公开(公告)号：US20050169361A1

公开(公告)日：2005-08-04

申请号：US11090611

申请日：2005-03-25

Applicant: Nabil Yousef ,  Ricardo Merched

Inventor： Nabil Yousef ,  Ricardo Merched

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

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

Abstract: Directly computing Feed Forward Equalizer (FFE) coefficients and Feed Back Equalizer (FBE) coefficients of a Decision Feedback Equalizer (DFE) from a channel estimate. The FBE coefficients have an energy constraint. A recursive least squares problem is formulated based upon the DFE configuration, the channel estimate, and the FBE energy constraint. The recursive least squares problem is solved to yield the FFE coefficients. The FFE coefficients are convolved with a convolution matrix that is based upon the channel estimate to yield the FBE coefficients. A solution to the recursive least squares problem is interpreted as a Kalman gain vector. A Kalman gain vector solution to the recursive least squares problem may be determined using a Fast Transversal Filter (FTF) algorithm.

Abstract translation: 从信道估计直接计算判决反馈均衡器（DFE）的前馈均衡器（FFE）系数和反馈均衡器（FBE）系数。 FBE系数具有能量约束。 基于DFE配置，信道估计和FBE能量约束来制定递归最小二乘问题。 求解递归最小二乘问题以产生FFE系数。 FFE系数与基于信道估计的卷积矩阵进行卷积以产生FBE系数。 递归最小二乘问题的解决方案被解释为卡尔曼增益向量。 可以使用快速横向滤波器（FTF）算法来确定递归最小二乘问题的卡尔曼增益向量解。

公开(公告)号：US07940864B2

公开(公告)日：2011-05-10

申请号：US12110637

申请日：2008-04-28

Applicant: Ricardo Merched ,  Nabil Yousef

Inventor： Ricardo Merched ,  Nabil Yousef

IPC: H04L27/00

CPC classification number: H04L25/0224 ,  H04L25/022 ,  H04L25/024 ,  H04L25/0244

Abstract: An apparatus and method of applying a fast algorithm to a pilot-based channel estimation process includes receiving, in a receiver, a signal comprising information bits transmitted in a wireless channel, executing a pilot-based channel estimation process running on a decision-directed turbo estimation procedure having a p structure for a vector of pilots and an upper bound N for a channel spread based on a feedback of detected information bits via OFDM, encoding the detected information bits, re-encoding the detected information bits at a decoder output, re-constructing and subtracting an ICI term from the received signal, modulating the detected information bits, estimating channel symbols in a per-carrier basis based on a diagonal matrix of a full matrix involved in the pilot-based channel estimation, and performing training of the wireless channel based on an entire vector of the channel symbols.

Abstract translation: 一种将快速算法应用于基于导频的信道估计过程的装置和方法包括在接收机中接收包括在无线信道中发送的信息比特的信号，执行在决策导向涡轮上运行的基于导频的信道估计过程 估计过程具有用于导频矢量的ap结构和用于通过OFDM的检测到的信息比特的反馈的信道扩展的上限N，对所检测的信息比特进行编码，在解码器输出处重新编码检测到的信息比特， 根据接收到的信号构造和减去ICI项，调制检测到的信息比特，基于在基于导频的信道估计中涉及的全矩阵的对角矩阵，以每载波为基础估计信道符号，以及执行无线 基于信道符号的整个向量的信道。

公开(公告)号：US20090323871A1

公开(公告)日：2009-12-31

申请号：US12110622

申请日：2008-04-28

Applicant: Ricardo Merched ,  Nabil Yousef

Inventor： Ricardo Merched ,  Nabil Yousef

IPC: H04B1/10

CPC classification number: H04L25/0244 ,  H04L5/0053 ,  H04L25/021 ,  H04L25/022 ,  H04L25/0236 ,  H04L25/0246 ,  H04L25/0248 ,  H04L25/025 ,  H04L25/0256 ,  H04L25/03171 ,  H04L27/2647

Abstract: An apparatus and method of applying a superfast algorithm to a pilot-based channel estimation process includes receiving a signal comprising information bits transmitted in a wireless channel, executing the pilot-based channel estimation process having p structures for a vector of pilot structures and an upper bound N for a channel spread, determining a result of a matrix inversion of a channel correlation matrix for an error channel estimation offline without performing a matrix inversion, storing pilot information of the received signal for channel recovery in a transform domain, representing the Toeplitz inverse by a FFT representation, detecting and estimating nonzero taps of a channel impulse response of the wireless channel, obtaining a non-structured minimum mean-square-error (MMSE) estimate as a first estimate of locations of the nonzero taps, and replacing the non-structured MMSE estimate by an estimate computed by a tap detection algorithm.

