公开(公告)号：US06677864B2

公开(公告)日：2004-01-13

申请号：US10125253

申请日：2002-04-18

申请人： Ali S. Khayrallah

发明人： Ali S. Khayrallah

IPC分类号： H03M700

CPC分类号： H04L1/0057 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/1809 ,  H04L1/1887 ,  H04L2001/0093

摘要： Multicast data in a wireless network is encoded with FEC codes where K information symbols are encoded into N transmission symbols, N>K, where K−N represents redundancy, such that reception and decoding of any K+A transmission symbols is sufficient to recover the K information symbols, where A is small relative to K. The level of redundancy may be selected to provide adequate performance to a mobile terminal at the edge of a cell, or to the mobile terminal reporting the lowest quality link. Upon handoff, a mobile terminal may be directed to an ongoing multicast in the new cell of the same information, or alternatively the new cell may transmit only the multicast packets the mobile terminal has not received. Different time segments of the information may be separately encoded, or the same information encoded with different level of redundancy, and the encoded data transmitted on different wireless channels.

摘要翻译： 无线网络中的组播数据用FEC码编码，其中K个信息符号被编码为N个传输符号，N> K，其中KN表示冗余，使得任何K + A个传输符号的接收和解码足以恢复K个信息 符号，其中A相对于K小。可以选择冗余级别以向小区边缘的移动终端或报告最低质量链路的移动终端提供足够的性能。 在切换时，移动终端可以被引导到相同信息的新小区中的正在进行的多播，或者新的小区可以仅传送移动终端未接收的多播分组。 信息的不同时间段可以被单独编码，或者用不同冗余级别编码的相同信息，以及在不同无线信道上传输的编码数据。

公开(公告)号：US06324395B1

公开(公告)日：2001-11-27

申请号：US09195315

申请日：1998-11-18

申请人： Ali S. Khayrallah ,  David R. Irvin

发明人： Ali S. Khayrallah ,  David R. Irvin

IPC分类号： H04M1100

CPC分类号： H04W4/24 ,  H04M15/00 ,  H04M15/49 ,  H04M15/745 ,  H04M15/8016 ,  H04M15/8033 ,  H04M15/8044 ,  H04M2215/0108 ,  H04M2215/0168 ,  H04M2215/32 ,  H04M2215/42 ,  H04M2215/46 ,  H04M2215/7414 ,  H04M2215/7435 ,  H04M2215/745 ,  H04W12/08

摘要： Charge for communication of a message in a wireless communications system is assigned commensurate with the spectral and non-spectral resource demand associated with the service used to communicate the message. A service may be identified from a plurality of services in response to a user request to communicate a message, for example, and charge for the communication of the message assigned to the user based on the service identified. According to another aspect, the system may first determine whether sufficient system resources are available to communicate the message using the selected service. According to another aspect, the system may first determine whether the user is authorized to communicate the message using the selected service.

摘要翻译： 与无线通信系统中的消息通信的费用被分配与与用于传送消息的服务相关联的频谱和非频谱资源需求相称。 可以响应于用户传达消息的请求，从多个服务中识别服务，并且基于所识别的服务为分配给用户的消息的通信收费。 根据另一方面，系统可以首先确定足够的系统资源是否可用于使用所选服务来传送消息。 根据另一方面，系统可以首先确定用户是否被授权使用所选择的服务来传送消息。

公开(公告)号：US6047171A

公开(公告)日：2000-04-04

申请号：US4481

申请日：1998-01-08

申请人： Ali S. Khayrallah ,  Jiann-Ching Guey

发明人： Ali S. Khayrallah ,  Jiann-Ching Guey

IPC分类号： H04B1/10 ,  H04B1/06

CPC分类号： H04B1/1036 ,  H04B2001/1054

摘要： A receiver includes at least two intermediate frequency (IF) filters, with the first IF filter and a second filter having a narrower bandwidth than the first bandwidth. The receiver also includes a switch operable to select between the IF filters. In use, the receiver measures the signal strength of adjacent channels to the signal strength of a desired channel and switches to the second IF filter with a narrower bandwidth when a ratio of the signal strength of the channel and the signal strength of adjacent channels is less than a predetermined threshold. The predetermined threshold is determined based on considerations of range of detection and adjacent channel interference. The bandwidth of the filters in the receiver is also designed to optimize performance in consideration of both range of detection and adjacent channel interference.

