constellation points so that the at least two adjacent subsets overlap. The constellation processing module also determines a centroid-based value for each of the subsets of constellation points. A non-final equalization stage localizes a search for a final symbol decision using a set of the centroid-based values as constellation points. An interference suppresser suppresses residual self-interference which arises from using the set of centroid-based values as constellation points to localize the search for the final symbol decision instead of the constellation points used to modulate the transmitted signal. A final equalization stage determines the final symbol decision using a subset of the constellation points used to modulate the transmitted signal.

摘要翻译： 接收机的星座处理模块将与传送的信号相关联的星座的点组合成多个子集。 至少两个相邻子集具有一个或多个公共星座点，使得至少两个相邻子集重叠。 星座处理模块还针对星座点的每个子集确定基于质心的值。 非最终均衡阶段使用一组基于质心的值作为星座点来定位对最终符号判定的搜索。 干扰抑制器抑制由使用基于质心的值作为星座点而产生的残余自干扰，以定位对最终符号决定的搜索，而不是用于调制发射信号的星座点。 最后的均衡阶段使用用于调制所发送的信号的星座点的子集确定最终的符号决定。

公开(公告)号：US20070011600A1

公开(公告)日：2007-01-11

申请号：US11451724

申请日：2006-06-13

申请人： Hanna Johannesson ,  Ali Khayrallah ,  Gregory Bottomley

发明人： Hanna Johannesson ,  Ali Khayrallah ,  Gregory Bottomley

IPC分类号： G06F11/00 ,  H03M13/00

CPC分类号： H03M13/05 ,  H03M13/11 ,  H03M13/255

摘要： According to a method and apparatus taught herein, a decoding circuit and method decode linear block codes based on determining joint probabilities for one or more related subsets of bits in received data blocks. The use of joint probabilities enables faster and more reliable determination of received bits, meaning that, for example, joint probability decoding requires fewer decoding iterations than a comparable decoding process based on single-bit probabilities. As a non-limiting example, the decoding circuit and method taught herein provide advantageous operation with Low Density Parity Check (LDPC) codes, and can be incorporated in a variety of communication systems and devices, such as those associated with wireless communication networks.

摘要翻译： 根据本文教导的方法和装置，解码电路和方法基于确定接收数据块中一个或多个相关的比特子集的联合概率来解码线性块码。 联合概率的使用使得能够更快更可靠地确定接收到的比特，这意味着例如，联合概率解码比基于单比特概率的可比较的解码过程需要更少的解码迭代。 作为非限制性示例，本文教导的解码电路和方法提供了具有低密度奇偶校验（LDPC）码的有利操作，并且可以并入各种通信系统和设备中，诸如与无线通信网络相关联的通信系统和设备。

公开(公告)号：US20060092873A1

公开(公告)日：2006-05-04

申请号：US10977699

申请日：2004-10-29

申请人： Ali Khayrallah

发明人： Ali Khayrallah

IPC分类号： H04Q7/00 ,  H04Q7/28

CPC分类号： H04L1/0071 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0026

摘要： The present invention pertains to a transmitter that can exploit feedback to help it organize information which is subsequently sent to a receiver. More specifically, the transmitter receives a feedback signal from the receiver and then uses data about a channel in the feedback signal to adapt at least one of a coding, interleaving and modulating scheme to organize information which is subsequently transmitted to the receiver. In this way, the transmitter can obtain the best match of a channel and a given information payload.

摘要翻译： 本发明涉及可以利用反馈来帮助其组织随后发送到接收机的信息的发射机。 更具体地，发射机从接收机接收反馈信号，然后使用关于反馈信号中的信道的数据来适应编码，交织和调制方案中的至少一个来组织随后传送到接收机的信息。 以这种方式，发射机可以获得信道和给定信息有效载荷的最佳匹配。

公开(公告)号：US20050130616A1

公开(公告)日：2005-06-16

申请号：US10736122

申请日：2003-12-15

申请人： Ali Khayrallah ,  Carmela Cozzo ,  Gregory Bottomley

发明人： Ali Khayrallah ,  Carmela Cozzo ,  Gregory Bottomley

IPC分类号： H04B7/00

CPC分类号： H04B1/707 ,  H04B1/7117 ,  H04B2201/709727

摘要： The present application describes a new path search and verification method and apparatus for identifying and selecting one or more delays for a receiver. A front-end receiver receives a signal having one or more signal images, where each signal image has a corresponding signal delay. A tree generator builds a hierarchical delay tree from a plurality of delay nodes, each corresponding to one of the signal delays. A tree searcher searches through the delay tree to identify one or more surviving delay nodes, where each surviving delay node corresponds to a candidate delay for the receiver. The receiver may also include a state machine comprising a plurality of ordered states for providing candidate delays for the receiver. The state machine stores the candidate delays and shifts the candidate delays between states within the state machine based on the latest results from the tree searcher.

