公开(公告)号：US08503955B2

公开(公告)日：2013-08-06

申请号：US12839733

申请日：2010-07-20

申请人： Kyu-Min Kang ,  Sang-In Cho ,  Heon-Jin Hong

发明人： Kyu-Min Kang ,  Sang-In Cho ,  Heon-Jin Hong

IPC分类号： H04B1/16

CPC分类号： H04B1/1027

摘要： An apparatus for detecting a signal in a common frequency band includes: a signal processor configured to extract a selected band signal from received wireless signals by filtering the received wireless signal based on a frequency selection control signal, convert the extracted signal to a baseband signal, and detect a predetermined signal; a sensing signal determiner configured to determine existence of the signal, output a determination result, and outputs a frequency selection generating signal when the predetermined signal is absent; and a frequency selection controller configured to output the frequency selection control signal by selecting a target band among a plurality of previously decided bands.

摘要翻译： 用于检测公共频带中的信号的装置包括：信号处理器，被配置为基于频率选择控制信号对所接收的无线信号进行滤波，从接收到的无线信号中提取所选频带信号，将提取的信号转换为基带信号， 并检测预定信号; 感测信号确定器，被配置为确定信号的存在，输出确定结果，并且当所述预定信号不存在时，输出频率选择产生信号; 以及频率选择控制器，被配置为通过在多个先前确定的频带中选择目标频带来输出频率选择控制信号。

公开(公告)号：US08000397B2

公开(公告)日：2011-08-16

申请号：US12110708

申请日：2008-04-28

申请人： Sang-In Cho ,  Kyu-Min Kang ,  Sang-Sung Choi

发明人： Sang-In Cho ,  Kyu-Min Kang ,  Sang-Sung Choi

IPC分类号： H04L27/28

CPC分类号： H04L27/2656 ,  H04B2001/71563 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675

摘要： Provided is a method and apparatus for acquiring OFDM synchronization even when it fails to detect a plurality of symbols at an initial stage. In the method, a frequency is adjusted to a first frequency band and a cross correlation value between a received preamble symbol and a preset preamble symbol is calculated. When the calculated cross correlation value is larger than a predetermined reference value and is first detected, frequency hopping is performed to receive subsequent symbols and cross correlation values to the subsequent symbols are reexamined. When the reexamined cross correlation value larger than the predetermined reference value is detected, timing synchronization, frequency offset estimation, and frame detection are performed.

摘要翻译： 提供了即使在初始阶段不能检测到多个符号的情况下也可以获取OFDM同步的方法和装置。 在该方法中，将频率调整为第一频带，并且计算所接收的前导码符号和预设前置码符号之间的互相关值。 当所计算的互相关值大于预定参考值并且被首先检测时，执行跳频以接收后续符号，并重新检查对后续符号的互相关值。 当检测到重新检查的大于预定参考值的互相关值时，执行定时同步，频率偏移估计和帧检测。

公开(公告)号：US20110151812A1

公开(公告)日：2011-06-23

申请号：US12839733

申请日：2010-07-20

申请人： Kyu-Min KANG ,  Sang-In Cho ,  Heon-Jin Hong

发明人： Kyu-Min KANG ,  Sang-In Cho ,  Heon-Jin Hong

IPC分类号： H04B1/18

CPC分类号： H04B1/1027

摘要： An apparatus for detecting a signal in a common frequency band includes: a signal processor configured to extract a selected band signal from received wireless signals by filtering the received wireless signal based on a frequency selection control signal, convert the extracted signal to a baseband signal, and detect a predetermined signal; a sensing signal determiner configured to determine existence of the signal, output a determination result, and outputs a frequency selection generating signal when the predetermined signal is absent; and a frequency selection controller configured to output the frequency selection control signal by selecting a target band among a plurality of previously decided bands.

