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193 条记录 (耗时 0.052 秒)

    Joint estimation of channel and preamble sequence for orthogonal frequency division multiplexing systems
    61.
    发明授权
    Joint estimation of channel and preamble sequence for orthogonal frequency division multiplexing systems 有权
    正交频分复用系统的信道和前导序列的联合估计

    公开(公告)号：US08320508B1

    公开(公告)日：2012-11-27

    申请号：US13214817

    申请日：2011-08-22

    申请人： Jungwon Lee ,  Hui-Ling Lou

    发明人： Jungwon Lee ,  Hui-Ling Lou

    IPC分类号： H04L27/06

    CPC分类号： H04L25/022 ,  H04L25/0224 ,  H04L27/261

    摘要： A system including an estimation module, a processing module, and a control module. The estimation module is configured to generate a first set of channel estimates for a plurality of subcarriers of a received signal. The processing module is configured to generate a second set of channel estimates for the plurality of subcarriers, in which the second set of channel estimates are generated based on the first set of channel estimates. The control module is configured to estimate a preamble sequence in the received signal based on each of (i) the first set of channel estimates and (ii) the second set of channel estimates.

    摘要翻译： 一种包括估计模块，处理模块和控制模块的系统。 估计模块被配置为生成接收信号的多个子载波的第一组信道估计。 处理模块被配置为生成多个子载波的第二组信道估计，其中基于第一组信道估计来生成第二组信道估计。 控制模块被配置为基于（i）第一组信道估计和（ii）第二组信道估计中的每一个来估计接收信号中的前导码序列。

    Symbol vector-level combining receiver for incremental redundancy HARQ with MIMO
    63.
    发明授权
    Symbol vector-level combining receiver for incremental redundancy HARQ with MIMO 有权
    符号矢量级组合接收机，用于增量冗余HARQ与MIMO

    公开(公告)号：US08271861B2

    公开(公告)日：2012-09-18

    申请号：US12463025

    申请日：2009-05-08

    申请人： Jungwon Lee ,  Yakun Sun ,  Hui-Ling Lou

    发明人： Jungwon Lee ,  Yakun Sun ,  Hui-Ling Lou

    IPC分类号： H03M13/03

    CPC分类号： H04B7/024 ,  H04B7/0413 ,  H04L1/0042 ,  H04L1/0068 ,  H04L1/0643 ,  H04L1/1819

    摘要： Techniques are provided for transmitting and receiving a mother code in an incremental redundancy hybrid automatic repeat-request protocol. A set of information bits corresponding to a message is encoded and interleaved to produce the mother code. Each bit position of the mother code is mapped to an output symbol, and each output symbol is mapped to an antenna for transmission. One or more transmissions are performed, where each transmission includes puncturing the mother code by selecting one or more symbols from the output symbols, and transmitting each symbol in the one or more symbols on an antenna corresponding to that symbol. The mother code is decoded, in part, by determining combinable bits contained within a set of received symbols and computing one or more log-likelihood ratio values corresponding to each symbol in the set of received symbols.

    摘要翻译： 提供了用于以增量冗余混合自动重复请求协议发送和接收母码的技术。 与消息相对应的一组信息位被编码和交织以产生母码。 母码的每个比特位置被映射到输出符号，并且每个输出符号被映射到用于发送的天线。 执行一个或多个传输，其中每个传输包括通过从输出符号中选择一个或多个符号并且在与该符号相对应的天线上的一个或多个符号中发送每个符号来对母码进行穿孔。 部分地通过确定包含在一组接收到的符号中的可组合比特并且计算与所接收的符号集合中的每个符号相对应的一个或多个对数似然比值来对母码进行解码。

    PSEUDO-OMNI-DIRECTIONAL BEAMFORMING WITH MULTIPLE NARROW-BAND BEAMS
    64.
    发明申请
    PSEUDO-OMNI-DIRECTIONAL BEAMFORMING WITH MULTIPLE NARROW-BAND BEAMS 有权
    PSEUDO-OMNI-DIRECTIONAL BEAMFORMING WITH MULTILELE NARROW-BAND BEAMS

    公开(公告)号：US20120202548A1

    公开(公告)日：2012-08-09

    申请号：US13451257

    申请日：2012-04-19

    申请人： Jungwon Lee ,  Hui-Ling Lou

    发明人： Jungwon Lee ,  Hui-Ling Lou

    IPC分类号： H04W72/08 ,  H01Q3/00

    CPC分类号： H04W24/10 ,  H04B7/0408 ,  H04B7/0617 ,  H04B7/0632 ,  H04W16/28

    摘要： In a technique for communication with a station on a wireless network, the technique includes forming a plurality of narrow-band beams, each having a different angular direction from an antenna of a base station and collectively distributed over a beamspace to form a pseudo-omni-directional beam pattern. That beamspace may span an entire spherical region or a portion thereof, for example, when the narrow-band beams are broadcast over a sector of an entire spherical region. The technique may assign each of the plurality of narrow-band beams to a different frequency band (such as a different channel band or sub-channel) on the wireless network. The technique may simultaneously broadcast the plurality of narrow-band beams in a time-varying manner such that the angular direction of each of the plurality of narrow-band beams varies with time, where that variation may be random or ordered.

