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11. 发明授权

US09191259B2 Method and device for sensing frequency for OFDM systems 有权
标题翻译：用于感测OFDM系统频率的方法和装置
公开(公告)号：US09191259B2
公开(公告)日：2015-11-17
申请号：US13884175
申请日：2011-10-25
申请人： Sang In Cho , Kyu Min Kang
发明人： Sang In Cho , Kyu Min Kang
IPC分类号： H04L27/06 , H04L27/26 , H04L27/00
CPC分类号： H04L27/265 , H04L27/0006 , H04L27/2647
摘要： Provided is a frequency sensing method and apparatus in an orthogonal frequency division multiplexing (OFDM) system. Provided is a method of sensing a frequency of a received signal that is received from an outside in order to perform one of a plurality of radio communications. An OFDM apparatus may need to inspect a required frequency band before or after performing one of the plurality of radio communications, and to determine whether the frequency band is being used by another radio communication.
摘要翻译：提供了一种正交频分复用（OFDM）系统中的频率感测方法和装置。提供了一种感测从外部接收的接收信号的频率以便执行多个无线电通信之一的方法。 OFDM装置可能需要在执行多个无线电通信之一之前或之后检查所需的频带，并且确定频带是否被另一个无线电通信使用。

12. 发明授权

US08009728B2 Parallel equalizer for DS-CDMA UWB system and method thereof 失效
标题翻译： DS-CDMA UWB系统的并行均衡器及其方法
公开(公告)号：US08009728B2
公开(公告)日：2011-08-30
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-Roh Park
发明人： Kyu-Min Kang , Cheol-Ho Shin , Sung-Woo Choi , Sang-In Cho , Sang-Sung Choi , Kwang-Roh 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错误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中。

13. 发明授权

US07831649B2 Method for transforming data by look-up table 有权
标题翻译：通过查找表转换数据的方法
公开(公告)号：US07831649B2
公开(公告)日：2010-11-09
申请号：US11576565
申请日：2005-11-02
申请人： Sang In Cho , Sang Sung Choi , Kwang Roh Park
发明人： Sang In Cho , Sang Sung Choi , Kwang Roh Park
IPC分类号： G06F17/14
CPC分类号： H04L27/263 , H04L27/265
摘要： Provided is a method for transforming data using a look-up table. The method includes the steps of: (a) mapping pre-processed input binary data to a constellation diagram divided into four quadrants to output a first complex number; (b) performing addition/subtraction operations between real numbers and between imaginary numbers with respect to the first complex number and a second complex number; and (c) reading a fourth complex from a look-up table in response to the first complex number, the second complex number and a third complex number, the look-up table outputting the fourth complex by performing a subtraction operation on multiplication results between real numbers and between imaginary numbers and an addition operation on multiplication results between the real numbers and the imaginary numbers with respect to the result value of the step (b) and the third complex number. Accordingly, it is possible to reduce the hardware size at the time of IFFT/FFT design and to provide a high-speed, low-power operation.
摘要翻译：提供了一种使用查找表来转换数据的方法。该方法包括以下步骤：（a）将预处理的输入二进制数据映射到分成四个象限的星座图，以输出第一个复数; （b）相对于第一复数和第二复数执行实数之间和虚数之间的加法/减法运算; 以及（c）响应于第一复数，第二复数和第三复数，从查找表读取第四复数，查找表通过对乘法结果执行减法运算来输出第四复数实数和虚数之间以及相对于步骤（b）和第三复数的结果值的实数和虚数之间的相乘结果的加法运算。因此，可以在IFFT / FFT设计时降低硬件尺寸并提供高速，低功率操作。

