公开(公告)号：US20080317022A1

公开(公告)日：2008-12-25

申请号：US11766816

申请日：2007-06-22

Applicant: Elsayed Ahmed ,  Nabil Yousef

Inventor： Elsayed Ahmed ,  Nabil Yousef

IPC: H04L12/56

CPC classification number: H04L7/048 ,  H04H40/18 ,  H04H60/11 ,  H04L1/0045 ,  H04L1/0079 ,  H04L69/22

Abstract: FEC frame synchronization in a DAB-IP system comprising FEC frames includes receiving FEC packets each comprising a FEC packet header and a FEC data field comprising padding bytes at an end of a last FEC packet received; comparing a received FEC packet header with a known FEC packet header until a number of bit errors in the received FEC packet header is less than or equal to a predetermined amount; and matching the received FEC packet header and the padding bytes until at least one of the following actions occur thereby resulting in receiver locking: a number of successive FEC packet headers mismatches in the received FEC packet header; a predetermined number of FEC packets end without padding matching; and FEC packet header and padding matching occurs. The received FEC packets are tracked after receiver locking has occurred to ensure FEC parity packets are positioned properly in the FEC frames.

Abstract translation: 包括FEC帧的DAB-IP系统中的FEC帧同步包括接收每个包括FEC分组报头的FEC分组和包括在接收的最后FEC分组的末尾的填充字节的FEC数据字段; 将接收到的FEC分组报头与已知FEC分组报头进行比较，直到接收的​​FEC分组报头中的位错误数量小于或等于预定量; 并且匹配接收到的FEC分组报头和填充字节，直到发生以下动作中的至少一个，从而导致接收器锁定：接收的FEC分组报头中的多个连续的FEC分组报头不匹配; 预定数量的FEC分组结束而不进行填充匹配; 并且发生FEC分组报头和填充匹配。 在发生接收机锁定之后跟踪接收的FEC分组，以确保FEC奇偶校验分组在FEC帧中正确定位。

公开(公告)号：US08599933B2

公开(公告)日：2013-12-03

申请号：US11924628

申请日：2007-10-26

Applicant: Elsayed Ahmed ,  Nabil Yousef

Inventor： Elsayed Ahmed ,  Nabil Yousef

IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04

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）队列中开始复位状态，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：US07940759B2

公开(公告)日：2011-05-10

申请号：US11766816

申请日：2007-06-22

Applicant: Elsayed Ahmed ,  Nabil Yousef

Inventor： Elsayed Ahmed ,  Nabil Yousef

IPC: H04L12/56

CPC classification number: H04L7/048 ,  H04H40/18 ,  H04H60/11 ,  H04L1/0045 ,  H04L1/0079 ,  H04L69/22

Abstract: FEC frame synchronization in a DAB-IP system comprising FEC frames includes receiving FEC packets each comprising a FEC packet header and a FEC data field comprising padding bytes at an end of a last FEC packet received; comparing a received FEC packet header with a known FEC packet header until a number of bit errors in the received FEC packet header is less than or equal to a predetermined amount; and matching the received FEC packet header and the padding bytes until at least one of the following actions occur thereby resulting in receiver locking: a number of successive FEC packet headers mismatches in the received FEC packet header; a predetermined number of FEC packets end without padding matching; and FEC packet header and padding matching occurs. The received FEC packets are tracked after receiver locking has occurred to ensure FEC parity packets are positioned properly in the FEC frames.

Abstract translation: 包括FEC帧的DAB-IP系统中的FEC帧同步包括接收每个包括FEC分组报头的FEC分组和包括在接收的最后FEC分组的末尾的填充字节的FEC数据字段; 将接收到的FEC分组报头与已知FEC分组报头进行比较，直到接收的​​FEC分组报头中的位错误数量小于或等于预定量; 并且匹配接收到的FEC分组报头和填充字节，直到发生以下动作中的至少一个，从而导致接收器锁定：接收的FEC分组报头中的多个连续的FEC分组报头不匹配; 预定数量的FEC分组结束而不进行填充匹配; 并且发生FEC分组报头和填充匹配。 在发生接收机锁定之后跟踪接收的FEC分组，以确保FEC奇偶校验分组在FEC帧中正确定位。

公开(公告)号：US08005173B2

公开(公告)日：2011-08-23

申请号：US12124389

申请日：2008-05-21

Applicant: Elsayed Ahmed Elsayed ,  Nabil Yousef

Inventor： Elsayed Ahmed Elsayed ,  Nabil Yousef

IPC: H03D1/00 ,  H04L7/00

CPC classification number: H04L27/2675 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2659

Abstract: A method of estimating a coarse frequency offset of Digital Multimedia Broadcasting (DMB) transmission frames includes receiving the DMB transmission frames including a synchronization channel having a phase reference symbol, circularly shifting the phase reference symbol by applying a circular shift to the phase reference symbol, numerically correlating the circularly shifted phase reference symbol with a known correct phase reference symbol to obtain a highest peak and a side peaks of the numeric correlation, and computing a phase reference symbol angle based on a multiplication of the peak and a carrier spacing of the DMB transmission frames. The peak is determined when the circularly shifted phase reference symbol is equal to the known correct phase reference symbol. The peak and side peaks corresponding to the peak are operated in a range of a maximum value of the circular shift.

Abstract translation: 估计数字多媒体广播（DMB）传输帧的粗频偏移的方法包括：接收包括具有相位参考符号的同步信道的DMB传输帧，通过对相位参考符号进行循环移位来循环移位相位参考符号， 将循环相移参考符号与已知的正确相位参考符号数值相关以获得数值相关的最高峰值和侧峰值，并且基于DMB的峰值和载波间隔的乘法来计算相位参考符号角度 传输帧。 当循环相位参考符号等于已知的正确相位参考符号时，确定峰值。 对应于峰值的峰值和侧峰值在循环移位的最大值的范围内操作。

公开(公告)号：US20090290663A1

公开(公告)日：2009-11-26

申请号：US12124389

申请日：2008-05-21

Applicant: Elsayed Ahmed Elsayed ,  Nabil Yousef

Inventor： Elsayed Ahmed Elsayed ,  Nabil Yousef

IPC: H04L27/06

CPC classification number: H04L27/2675 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2659

Abstract: A method of estimating a coarse frequency offset of Digital Multimedia Broadcasting (DMB) transmission frames includes receiving the DMB transmission frames including a synchronization channel having a phase reference symbol, circularly shifting the phase reference symbol by applying a circular shift to the phase reference symbol, numerically correlating the circularly shifted phase reference symbol with a known correct phase reference symbol to obtain a highest peak and a side peaks of the numeric correlation, and computing a phase reference symbol angle based on a multiplication of the peak and a carrier spacing of the DMB transmission frames. The peak is determined when the circularly shifted phase reference symbol is equal to the known correct phase reference symbol. The peak and side peaks corresponding to the peak are operated in a range of a maximum value of the circular shift.

Abstract translation: 估计数字多媒体广播（DMB）传输帧的粗频偏移的方法包括：接收包括具有相位参考符号的同步信道的DMB传输帧，通过对相位参考符号进行循环移位来循环移位相位参考符号， 将循环相移参考符号与已知的正确相位参考符号数值相关以获得数值相关的最高峰值和侧峰值，并且基于DMB的峰值和载波间隔的乘法来计算相位参考符号角度 传输帧。 当循环相位参考符号等于已知的正确相位参考符号时，确定峰值。 对应于峰值的峰值和侧峰值在循环移位的最大值的范围内操作。

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：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：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：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。