公开(公告)号：US07764649B2

公开(公告)日：2010-07-27

申请号：US11273203

申请日：2005-11-14

申请人： Jeong-Heon Kim ,  Young-Ky Kim ,  Jae-Ho Jeon ,  Seung-Joo Maeng ,  Ji-Ho Jang

发明人： Jeong-Heon Kim ,  Young-Ky Kim ,  Jae-Ho Jeon ,  Seung-Joo Maeng ,  Ji-Ho Jang

IPC分类号： H04W4/00

CPC分类号： H04W72/048 ,  H04W16/10 ,  H04W36/20 ,  H04W72/0453

摘要： Disclosed is a hard handover method and system for use in a Broadband Wireless Access (BWA) communication system. The method and system includes dividing a data transmission field for mobile stations (MSs) into a handover field and a normal user field, allocating at least one subchannel in the normal user field to non-handover MSs located in a non-handover region, allocating at least one subchannel in the handover field to handover MSs located in a handover region, and performing communication through the allocated at least one subchannel.

摘要翻译： 公开了一种在宽带无线接入（BWA）通信系统中使用的硬切换方法和系统。 所述方法和系统包括将移动台（MS）的数据传输区划分为切换区和普通用户区，在正常用户区中分配至少一个子信道到位于非切换区域的非切换MS，分配 切换字段中的至少一个子信道切换位于切换区域中的MS，以及通过所分配的至少一个子信道执行通信。

公开(公告)号：US20070265026A1

公开(公告)日：2007-11-15

申请号：US11803119

申请日：2007-05-11

申请人： Hwa-Sun You ,  Ji-Ho Jang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

发明人： Hwa-Sun You ,  Ji-Ho Jang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

IPC分类号： H04B7/00 ,  H04B1/00

CPC分类号： H04W52/10 ,  H04W52/08 ,  H04W52/146 ,  H04W52/228

摘要： An uplink (UL) power control apparatus and method in a broadband wireless communication system are provided. The Mobile Station (MS) includes a power controller for calculating a power compensation value using a last transmit power in a previous closed loop power control when a power control mode is changed to an open loop power control, and determining a transmit power according to the open loop power control using the power compensation value; and a transmitter for adjusting and transmitting the transmit power of a UL signal under control of the power controller.

摘要翻译： 提供了宽带无线通信系统中的上行（UL）功率控制装置和方法。 移动站（MS）包括功率控制器，用于当功率控制模式改变为开环功率控制时，使用先前闭环功率控制中的最后发射功率来计算功率补偿值，并且根据 开环功率控制采用功率补偿值; 以及发射机，用于在功率控制器的控制下调整和发送UL信号的发射功率。

公开(公告)号：US20060009212A1

公开(公告)日：2006-01-12

申请号：US11167664

申请日：2005-06-27

申请人： Jeong-Heon Kim ,  Jae-Ho Jeon ,  Seung-Joo Maeng ,  Ji-Ho Jang ,  Myung-Kwang Byun

发明人： Jeong-Heon Kim ,  Jae-Ho Jeon ,  Seung-Joo Maeng ,  Ji-Ho Jang ,  Myung-Kwang Byun

IPC分类号： H04Q7/20

CPC分类号： H04B17/336

摘要： An apparatus and method for processing received signals in a handover of a MS in a BWA communication system including a plurality of BSs capable of providing a service to the MS. According to the method, the MS receives signals of different BSs and detects preambles for each BS from the received signals. Further, the MS measures channel quality information corresponding to each of the detected preambles and compares the measured channel quality information with a preset threshold value. Further, the MS processes the signals received from the different BSs based on a result obtained by comparing the measured channel quality information with the preset threshold value.

