公开(公告)号：US07397784B2

公开(公告)日：2008-07-08

申请号：US10681104

申请日：2003-10-09

申请人： Dong-Ryeol Ryu ,  Seong-Kyu Hwang ,  Jae-Hawk Lee ,  Jeoung-Gil Lee ,  Chae-Man Lim

发明人： Dong-Ryeol Ryu ,  Seong-Kyu Hwang ,  Jae-Hawk Lee ,  Jeoung-Gil Lee ,  Chae-Man Lim

IPC分类号： H04J3/00

CPC分类号： H04B1/7085 ,  H04B1/7113 ,  H04B1/7117

摘要： An apparatus and method of receiving multi-path signals in a direct sequence Code Division Multiple Access (CDMA) mobile communication system is disclosed. Timing control signals from respective fingers are collected, and relations among positions of time delays where the respective fingers intend to perform a demodulation are analyzed. If it is determined that the time delay position for a specified finger approaches the time delay position of the finger allocated with an adjacent multi-path as close as a threshold value, the distance between the time delay positions is compulsorily kept as the threshold value. This can be effected by making the timing control signal of the finger allocated with the adjacent multi-path be equally used in the specified finger.

摘要翻译： 公开了一种在直接序列码分多址（CDMA）移动通信系统中接收多径信号的装置和方法。 收集来自各个手指的定时控制信号，分析各个手指进行解调的时间延迟的位置之间的关系。 如果确定指定手指的时间延迟位置接近分配有相邻多路径的手指的时间延迟位置接近阈值，则强制将时间延迟位置之间的距离保持为阈值。 这可以通过在指定的手指中均等地使用分配有相邻多路径的手指的定时控制信号来实现。

公开(公告)号：US20050174980A1

公开(公告)日：2005-08-11

申请号：US11029012

申请日：2005-01-05

申请人： Jae-Hawk Lee ,  Hyun-Kuk Choi ,  Seong-Kyu Hwang ,  Jeoung-Gil Lee

发明人： Jae-Hawk Lee ,  Hyun-Kuk Choi ,  Seong-Kyu Hwang ,  Jeoung-Gil Lee

IPC分类号： H03M13/45 ,  H03M13/27 ,  H03M13/41 ,  H04B1/707 ,  H04J13/00 ,  H04L1/00 ,  H04L25/06 ,  H04L27/38 ,  H04B7/216

CPC分类号： H04L25/067 ,  H04B1/707 ,  H04B2201/7071 ,  H04L1/0045

摘要： An apparatus and method for adjusting a desired expression section according to input bit values in a mobile communication system that expresses only a defined partial section of the input bit values in order to make the number of output bits be less than the number of the input bits, and maps bit values included in unexpressed sections to a specific value is provided. In the apparatus and method, a measurer divides possible output bit values into at least three sections, and measures output frequencies of output bits for the respective sections for a predetermined time. A controller adjusts the desired expression section, when an output frequency for a specific section is greater than output frequencies for other sections.

摘要翻译： 一种根据移动通信系统中仅输入定义的部分部分输入比特值的输入比特值来调整期望表达部分的装置和方法，以使输出比特数小于输入比特数 ，并将未表示的部分中包含的位值映射到特定值。 在装置和方法中，测量器将可能的输出比特值分成至少三个部分，并且在预定时间内测量各个部分的输出比特的输出频率。 当特定部分的输出频率大于其他部分的输出频率时，控制器调整所需的表达式部分。

公开(公告)号：US07733837B2

公开(公告)日：2010-06-08

申请号：US11029012

申请日：2005-01-05

申请人： Jae-Hawk Lee ,  Hyun-Kuk Choi ,  Seong-Kyu Hwang ,  Jeoung-Gil Lee

发明人： Jae-Hawk Lee ,  Hyun-Kuk Choi ,  Seong-Kyu Hwang ,  Jeoung-Gil Lee

IPC分类号： H04B7/216

CPC分类号： H04L25/067 ,  H04B1/707 ,  H04B2201/7071 ,  H04L1/0045

摘要： An apparatus and method for adjusting a desired expression section according to input bit values in a mobile communication system that expresses only a defined partial section of the input bit values in order to make the number of output bits be less than the number of the input bits, and maps bit values included in unexpressed sections to a specific value is provided. In the apparatus and method, a measurer divides possible output bit values into at least three sections, and measures output frequencies of output bits for the respective sections for a predetermined time. A controller adjusts the desired expression section, when an output frequency for a specific section is greater than output frequencies for other sections.