摘要翻译： 用于检测公共频带中的信号的装置包括：信号处理器，被配置为基于频率选择控制信号对所接收的无线信号进行滤波，从接收到的无线信号中提取所选频带信号，将提取的信号转换为基带信号， 并检测预定信号; 感测信号确定器，被配置为确定信号的存在，输出确定结果，并且当所述预定信号不存在时，输出频率选择产生信号; 以及频率选择控制器，被配置为通过在多个先前确定的频带中选择目标频带来输出频率选择控制信号。

公开(公告)号：US07729238B2

公开(公告)日：2010-06-01

申请号：US11635272

申请日：2006-12-07

申请人： Cheol-Ho Shin ,  Sung-Woo Choi ,  Sang-In Cho ,  Kyu-Min Kang ,  Sang-Sung Choi ,  Kwang-Roh Park

发明人： Cheol-Ho Shin ,  Sung-Woo Choi ,  Sang-In Cho ,  Kyu-Min Kang ,  Sang-Sung Choi ,  Kwang-Roh Park

IPC分类号： H04J11/00

CPC分类号： H04B1/7183 ,  H04L27/2605 ,  H04L27/265 ,  H04L27/2665

摘要： Provided is a method for adjusting Fast Fourier Transform (FFT) window positioning in a Multi Band Orthogonal Frequency Division Multiplexing Ultra-Wideband (MB-OFDM UWB) system. The method includes the steps of acquiring an initial FFT window position and a frequency hopping position, demodulating a received signal by using the initial FFT window position and the frequency hopping position acquired in the acquiring step, transmitting received data information to a Media Access Control (MAC) layer with a reception frame (RX frame) structure and judging at the MAC layer whether or not a packet error is occurred based on Frame Check Sequences (FCSs), and if no packet error is occurred, returning to the demodulating step, and if the packet error is occurred, changing a register map by using a predetermined interface line in a MAC-physical layer (MAC-PHY) interface to thereby adjust the FFT window position and the frequency hopping position, and then returning to the demodulating step.

摘要翻译： 提供了一种用于在多频带正交频分复用超宽带（MB-OFDM UWB）系统中调整快速傅里叶变换（FFT）窗口定位的方法。 该方法包括以下步骤：获取初始FFT窗口位置和跳频位置，通过使用在获取步骤中获取的初始FFT窗口位置和跳频位置解调接收信号，将接收的数据信息发送到介质访问控制（ MAC）层，并且在MAC层判断基于帧检查序列（FCS）是否发生分组错误，并且如果没有发生分组错误，则返回到解调步骤，并且 如果发生分组错误，则通过使用MAC-物理层（MAC-PHY）接口中的预定接口线来改变寄存器映射，从而调整FFT窗口位置和跳频位置，然后返回到解调步骤。

公开(公告)号：US20100094920A1

公开(公告)日：2010-04-15

申请号：US12536240

申请日：2009-08-05

申请人： Sang In Cho ,  Kyu-Min Kang ,  Sangsung Choi

发明人： Sang In Cho ,  Kyu-Min Kang ,  Sangsung Choi

IPC分类号： G06F17/14

CPC分类号： G06F17/142

摘要： A Fourier transform device generates a first sequence according to an input sequence based on a stored lookup table, and generates an output sequence by performing a butterfly operation on the first sequence a plurality of times. Therefore, hardware capacity and power consumption of the Fourier transform device can be reduced

摘要翻译： 傅里叶变换装置根据存储的查找表根据输入序列生成第一序列，并且通过多次对第一序列执行蝶形运算来生成输出序列。 因此，可以降低傅里叶变换装置的硬件容量和功耗

公开(公告)号：US20090154529A1

公开(公告)日：2009-06-18

申请号：US12110708

申请日：2008-04-28

申请人： Sang-In Cho ,  Kyu-Min Kang ,  Sang-Sung Choi

发明人： Sang-In Cho ,  Kyu-Min Kang ,  Sang-Sung Choi

IPC分类号： H04B1/713

CPC分类号： H04L27/2656 ,  H04B2001/71563 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675

摘要： Provided is a method and apparatus for acquiring OFDM synchronization even when it fails to detect a plurality of symbols at an initial stage. In the method, a frequency is adjusted to a first frequency band and a cross correlation value between a received preamble symbol and a preset preamble symbol is calculated. When the calculated cross correlation value is larger than a predetermined reference value and is first detected, frequency hopping is performed to receive subsequent symbols and cross correlation values to the subsequent symbols are reexamined. When the reexamined cross correlation value larger than the predetermined reference value is detected, timing synchronization, frequency offset estimation, and frame detection are performed.

