专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20130322334A1 HARQ Buffer Size Reduction in Wireless Systems for Downlink Shared Channels 审中-公开
标题翻译：用于下行链路共享信道的无线系统中的HARQ缓冲区大小减少
公开(公告)号：US20130322334A1
公开(公告)日：2013-12-05
申请号：US13904023
申请日：2013-05-29
申请人： Nabil Yousef Wasily
发明人： Nabil Yousef Wasily
IPC分类号： H04W72/12
CPC分类号： H04W72/1284 , H04L1/0066 , H04L1/0067 , H04L1/1819 , H04L1/1835
摘要： A receiver arranged to process a flow of data in a communication system for downlink shared channels and a method for processing the flow of data sequence. The receiver includes a processor that receives a subframe comprising a data packet; a demapper that receives supplemental channel data symbols and is positioned after the processor in a sequence of the flow of data; means for performing rate matching of estimated the data symbols and positioned after the demapper in the data sequence; and a Hybrid Automatic Retransmission Request (HARQ) buffer positioned before the demapper in the data sequence. The communication system includes a long-term evolution (LTE) communication system.
摘要翻译：一种用于处理用于下行链路共享信道的通信系统中的数据流的接收机以及用于处理数据序列流的方法。接收机包括接收包括数据分组的子帧的处理器; 接收补充信道数据符号并位于数据流之后的处理器之后的解映射器; 用于执行估计的数据符号并位于数据序列中的解映射器之后的速率匹配的装置; 以及位于数据序列中的解映射器之前的混合自动重传请求（HARQ）缓冲器。通信系统包括长期演进（LTE）通信系统。

2. 发明授权

US08233534B2 Frame buffer compression and memory allocation in a video decoder 有权
标题翻译：视频解码器中的帧缓冲器压缩和存储器分配
公开(公告)号：US08233534B2
公开(公告)日：2012-07-31
申请号：US12757438
申请日：2010-04-09
申请人： Nabil Yousef Wasily
发明人： Nabil Yousef Wasily
IPC分类号： H04N7/01 , H04N9/80 , G06F15/16
CPC分类号： H04N19/573 , H04N19/124 , H04N19/152 , H04N19/157 , H04N19/172 , H04N19/426
摘要： Frame buffer video compression on an input video stream to efficiently allocate and utilize memory used for storing reference frames in a video decoder includes parsing a video header to obtain a maximum number of reference frames (N), dividing an available frame buffer memory to hold [N+1] compressed frames, controlling a compression process to limit a size of each frame such that said size is not less than a frame buffer memory size divided by [N+1], parsing messages that contain reference frames by looking ahead in an input video stream buffer of the input video stream, and allocating memory for compressing a given reference frame based on a number of needed frames at a frame buffer. A quantization of the compression process may be adjusted to improve a picture quality of the input video stream.
摘要翻译：输入视频流上的帧缓冲器视频压缩以有效地分配和利用用于在视频解码器中存储参考帧的存储器包括解析视频报头以获得最大数量的参考帧（N），将可用帧缓冲存储器分割成保持[ N + 1]个压缩帧，控制压缩处理以限制每个帧的大小，使得所述大小不小于除以[N + 1]划分的帧缓冲存储器大小，通过前瞻性地解析包含参考帧的消息输入视频流的输入视频流缓冲器，以及基于帧缓冲器处的所需帧数来分配用于压缩给定参考帧的存储器。可以调整压缩处理的量化以提高输入视频流的画面质量。