摘要翻译： 接收机包括至少两个具有第一IF滤波器的中频滤波器和具有比第一带宽窄的带宽的第二滤波器。 接收机还包括可操作以在IF滤波器之间进行选择的开关。 在使用中，接收机根据所需信道的信号强度测量相邻信道的信号强度，并且当信道的信号强度与相邻信道的信号强度之比较小时，切换到具有较窄带宽的第二IF滤波器 超过预定阈值。 基于检测范围和相邻信道干扰的考虑来确定预定阈值。 接收机中的滤波器的带宽也被设计成考虑到检测范围和相邻信道干扰的优化性能。

公开(公告)号：US08503580B2

公开(公告)日：2013-08-06

申请号：US12912927

申请日：2010-10-27

申请人： Ali S. Khayrallah

发明人： Ali S. Khayrallah

IPC分类号： H04L27/06

CPC分类号： H04L25/03318 ,  H04L25/03229 ,  H04L25/067 ,  H04L27/3416 ,  H04L27/38 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

摘要： Soft bit values are generated for received symbols transmitted based on a modulation constellation by demodulating the received symbols via a sequence of demodulation stages, each demodulation stage producing a symbol decision based on an effective constellation. Each effective constellation used by a non-final one of the demodulation stages includes subsets of centroids approximating a region of the modulation constellation. Adjacent ones of the subsets have one or more common points so that at least two adjacent subsets overlap. The soft bit values for the symbol decisions are determined based on detection metrics computed during demodulation for the points included in the effective constellation constructed incrementally over the sequence of demodulation stages, the effective constellation produced by the final demodulation stage being devoid of one or more points included in the modulation constellation.

摘要翻译： 通过经由解调级的序列对接收到的符号进行解调，基于调制星座发送的接收符号产生软比特值，每个解调阶段基于有效星座产生符号决定。 由非最终解调级使用的每个有效星座包括近似调制星座的区域的质心子集。 相邻的子集具有一个或多个公共点，使得至少两个相邻子集重叠。 用于符号判定的软比特值基于在解调期间计算的针对包括在解调级序列上递增地构成的有效星座中的点的检测度量来确定，由最终解调级产生的有效星座没有一个或多个点 包含在调制星座中。

公开(公告)号：US20130148634A1

公开(公告)日：2013-06-13

申请号：US13324645

申请日：2011-12-13

申请人： Ali S. Khayrallah ,  Yi-Pin Eric Wang

发明人： Ali S. Khayrallah ,  Yi-Pin Eric Wang

IPC分类号： H04W36/00

CPC分类号： H04B7/0691 ,  H04B7/0452 ,  H04B7/0665 ,  H04B7/0697 ,  H04L25/0202

摘要： With the asymmetric resource sharing disclosed herein, a base station transmits fewer information symbols at some transmission times to one or more mobile terminals than to other mobile terminals at other transmission times. After transmitting the information symbols, the base station receives channel estimates from the mobile terminals, which the base station then use to generate synthesized signals representing estimates of the signals received at the mobile terminals. The base station subsequently combines complementary pairs of the synthesized signals to generate combined signals and transmits at least one of the combined signals to implement at least one virtual antenna for at least one of the mobile terminals.

摘要翻译： 利用这里公开的不对称资源共享，基站在一些传输时间将更少的信息符号发送到一个或多个移动终端，而不是在其他传输时间的其他移动终端。 在发送信息符号之后，基站从移动终端接收信道估计，基站然后用于产生表示在移动终端处接收的信号的估计的合成信号。 基站随后组合互补的合成信号对以产生组合信号并发送组合信号中的至少一个，以便为至少一个移动终端实现至少一个虚拟天线。

公开(公告)号：US08396168B2

公开(公告)日：2013-03-12

申请号：US12760839

申请日：2010-04-15

申请人： Ali S. Khayrallah ,  Chester Park ,  Yi-Pin Eric Wang

发明人： Ali S. Khayrallah ,  Chester Park ,  Yi-Pin Eric Wang

IPC分类号： H04L27/00

CPC分类号： H04L27/38 ,  H04L25/0242 ,  H04L25/03229 ,  H04L27/3416 ,  H04L2025/03388 ,  H04L2025/03414

摘要： In a receiver with a multi-stage equalizer, such as an SLI equalizer, cumulative symbol estimates generated in one or more early stages of the equalizer are used as effective pilot symbols to improve channel estimation for later stages.