摘要翻译： 提供了即使在初始阶段不能检测到多个符号的情况下也可以获取OFDM同步的方法和装置。 在该方法中，将频率调整为第一频带，并且计算所接收的前导码符号和预设前置码符号之间的互相关值。 当所计算的互相关值大于预定参考值并且被首先检测时，执行跳频以接收后续符号，并重新检查对后续符号的互相关值。 当检测到重新检查的大于预定参考值的互相关值时，执行定时同步，频率偏移估计和帧检测。

公开(公告)号：US20090147667A1

公开(公告)日：2009-06-11

申请号：US12189931

申请日：2008-08-12

申请人： Kyu-Min KANG ,  Sang-In Cho ,  Sangsung Choi

发明人： Kyu-Min KANG ,  Sang-In Cho ,  Sangsung Choi

IPC分类号： H04J11/00

CPC分类号： H04L27/2647

摘要： Provided is an apparatus and method for detecting a packet of a zero-padded OFDM signal, which are capable of determining if a packet exists in a reception (RX) signal by comparing a cross-correlation value of an OFDM signal delayed by a predetermined sample time, e.g., a zero-padded sample time, with a power value of the RX signal, thereby increasing a packet detection probability and preventing a false alarm. The packet detecting apparatus includes: a cross-correlation calculator for calculating a cross-correlation value of a reception signal received from the outside and delaying the calculated cross-correlation value by a predetermined sample time; a power calculator for calculating a power value of the reception signal; and a packet detector for determining if a packet exists in the reception signal by comparing the delayed cross-correlation value with the calculated power value, and detecting the corresponding packet.

摘要翻译： 提供了一种检测零填充OFDM信号的分组的装置和方法，其能够通过比较延迟了预定样本的OFDM信号的互相关值来确定在接收（RX）信号中是否存在分组 时间，例如零填充采样时间，具有RX信号的功率值，从而增加分组检测概率并防止误报。 分组检测装置包括：互相关计算器，用于计算从外部接收的接收信号的互相关值，并将所计算的互相关值延迟预定采样时间; 功率计算器，用于计算接收信号的功率值; 以及分组检测器，用于通过将延迟的互相关值与所计算的功率值进行比较来确定接收信号中是否存在分组，并检测相应的分组。

公开(公告)号：US07436915B2

公开(公告)日：2008-10-14

申请号：US11137468

申请日：2005-05-26

申请人： Kyu Min Kang ,  Bub Joo Kang ,  Sangsung Choi ,  Kwang Roh Park

发明人： Kyu Min Kang ,  Bub Joo Kang ,  Sangsung Choi ,  Kwang Roh Park

IPC分类号： H04B1/10

CPC分类号： H04B1/7176 ,  H04B1/7174 ,  H04B2201/70707

摘要： An FIR filter of a DS-CDMA UWB modem transmitter and a control method thereof are disclosed. The FIR filter includes an LUT control device for outputting a resultant value of “0” to all adders if data values corresponding to upper three chips H2, M2 and L2 and lower three chips H, M and L are “000000”, and discriminating which group between a first group and a second group the upper/lower data values belong to if the upper/lower data values are not“000000”. The LUT control device provides upper or lower LUT values to the adders using the upper or lower LUT values as they are, or converts the upper or lower LUT values into 2's complements and provides the converted values to the adders according to the discriminated first or second group.

