公开(公告)号：US20090252027A1

公开(公告)日：2009-10-08

申请号：US12062758

申请日：2008-04-04

Applicant: Nabil Yousef

Inventor： Nabil Yousef

IPC: H04J11/00

CPC classification number: H04L27/261 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/2647

Abstract: An apparatus and method for WIC/LIC estimation without channel mode construction in a MediaFLO™ system comprising a receiver, a transmitter and transmission channel, wherein the method comprises receiving a signal comprising a MediaFLO™ mobile multimedia multicast system superframe comprising WIC/LIC symbols; setting a first sparseness index value of the digital signal to zero; setting a local copy WIC/LIC number of the digital signal to one; generating a local copy of all possible values of the WIC/LIC symbols corresponding to a WID/LID value from zero to fifteen; dividing the received WIC/LIC symbol values by a local copy WIC/LIC value corresponding to WIC/LIC number one; performing an IFFT of all the possible values of the WIC and LIC symbols; calculating a second sparseness index value of the IFFT of sixteen possible values of the WIC/LIC symbols; and extracting a WIC/LIC symbol from the digital signal corresponding to the second sparseness index.

Abstract translation: 一种用于在包括接收机，发射机和传输信道的MediaFLO TM系统中不使用信道模式构造的WIC / LIC估计的装置和方法，其中所述方法包括接收包括包括WIC的MediaFLO TM移动多媒体多播系统超帧的信号 / LIC符号; 将数字信号的第一稀疏度索引值设置为零; 将本地副本WIC / LIC数字信号设置为1; 生成对应于WID / LID值的WIC / LIC符号的所有可能值的本地副本从零到十五; 将所接收的WIC / LIC符号值除以对应于WIC / LIC第一的本地拷贝WIC / LIC值; 执行WIC和LIC符号的所有可能值的IFFT; 计算WIC / LIC符号的十六个可能值的IFFT的第二稀疏度指数值; 以及从对应于第二稀疏度指数的数字信号中提取WIC / LIC符号。

公开(公告)号：US20090110082A1

公开(公告)日：2009-04-30

申请号：US11924628

申请日：2007-10-26

Applicant: Elsayed Ahmed ,  Nabil Yousef

Inventor： Elsayed Ahmed ,  Nabil Yousef

IPC: H04N7/24

CPC classification number: H04N7/52 ,  H04N21/434

Abstract: One embodiment provides a method of performing packet identifier (PID) filtering of a digital video broadcasting-handheld (DVB-H) transport stream and includes processing a PID and a continuity counter (CC) sequence of the DVB-H transport stream, computing a number of mismatched bits between the PID and a desired PID, proceeding to a start of a reset state on a first-in-first-out (FIFO) queue of the DVB-H transport stream when a FIFO buffer becomes full, determining if a number of mismatched bits of a first packet in the FIFO buffer is less than a first threshold value, and proceeding to a start of a run algorithm state only if the number of mismatched bits of the first packet in the FIFO buffer is less than the first threshold value and if there is a valid CC sequence that includes the first packet.

Abstract translation: 一个实施例提供了一种执行数字视频广播手持（DVB-H）传输流的分组标识符（PID）滤波的方法，并且包括处理DVB-H传输流的PID和连续性计数器（CC）序列，计算 PID和所需PID之间的不匹配位的数量，当FIFO缓冲器变满时，在DVB-H传输流的先进先出（FIFO）队列中进入复位状态的开始，确定是否 FIFO缓冲器中的第一分组的不匹配比特数小于第一阈值，并且仅当FIFO缓冲器中的第一分组的不匹配比特的数量少于第一阈值的数量时才进入运行算法状态的开始 并且如果存在包括第一分组的有效CC序列。