摘要翻译： 一种根据移动通信系统中仅输入定义的部分部分输入比特值的输入比特值来调整期望表达部分的装置和方法，以使输出比特数小于输入比特数 ，并将未表示的部分中包含的位值映射到特定值。 在装置和方法中，测量器将可能的输出比特值分成至少三个部分，并且在预定时间内测量各个部分的输出比特的输出频率。 当特定部分的输出频率大于其他部分的输出频率时，控制器调整所需的表达式部分。

公开(公告)号：US06490260B1

公开(公告)日：2002-12-03

申请号：US09128236

申请日：1998-08-03

申请人： Seong-Kyu Hwang

发明人： Seong-Kyu Hwang

IPC分类号： H04B7216

CPC分类号： H04L1/08 ,  H04B7/2659 ,  H04L1/0041 ,  H04L1/007 ,  H04L1/0071 ,  H04L1/0072 ,  H04L1/0086

摘要： A method for increasing information throughput in a transmitter of a digital mobile telecommunication system is provided. The method includes the step of implementing error correction with respect to a traffic channel frame having user service information to generate CRC bits for the user service information of the traffic channel frame. The CRC bits are inserted into a control channel frame. The traffic channel frame and the control channel frame having the inserted CRC bits are transmitted at a radio frequency.

摘要翻译： 提供了一种用于增加数字移动电信系统的发射机中的信息吞吐量的方法。 该方法包括对具有用户服务信息的业务信道帧执行纠错以产生业务信道帧的用户业务信息的CRC比特的步骤。 CRC位被插入到控制信道帧中。 具有插入的CRC比特的业务信道帧和控制信道帧以射频发送。

公开(公告)号：US06836225B2

公开(公告)日：2004-12-28

申请号：US10670743

申请日：2003-09-26

申请人： Nam-Il Lee ,  Yong-Serk Kim ,  Seong-Kyu Hwang ,  Sang-Won Kang ,  Sang-Hyun Chi

发明人： Nam-Il Lee ,  Yong-Serk Kim ,  Seong-Kyu Hwang ,  Sang-Won Kang ,  Sang-Hyun Chi

IPC分类号： H03M700

CPC分类号： H03M7/3082 ,  Y10S707/99931

摘要： A fast search method for searching for an optimum codeword for nearest neighbor vector quantization. An upper boundary value and a lower boundary value between which an optimum codeword will exist in a codebook are calculated using a distortion of a designated element in an input vector and an experimentally determined threshold. Further, a start point and an end point for codebook search are determined using a binary search method from a codebook rearranged in descending order, and a full search scheme is applied only within a search range calculated by the determined start point and end point, thereby determining an optimum codeword for nearest neighbor vector quantization.

公开(公告)号：US06532249B1

公开(公告)日：2003-03-11

申请号：US09366008

申请日：1999-08-02

申请人： Seong-Kyu Hwang

发明人： Seong-Kyu Hwang

IPC分类号： H04B169

CPC分类号： H04B1/00

摘要： A transmitter for a multiple frequency radio communication system provides a capability for filtering spread spectrum signals of a multiple frequency system by using one lowpass filter, and variably controlling the sampling speed when converting the lowpass filtered digital signal into an analog signal. In one embodiment, the transmitter comprises a clock generating section for receiving a predetermined bandwidth selecting control signal and then generating a clock having a speed in proportion to the predetermined bandwidth, a multiplexing section for inserting zero into a signal, spread modulated in a desired bandwidth, the bandwidth being selected from the plurality of frequency bandwidths according to the predetermined bandwidth selecting control signal, to produce an oversampled signal, a lowpass filter for receiving the clock and for lowpass filtering an output signal of the multiplexing section, a digital/analog converter for receiving the clock and then converting an output signal of the lowpass filter into an analog signal at the clock speed, and a switch for receiving the bandwidth selecting control signal and then switching an output of the digital/analog converter to a corresponding one of a plurality of intermediate frequency circuits according to the selected bandwidth.

