公开(公告)号：US08170154B2

公开(公告)日：2012-05-01

申请号：US12575740

申请日：2009-10-08

Applicant: Nabil R. Yousef ,  Thomas J. Kolze ,  Jonathan S. Min

Inventor： Nabil R. Yousef ,  Thomas J. Kolze ,  Jonathan S. Min

IPC: H04L27/06

CPC classification number: H04N21/6168 ,  H04B1/71 ,  H04B1/7102 ,  H04B1/7103 ,  H04B1/71055 ,  H04B1/71072 ,  H04B2201/709709 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0045 ,  H04L1/005 ,  H04L1/0057

Abstract: A system for mitigating impairment in a communication system includes a delay block, a signal level block, a moving average window block, an impulse noise detection block, and a combiner. The delay block receives and delays each chip of a plurality of chips in a spreading interval. The signal level block determines a signal level of each chip of the plurality of chips in the spreading interval. The moving average window block determines a composite signal level for a chip window corresponding to the chip. The impulse noise detection block receives the signal level, receives the composite signal level, and produces an erasure indication for each chip of the plurality of chips of the corresponding chip window. The combiner erases chips of the plurality of chips of the spreading interval based upon the erasure indication.

Abstract translation: 用于减轻通信系统中的损害的系统包括延迟块，信号电平块，移动平均窗口块，脉冲噪声检测块和组合器。 延迟块在扩展间隔中接收并延迟多个芯片的每个芯片。 信号电平块在扩展间隔中确定多个芯片的每个芯片的信号电平。 移动平均窗口块确定与芯片对应的芯片窗口的复合信号电平。 脉冲噪声检测块接收信号电平，接收复合信号电平，并产生相应芯片窗口的多个芯片的每个芯片的擦除指示。 基于擦除指示，组合器擦除扩展间隔的多个芯片的芯片。

公开(公告)号：US07602839B2

公开(公告)日：2009-10-13

申请号：US12110305

申请日：2008-04-26

Applicant: Thomas J. Kolze ,  Nabil R. Yousef ,  Jonathan S. Min

Inventor： Thomas J. Kolze ,  Nabil R. Yousef ,  Jonathan S. Min

IPC: H04B1/00

CPC classification number: H04N21/6168 ,  H04B1/71 ,  H04B1/7102 ,  H04B1/7103 ,  H04B1/71055 ,  H04B1/71072 ,  H04B2201/709709 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0045 ,  H04L1/005 ,  H04L1/0057

Abstract: A system for mitigating impairment in a communication system includes a delay block, a signal level block, a moving average window block, an impulse noise detection block, and a combiner. The delay block receives and delays each chip of a plurality of chips in a spreading interval. The signal level block determines a signal level of each chip of the plurality of chips in the spreading interval. The moving average window block determines a composite signal level for a chip window corresponding to the chip. The impulse noise detection block receives the signal level, receives the composite signal level, and produces an erasure indication for each chip of the plurality of chips of the corresponding chip window. The combiner erases chips of the plurality of chips of the spreading interval based upon the erasure indication.

Abstract translation: 用于减轻通信系统中的损害的系统包括延迟块，信号电平块，移动平均窗口块，脉冲噪声检测块和组合器。 延迟块在扩展间隔中接收并延迟多个芯片的每个芯片。 信号电平块在扩展间隔中确定多个芯片的每个芯片的信号电平。 移动平均窗口块确定与芯片对应的芯片窗口的复合信号电平。 脉冲噪声检测块接收信号电平，接收复合信号电平，并产生相应芯片窗口的多个芯片的每个芯片的擦除指示。 基于擦除指示，组合器擦除扩展间隔的多个芯片的芯片。

公开(公告)号：US20080291980A1

公开(公告)日：2008-11-27

申请号：US11522839

申请日：2006-09-18

Applicant: Bruce J. Currivan ,  Thomas J. Kolze ,  Gottfried Ungerboeck ,  Nabil R. Yousef

Inventor： Bruce J. Currivan ,  Thomas J. Kolze ,  Gottfried Ungerboeck ,  Nabil R. Yousef

IPC: H04B1/707

CPC classification number: H04B7/216 ,  H04B1/71 ,  H04B1/7102 ,  H04B1/7105 ,  H04B1/7107 ,  H04J13/0003 ,  H04J13/16