摘要翻译： 一种用于在包括能够向MS提供服务的多个BS的BWA通信系统中的MS的切换中处理接收信号的装置和方法。 根据该方法，MS接收不同BS的信号，并根据接收到的信号检测每个BS的前同步码。 此外，MS测量与每个检测到的前导码相对应的信道质量信息，并将测量的信道质量信息与预设阈值进行比较。 此外，MS基于通过将测量的信道质量信息与预设阈值进行比较而获得的结果来处理从不同BS接收的信号。

公开(公告)号：US20050254595A1

公开(公告)日：2005-11-17

申请号：US11126253

申请日：2005-05-11

申请人： Yoo-Seung Song ,  Jae-Hyok Lee ,  Seung-Hwan Lee ,  Ki-Hwan Hwang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

发明人： Yoo-Seung Song ,  Jae-Hyok Lee ,  Seung-Hwan Lee ,  Ki-Hwan Hwang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

IPC分类号： H04B7/06 ,  H03B21/00 ,  H03F1/32 ,  H04B7/26

CPC分类号： H03F1/3247 ,  H04B7/2681 ,  H04B2201/709709 ,  H04W56/00

摘要： A method and apparatus for estimating a signal delay between a transmission signal which is to be processed in a predetermined communication device of a mobile communication system, and a feedback signal. Each of the transmission and feedback signals is sampled for a predetermined length, and signal power magnitude values are computed in a sample unit and are stored in first and second memory blocks. Mean squared error (MSE) values are computed from a plurality of samples, while a start sample position of one block is shifted on a basis of a start sample position of the other block. A sample delay value is estimated from a start sample position of the one block with a smallest MSE value such that a sample delay between a transmission signal and a feedback signal is closely estimated regardless of a frequency allocation (FA) value.

摘要翻译： 一种用于估计在移动通信系统的预定通信设备中要处理的传输信号与反馈信号之间的信号延迟的方法和装置。 每个发送和反馈信号被采样预定的长度，并且信号功率幅度值以采样单元计算并存储在第一和第二存储器块中。 从多个样本计算均方误差（MSE）值，同时基于另一个块的起始样本位置移位一个块的起始采样位置。 从具有最小MSE值的一个块的开始采样位置估计采样延迟值，使得无论频率分配（FA）值如何，传输信号和反馈信号之间的采样延迟被严格估计。

公开(公告)号：US20050253745A1

公开(公告)日：2005-11-17

申请号：US11126336

申请日：2005-05-11

申请人： Yoo-Seung Song ,  Jae-Hyok Lee ,  Seung-Hwan Lee ,  Ki-Hwan Hwang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

发明人： Yoo-Seung Song ,  Jae-Hyok Lee ,  Seung-Hwan Lee ,  Ki-Hwan Hwang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

IPC分类号： H04B1/62 ,  H03F1/32 ,  H03M1/06

CPC分类号： H03F1/3258 ,  H03F1/3247 ,  H03F2200/36 ,  H03F2201/3233

摘要： A method and apparatus compensate for a non-linear characteristic of a wideband power amplifier in a transmitter for a communication system, which has the wideband power amplifier for amplifying a digital input signal. The method involves the steps of (a) generating an address based on the digital input signal, reading a distortion control value corresponding to the address from a look-up table, and applying the read distortion control value to the digital input signal to predistort the digital input signal; (b) frequency up-converting the predistorted signal and amplifying the frequency up-converted signal; (c) frequency down-converting the amplified signal and compensating for a delay of the frequency down-converted signal; and (d) updating a predetermined distortion control value in the look-up table to compensate for an error value generated in the power amplifier and an analog path occurring in steps (b) and (c) based on the compensated signal.