公开(公告)号：US07424062B2

公开(公告)日：2008-09-09

申请号：US11471253

申请日：2006-06-20

Applicant: Ricardo Merched ,  Nabil Yousef

Inventor： Ricardo Merched ,  Nabil Yousef

IPC: H04K1/10

CPC classification number: H04L27/3854 ,  H04B17/309 ,  H04L27/2602

Abstract: A receiver and method of enhancing transmitted data signals in a wireless communications system includes wirelessly transmitting and receiving a data signal over a wireless channel in the communications system; providing known channel parameters corresponding to the wireless channel; expressing the data signal as an input data vector; replacing indexes in the input data vector having a magnitude greater than one into indexes in the input data vector having a unit norm; creating an output data vector; and calculating a dot product of (i) the input data vector comprising replaced indexes; and (ii) the output data vector, wherein the calculating process equalizes the data signal received by a receiver in the presence of Doppler frequency shifts of the data signal.

Abstract translation: 一种在无线通信系统中增强发射数据信号的接收机和方法包括：在通信系统中通过无线信道无线地发射和接收数据信号; 提供对应于无线信道的已知信道参数; 将数据信号表示为输入数据矢量; 将具有大于1的幅度的输入数据向量中的索引替换为具有单位范数的输入数据向量中的索引; 创建输出数据向量; 并计算（i）包括替代索引的输入数据矢量的点积; 和（ii）所述输出数据矢量，其中所述计算处理在数据信号的多普勒频移的存在下均衡由接收机接收的数据信号。

公开(公告)号：US20080159279A1

公开(公告)日：2008-07-03

申请号：US11615305

申请日：2006-12-27

Applicant: Waleed Younis ,  Nabil Yousef

Inventor： Waleed Younis ,  Nabil Yousef

IPC: H04L12/56

CPC classification number: H04N21/64315 ,  H04H20/95 ,  H04H40/18 ,  H04N21/23608 ,  H04N21/41407 ,  H04N21/4344 ,  H04N21/6131

Abstract: Transmitting data in a digital video broadcasting for handheld (DVB-H) receiver comprises a transport stream (TS) demultiplexer adapted to extract internet protocol (IP) datagrams from TS data packets; a packet identifier (PID) filter adapted to extract the TS data packets based on the PIDs of the TS data packets; a Multi Protocol Encapsulation-Forward Error Correction (MPE-FEC) random access memory (RAM) unit operatively connected to the TS demultiplexer; a Reed-Solomon decoder operatively connected to the MPE-FEC RAM unit; an IP to TS encapsulator operatively connected to the MPE-FEC RAM unit; a TS multiplexer operatively connected to each of the PID filter and the IP to TS encapsulator, wherein the TS multiplexer is adapted to combine both DVB-Terrestrial (DVB-T) and DVB-H TS data packets into a single combined TS data packet; and a host interface operatively connected to the TS multiplexer.

Abstract translation: 用于手持（DVB-H）接收机的数字视频广播中的传输数据包括适于从TS数据分组提取互联网协议（IP）数据报的传输流（TS）解复用器; 分组标识符（PID）滤波器，其适于基于所述TS数据分组的PID提取所述TS数据分组; 可操作地连接到TS解复用器的多协议封装前向纠错（MPE-FEC）随机存取存储器（RAM）单元; 可操作地连接到MPE-FEC RAM单元的Reed-Solomon解码器; 可操作地连接到MPE-FEC RAM单元的IP到TS封装器; 一个TS复用器，可操作地连接到每个PID过滤器和IP至TS封装器，其中TS多路复用器适于将DVB-地面（DVB-T）和DVB-H TS数据分组组合成单个组合的TS数据分组; 以及可操作地连接到TS多路复用器的主机接口。

公开(公告)号：US20070291864A1

公开(公告)日：2007-12-20

申请号：US11471187

申请日：2006-06-20

Applicant: Jun Ma ,  Nabil Yousef

Inventor： Jun Ma ,  Nabil Yousef

IPC: H04L23/02 ,  H04L5/12

CPC classification number: H04L25/067 ,  H04L1/0041 ,  H04L1/0052 ,  H04L1/0054 ,  H04L1/006 ,  H04L1/0071 ,  H04L27/34 ,  H04L27/38