摘要翻译： 在具有多级均衡器（诸如SLI均衡器）的接收机中，在均衡器的一个或多个早期阶段中生成的累积符号估计值被用作有效的导频符号，以改进稍后阶段的信道估计。

公开(公告)号：US08391201B2

公开(公告)日：2013-03-05

申请号：US11957522

申请日：2007-12-17

申请人： Ali S. Khayrallah ,  Havish Koorapaty

发明人： Ali S. Khayrallah ,  Havish Koorapaty

IPC分类号： H04B7/14

CPC分类号： H04B7/15592

摘要： Communications between a base station and a mobile station is improved through using a relay station. A transmit timing of relayed signals from the relay station is controlled so that the signals from the base station and the relay station arrive to the mobile station aligned with each other within a predetermined tolerance.

摘要翻译： 通过使用中继站，提高了基站与移动台之间的通信。 控制来自中继站的中继信号的发送定时，使得来自基站和中继站的信号到达移动站，并在预定的公差范围内相互对齐。

公开(公告)号：US08355471B2

公开(公告)日：2013-01-15

申请号：US12549157

申请日：2009-08-27

申请人： Ali S. Khayrallah

发明人： Ali S. Khayrallah

IPC分类号： H03D1/04 ,  H03D1/00 ,  H03D1/24 ,  H04L27/06

CPC分类号： H04B1/1081 ,  H04J11/0046 ,  H04L25/03229 ,  H04L25/0328 ,  H04L25/03299 ,  H04L25/03305 ,  H04L27/3416 ,  H04L27/38 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

摘要： A receiver includes a constellation processing module and a multi-stage demodulator having a plurality of non-final demodulation stages and a final demodulation stage. The constellation processing module derives a set of centroid-based values from subsets of constellation points associated with a plurality of transmitted signals for input to each of the non-final demodulation stages. Each of the non-final demodulation stages demodulates a group of signals input to the non-final demodulation stage using the set of centroid-based values as constellation points and suppresses residual interference associated with using the set of centroid-based values as constellation points for signal demodulation. The final demodulation stage demodulates a group of modified signals input to the final demodulation stage using the subset of constellation points input to the final demodulation stage to determine a final symbol decision for the plurality of transmitted signals.

公开(公告)号：US20120294393A1

公开(公告)日：2012-11-22

申请号：US13560492

申请日：2012-07-27

申请人： Ali S. Khayrallah

发明人： Ali S. Khayrallah

IPC分类号： H04B1/06

CPC分类号： H04L25/03305 ,  H04L25/03184 ,  H04L25/03331 ,  H04L2025/03426

摘要： A two-stage approach to MIMO detection improves receiver performance in a computationally tractable manner. A whitening joint detector processes a MIMO symbol stream. The whitening joint detector includes a pre-filter operative to suppress a first subset of the received MIMO streams as colored noise. The whitening joint detector further includes a primary joint detector operative to process a second subset of the MIMO streams and to output a preliminary solution obtained by minimizing a whitening joint detection metric. A secondary detector then operates in the vicinity of the primary joint detector preliminary solution. The secondary detector improves the preliminary solution by comparison to a full joint detection metric.

摘要翻译： MIMO检测的两阶段方法以计算容易的方式改善了接收机的性能。 美白联合检测器处理MIMO符号流。 美白联合检测器包括一个预滤波器，用于将接收的MIMO流的第一子集抑制为有色噪声。 美白联合检测器还包括主接头检测器，其操作以处理MIMO流的第二子集，并输出通过使美白关节检测度量最小化获得的初步解。 次级检测器然后在主接头检测器初步解决方案附近操作。 二次检测器通过与全关节检测度量相比较来改善初步解决方案。

公开(公告)号：US08279916B2

公开(公告)日：2012-10-02

申请号：US12549143

申请日：2009-08-27

申请人： Ali S. Khayrallah

发明人： Ali S. Khayrallah

IPC分类号： H04L27/01

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

摘要： A receiver includes a constellation processing module and a plurality of equalization stages. The constellation processing module 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 and groups the centroid-based values into one or more sets. Each of the equalization stages except for a the last equalization stage localizes a search for a final symbol decision using the set of centroid-based values input to or selected by the equalization stage as constellation points. The last equalization stage determines the final symbol decision using the subset of constellation points input to or selected by the last equalization stage.

摘要翻译： 接收机包括星座处理模块和多个均衡级。 星座处理模块将与发射信号相关联的星座的点分组成多个子集。 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。 星座处理模块还确定每个星座点子集的基于质心的值，并将基于质心的值分组成一个或多个集合。 除了最后的均衡阶段之外的每个均衡阶段使用输入到均衡阶段或由均衡阶段选择的基于质心的值集合来定位搜索最终符号决定作为星座点。 最后的均衡阶段使用输入到最后均衡阶段选择的星座点的子集来确定最终符号决定。