3. 发明授权

US08212942B2 All digital front-end architecture for television with sigma-delta ADC input 有权
标题翻译：所有数字前端架构，用于带Σ-ΔADC输入的电视机
公开(公告)号：US08212942B2
公开(公告)日：2012-07-03
申请号：US12760405
申请日：2010-04-14
申请人： Yongru Gu , Nabil Yousef Wasily
发明人： Yongru Gu , Nabil Yousef Wasily
IPC分类号： H04N5/44
CPC分类号： H04N5/52
摘要： A digital front-end architecture for television receivers with sigma-delta ADC input. An input digital signal is fed to the architecture and the gain is controlled by a gain stage. In the first method, the gain stage is controlled by a first AGC. Here, the gain is increased if the first threshold value is larger than the magnitude of a complex phase-locked loop (CPLL) output, and the gain is decreased if the first threshold value is lower than the magnitude of the CPLL output. In the second method, the gain is controlled through a second AGC. The gain is controlled by increasing the gain if the second threshold value is larger than a line peak of the moving average filter output, and the gain is decreased if the second threshold value is lower than the peak. The second threshold value and the peak are compared in a peak search block.
摘要翻译：具有Σ-ΔADC输入的电视接收机的数字前端架构。输入数字信号被馈送到架构，增益由增益级控制。在第一种方法中，增益级由第一AGC控制。这里，如果第一阈值大于复数锁相环（CPLL）输出的幅度，则增益增加，如果第一阈值低于CPLL输出的幅度，则增益减小。在第二种方法中，通过第二AGC来控制增益。如果第二阈值大于移动平均滤波器输出的线路峰值，则通过增加增益来控制增益，并且如果第二阈值低于峰值则增益减小。在峰值搜索块中比较第二阈值和峰值。

4. 发明授权

US08165230B2 Doppler frequency estimation in wireless communication systems 有权
标题翻译：无线通信系统中的多普勒频率估计
公开(公告)号：US08165230B2
公开(公告)日：2012-04-24
申请号：US12110602
申请日：2008-04-28
申请人： Ahmed Ragab , Nabil Yousef
发明人： Ahmed Ragab , Nabil Yousef
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L25/0224 , H04L27/2647
摘要： An apparatus and method for estimating Doppler frequency in a wireless communication network, wherein the method comprises determining a first correlation coefficient (c1) between a currently received Orthogonal Frequency Division Multiplexed (OFDM) symbol and an OFDM symbol received previous to the currently received OFDM symbol, and a second correlation coefficient (c2) between the currently received OFDM symbol and an OFDM symbol received immediately previous to the OFDM symbol received previous to the currently received OFDM symbol; performing a leaky integration across OFDM symbols of the resulting first and second correlation coefficients (c1, c2) to obtain an estimate of the first and second correlation coefficients; dividing the second correlation coefficient (c2) by the first correlation coefficient (c1) to obtain a correlation coefficient ratio; and using the correlation coefficient ratio as an estimate of the Doppler frequency in the wireless communication system.
摘要翻译：一种用于估计无线通信网络中的多普勒频率的装置和方法，其中所述方法包括确定当前接收的正交频分复用（OFDM）符号与在当前接收的OFDM符号之前接收的OFDM符号之间的第一相关系数（c1）以及当前接收的OFDM符号与在紧接在当前接收的OFDM符号之前接收的OFDM符号之前接收的OFDM符号之间的第二相关系数（c2）在所得到的第一和第二相关系数（c1，c2）的OFDM符号之间执行泄漏积分以获得第一和第二相关系数的估计; 将第二相关系数（c2）除以第一相关系数（c1）以获得相关系数比; 以及使用相关系数比作为无线通信系统中的多普勒频率的估计。

5. 发明授权

US07907637B2 Fast acquisition in mobile multimedia multicast systems 有权
标题翻译：在移动多媒体多播系统中快速获取
公开(公告)号：US07907637B2
公开(公告)日：2011-03-15
申请号：US12062734
申请日：2008-04-04
申请人： Nabil Yousef
发明人： Nabil Yousef
IPC分类号： H04B3/10
CPC分类号： H04L7/06 , H04N21/41407 , H04N21/6405
摘要： A technique of acquisition in a MediaFLO™ (Forward Link Only) mobile multimedia multicast system, wherein the method comprises receiving a superframe comprising a first digital symbol in a receiver operating in a first state of operation; assuming the first received digital symbol to be a Time Division Multiplexed (TDM) pilot symbol; calculating a first sparseness index of the first symbol; storing the first sparseness index; operating the receiver in a second state of operation; receiving a second digital symbol; calculating a second sparseness index for the second digital symbol; the receiver remaining in the second state of operation when the second sparseness index is greater than the first sparseness index, wherein the second digital symbol is assumed to be the TDM pilot symbol; and verifying that the last assumed TDM pilot symbol is the correct TDM pilot of the superframe.
摘要翻译：一种在MediaFLO TM（仅前向链路）移动多媒体多播系统中获取的技术，其中所述方法包括：接收在第一操作状态下操作的接收机中包含第一数字符号的超帧; 假设第一接收数字符号为时分多路复用（TDM）导频符号; 计算第一符号的第一稀疏度指数; 存储第一稀疏指数; 在第二操作状态下操作接收器; 接收第二数字符号; 计算第二数字符号的第二稀疏度指数; 当所述第二稀疏度指数大于所述第一稀疏度指标时，所述接收器保持在所述第二操作状态，其中，所述第二数字符号被假设为所述TDM导频符号; 并验证最后假设的TDM导频符号是超帧的正确TDM导频。