摘要翻译： 一种用于通信系统的发射机中的宽带功率放大器的非线性特性的方法和装置，其具有用于放大数字输入信号的宽带功率放大器。 该方法包括以下步骤：（a）基于数字输入信号产生地址，从查找表中读取对应于地址的失真控制值，并将读出的失真控制值应用于数字输入信号，以预失真 数字输入信号; （b）对预失真信号进行上变频并放大上变频信号; （c）对放大的信号进行下变频并补偿降频变换信号的延迟; 以及（d）更新所述查找表中的预定失真控制值，以补偿在所述功率放大器中产生的误差值和在步骤（b）和（c）中出现的模拟路径。

公开(公告)号：US08929227B2

公开(公告)日：2015-01-06

申请号：US13342472

申请日：2012-01-03

申请人： Neung-Hyung Lee ,  Nam-Hoon Kim ,  Jae-Ho Jeon ,  Seung-Joo Maeng ,  Seung-Hyun Min ,  Sung-Soo Hwang

发明人： Neung-Hyung Lee ,  Nam-Hoon Kim ,  Jae-Ho Jeon ,  Seung-Joo Maeng ,  Seung-Hyun Min ,  Sung-Soo Hwang

IPC分类号： H04W52/16 ,  H04W52/14 ,  H04W52/24

CPC分类号： H04W52/146 ,  H04W52/241

摘要： A method for controlling uplink transmission power in a wireless communication system is provided. The method includes estimating a downlink path loss, determining a target Signal to Noise Ratio (SNR) depending on the downlink path loss, determining an amount of power to compensate for a difference between the target SNR and an estimated SNR, and transmitting a power control message including a Transmit Power Control (TPC) command value to a terminal based on the determined amount of power.

摘要翻译： 提供了一种用于控制无线通信系统中的上行链路发送功率的方法。 该方法包括估计下行链路路径损耗，根据下行链路路径损耗确定目标信噪比（SNR），确定补偿目标SNR与估计SNR之间的差异的功率量，以及发送功率控制 消息，其包括基于所确定的功率量向终端发送功率控制（TPC）命令值。

公开(公告)号：US08451772B2

公开(公告)日：2013-05-28

申请号：US12658650

申请日：2010-02-12

申请人： Young-Ky Kim ,  Jae-Ho Jeon ,  Il-Whan Kim ,  Seung-Joo Maeng

发明人： Young-Ky Kim ,  Jae-Ho Jeon ,  Il-Whan Kim ,  Seung-Joo Maeng

IPC分类号： H04B7/212

CPC分类号： H04W16/14 ,  H04W72/0453

摘要： A base station includes a center frequency setting unit, a local oscillator, a baseband processor, and an RF processor. In the event of a frequency band change, the center frequency setting unit sets a center frequency of a use frequency channel to have a predetermined offset value with respect to a center frequency before the frequency band change. The local oscillator generates an LO frequency signal according to the center frequency set by the center frequency setting unit. The baseband processor generates a downlink baseband signal. The RF processor uses the LO frequency signal to convert the downlink baseband signal into an RF signal prior to transmission.

摘要翻译： 基站包括中心频率设置单元，本地振荡器，基带处理器和RF处理器。 在频带变化的情况下，中心频率设定单元将频率信道的中心频率设定为相对于频带变化前的中心频率具有规定的偏移值。 本地振荡器根据由中心频率设定单元设定的中心频率产生LO频率信号。 基带处理器生成下行链路基带信号。 RF处理器使用LO频率信号在传输之前将下行链路基带信号转换成RF信号。

公开(公告)号：US07881410B2

公开(公告)日：2011-02-01

申请号：US11477040

申请日：2006-06-28

申请人： Jae-Hyok Lee ,  Evgeny Gontcharov ,  Jae-Ho Jeon ,  Seung-Joo Maeng

发明人： Jae-Hyok Lee ,  Evgeny Gontcharov ,  Jae-Ho Jeon ,  Seung-Joo Maeng

IPC分类号： H04L27/06

CPC分类号： H04L5/023 ,  H04L27/2608

摘要： Disclosed is a method for detecting a user in a communication system. The method includes selecting i ranging sub-carrier signals among k sub-carrier signals upon which a k-point fast Fourier transform (FFT), has been performed multiplying the i ranging sub-carrier signals by a ranging code, performing k-point inverse fast Fourier transform (IFFT) on the i ranging sub-carrier signals multiplied by the ranging code, and (k-i) 0s, detecting a power of each of the IFFT-processed k point signals, estimating a power of a desired received signal and a power of an interference signal by using powers of the k point signals according to a predetermined scheme, and detecting a user depending on the power of the desired received signal and the power of the interference signal.

