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    • 51. 发明授权
    • Apparatus and method for generating codes in a communication system
    • 用于在通信系统中生成代码的装置和方法
    • US07093184B2
    • 2006-08-15
    • US10140854
    • 2002-05-08
    • Min-Goo KimSang-Hyuck HaHo-Kyu Choi
    • Min-Goo KimSang-Hyuck HaHo-Kyu Choi
    • H03M13/03
    • H04L1/0066H04L1/0068H04L1/0071H04L1/08H04L1/1816
    • Disclosed is an apparatus and method for generating a QCTC (Quasi-Complementary Turbo Code) considering a characteristic of a turbo code in a packet communication system or a communication system using an ARQ (Automatic Repeat reQuest) scheme by segmenting a length N of the QCTC into a predetermined number of sections, determining SPIDs (Sub-code Packet Identifications) corresponding to the segmented sections, and specifying one of the SPIDs allocated for initial transmission of the sub-code; calculating a number of remaining symbols represented by N-Fs, where N is a length of the QCTC and Fs is a starting symbol position of the sub-code of the QCTC; determining a last symbol position Ls of the sub-code by comparing the number of the remaining symbols with a length of the sub-code; and sequentially transmitting symbols of the sub-code from the starting symbol position Fs to the last symbol position Ls.
    • 公开了一种考虑分组通信系统中的turbo码的特性或使用ARQ(自动重传请求)方案的通信系统的QCTC(准互补Turbo码)的生成装置和方法,该方法通过分割QCTC的长度N 确定与分段部分相对应的SPID(子码分组标识),并指定分配用于子码初始发送的SPID中的一个; 计算由N-Fs表示的剩余符号数,其中N是QCTC的长度,Fs是QCTC的子代码的起始符号位置; 通过将剩余符号的数量与子代码的长度进行比较来确定子代码的最后符号位置Ls; 并将子代码的符号顺序地从起始符号位置Fs发送到最后的符号位置Ls。
    • 55. 发明申请
    • Apparatus and method for transmitting a control message on a packet data control channel in a mobile communication system supporting a packet data service
    • 在支持分组数据业务的移动通信系统中,在分组数据控制信道上发送控制消息的装置和方法
    • US20050078641A1
    • 2005-04-14
    • US10963540
    • 2004-10-14
    • Min-Goo Kim
    • Min-Goo Kim
    • H04B7/155H04J3/24H04L1/16H04L1/18H04B7/216
    • H04L1/1829H04J3/24H04L1/16
    • An apparatus and method for transmitting Walsh information over a packet data control channel in a base station of a mobile communication system that transmits packet data and has the packet data control channel for transmitting control information related to transmission of packet data. Receivers decode reverse ACK channel (R-ACKCH) signals received from corresponding mobile stations, and count the number of NAKs from the decoded information. A Walsh mask broadcasting controller receives the number of NAKs from the receivers, and outputs a Walsh mask information broadcasting enable signal if the number of NAKs is larger than a predetermined threshold. A transmitter generates and broadcasts Walsh mask information of the base station upon receiving the Walsh mask information broadcasting enable signal.
