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1. 发明授权

US07636571B2 Method and apparatus for allocating channels in an orthogonal frequency division multiple access system 有权
标题翻译：用于在正交频分多址系统中分配信道的方法和装置
公开(公告)号：US07636571B2
公开(公告)日：2009-12-22
申请号：US11072181
申请日：2005-03-04
申请人： Jae-Hyok Lee , Jae-Ho Jeon , Soon-Young Yoon , Seung-Joo Maeng , Jeong-Tae Oh , Ji-Ho Jang
发明人： Jae-Hyok Lee , Jae-Ho Jeon , Soon-Young Yoon , Seung-Joo Maeng , Jeong-Tae Oh , Ji-Ho Jang
IPC分类号： H04W36/00 , H04W72/00 , H04W40/00
CPC分类号： H04W36/0072 , H04L5/0062 , H04L5/0073 , H04L5/0094 , H04W24/00 , H04W28/26 , H04W36/18 , H04W72/0413 , H04W72/042 , H04W72/0453
摘要： A method for allocating a frequency to a subscriber station (SS) in handover operation in an Orthogonal Frequency Division Multiple Access (OFDMA) system. In the method, the SS checks safety channel frequencies for a target base station (BS), generates a safety channel frequency request message for requesting allocation of the checked safety channel frequencies, and transmits the safety channel frequency request message. Upon receiving the safety channel frequency request message from the SS, a serving BS allocates frequencies for a requested channel, and transmits an allocation message with the frequency allocation information to the SS. The serving BS transmits a channel allocation request message to the target BS according to the frequency allocation information. Upon receiving the channel allocation request message, the target BS allocates the safety channel frequencies to the SS.
摘要翻译：一种在正交频分多址（OFDMA）系统中在切换操作中向用户站（SS）分配频率的方法。在该方法中，SS检查目标基站（BS）的安全信道频率，生成用于请求分配所检查的安全信道频率的安全信道频率请求消息，并发送安全信道频率请求消息。在从SS接收到安全信道频率请求消息时，服务BS为所请求的信道分配频率，并向SS发送具有频率分配信息的分配消息。服务BS根据频率分配信息向目标BS发送信道分配请求消息。在接收到信道分配请求消息后，目标BS向SS分配安全信道频率。

2. 发明申请

US20050197132A1 Method and apparatus for allocating channels in an orthogonal frequency division multiple access system 有权
标题翻译：用于在正交频分多址系统中分配信道的方法和装置
公开(公告)号：US20050197132A1
公开(公告)日：2005-09-08
申请号：US11072181
申请日：2005-03-04
申请人： Jae-Hyok Lee , Jae-Ho Jeon , Soon-Young Yoon , Seung-Joo Maeng , Jeong-Tae Oh , Ji-Ho Jang
发明人： Jae-Hyok Lee , Jae-Ho Jeon , Soon-Young Yoon , Seung-Joo Maeng , Jeong-Tae Oh , Ji-Ho Jang
IPC分类号： H04B7/26 , H04Q7/20
CPC分类号： H04W36/0072 , H04L5/0062 , H04L5/0073 , H04L5/0094 , H04W24/00 , H04W28/26 , H04W36/18 , H04W72/0413 , H04W72/042 , H04W72/0453
摘要： A method for allocating a frequency to a subscriber station (SS) in handover operation in an Orthogonal Frequency Division Multiple Access (OFDMA) system. In the method, the SS checks safety channel frequencies for a target base station (BS), generates a safety channel frequency request message for requesting allocation of the checked safety channel frequencies, and transmits the safety channel frequency request message. Upon receiving the safety channel frequency request message from the SS, a serving BS allocates frequencies for a requested channel, and transmits an allocation message with the frequency allocation information to the SS. The serving BS transmits a channel allocation request message to the target BS according to the frequency allocation information. Upon receiving the channel allocation request message, the target BS allocates the safety channel frequencies to the SS.
摘要翻译：一种在正交频分多址（OFDMA）系统中在切换操作中向用户站（SS）分配频率的方法。在该方法中，SS检查目标基站（BS）的安全信道频率，生成用于请求分配所检查的安全信道频率的安全信道频率请求消息，并发送安全信道频率请求消息。在从SS接收到安全信道频率请求消息时，服务BS为所请求的信道分配频率，并向SS发送具有频率分配信息的分配消息。服务BS根据频率分配信息向目标BS发送信道分配请求消息。在接收到信道分配请求消息后，目标BS向SS分配安全信道频率。

3. 发明授权

US07483497B2 Method and apparatus for calculating log-likelihood ratio for decoding in a receiver for a mobile communication system 有权
标题翻译：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的方法和装置
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。

4. 发明申请

US20060045211A1 Method and apparatus for calculating log-likelihood ratio for decoding in a receiver for a mobile communication system 有权
公开(公告)号：US20060045211A1
公开(公告)日：2006-03-02
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.