摘要翻译： 公开了一种用于在通信系统中检测用户的方法。 该方法包括：在已经执行了k点快速傅立叶变换（FFT）的k个子载波信号中选择i个测距子载波信号，其中i个测距子载波信号乘以测距码，执行k点反相 在i测距子载波信号乘以测距码和（ki）0s的快速傅里叶变换（IFFT）中，检测每个IFFT处理的k点信号的功率，估计所需接收信号的功率和 通过使用根据预定方案的k点信号的功率的干扰信号的功率，以及根据期望的接收信号的功率和干扰信号的功率来检测用户。

公开(公告)号：US07483497B2

公开(公告)日：2009-01-27

申请号：US11212928

申请日：2005-08-29

申请人： Jeong-Tae Oh ,  Jae-Hyok Lee ,  Ji-Ho Jang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

发明人： Jeong-Tae Oh ,  Jae-Hyok Lee ,  Ji-Ho Jang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

IPC分类号： H04L27/22

CPC分类号： H04L27/38 ,  H04L1/005 ,  H04L25/067

摘要： A method and apparatus are provided for calculating a log-likelihood ratio (LLR) for decoding in a receiver for a mobile communication system, wherein the method and apparatus determine selection bits for distinguishing four quadrants in a constellation representing signal points of transmission symbols, determine domain bits for distinguishing the signal points in each domain of the four quadrants according to a modulation order of the transmission symbols, repeat an operation of dividing a received signal into a real component and an imaginary component according to the number of determined domain bits, calculate and origin-shift absolute values of the real component and the imaginary component, and calculate LLRs for the selection bits. Further, the method and apparatus can subsequently calculate LLRs for corresponding domain bits each time the origin-shifted received signal is received.

摘要翻译： 提供一种用于计算用于移动通信系统的接收机中的解码的对数似然比（LLR）的方法和装置，其中所述方法和装置确定用于区分表示传输符号的信号点的星座中的四个象限的选择位，确定 用于根据传输符号的调制顺序区分四个象限的每个域中的信号点的域比特，根据确定的域比特的数量重复将接收信号划分为实数分量和虚分量的操作，计算 和原始分量和虚分量的原点偏移绝对值，并计算选择位的LLR。 此外，该方法和装置可以随后在每次接收到原点移位的接收信号时计算相应的域比特的LLR。

公开(公告)号：US20080182543A1

公开(公告)日：2008-07-31

申请号：US12020162

申请日：2008-01-25

申请人： Ha-Young YANG ,  Ji-Ho Jang ,  Jae-Ho Jeon ,  Sung-Kwon Jo ,  Seung-Joo Maeng ,  Byung-Joon Park

发明人： Ha-Young YANG ,  Ji-Ho Jang ,  Jae-Ho Jeon ,  Sung-Kwon Jo ,  Seung-Joo Maeng ,  Byung-Joon Park

IPC分类号： H04B1/10

CPC分类号： H04B1/1027

摘要： Disclosed is a method for receiving a signal by a receiver in a communication system, the method includes receiving a signal; estimating a first noise value by using a reference signal included in the received signal; estimating a second noise value by using at least one subcarrier which has been unused for a transmission of data and the reference signal; and when a difference between the estimated first noise value and the estimated second noise value is greater than a threshold value, demodulating the data by using an interference removal algorithm.

摘要翻译： 公开了一种在通信系统中由接收机接收信号的方法，该方法包括：接收信号; 通过使用包括在接收信号中的参考信号来估计第一噪声值; 通过使用未被用于数据传输和参考信号的至少一个子载波来估计第二噪声值; 并且当估计的第一噪声值和估计的第二噪声值之间的差大于阈值时，通过使用干扰去除算法对数据进行解调。