摘要翻译： 本申请描述了用于识别和选择接收机的一个或多个延迟的新的路径搜索和验证方法和装置。 前端接收器接收具有一个或多个信号图像的信号，其中每个信号图像具有对应的信号延迟。 树生成器从多个延迟节点构建分层延迟树，每个延迟节点对应于一个信号延迟。 树搜索器通过延迟树搜索以识别一个或多个幸存延迟节点，其中每个存活延迟节点对应于接收机的候选延迟。 接收机还可以包括状态机，其包括用于为接收机提供候选延迟的多个有序状态。 状态机根据树搜索器的最新结果存储候选延迟并在状态机内状态之间移动候选延迟。

公开(公告)号：US20050069023A1

公开(公告)日：2005-03-31

申请号：US10672127

申请日：2003-09-26

申请人： Gregory Bottomley ,  Carmela Cozzo ,  Ali Khayrallah ,  Dignus-Jan Moelker

发明人： Gregory Bottomley ,  Carmela Cozzo ,  Ali Khayrallah ,  Dignus-Jan Moelker

IPC分类号： H04B1/707

CPC分类号： H04B1/712 ,  H04B1/711 ,  H04B2201/709727

摘要： A RAKE receiver circuit generates combining weights based on channel estimates and combining statistics that comprise channel coefficient statistics, noise statistics, and channel estimation error statistics. Together, these statistics incorporate the relationships in noise and channel estimation across two or more RAKE fingers, and thus improve combining weight generation. Exemplary determination of statistics comprises channel coefficient cross-correlations, noise cross-correlations, and channel estimation error cross-correlations. Determination of the statistics can be varied based on, for example, the assumption of default or nominal signal models. Further, statistics determination can be configured for different receive and transmit diversity scenarios, wherein combining statistics can be determined on a per diversity signal basis, or jointly for two or more diversity signals, or in a mixed separate/joint method wherein one or more statistics are determined on a per signal basis and one or more statistics are determined across the signals.

摘要翻译： RAKE接收机电路基于信道估计产生组合权重，并组合包括信道系数统计，噪声统计和信道估计误差统计的统计。 一起，这些统计结合了两个或更多个RAKE手指之间的噪声和信道估计的关系，从而改进了组合权重的产生。 统计量的示例性确定包括信道系数互相关，噪声互相关和信道估计误差互相关。 统计数据的确定可以根据例如默认或标称信号模型的假定而变化。 此外，可以针对不同的接收和发送分集场景配置统计确定，其中组合统计可以基于每个分集信号或联合地为两个或更多个分集信号确定，或者以混合分离/联合方法，其中一个或多个统计 在每个信号的基础上确定，并且跨信号确定一个或多个统计。

公开(公告)号：US06332006B1

公开(公告)日：2001-12-18

申请号：US09195790

申请日：1998-11-18

申请人： Nils Rydbeck ,  Barbara Molnar ,  Jiann-Ching Guey ,  Ali Khayrallah ,  R. David Koilpillai

发明人： Nils Rydbeck ,  Barbara Molnar ,  Jiann-Ching Guey ,  Ali Khayrallah ,  R. David Koilpillai

IPC分类号： H04B102

CPC分类号： H04L1/007 ,  H04L1/02 ,  H04L27/2071

摘要： A message, e.g., a control message, a short message, a voice message or a data message, is transmitted on at least one of a first communications channel having a first redundancy level or a second communications channel having a second, higher redundancy level. A radio communications signal is received on one of the first communications channel and the second communications channel. The received radio communications signal is demodulated to recover the message using a first demodulation scheme if the radio communications signal is received on the first communications channel and using a second demodulation scheme if the radio communications signal is received on the second communications channel. According to an aspect of the invention, the received radio communications signal is coherently demodulated if the radio communications signal is received over the first communications channel and non-coherently demodulated if the radio communications signal is received over the second communications channel. According to another aspect, the message is transmitted on the first communications channel using a first modulation constellation, and transmitted on the second communications channel using a second modulation constellation representing a subset of the first modulation constellation. In other embodiments of the present invention, a first radio communications signal is transmitted representing the message encoded according to one of a first code or a second code that represents a concatenation of the first code and an additional code, such as an orthogonal code or a quasi orthogonal code. Related systems and apparatus are also described.

摘要翻译： 在具有第一冗余级别的第一通信信道或具有第二较高冗余级别的第二通信信道中的至少一个上发送消息，例如控制消息，短消息，语音消息或数据消息。 在第一通信信道和第二通信信道之一上接收无线电通信信号。 如果在第一通信信道上接收到无线电通信信号并且如果在第二通信信道上接收到无线电通信信号，则使用第二解调方案，解调接收到的无线电通信信号以使用第一解调方案来恢复消息。 根据本发明的一个方面，如果在第一通信信道上接收到无线电通信信号并且如果在第二通信信道上接收到无线电通信信号而被非相干解调，则所接收的无线电通信信号被相干解调。 根据另一方面，使用第一调制星座在第一通信信道上发送消息，并且使用表示第一调制星座的子集的第二调制星座在第二通信信道上发送消息。 在本发明的其他实施例中，发送第一无线电通信信号，表示根据代表第一代码和附加代码的级联的第一代码或第二代码之一编码的消息，诸如正交码或 准正交码。 还描述了相关系统和装置。

