公开(公告)号：US20100158091A1

公开(公告)日：2010-06-24

申请号：US12496917

申请日：2009-07-02

申请人： Pan-Soo Kim ,  Joon-Gyu Ryu ,  Dae-Ig Chang ,  Ho-Jin Lee ,  Myung-Hoon Sunwoo ,  Jang-Woong Park

发明人： Pan-Soo Kim ,  Joon-Gyu Ryu ,  Dae-Ig Chang ,  Ho-Jin Lee ,  Myung-Hoon Sunwoo ,  Jang-Woong Park

IPC分类号： H04B17/00 ,  H04L27/06

CPC分类号： H04L27/22 ,  H04L27/0014 ,  H04L2027/0067

摘要： Provided is a frequency error estimating method of a communication system. The method includes receiving a frame, and calculating a frequency error from a SOF field of the received frame.

摘要翻译： 提供了一种通信系统的频率误差估计方法。 该方法包括接收帧，并从接收到的帧的SOF字段计算频率误差。

公开(公告)号：US08731126B2

公开(公告)日：2014-05-20

申请号：US12942350

申请日：2010-11-09

申请人： Joon-Gyu Ryu ,  Dae-Ig Chang

发明人： Joon-Gyu Ryu ,  Dae-Ig Chang

IPC分类号： H03D3/24 ,  H03L7/06

CPC分类号： H03L7/185 ,  H03L7/099 ,  H03L2207/12

摘要： A phase locked loop includes: a loop filter; a voltage controlled oscillating unit configured to output a frequency varying according to an output voltage of the loop filter; a frequency down-converting unit configured to down-convert an output frequency of the voltage controlled oscillating unit according to a band of the output frequency of the voltage controlled oscillating unit; and a frequency divider configured to divide a frequency down-converted by the frequency down-converting unit. The output frequency of the voltage controlled oscillating unit varies according to the output voltage of the loop filter and a control signal compensating the frequency down-converted by the frequency down-converting unit.

摘要翻译： 锁相环包括：环路滤波器; 电压控制振荡单元，被配置为输出根据所述环路滤波器的输出电压而变化的频率; 降频转换单元，被配置为根据压控振荡单元的输出频率的频带对压控振荡单元的输出频率进行下变频; 以及分频器，被配置为对由下变频单元进行下变频的频率进行分频。 电压控制振荡单元的输出频率根据环路滤波器的输出电压和补偿由下变频单元下变频的频率的控制信号而变化。

公开(公告)号：US20070092041A1

公开(公告)日：2007-04-26

申请号：US11442078

申请日：2006-05-25

申请人： Il-Han Kim ,  Joon-Gyu Ryu ,  Ho-Kyom Kim ,  Deock-Gil Oh

发明人： Il-Han Kim ,  Joon-Gyu Ryu ,  Ho-Kyom Kim ,  Deock-Gil Oh

IPC分类号： H04L27/22

CPC分类号： H04L27/0012 ,  H04L27/22

摘要： Provided are an apparatus and method for robust Binary Phase Shift Keying/Quadrature Phase Shift Keying (BPSK/QPSK) blind modulation classification against errors in a satellite communication system. The apparatus includes first and second likelihood value calculators for calculating a likelihood value of a received baseband signal each for of BPSK and QPSK modulation modes, respectively, a maximum setting unit for deriving a maximum value of the likelihood values or ith likelihood ratios calculated by the first and second likelihood value calculators and setting a flag for the maximum value to “1” and a flag for the remaining value to “0”, first and second flag combining units for combining the flags for the modulation modes, respectively, a modulation mode flag setting unit for selecting a maximum value from the flags combined by the first and second flag combining units, and a modulation classification mode deciding unit.