Abstract translation: 一种将超快速算法应用于基于导频的信道估计过程的装置和方法包括：接收包括在无线信道中发送的信息比特的信号，执行具有用于导频结构向量的p个结构的基于导频的信道估计过程， 绑定N用于信道扩展，确定用于误差信道估计的信道相关矩阵的矩阵求逆的结果，而不执行矩阵求逆，在变换域中存储用于信道恢复的接收信号的导频信息，表示Toeplitz反相 通过FFT表示，检测和估计无线信道的信道脉冲响应的非零抽头，获得非结构化最小均方误差（MMSE）估计作为非零抽头的位置的第一估计， 通过抽头检测算法计算的估计结果化MMSE估计。

公开(公告)号：US20090268803A1

公开(公告)日：2009-10-29

申请号：US12110637

申请日：2008-04-28

Applicant: Ricardo Merched ,  Nabil Yousef

Inventor： Ricardo Merched ,  Nabil Yousef

IPC: H04L27/01 ,  H04L27/28

CPC classification number: H04L25/0224 ,  H04L25/022 ,  H04L25/024 ,  H04L25/0244

Abstract: An apparatus and method of applying a fast algorithm to a pilot-based channel estimation process includes receiving, in a receiver, a signal comprising information bits transmitted in a wireless channel, executing a pilot-based channel estimation process running on a decision-directed turbo estimation procedure having a p structure for a vector of pilots and an upper bound N for a channel spread based on a feedback of detected information bits via OFDM, encoding the detected information bits, re-encoding the detected information bits at a decoder output, re-constructing and subtracting an ICI term from the received signal, modulating the detected information bits, estimating channel symbols in a per-carrier basis based on a diagonal matrix of a full matrix involved in the pilot-based channel estimation, and performing training of the wireless channel based on an entire vector of the channel symbols.

Abstract translation: 一种将快速算法应用于基于导频的信道估计过程的装置和方法包括在接收机中接收包括在无线信道中发送的信息比特的信号，执行在决策导向涡轮上运行的基于导频的信道估计过程 估计过程具有用于导频矢量的ap结构和用于通过OFDM的检测到的信息比特的反馈的信道扩展的上限N，对所检测的信息比特进行编码，在解码器输出处重新编码检测到的信息比特， 根据接收到的信号构造和减去ICI项，调制检测到的信息比特，基于在基于导频的信道估计中涉及的全矩阵的对角矩阵，以每载波为基础估计信道符号，以及执行无线 基于信道符号的整个向量的信道。

公开(公告)号：US20070293256A1

公开(公告)日：2007-12-20

申请号：US11471253

申请日：2006-06-20

Applicant: Ricardo Merched ,  Nabil Yousef

Inventor： Ricardo Merched ,  Nabil Yousef

IPC: H04B1/00 ,  H04B17/00

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：US07907683B2

公开(公告)日：2011-03-15

申请号：US12110622

申请日：2008-04-28

Applicant: Ricardo Merched ,  Nabil Yousef

Inventor： Ricardo Merched ,  Nabil Yousef

IPC: H04L27/00

CPC classification number: H04L25/0244 ,  H04L5/0053 ,  H04L25/021 ,  H04L25/022 ,  H04L25/0236 ,  H04L25/0246 ,  H04L25/0248 ,  H04L25/025 ,  H04L25/0256 ,  H04L25/03171 ,  H04L27/2647

Abstract: An apparatus and method of applying a superfast algorithm to a pilot-based channel estimation process includes receiving a signal comprising information bits transmitted in a wireless channel, executing the pilot-based channel estimation process having p structures for a vector of pilot structures and an upper bound N for a channel spread, determining a result of a matrix inversion of a channel correlation matrix for an error channel estimation offline without performing a matrix inversion, storing pilot information of the received signal for channel recovery in a transform domain, representing the Toeplitz inverse by a FFT representation, detecting and estimating nonzero taps of a channel impulse response of the wireless channel, obtaining a non-structured minimum mean-square-error (MMSE) estimate as a first estimate of locations of the nonzero taps, and replacing the non-structured MMSE estimate by an estimate computed by a tap detection algorithm.