6. 发明申请

US20110002242A9 Sparse channel equalization 有权
标题翻译：稀疏信道均衡
公开(公告)号：US20110002242A9
公开(公告)日：2011-01-06
申请号：US10386795
申请日：2003-03-12
申请人： Randall Perlow , Nabil Yousef , Charles Brooks , Tianmin Liu
发明人： Randall Perlow , Nabil Yousef , Charles Brooks , Tianmin Liu
IPC分类号： H04B7/005
CPC分类号： H04L25/0218 , H04L25/03057 , H04L25/03987 , H04L2025/0349 , H04L2025/03617 , H04L2025/0377
摘要： Sparse channel equalization may be achieved by receiving a signal via a multi-path communication channel. The equalization then continues by extracting sparse information regarding the multiple path communication channel from the signal. Such sparse information generally indicates the position of the signals received via each of the multiple paths. The equalization then continues by estimating a channel response of the multiple path communication channel based on the sparse information. The equalization then continues by generating equalization taps (or coefficients) based on the channel response. The equalization then continues by equalizing the signal based on the equalization taps.
摘要翻译：可以通过经由多径通信信道接收信号来实现稀疏信道均衡。然后通过从信号中提取关于多路径通信信道的稀疏信息来继续均衡。这种稀疏信息通常表示通过多路径中的每一条接收到的信号的位置。然后通过基于稀疏信息估计多路径通信信道的信道响应来继续均衡。然后通过基于信道响应产生均衡抽头（或系数）来继续均衡。然后通过基于均衡抽头均衡信号来继续均衡。

7. 发明授权

US07855959B2 Fast common overhead services acquisition for MediaFLO 有权
标题翻译：针对MediaFLO的快速通用间接服务收购
公开(公告)号：US07855959B2
公开(公告)日：2010-12-21
申请号：US12110658
申请日：2008-04-28
申请人： Nabil Yousef
发明人： Nabil Yousef
IPC分类号： G01R31/08 , H04L1/00
CPC分类号： H04N21/6112 , H04N21/2362 , H04N21/41407 , H04N21/4381 , H04N21/44004 , H04N21/4828
摘要： A technique for fast common overhead services acquisition for MediaFLO™ mobile multimedia multicast system, wherein encoding overhead information symbol (OIS) information in a first burst of MLC of each superframe, OIS comprises control channel (CC) information and reserved flow data comprising primary flow data, service information data, notification flow data, configuration flow data, and presentation metadata; encoding padding in second MLC burst; encoding parity bytes in third and fourth MLC bursts; encoding primary flow data in final MLC burst per superframe; encoding the remaining reserved flow data at the end of superframe; transmitting wireless data stream comprising first MLC at ½ forward error correction (FEC) rate and receiving it in receiver; determining a correctness of CC information by checking cyclic redundancy check (CRC) bits at the end of each received data packet; and transmitter sending size wise remainder of reserved flows at the end of superframe.
摘要翻译：一种用于MediaFLO TM移动多媒体多播系统的快速常规开销服务采集的技术，其中在每个超帧的MLC的第一突发中编码开销信息符号（OIS）信息，OIS包括控制信道（CC）信息和包括主流的保留流数据数据，服务信息数据，通知流数据，配置流数据和呈现元数据; 在第二MLC突发中编码填充; 在第三和第四MLC突发中编码奇偶校验字节; 在每个超帧的最终MLC突发中编码主流数据; 在超帧结束时编码剩余的保留流数据; 以前向纠错（FEC）速率传输包括第一MLC的无线数据流并在接收机中接收它; 通过检查每个接收到的数据分组的结尾处的循环冗余校验（CRC）比特来确定CC信息的正确性; 并且发送器在超帧结束时发送大量明智的剩余保留流。