Abstract: Cancellation of interference in a communication system with application to S-CDMA. A relatively straight-forward implemented and computationally efficient approach of selecting a predetermined number of unused codes is used to perform weighted linear combination selectively with each of the input spread signals in a multiple access communication system. If desired, the predetermined number of unused codes is always the same in each implementation. Alternatively, the predetermined number of unused codes is selected from within a reordered code matrix using knowledge that is shared between the two ends of a communication system, such as between the CMs and a CMTS. While the context of an S-CDMA communication system having CMs and a CMTS is used, the solution is generally applicable to any communication system that seeks to cancel narrowband interference. Several embodiments are also described that show the generic applicability of the solution across a wide variety of systems.

Abstract translation: 消除应用于S-CDMA的通信系统中的干扰。 使用选择预定数量的未使用代码的相对直接的实现和计算上有效的方法来在多址通信系统中与每个输入扩展信号选择性地执行加权线性组合。 如果需要，在每个实现中，预定数量的未使用代码总是相同的。 或者，使用在诸如CM和CMTS之间的通信系统的两端之间共享的知识，从重排序代码矩阵中选择预定数量的未使用代码。 虽然使用具有CM和CMTS的S-CDMA通信系统的上下文，但该解决方案通常适用于试图取消窄带干扰的任何通信系统。 还描述了几个实施例，其显示了解决方案在各种系统上的通用适用性。

公开(公告)号：US07415061B2

公开(公告)日：2008-08-19

申请号：US11089139

申请日：2005-03-24

Applicant: Bruce J. Currivan ,  Nabil R. Yousef ,  Thomas J. Kolze ,  Gottfried Ungerboeck

Inventor： Bruce J. Currivan ,  Nabil R. Yousef ,  Thomas J. Kolze ,  Gottfried Ungerboeck

IPC: H04B1/707

CPC classification number: H04B7/216 ,  H04B1/71 ,  H04B1/7107 ,  H04J13/0003 ,  H04J13/16 ,  H04L25/03038 ,  H04L25/03343 ,  H04L25/49 ,  H04L27/3405 ,  H04L2025/03375 ,  H04L2025/03477

Abstract: A communication system performs burst noise cancellation. A transmitter produces and transmits a spread signal that comprises at least one known-value symbol spread by a plurality of non data-carrying orthogonal codes and data symbols spread by at least one data-carrying orthogonal code. The transmitter transmits the spread signal across a communication link that introduces burst noise. A burst noise detector determines burst noise affected chips of the orthogonal codes. A weight computation functional block calculates a plurality of complex-valued combining weights based upon the burst noise affected chips. A vector de-spreader and a linear combiner operate in combination to use the plurality of non data-carrying orthogonal codes, the at least one data-carrying orthogonal code, and the plurality of complex-valued combining weights to de-spread the received spread signal to produce the data symbols with the burst noise substantially removed.

Abstract translation: 通信系统执行突发噪声消除。 发射机产生并发射扩展信号，该扩展信号包括由多个非数据携带正交码扩展的至少一个已知值符号和由至少一个携带数据的正交码扩展的数据符号。 发射机通过引入突发噪声的通信链路发送扩展信号。 突发噪声检测器确定正交码的突发噪声影响码片。 权重计算功能块基于突发噪声影响的码片计算多个复值组合权重。 向量解扩器和线性组合器组合操作以使用多个非数据携带正交码，所述至少一个数据携带正交码和多个复值组合权重来对接收到的扩展进行解扩展 信号以产生具有基本去除的突发噪声的数据符号。

公开(公告)号：US20080152001A1

公开(公告)日：2008-06-26

申请号：US11615283

申请日：2006-12-22

Applicant: Nabil R. Yousef

Inventor： Nabil R. Yousef

IPC: H04B1/66

CPC classification number: H04N21/64315 ,  H04N19/107 ,  H04N19/164 ,  H04N19/172 ,  H04N19/61 ,  H04N21/2381 ,  H04N21/4384 ,  H04N21/6131 ,  H04N21/6377 ,  H04N21/6379 ,  H04N21/658

Abstract: A system and method of transmitting video in a time division multiplexing (TDM) system, wherein the method comprises identifying a video reference frame from a series of video frames; encoding a difference between the video reference frame and a video non-reference frame; placing the video reference frame at a beginning of a data burst; transmitting the series of video frames and the data burst from a transmitter to a mobile TV receiver; and the mobile TV receiver immediately locating the video reference frame upon receipt of the data burst. The method may further comprise the mobile TV receiver decoding the series of video frames. Additionally, the placing process results in a substantially non-existent channel switching delay in the mobile TV receiver. Moreover, the method may further comprise placing exactly one video reference frame at the beginning of the data burst. Preferably, the TDM system comprises a mobile TV system.