5. 发明申请

US20050281316A1 Method for transmitting/receiving operation mode information in a broadband wireless access communication system 审中-公开
标题翻译：用于在宽带无线接入通信系统中发送/接收操作模式信息的方法
公开(公告)号：US20050281316A1
公开(公告)日：2005-12-22
申请号：US11157525
申请日：2005-06-21
申请人： Ji-Ho Jang , Jae-Ho Jeon , Seung-Joo Maeng , Ik-Beom Lee , Jae-Hyok Lee , Soon-Young Yoon , Pan-Yuh Joo
发明人： Ji-Ho Jang , Jae-Ho Jeon , Seung-Joo Maeng , Ik-Beom Lee , Jae-Hyok Lee , Soon-Young Yoon , Pan-Yuh Joo
IPC分类号： H04J11/00 , H04L5/02 , H04L27/26 , H04B1/69
CPC分类号： H04L5/023 , H04L27/2608
摘要： A method for transmitting/receiving operation mode information in a broadband wireless access (BWA) communication system is disclosed. A transmission side maps a predetermined preamble pattern to an operation mode, and upon a change in operation mode, transmits a preamble pattern corresponding to the changed operation mode. A reception side receives the preamble pattern, detects an operation mode and a preamble code mapped to the preamble pattern, and acquires information from a frame section received according to the operation mode.
摘要翻译：公开了一种用于在宽带无线接入（BWA）通信系统中发送/接收操作模式信息的方法。发送侧将预定的前导码模式映射到操作模式，并且在操作模式的改变时，发送与改变的操作模式相对应的前导码模式。接收侧接收前导码模式，检测映射到前导码模式的操作模式和前导码，并从根据操作模式接收的帧部分获取信息。

6. 发明申请

US20050253652A1 Digital predistortion apparatus and method in power amplifier 有权
标题翻译：功率放大器中的数字预失真装置和方法
公开(公告)号：US20050253652A1
公开(公告)日：2005-11-17
申请号：US11126322
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： H04B7/26 , H03F1/26 , H03F1/32
CPC分类号： H03F1/3247
摘要： A digital predistortion apparatus is provided for predistorting a nonlinear characteristic caused by a wideband power amplifier that amplifies a input signal. The digital predistortion apparatus includes a predistorter, connected to the power amplifier via a digital-to-analog converter (DAC) and a frequency up-converter, for receiving the input signal and compensating for the nonlinear characteristic using a look-up table that depends upon a change in output power of the power amplifier. The digital predistortion apparatus further includes look-up table (LUT) updating block for adaptively updating the look-up table by comparing a feedback signal output from the power amplifier, connected thereto via an analog-to-digital converter (ADC), with the input signal output from the predistorter.
摘要翻译：提供一种用于预失真由放大输入信号的宽带功率放大器引起的非线性特性的数字预失真装置。数字预失真装置包括一个预失真器，它通过一个数/模转换器（DAC）和一个上变频器连接到功率放大器，用于接收输入信号，并使用一个查找表来补偿非线性特性在功率放大器的输出功率变化时。数字预失真装置还包括查找表（LUT）更新块，用于通过将经由模数转换器（ADC）连接到其的功率放大器输出的反馈信号与自动更新查找表与来自预失真器的输入信号输出。

7. 发明申请

US20070002959A1 Apparatus and method for detecting user in a communication system 有权
标题翻译：用于在通信系统中检测用户的装置和方法
公开(公告)号：US20070002959A1
公开(公告)日：2007-01-04
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： H04K1/10
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。

8. 发明申请

US20050195791A1 Apparatus and method for assigning a ranging channel and transmitting and receiving a ranging signal in an OFDM system 审中-公开
标题翻译：用于分配测距信道并在OFDM系统中发送和接收测距信号的装置和方法
公开(公告)号：US20050195791A1
公开(公告)日：2005-09-08
申请号：US11074153
申请日：2005-03-07
申请人： Sang-Hoon Sung , Jae-Ho Jeon , Soon-Young Yoon , Seung-Joo Maeng , Jae-Hee Cho , Hoon Huh , In-Seok Hwang , Jae-Hyok Lee
发明人： Sang-Hoon Sung , Jae-Ho Jeon , Soon-Young Yoon , Seung-Joo Maeng , Jae-Hee Cho , Hoon Huh , In-Seok Hwang , Jae-Hyok Lee
IPC分类号： H04J11/00 , H04J3/06 , H04L5/02 , H04L27/26 , H04W28/06 , H04W64/00 , H04W72/04 , H04W72/08 , H04W84/12 , H04B7/216
CPC分类号： H04J3/0682 , G01S13/825 , H04L5/0007 , H04L5/0016 , H04L5/0039 , H04L5/0048 , H04L5/0094 , H04L5/023 , H04L27/2613 , H04L27/2655 , H04W28/06 , H04W64/00 , H04W72/04 , H04W72/0453 , H04W72/082 , H04W84/12
摘要： The present invention relates to a mobile communication system utilizing an OFDM scheme. In a broadband wireless access communication system utilizing an OFDM/OFDMA scheme, in which uplink time sync between a BS and a SS and the intensity of a BS reception signal are set, and a ranging signal is transmitted from the SS to the BS in order that the SS gives a bandwidth request to the BS. Described herein are a method for constructing a ranging channel, a method for a BS's operating a ranging channel to be used by a SS, a method for receiving ranging codes transmitted SS by SS from the BS to the SS through the ranging channel.
摘要翻译：本发明涉及利用OFDM方案的移动通信系统。在利用OFDM / OFDMA方案的宽带无线接入通信系统中，其中BS和SS之间的上行链路时间同步和BS接收信号的强度被设置，并且测距信号按顺序从SS发送到BS SS向BS提供带宽请求。这里描述了一种用于构建测距信道的方法，用于BS操作要由SS使用的测距信道的方法，用于通过测距信道从BS向SS发送SS的SS的测量码的方法。

9. 发明申请

US20050254595A1 Method and apparatus for estimating a sample delay between a transmission signal and a feedback signal in a mobile communication system, and a base station transmitter using the same 失效
标题翻译：用于估计移动通信系统中的发送信号和反馈信号之间的采样延迟的方法和装置以及使用其的基站发射机
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。

10. 发明申请

US20050253745A1 Digital predistortion apparatus and method for a wideband power amplifier 审中-公开
标题翻译：用于宽带功率放大器的数字预失真装置和方法
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。

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