8. 发明授权

US07751309B2 WIC and LIC estimation in MediaFLO systems 有权
标题翻译： MediaFLO系统中的WIC和LIC估计
公开(公告)号：US07751309B2
公开(公告)日：2010-07-06
申请号：US12062758
申请日：2008-04-04
申请人： Nabil Yousef
发明人： Nabil Yousef
IPC分类号： H04J11/00
CPC分类号： H04L27/261 , H04L25/022 , H04L25/0224 , H04L27/2647
摘要： 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.
摘要翻译：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 / LIC符号的MediaFLO TM移动多媒体多播系统超帧的信号; 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。

9. 发明授权

US07710857B2 Coherent detection for differentially encoded OFDM systems 有权
标题翻译：差分编码OFDM系统的相干检测
公开(公告)号：US07710857B2
公开(公告)日：2010-05-04
申请号：US11766811
申请日：2007-06-22
申请人： Nabil Yousef
发明人： Nabil Yousef
IPC分类号： H04L27/28
CPC分类号： H04L27/2647 , H04L27/2075 , H04L27/2331
摘要： A method and system for coherent detection in which an OFDM symbol is multiplied by the complex conjugate of the previous OFDM symbol, which is obtained by one OFDM symbol delay and a complex conjugation circuit. This soft decision is passed through a QPSK slicer to obtain a hard decision. The soft decision is then divided by the hard decisions. The channel phase change between the two OFDM symbols is then obtained. For the first OFDM symbol, the channel is computed. A channel estimate for each ODFM symbol is computed from corresponding channel estimates and channel phase difference estimates. The channel phase difference between each two OFDM symbols is computed. The channel phase difference is passed through an exponent operation and multiplied by the soft decision to obtain a refined soft decision that is then passed through another QPSK slicer to obtain the final hard decision.
摘要翻译：一种用于相干检测的方法和系统，其中OFDM符号乘以由一个OFDM符号延迟获得的先前OFDM符号的复共轭和复共轭电路。该软判决通过QPSK限幅器获得硬判决。然后，软判决被硬决定划分。然后获得两个OFDM符号之间的信道相位变化。对于第一个OFDM符号，计算通道。从相应的信道估计和信道相位差估计计算每个ODFM符号的信道估计。计算每个OFDM符号之间的信道相位差。信道相位差通过指数运算并乘以软判决，以获得精细的软判决，然后通过另一QPSK限幅器传递以获得最终的硬判决。

10. 发明授权

US07697644B2 Stepped automatic gain control for OFDM systems 有权
标题翻译： OFDM系统的步进自动增益控制
公开(公告)号：US07697644B2
公开(公告)日：2010-04-13
申请号：US11565003
申请日：2006-11-30
申请人： Nabil Yousef , Aly Ismail , Edward Youssoufian
发明人： Nabil Yousef , Aly Ismail , Edward Youssoufian
IPC分类号： H04L27/08
CPC分类号： H03G3/3078 , H03G3/3068 , H04L27/2647
摘要： A system and method for performing stepped automatic gain control (AGC) for orthogonal-frequency-division-multiplexing (OFDM) applications comprises a radio frequency (RF) tuner and an OFDM demodulator operatively connected to the RF tuner, the OFDM demodulator comprising logic circuitry adapted to (i) detect OFDM symbols from a stream of data; (ii) detect boundaries of the OFDM symbols; (iii) detect a cyclic prefix duration of data values associated with the OFDM symbols; and (iv) provide a feedback to the RF tuner of the information pertaining to the boundaries of the OFDM symbols and the cyclic prefix duration.
摘要翻译：用于对正交频分复用（OFDM）应用执行步进式自动增益控制（AGC）的系统和方法包括射频（RF）调谐器和可操作地连接到RF调谐器的OFDM解调器，OFDM解调器包括逻辑电路适于（i）从数据流检测OFDM符号; （ii）检测OFDM符号的边界; （iii）检测与所述OFDM符号相关联的数据值的循环前缀持续时间; 以及（iv）向RF调谐器提供与OFDM符号的边界有关的信息和循环前缀持续时间的反馈。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式