Abstract translation: 一种将超快速算法应用于基于导频的信道估计过程的装置和方法包括：接收包括在无线信道中发送的信息比特的信号，执行具有用于导频结构向量的p个结构的基于导频的信道估计过程， 绑定N用于信道扩展，确定用于误差信道估计的信道相关矩阵的矩阵求逆的结果，而不执行矩阵求逆，在变换域中存储用于信道恢复的接收信号的导频信息，表示Toeplitz反相 通过FFT表示，检测和估计无线信道的信道脉冲响应的非零抽头，获得非结构化最小均方误差（MMSE）估计作为非零抽头的位置的第一估计， 通过抽头检测算法计算的估计结构化MMSE估计。

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：US08000395B2

公开(公告)日：2011-08-16

申请号：US11440298

申请日：2006-05-24

Applicant: Nabil Yousef

Inventor： Nabil Yousef

IPC: H04N7/18

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：US07804846B2

公开(公告)日：2010-09-28

申请号：US12124387

申请日：2008-05-21

Applicant: Samer Sarhan ,  Nabil Yousef

Inventor： Samer Sarhan ,  Nabil Yousef

IPC: H04J3/00

CPC classification number: H04L1/0079 ,  H04L5/0048

Abstract: Finding errors in the fragment headers of the fragments of service layer packets without depending on the erasure indicators of Medium Access Channel (MAC) layer packets of a wireless signal in a wireless communication system includes determining if length of the fragment header is between 121 and 127; determining if length of the fragment header is equal to 127, and if the fragment header is not the last fragment header in a service layer packet being formed; determining if summation of length of the fragment header for a value N is greater than 122 subtracted by number of fragments collected from a MAC layer packet including fragment header; and determining if fragment header is not the last fragment header in the service layer packet being formed, and if fragment header length is less than residual number of bytes in the MAC layer packet.

Abstract translation: 在不依赖于无线通信系统中的无线信号的介质访问信道（MAC）层分组的擦除指示符的情况下，在服务层分组的分段报头中查找错误包括确定分段报头的长度是否在121和127之间 ; 确定片段头的长度是否等于127，并且如果片段头不是正在形成的服务层包中的最后片段头; 根据从包含片段头的MAC层包收集的片段数，确定值N的片段头的长度的和是否大于122; 以及确定片段头不是正在形成的服务层分组中的最后片段头，并且如果片段头长度小于MAC层分组中的残留字节数。

公开(公告)号：US07782982B2

公开(公告)日：2010-08-24

申请号：US11923682

申请日：2007-10-25

Applicant: Nabil Yousef

Inventor： Nabil Yousef

IPC: H03D1/24

CPC classification number: H04L25/067 ,  H04L1/0054 ,  H04L1/0071 ,  H04L25/03248 ,  H04L25/03286 ,  H04L25/03318 ,  H04L2025/0342

Abstract: A receiver for use in a wireless network comprising a communications channel and a method of allocating deinterleaver memory usage in the receiver, wherein the receiver comprises a processor adapted to organize subchannels of the communications channel and set a number (N) of data bits per soft decision, wherein the soft decision is represented by N data bits; an address decoder adapted to decode the subchannels; a demapper adapted to receive QAM symbols and demap the QAM symbols to soft decisions; a deinterleaver adapted to perform deinterleaving on the soft decisions, wherein the deinterleaver comprises a memory component having a storage size that is a function of the number (N) of bits per soft decision; and a Viterbi decoder adapted to decode the deinterleaved soft decisions.

Abstract translation: 一种在包括通信信道的无线网络中使用的接收机以及在所述接收机中分配解交织器存储器使用的方法，其中所述接收机包括处理器，其适于组织所述通信信道的子信道并且设置每个软件的数目（N）个数据位 决定，其中所述软判决由N个数据位表示; 地址解码器，其适于解码所述子信道; 解映射器，适于接收QAM符号并将QAM符号解映射为软判决; 解交织器，其适于对所述软判决执行去交织，其中所述解交织器包括存储器组件，所述存储器组件具有作为每个软判决的位数（N）的函数的存储大小; 以及适于对解交织的软判决进行解码的维特比解码器。