Abstract: A DVB-H bit-interleave coded modulation/demodulation system and method includes a convolutional encoder; an interleaver operatively connected to the convolutional encoder; a quadrature amplitude modulation (QAM) mapper operatively connected to the interleaver; a channel component operatively connected to the QAM mapper; a QAM demapper operatively connected to the channel component; a de-interleaver operatively connected to the QAM demapper; and a Viterbi decoder operatively connected to the de-interleaver. Preferably, the interleaver comprises a bit-wise interleaver and a symbol-wise interleaver operatively connected to the bit-wise interleaver. Preferably, the de-interleaver comprises a bit-wise de-interleaver; and a symbol-wise de-interleaver operatively connected to the bit-wise de-interleaver. The de-interleaver may be adapted to decode a soft decision metric for any of a QPSK, 16 QAM, and 64 QAM modulation. The de-interleaver may be adapted to decode a soft decision metric computation comprising a log-likelihood ratio soft decision metric of a binary bit stream of a signal.

Abstract translation: DVB-H位交织编码调制/解调系统和方法包括卷积编码器; 可操作地连接到卷积编码器的交织器; 可操作地连接到交织器的正交幅度调制（QAM）映射器; 可操作地连接到QAM映射器的信道分量; 可操作地连接到信道分量的QAM解映射器; 可操作地连接到QAM解映射器的解交织器; 以及可操作地连接到解交织器的维特比解码器。 优选地，交织器包括可操作地连接到逐位交织器的逐位交织器和符号方式的交织器。 优选地，解交织器包括位逐去交织器; 以及可操作地连接到逐位解交织器的符号式解交织器。 解交织器可以适于解码用于QPSK，16QAM和64QAM调制中的任何一个的软判决度量。 解交织器可以适于解码包括信号的二进制比特流的对数似然比软判决度量的软判决度量计算。

公开(公告)号：US20070277210A1

公开(公告)日：2007-11-29

申请号：US11440298

申请日：2006-05-24

Applicant: Nabil Yousef

Inventor： Nabil Yousef

IPC: H04N7/173

CPC classification number: H04N21/64315 ,  H04N21/23655 ,  H04N21/2381 ,  H04N21/2389 ,  H04N21/4385

Abstract: A DVB-H transmitter having a plurality of video encoders each having a variable bit rate associated with IP datagrams for each television program broadcast by one RF channel. A method is also provided for statistical multiplexing of video channels for DVB-H mobile TV applications, wherein the method includes jointly configuring a plurality of video encoders each having a variable bit rate associated with IP datagrams for each television program broadcast by one RF channel.

Abstract translation: 具有多个视频编码器的DVB-H发射机，每个视频编码器具有与由一个RF信道广播的每个电视节目的IP数据报相关联的可变比特率。 还提供了一种用于DVB-H移动TV应用的视频信道的统计复用的方法，其中该方法包括联合配置多个视频编码器，每个视频编码器具有与由一个RF信道广播的每个电视节目的IP数据报相关联的可变比特率。

公开(公告)号：US20070140321A1

公开(公告)日：2007-06-21

申请号：US11604483

申请日：2006-11-27

Applicant: Nabil Yousef ,  Thomas Kolze

Inventor： Nabil Yousef ,  Thomas Kolze

IPC: H04B1/00

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

Abstract: Successive interference canceling for CMDA. ICI may result from a signal's multi-path effects, or by filtering/suppression of some of the component energy of the signaling waveforms. Energy component attenuation destroys orthogonality of CDMA symbols thereby causing ICI. An ICF suppresses frequency domain portions (attenuates ingress), but also introduces ICI. Following the ICF, the signal is de-spread sliced, re-spread and convolved with the ICF echoes (except first tap echoes). Convolving re-spread hard decisions with delayed ICF taps is equivalent to partially re-modulating the first-pass hard decisions to efficiently “add-back-in” the signal energy which was blanked/subtracted by the ICF. Alternatively, parameter estimation de-rotates and re-rotates soft symbols and hard decisions, respectively compensating for undesirable symbol rotation. The convolved signal is subtracted from a delayed version of the ICF output signal. If desired, this process may be repeated successively to enhance the accuracy of the obtained data decisions in the next stage