公开(公告)号：US06320843B1

公开(公告)日：2001-11-20

申请号：US09193261

申请日：1998-11-18

申请人： Nils Rydbeck ,  Barbara Molnar ,  Jiann-Ching Guey ,  Ali Khayrallah ,  R. David Koilpillai

发明人： Nils Rydbeck ,  Barbara Molnar ,  Jiann-Ching Guey ,  Ali Khayrallah ,  R. David Koilpillai

IPC分类号： H04J1100

CPC分类号： H04L1/0003 ,  H04L1/0009

摘要： In a wireless communications system, information is communicated over one of a first communications channel having a first redundancy level or a second communications channel having a second redundancy level based on a determination of communications quality for at least one of the channels. In embodiments of the present invention, communications occur over a first channel, e.g., a “standard” channel until a measure of communications quality for that channel, such as bit error rate or frame error rate, meets a predetermined criterion. When the communications quality meets the predetermined criterion, communications shifts to a “robust” high-penetration channel that utilizes substantially the same amount of spectral resource as the first channel but provides significantly increased redundancy. In other embodiments, a terminal, e.g., a cellular radiotelephone or other radio terminal, registers with a wireless communications system via one of a standard broadcast control channel or a high-penetration broadcast control channel, and switches therebetween based upon a determination of communications quality for the standard broadcast control channel. For example, the terminal may switch to the high-penetration broadcast control channel upon failure to acquire the standard broadcast control channel in a disadvantaged reception area.

摘要翻译： 在无线通信系统中，基于对于至少一个信道的通信质量的确定，在具有第一冗余级别的第一通信信道之一或具有第二冗余级别的第二通信信道之一上传送信息。 在本发明的实施例中，通信发生在第一信道，例如“标准”信道上，直到该信道的通信质量的度量（诸如误码率或帧错误率）满足预定标准。 当通信质量满足预定标准时，通信转移到利用与第一信道基本上相同的频谱资源量的“稳健”高穿透信道，但提供显着增加的冗余度。 在其他实施例中，诸如蜂窝无线电话机或其他无线电终端的终端通过标准广播控制信道或高穿透广播控制信道之一向无线通信系统注册，并且基于通信质量的确定来切换它们 用于标准广播控制频道。 例如，如果在不利的接收区域中获取标准广播控制信道，则终端可以切换到高穿透广播控制信道。

公开(公告)号：US20100254446A1

公开(公告)日：2010-10-07

申请号：US12419053

申请日：2009-04-06

申请人： Ali Khayrallah ,  Gregory Bottomley

发明人： Ali Khayrallah ,  Gregory Bottomley

IPC分类号： H04L27/01

CPC分类号： H04B7/005 ,  H04L25/03178

摘要： A receiver and method are described herein that address inter-symbol interference in a received signal by using a two-stage equalizer which includes a first demodulation stage that processes the received signal and produces initial symbol decisions, and a non-linear equalization second stage that uses the received signal to perform a sequential search in an attempt to improve upon the initial symbol decisions where if able to improve upon the initial symbol decisions then an output sequence is obtained from the sequential search and if not able to improve upon the sequence metric threshold then the output sequence is the initial symbol decisions.

摘要翻译： 本文描述了一种接收机和方法，其通过使用包括处理接收信号并产生初始符号决定的第一解调级的两级均衡器来解决接收信号中的符号间干扰，以及非线性均衡第二级， 使用所接收的信号来执行顺序搜索以尝试改进初始符号决定，其中如果能够改进初始符号判定，则从顺序搜索获得输出序列，并且如果不能改进序列度量阈值 那么输出序列是初始符号决定。

公开(公告)号：US20060293074A1

公开(公告)日：2006-12-28

申请号：US11167370

申请日：2005-06-27

申请人： Gregory Bottomley ,  Ali Khayrallah ,  Erik Dahlman

发明人： Gregory Bottomley ,  Ali Khayrallah ,  Erik Dahlman

IPC分类号： H04B7/00

CPC分类号： H04W52/322 ,  H04W52/247

摘要： A system and method for adapting a broadcast service in a cellular communication network. A base station receives indications of channel quality from registered users of the broadcast service, and adapts broadcast transmission parameters to improve channel quality for the broadcast users if at least one of the broadcast users indicates that channel quality needs to be improved. If none of the broadcast users indicates that channel quality needs to be improved, the base station adapts the transmission parameters to decrease channel quality for the broadcast users. The transmission parameters may be adapted by techniques such as changing the broadcast transmit power, changing the level of FEC encoding and modulation, changing the number of channel resources allocated, or changing the transmission data rate for the broadcast service. When multiple base stations transmit the broadcast information, a base station controller may minimize network resource utilization by coordinating adaptation control among the base stations.