    摘要翻译： 在用于与无线网络上的站通信的技术中，该技术包括形成多个窄带波束，每个窄带波束具有与基站的天线不同的角度方向，并且共同分布在波束空间上以形成伪全波段 方向光束图案。 该波束空间可以跨越整个球形区域或其一部分，例如当窄带波束在整个球形区域的扇区上广播时。 该技术可以将多个窄带波束中的每一个分配给无线网络上的不同频带（例如，不同的信道频带或子信道）。 该技术可以以时变方式同时广播多个窄带波束，使得多个窄带波束中的每一个的角度方向随时间变化，其中该变化可以是随机的或有序的。

    Frame synchronization method and apparatus
    65.
    发明授权
    Frame synchronization method and apparatus 有权
    帧同步方法和装置

    公开(公告)号：US07995666B1

    公开(公告)日：2011-08-09

    申请号：US12899928

    申请日：2010-10-07

    申请人： Qing Zhao ,  Jungwon Lee ,  Leilei Song ,  Songping Wu ,  Hui-Ling Lou

    发明人： Qing Zhao ,  Jungwon Lee ,  Leilei Song ,  Songping Wu ,  Hui-Ling Lou

    IPC分类号： H04K1/10 ,  H04L27/28

    CPC分类号： H04L27/2656 ,  H04L27/2676

    摘要： In a method for synchronizing a receiver to a synchronous signal, in a signal having been processed based on an automatic gain control (AGC) with a varying gain, a symbol is detected. An estimated beginning of a subsequent frame is determined based on the detected symbol. A gain of the AGC is fixed for a period during which the estimated start of the subsequent frame is processed by the AGC. A transform of the signal is analyzed to determine if the estimated start of the subsequent frame corresponds to an actual start of the subsequent frame. If the estimated start of the subsequent frame does not corresponds to the actual start of the subsequent frame, the gain of the AGC is allowed to resume varying and, a further symbol in the signal is detected, the signal having been processed based on the varying gain of the AGC.

    摘要翻译： 在用于将接收机同步到同步信号的方法中，在基于具有变化增益的自动增益控制（AGC）处理的信号中，检测到符号。 基于检测到的符号确定后续帧的估计开始。 AGC的增益在AGC期间处理后续帧的估计开始的期间是固定的。 分析信号的变换以确定后续帧的估计开始是否对应于后续帧的实际开始。 如果后续帧的估计开始不对应于后续帧的实际开始，则允许AGC的增益恢复变化，并且检测到信号中的另外的符号，该信号已经根据变化 增益AGC。

    Frame synchronization method and apparatus
    66.
    发明授权
    Frame synchronization method and apparatus 有权
    帧同步方法和装置

    公开(公告)号：US07813436B1

    公开(公告)日：2010-10-12

    申请号：US11851115

    申请日：2007-09-06

    申请人： Qing Zhao ,  Jungwon Lee ,  Leilei Song ,  Songping Wu ,  Hui-Ling Lou

    发明人： Qing Zhao ,  Jungwon Lee ,  Leilei Song ,  Songping Wu ,  Hui-Ling Lou

    IPC分类号： H04K1/10 ,  H04L27/28

    CPC分类号： H04L27/2656 ,  H04L27/2676

    摘要： In a method for synchronizing a receiver to a synchronous signal, a plurality of potential symbols are detected in a signal, the signal having been processed based on automatic gain control (AGC) with a varying gain. Next frame potential symbols corresponding to potential symbols in the plurality of potential symbols are determined, the next frame potential symbols being in frames subsequent to the frames in which the corresponding potential symbols are located. A gain of the AGC is fixed for each corresponding symbol interval during which a next frame potential symbol is operated on by the AGC. In between next frame potential symbols, the AGC is allowed to vary. Next frame potential symbols are analyzed after a transform is calculated to determine if any correspond to a start of a frame.

    摘要翻译： 在将接收机同步到同步信号的方法中，在信号中检测多个电位符号，该信号已经基于具有变化增益的自动增益控制（AGC）来处理。 确定与多个电位符号中的电位符号相对应的下一帧电位符号，下一个电位符号位于相应电位符号位于的帧之后的帧中。 对于每个对应的符号间隔，AGC的增益是固定的，在该间隔期间，由AGC操作下一个帧电位符号。 在下一帧电势符号之间，允许AGC变化。 在计算变换之后分析下一​​帧电位符号，以确定是否有对应于帧的开始。

    Carrier frequency offset estimation for OFDM systems
    70.
    发明授权
    Carrier frequency offset estimation for OFDM systems 有权
    OFDM系统的载波频率偏移估计

    公开(公告)号：US07570722B1

    公开(公告)日：2009-08-04

    申请号：US10986082

    申请日：2004-11-10

    申请人： Jungwon Lee ,  Dimitrios-Alexandros Toumpakaris ,  Hui-Ling Lou

    发明人： Jungwon Lee ,  Dimitrios-Alexandros Toumpakaris ,  Hui-Ling Lou

    IPC分类号： H04L27/06 ,  H03K9/00

    CPC分类号： H04L27/2657 ,  H04B7/01

    摘要： A system comprises a receiver module that receives a signal that is modulated using coherent orthogonal frequency division multiplexing (OFDM) modulation. A signal to noise ratio (SNR) module communicates with the receiver module and generates a SNR estimate based on the OFDM signal. An estimator module communicates with the SNR module and estimates carder frequency offset (CFO) based on the SNR estimate. System for orthogonal frequency division multiplexing (OFDM) signals such as frequency differential demodulation and time differential demodulation are also described.

    摘要翻译： 一种系统包括接收模块，该模块接收使用相干正交频分复用（OFDM）调制调制的信号。 信噪比（SNR）模块与接收机模块通信，并且基于OFDM信号产生SNR估计。 估计器模块与SNR模块通信，并且基于SNR估计来估计载波频率偏移（CFO）。 还描述了用于正交频分复用（OFDM）信号的系统，例如频率差分解调和时间差分解调。