摘要翻译： 用于多频无线电通信系统的发射机通过使用一个低通滤波器提供对多频系统的扩频信号进行滤波的能力，并且在将低通滤波的数字信号转换成模拟信号时可变地控制采样速度。 在一个实施例中，发射机包括时钟产生部分，用于接收预定带宽选择控制信号，然后产生具有与预定带宽成比例的速度的时钟;复用部分，用于将零插入信号中，以期望的带宽进行扩频调制 ，根据预定带宽选择控制信号从多个频带中选择带宽，以产生过采样信号;用于接收时钟的低通滤波器和用于对多路复用部分的输出信号进行低通滤波的数字/模拟转换器 用于接收时钟，然后以时钟速度将低通滤波器的输出信号转换为模拟信号;以及开关，用于接收带宽选择控制信号，然后将数/模转换器的输出切换到相应的一个 根据所选带宽的多个中频电路。

公开(公告)号：US5970102A

公开(公告)日：1999-10-19

申请号：US917061

申请日：1997-08-25

申请人： Seong-Kyu Hwang

发明人： Seong-Kyu Hwang

IPC分类号： H04B7/26 ,  H03D1/00

CPC分类号： H04W56/0035 ,  H04B7/2675

摘要： A circuit for detecting a frequency correction burst in a TDMA digital mobile communication system. The circuit comprises a first multiplier for inputting I-channel data modulated by a continuous phase shift key and multiplying the inputted I-channel data by a sine wave frequency of the frequency correction burst to produce a first channel signal I1(nT); a second multiplier for inputting Q-channel data modulated by the continuous phase shift key and multiplying the inputted Q-channel data by the sine wave frequency of the frequency correction burst to produce a second channel signal Q1(nT); a low-pass filter for lowpass-filtering the first and second channel signals I1(nT) and Q1(nT) to produce first and second filtered channel signals I2(nT) and Q2(nT); a first energy estimation unit for estimating energies of the first and second channel signals I1(nT) and Q1(nT), respectively to generate a first instantaneous signal energy E.sub.p (nT); a second energy estimation unit for estimating energies of the first and second channel signals I1(nT) and Q1(nT), respectively to generate a second instantaneous signal energy E.sub.q (nT); a normalization unit for normalizing the first instantaneous signal energy E.sub.p (nT) to the second instantaneous signal energy E.sub.q (nT) to generate a normalized signal G(nT); and a burst discriminator for detecting only a frequency correction burst from the normalized signal G(nT).

摘要翻译： 一种用于检测TDMA数字移动通信系统中的频率校正突发的电路。 该电路包括用于输入由连续相移键调制的I信道数据的第一乘法器，并将输入的I信道数据乘以频率校正脉冲串的正弦波频率以产生第一信道信号I1（nT）; 第二乘法器，用于输入由连续相移键调制的Q通道数据，并将输入的Q通道数据乘以频率校正脉冲串的正弦波频率，以产生第二通道信号Q1（nT）; 用于对第一和第二信道信号I1（nT）和Q1（nT）进行低通滤波以产生第一和第二滤波信道信号I2（nT）和Q2（nT）的低通滤波器; 第一能量估计单元，用于分别估计第一和第二信道信号I1（nT）和Q1（nT）的能量，以产生第一瞬时信号能量Ep（nT）; 第二能量估计单元，用于分别估计第一和第二信道信号I1（nT）和Q1（nT）的能量，以产生第二瞬时信号能量Eq（nT）; 归一化单元，用于将第一瞬时信号能量Ep（nT）归一化为第二瞬时信号能量Eq（nT），以产生归一化信号G（nT）; 以及用于仅从归一化信号G（nT）检测频率校正脉冲串的脉冲串鉴别器。