Abstract translation: 一种在时分复用（TDM）系统中传输视频的系统和方法，其中该方法包括从一系列视频帧中识别视频参考帧; 编码视频参考帧和视频非参考帧之间的差异; 将视频参考帧放置在数据突发的开始处; 将一系列视频帧和数据突发从发射机发射到移动电视接收机; 并且移动电视接收机在接收到数据突发时立即定位视频参考帧。 该方法还可以包括对一系列视频帧进行解码的移动电视接收机。 此外，放置处理导致移动TV接收机中基本上不存在的信道切换延迟。 此外，该方法还可以包括在数据突发的开始处恰好放置一个视频参考帧。 优选地，TDM系统包括移动TV系统。

公开(公告)号：US07215700B2

公开(公告)日：2007-05-08

申请号：US11522837

申请日：2006-09-18

Applicant: Bruce J. Currivan ,  Thomas J. Kolze ,  Gottfried Ungerboeck ,  Nabil R. Yousef

Inventor： Bruce J. Currivan ,  Thomas J. Kolze ,  Gottfried Ungerboeck ,  Nabil R. Yousef

IPC: H04B1/707

CPC classification number: H04B7/216 ,  H04B1/71 ,  H04B1/7102 ,  H04B1/7105 ,  H04B1/7107 ,  H04J13/0003 ,  H04J13/16

Abstract: Cancellation of interference in a communication system with application to S-CDMA. A relatively straight-forward implemented and computationally efficient approach of selecting a predetermined number of unused codes is used to perform weighted linear combination selectively with each of the input spread signals in a multiple access communication system. If desired, the predetermined number of unused codes is always the same in each implementation. Alternatively, the predetermined number of unused codes is selected from within a reordered code matrix using knowledge that is shared between the two ends of a communication system, such as between the CMs and a CMTS. While the context of an S-CDMA communication system having CMs and a CMTS is used, the solution is generally applicable to any communication system that seeks to cancel narrowband interference. Several embodiments are also described that show the generic applicability of the solution across a wide variety of systems.

公开(公告)号：US07139339B2

公开(公告)日：2006-11-21

申请号：US10114565

申请日：2002-04-02

Applicant: Nabil R. Yousef ,  Jun Ma ,  Jonathan S. Min

Inventor： Nabil R. Yousef ,  Jun Ma ,  Jonathan S. Min

IPC: H04L27/06

CPC classification number: H04B1/707 ,  H04B2201/70701 ,  H04L2027/0055

Abstract: Iterative data-aided carrier CFO estimation for CDMA systems. Any communication receiver may be adapted to perform the iterative data-aided carrier CFO estimation. The iterative data-aided carrier CFO estimation is performed using a high accuracy method. The operation may be described as follows: a received signal is despread and buffered. Using the received preamble sequence, an initial estimate of the CFO is obtained. This estimate is used to correct the whole despread data. The corrected data using the initial CFO estimate is sliced. Each despread data symbol is divided by the corresponding sliced data decision. The obtained sequence is then averaged across different codes to obtain a less noisy sequence, which is then used to estimate the CFO again. The procedure can be repeated (iterated) to obtain a more accurate carrier frequency offset estimate; the number of times in which the procedure is repeated may be programmable or predetermined.