    • 一种用于在发送分组数据的移动通信系统的基站中的分组数据控制信道上发送沃尔什信息的装置和方法,并具有用于发送与分组数据的发送有关的控制信息的分组数据控制信道。 接收机解码从对应的移动站接收的反向ACK信道(R-ACKCH)信号,并根据解码的信息对NAK的数目进行计数。 沃尔什掩模广播控制器从接收器接收NAK的数量,并且如果NAK的数量大于预定阈值,则输出沃尔什掩模信息广播使能信号。 接收到沃尔什掩模信息广播使能信号时,发射机产生并广播基站的沃尔什掩模信息。
    • 56. 发明授权
    • Demodulation apparatus and method in a communication system employing 16-ary QAM
    • 在采用16进制QAM的通信系统中的解调装置和方法
    • US06661282B2
    • 2003-12-09
    • US10217963
    • 2002-08-13
    • Sang-Hyuck HaMin-Goo Kim
    • Sang-Hyuck HaMin-Goo Kim
    • H03D300
    • H04L27/38H04L25/067
    • Disclosed is a 16-ary QAM (Quadrature Amplitude Modulation) demodulation apparatus for receiving an input signal Rk(Xk, Yk) comprised of a kth quadrature-phase component Yk and a kth in-phase component Xk, and generating soft values &Lgr;(sk,0), &Lgr;(sk,1), &Lgr;(sk,2) and &Lgr;(sk,3) for the input signal Rk(Xk, Yk) by a soft decision means. A first calculator decides a soft value &Lgr;(sk,2) of a third demodulated symbol among 4 demodulated symbols by subtracting a distance 2a between two demodulated symbols on the same axis of a mapping table from a level |Yk| of the quadrature-phase component Yk. A second calculator decides a soft value &Lgr;(sk,3) of a fourth demodulated symbol by calculating Yk+&agr;*Zk using a first variable a determined by the soft value of the third demodulated symbol and a sign bit of the quadrature-phase component Yk. A third calculator decides a soft value &Lgr;(sk,0) of a first demodulated symbol by subtracting the distance 2a from a level |Xk| of the in-phase component Xk. A fourth calculator decides a soft value &Lgr;(sk,1) of a second demodulated symbol by calculating Xk+&bgr;*Z′k using a second variable &bgr; determined by the soft value of the first demodulated symbol and a sign bit of the in-phase component Xk.
    • 公开了一种16进制QAM(正交幅度调制)解调装置,用于接收包括ak个正交相分量Yk和ak +同相分量Xk的输入信号Rk(Xk,Yk),并产生软 通过软判定装置对输入信号Rk(Xk,Yk)的值λ(s1,...),λ(sk,1),λ(sk,2)和λ(sk,3)。 第一计算器通过从映射表的相同轴上减去两个解调符号之间的距离2a来确定第四解调符号中的第三解调符号的软值Lambda(sk,2) 的正交相分量Yk。 第二计算器通过使用由第三解调符号的软值确定的第一变量a和正交相位分量的符号位来计算Yk +α* Zk来确定第四解调符号的软值Lambda(sk,3) YK。 第三计算器通过从水平| Xk |减去距离2a来确定第一解调符号的软值Lambda(sk,0) 的同相分量Xk。 第四计算器通过使用由第一解调符号的软值确定的第二变量β和相关的第一解调符号的符号位来计算Xk +β* Z'k来确定第二解调符号的软值Lambda(sk,1) 相位分量Xk。
    • 60. 发明授权
    • Apparatus and method for carrier frequency synchronization in an OFDM system
    • OFDM系统中载波频率同步的装置和方法
    • US07693039B2
    • 2010-04-06
    • US11605484
    • 2006-11-29
    • Hee-Jin RohSu-Jin YoonMin-Goo Kim
    • Hee-Jin RohSu-Jin YoonMin-Goo Kim
    • H04J1/00H04L7/00
    • H04L27/2675H04L27/2659H04L27/2672H04L27/2684H04L27/2688
    • An apparatus and method for carrier frequency synchronization in an Orthogonal Frequency Division Multiplexing (OFDM) system are provided for correcting an initial carrier frequency offset in the OFDM system. A metric generator for frequency estimation performs a first accumulation process for a value computed by multiplying a Phase Reference Symbol (PRS) generated from a reception stage by a Fast Fourier Transform (FFT) output signal for an OFDM symbol in a PRS position within a frame, acquires a differential symbol from a product of adjacent FFT output symbols, performs a second accumulation process for a real part extracted from the differential symbol, and outputs a metric value for the frequency estimation. A maximal value-related index generator compares metric values for initial frequency estimation within a predetermined frequency offset estimation range, and selects and outputs a maximal metric value as a frequency offset estimate.
    • 提供了一种用于正交频分复用(OFDM)系统中的载波频率同步的装置和方法,用于校正OFDM系统中的初始载波频率偏移。 用于频率估计的度量发生器对通过将从接收级产生的相位参考符号(PRS)乘以帧内的PRS位置中的OFDM符号的快速傅立叶变换(FFT)输出信号而计算的值进行第一累积处理 从相邻FFT输出符号的乘积获取差分符号,对从差分符号提取的实部执行第二累积处理,并输出用于频率估计的度量值。 最大值相关索引发生器将预定频率偏移估计范围内的初始频率估计的度量值进行比较,并且选择并输出最大度量值作为频率偏移估计。