摘要翻译： 公开了DS-CDMA UWB调制解调发射机的FIR滤波器及其控制方法。 如果对应于上三个码片H 2，M 2和L 2以及较低的三个码片H，M和L的数据值为“000000”，则FIR滤波器包括LUT控制装置，用于向所有加法器输出结果值“0” 并且如果所述上/下数据值不是“000000”，则鉴别所述上/下数据值属于第一组和第二组之间的组。 LUT控制装置使用上下LUT值向加法器提供上或下LUT值，或者将上或下LUT值转换为2的补码，并根据所识别的第一或第二值向加法器提供转换的值 组。

公开(公告)号：US07260374B2

公开(公告)日：2007-08-21

申请号：US10841591

申请日：2004-05-06

申请人： Hyung-Soo Lee ,  Sang-In Cho ,  Kyu-Min Kang ,  Chang-Joo Kim

发明人： Hyung-Soo Lee ,  Sang-In Cho ,  Kyu-Min Kang ,  Chang-Joo Kim

IPC分类号： H04B1/06

CPC分类号： H04W52/52 ,  H03G3/3052 ,  H03G2201/103 ,  H03G2201/502 ,  H03G2201/702 ,  H04B1/71637

摘要： Disclosed is a method for controlling power level of received signal in an ultra wide band transmission system which uses multi frequency bands, and includes a pre-gain controller (PGC) and a voltage gain amplifier (VGA). The method for controlling a power level of a received signal includes the steps of: a) at the PGCs, detecting which multi frequency band is used in a transmitter of the transmission system; b) at the PGCs, obtaining the voltage gain owing to the discrepancy in the power levels of the received signals; and c) at the PGCs, compensating for the power loss based on the voltage gain.

摘要翻译： 公开了一种在使用多频带的超宽带传输系统中控制接收信号的功率电平的方法，包括预增益控制器（PGC）和电压增益放大器（VGA）。 用于控制接收信号的功率电平的方法包括以下步骤：a）在PGC检测在传输系统的发射机中使用哪个多频带; b）在PGC处，由于接收到的信号的功率电平的差异而获得电压增益; 和c）在PGC处，基于电压增益来补偿功率损耗。

公开(公告)号：US20070133670A1

公开(公告)日：2007-06-14

申请号：US11635937

申请日：2006-12-08

申请人： Kyu-Min Kang ,  Cheol-Ho Shin ,  Sung-Woo Choi ,  Sang-In Cho ,  Sang-Sung Choi ,  Kwang-Rob Park

发明人： Kyu-Min Kang ,  Cheol-Ho Shin ,  Sung-Woo Choi ,  Sang-In Cho ,  Sang-Sung Choi ,  Kwang-Rob Park

IPC分类号： H03H7/30

CPC分类号： H04L25/03038 ,  H04L2025/03439

摘要： A parallel equalizer for a DS-CDMA UWB system and method thereof are provided. The parallel equalizer includes: a filter block for filtering a training input signal in a ‘training mode’, and filtering the plurality of input signals in parallel in a ‘symbol decision mode’; a symbol decision block for obtaining a symbol error based on a output from the filter block and a training symbol in the ‘training mode’, and estimating a transmission symbol for each of the input signals in the ‘symbol decision mode’, obtaining an error of one among the estimated transmission symbols for a symbol error calculating input signal; and an weight update block for updating a filter tap coefficients of the filter block based on the training input signal or the symbol error calculating input signal and the symbol error and transmitting the updated filter tap coefficients into the filter block.

摘要翻译： 提供了一种用于DS-CDMA UWB系统的并行均衡器及其方法。 并行均衡器包括：滤波器块，用于以“训练模式”对训练输入信号进行滤波，并且以“符号判定模式”并行地对多个输入信号进行滤波; 用于基于来自滤波块的输出和“训练模式”中的训练符号获得符号误差的符号判定块，并且以“符号判定模式”为每个输入信号估计发送符号，获得误差 估计的传输符号中的一个用于符号误差计算输入信号; 以及权重更新块，用于基于训练输入信号或符号误差计算输入信号和符号误差来更新滤波器块的滤波器抽头系数，并将更新的滤波器抽头系数发送到滤波器块。