公开(公告)号：US07110434B2

公开(公告)日：2006-09-19

申请号：US10142189

申请日：2002-05-08

Applicant: Bruce J. Currivan ,  Thomas J. Kolze ,  Gottfried Ungerboeck ,  Nabil R. Yousef

Inventor： Bruce J. Currivan ,  Thomas J. Kolze ,  Gottfried Ungerboeck ,  Nabil R. Yousef

IPC: H04B1/707

CPC classification number: H04B7/216 ,  H04B1/71 ,  H04B1/7102 ,  H04B1/7105 ,  H04B1/7107 ,  H04J13/0003 ,  H04J13/16

Abstract: A relatively straight-forward implemented, and computationally efficient approach of selecting a predetermined number of unused codes is used to perform weighted linear combination selectively with each of the input spread signals in a multiple access communication system. If desired, the predetermined number of unused codes is always the same in each implementation. Alternatively, the predetermined number of unused codes are selected from within a reordered code matrix using knowledge that is shared between the two ends of a communication system, such as between the CMs and a CMTS. While the context of an S-CDMA communication system having CMs and a CMTS is used, the solution is generally applicable to any communication system that seeks to cancel narrowband interference. Several embodiments are also described that show the generic applicability of the solution across a wide variety of systems.

Abstract translation: 使用选择预定数量的未使用代码的相对简单的实现和计算上有效的方法来在多址通信系统中选择性地与每个输入扩展信号执行加权线性组合。 如果需要，在每个实现中，预定数量的未使用代码总是相同的。 或者，使用在诸如CM和CMTS之间的通信系统的两端之间共享的知识，从重排序代码矩阵中选择预定数量的未使用代码。 虽然使用具有CM和CMTS的S-CDMA通信系统的上下文，但该解决方案通常适用于试图取消窄带干扰的任何通信系统。 还描述了几个实施例，其显示了解决方案在各种系统上的通用适用性。

公开(公告)号：US07099409B2

公开(公告)日：2006-08-29

申请号：US10075054

申请日：2002-02-13

Applicant: Nabil R. Yousef

Inventor： Nabil R. Yousef

IPC: H03D1/00 ,  H04L27/06

CPC classification number: H04L25/0236 ,  H04L2025/0349

Abstract: A novel approach of repeated adaptation is provided that can be applied to either one or both of channel estimation and/or equalization. From an incoming data packet that includes data and a training sequence, a modified data packet is generated that includes the data, the training sequence, and at least one additional copy of the training sequence. From the format of this modified data packet, the same training sequence can be used over and over again a desired number of times to perform channel estimation and subsequent calculation of equalizer tap coefficients. Alternatively, the same training sequence can be used over and over again a desired number of times to converge the equalizer coefficient taps directly without doing any preliminary channel estimation. Generally, either of these approaches can be characterized as a cyclic adaptation operation that provides improved performance without incurring any reduction in throughput of the communication channel.

Abstract translation: 提供了可以应用于信道估计和/或均衡中的一个或两者的重复适应的新颖方法。 从包括数据和训练序列的输入数据分组中，生成包括数据，训练序列和训练序列的至少一个附加副本的经修改的数据分组。 根据该修改的数据分组的格式，相同的训练序列可以一遍又一遍地使用所需次数，以执行信道估计和随后计算均衡器抽头系数。 或者，相同的训练序列可以一遍又一遍地使用期望次数，以直接收敛均衡器系数抽头，而不进行任何初步信道估计。 通常，这些方法之一可以被表征为循环适应操作，其提供改进的性能，而不会导致通信信道的吞吐量的任何降低。

公开(公告)号：US07068742B2

公开(公告)日：2006-06-27

申请号：US10214934

申请日：2002-08-07

Applicant: Nabil R. Yousef ,  Ali H. Sayed

Inventor： Nabil R. Yousef ,  Ali H. Sayed

IPC: H04L1/02 ,  H04B7/10

CPC classification number: H04L25/0212 ,  H04B1/1027 ,  H04B1/1081 ,  H04B7/005

Abstract: A method and apparatus that provides an accurate estimate of the time and amplitude of arrival of the first arriving overlapping multipath components (rays) in wireless locating finding systems. Overlapping fading multipath components for mobile-positioning are resolved by exploiting the fact that multipath components fade independently. Although fast channel fading is usually considered a challenge to the location finding process, it is used as an additional tool to detect and resolve overlapping multipath rays. A projection technique is also provided that exploits all possible a-priori channel information into a adaptive filtering algorithm, thus providing needed robustness to divergence of the adaptive algorithm that might result from possible severe data matrix ill-conditioning and high noise levels, which are common in wireless location applications.