Abstract translation: CMDA的连续干扰消除。 ICI可能由信号的多路径效应，或通过滤波/抑制信号波形的一些分量能量产生。 能量分量衰减破坏了CDMA符号的正交性，从而导致ICI。 ICF抑制频域部分（衰减入口），但也引入了ICI。 在ICF之后，信号被解扩展，重新扩展并与ICF回波卷积（除了第一抽头回波）。 用延迟的ICF抽头卷积重新扩展硬判决相当于部分重新调制首次硬判决，以有效地“加入”ICF消隐/减去的信号能量。 或者，参数估计解除旋转并重新旋转软符号和硬判决，分别补偿不期望的符号旋转。 从ICF输出信号的延迟版本中减去卷积信号。 如果需要，可以连续地重复该过程，以提高在下一阶段获得的数据决定的准确性

公开(公告)号：US20070053470A1

公开(公告)日：2007-03-08

申请号：US11592286

申请日：2006-11-02

Applicant: Nabil Yousef ,  Jun Ma ,  Jonathan Min

Inventor： Nabil Yousef ,  Jun Ma ,  Jonathan 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：US20070014334A1

公开(公告)日：2007-01-18

申请号：US11522837

申请日：2006-09-18

Applicant: Bruce Currivan ,  Thomas Kolze ,  Gottfried Ungerboeck ,  Nabil Yousef

Inventor： Bruce Currivan ,  Thomas Kolze ,  Gottfried Ungerboeck ,  Nabil 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：US20050041760A1

公开(公告)日：2005-02-24

申请号：US10956172

申请日：2004-10-01

Applicant: Nabil Yousef

Inventor： Nabil Yousef

IPC: H04L1/06 ,  H04L25/03 ,  H03K5/159 ,  H04B1/10

CPC classification number: H04L1/06 ,  H04L25/03057 ,  H04L2025/0349 ,  H04L2025/03605

Abstract: A Decision Feedback Equalizer (DFE) system includes a DFE and a DFE coefficients processor. The DFE receives an uncompensated signal and operates upon the uncompensated input using DFE coefficients to produce an equalized output. The DFE coefficients processor formulates a channel estimate as a convolution matrix H. The DFE coefficients processor determines a Feed Back Equalizer (FBE) energy constraint based upon the channel estimate. The DFE coefficients processor relates the convolution matrix H to the DFE coefficients in a matrix format equation, the matrix format equation based upon the structure of the DFE, the convolution matrix, an expected output of the DFE, and the FBE energy constraint. The DFE coefficients processor formulates a recursive least squares solution to the matrix format equation and computes the recursive least squares solution to the matrix format equation to yield the DFE coefficients.

Abstract translation: 判决反馈均衡器（DFE）系统包括DFE和DFE系数处理器。 DFE接收未补偿的信号，并使用DFE系数对未补偿的输入进行操作，以产生均衡的输出。 DFE系数处理器将信道估计器形成为卷积矩阵H.DFE系数处理器基于信道估计来确定反馈均衡器（FBE）能量约束。 DFE系数处理器将卷积矩阵H与矩阵格式方程式中的DFE系数相关，基于DFE的结构，卷积矩阵，DFE的预期输出和FBE能量约束的矩阵格式方程。 DFE系数处理器为矩阵格式方程式制定递归最小二乘解，并计算矩阵格式方程的递归最小二乘解，得到DFE系数。