摘要翻译： 本发明提供了一种针对卫星通信系统中的错误的鲁棒二进制相移键控/正交相移键控（BPSK / QPSK）盲调制分类的装置和方法。 该装置包括：第一和第二似然值计算器，用于分别计算用于BPSK和QPSK调制模式的接收基带信号的似然值;最大设置单元，用于导出似然值的最大值或i < / SUP>似然比，并将最大值的标志设置为“1”，将剩余值的标志设置为“0”，第一和第二标志组合单元，用于组合用于 调制模式标志设置单元，用于从由第一和第二标志组合单元组合的标志中选择最大值，以及调制分类模式决定单元。

公开(公告)号：US07697639B2

公开(公告)日：2010-04-13

申请号：US11442078

申请日：2006-05-25

申请人： Il-Han Kim ,  Joon-Gyu Ryu ,  Ho-Kyom Kim ,  Deock-Gil Oh

发明人： Il-Han Kim ,  Joon-Gyu Ryu ,  Ho-Kyom Kim ,  Deock-Gil Oh

IPC分类号： H03D3/22

CPC分类号： H04L27/0012 ,  H04L27/22

摘要： Provided are an apparatus and method for robust Binary Phase Shift Keying/Quadrature Phase Shift Keying (BPSK/QPSK) blind modulation classification. The apparatus includes first and second likelihood value calculators for calculating a likelihood value of a received baseband signal each for of BPSK and QPSK modulation modes. A maximum setting unit derives a maximum value of the likelihood values or ith likelihood ratios calculated by the first and second likelihood value calculators. A flag is set for the maximum value to “1” and a flag for the remaining value is set to “0”. First and second flag combining units combine the flags for the modulation modes. A modulation mode flag setting unit selects a maximum value from the flags combined by the first and second flag combining units.

摘要翻译： 提供了用于鲁棒二进制相移键控/正交相移键控（BPSK / QPSK）盲调制分类的装置和方法。 该装置包括用于计算每个用于BPSK和QPSK调制模式的接收基带信号的似然值的第一和第二似然值计算器。 最大设置单元导出由第一和第二似然值计算器计算的似然值或第i似然比的最大值。 设置最大值为“1”的标志，剩余值的标志设置为“0”。 第一和第二标志组合单元组合用于调制模式的标志。 调制模式标志设置单元从由第一和第二标志组合单元组合的标志中选择最大值。

公开(公告)号：US07801101B2

公开(公告)日：2010-09-21

申请号：US10892679

申请日：2004-07-15

申请人： Minsu Shin ,  Joon-Gyu Ryu ,  Hoon Jeong ,  Ho-Jin Lee

发明人： Minsu Shin ,  Joon-Gyu Ryu ,  Hoon Jeong ,  Ho-Jin Lee

IPC分类号： H04B7/216

CPC分类号： H04B7/18513 ,  H04L1/0003 ,  H04L1/0009 ,  H04W4/18 ,  H04W84/06

摘要： Provided are a forward link rain attenuation compensating apparatus using an adaptive transmission scheme in an interactive satellite communication system and a method thereof. The apparatus separates the mobile stations into clear-sky mobile stations and mobile stations in the state of rain attenuation and makes the clear-sky mobile stations receive data having a high data transmission efficiency at a high-speed while making the rain attenuation mobile stations receive the data continuously although the data transmit rate is low by making each of the two kinds of mobile stations receive data frames of a different transmission method, and provides a method therefor. The apparatus includes: a resource manager, a transmitting data format converter, a forward modulator, a backward demodulator, a receiving data format converter.

摘要翻译： 提供一种在交互式卫星通信系统中使用自适应传输方案的前向链路雨衰补偿装置及其方法。 该装置将移动台分为处于雨衰状态的空中移动台和移动台，使得天空清空的移动台高速接收高数据传输效率的数据，同时使雨衰移移动站接收 通过使两种移动站中的每一个接收到不同的传输方式的数据帧，数据传输速率是低的，并且提供了一种方法。 该装置包括：资源管理器，发送数据格式转换器，前向调制器，反向解调器，接收数据格式转换器。