14. 发明授权

US07693924B2 2N-point and N-point FFT/IFFT dual mode processor 失效
标题翻译： 2N点和N点FFT / IFFT双模式处理器
公开(公告)号：US07693924B2
公开(公告)日：2010-04-06
申请号：US11264886
申请日：2005-11-02
申请人： Sang In Cho , Sangsung Choi , Kwang Roh Park
发明人： Sang In Cho , Sangsung Choi , Kwang Roh Park
IPC分类号： G06F17/14
CPC分类号： H04L27/265 , H04L27/263
摘要： A 2N-point and N-point FFT/IFFT dual mode processor is provided. The processor includes a butterfly operator, the first and second MUXs, and the first and second N-point FFT processors. The butterfly operator receives 2N data and butterfly-operates on the received 2N data when receiving a control signal ‘0’ from the controller. The first and second MUXs respectively receive results from the butterfly operator to output the results in an increment of N when receiving a control signal ‘0’ from the controller, and respectively outputs different N data when receiving a control signal ‘1’ from the controller. The first and second N-point FFT processors N-point FFT operate on the results from the first and second MUXs and respectively output the same under control of the controller. Since the N-point FFT operation can be simultaneously performed two times at a receiver, the performance of the receiver can be enhanced.
摘要翻译：提供2N点和N点FFT / IFFT双模式处理器。处理器包括蝶形运算符，第一和第二MUX以及第一和第二N点FFT处理器。当从控制器接收到控制信号“0”时，蝶形运算符接收2N个数据并对接收的2N数据进行蝶形运算。当从控制器接收到控制信号“0”时，第一和第二MUX分别接收蝶形运算器的结果以输出N的增量，并且当从控制器接收到控制信号“1”时分别输出不同的N数据。第一和第二N点FFT处理器N点FFT对来自第一和第二MUX的结果进行操作，并在控制器的控制下分别输出。由于在接收机可以同时进行N点FFT运算两次，所以可以提高接收机的性能。

15. 发明授权

US07660339B2 Apparatus and method for estimating and correcting frequency offset in MB-OFDM UWB system using time frequency hopping 失效
标题翻译：在使用时频跳频的MB-OFDM UWB系统中估计和校正频偏的装置和方法
公开(公告)号：US07660339B2
公开(公告)日：2010-02-09
申请号：US11634006
申请日：2006-12-05
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： H04B1/18 , H04B1/00
CPC分类号： H04L27/2657 , H04B1/7143 , H04B1/7163 , H04B2001/7154 , H04L27/2676
摘要： Provided are an apparatus and method for estimating and correcting a frequency offset in a multiband-Orthogonal Frequency Division Multiplexing Ultra-Wideband system using a time frequency hopping. The method includes the steps of: calculating a tangent input having a first value (X) and a second value (Y) by using PS symbols transferred over same frequency band with respect to one of a plurality of frequency bands used for frequency hopping; calculating tan(X/Y) using the first value (X) and the second value (Y), and calculating an index corresponding to the value of tan(X/Y) from a look-up table created by reflecting a relative frequency offset with respect to a center frequency; calculating indexes representing frequency offsets estimated with respect to remaining frequency bands used for frequency hopping from the look-up table by using the calculated index; extracting an index of a numerical controlled oscillator according to correction positions with respect to a plurality of frequency bands by using the calculated indexes; and correcting the frequency offsets estimated using the extracted indexes according to time frequency patterns by using a numerical controlled oscillator table.
摘要翻译：提供了一种用于使用时间跳频估计和校正多频带 - 正交频分复用超宽带系统中的频率偏移的装置和方法。该方法包括以下步骤：通过使用相对于用于跳频的多个频带之一的相同频带传输的PS符号来计算具有第一值（X）和第二值（Y）的切线输入; 使用第一值（X）和第二值（Y）计算tan（X / Y），并且从通过反映相对频率偏移产生的查找表计算与tan（X / Y）的值相对应的指数相对于中心频率; 计算表示使用所计算的索引从查找表中跳频所使用的剩余频带估计的频率偏移的索引; 通过使用计算出的索引，根据关于多个频带的校正位置提取数控振荡器的索引; 以及通过使用数控振荡器表，根据时间频率模式校正使用所提取的索引估计的频率偏移。

16. 发明申请

US20070133658A1 Apparatus and method for estimating and correcting frequency offset in MB-OFDM UWB system using time frequency hopping 失效
标题翻译：在使用时频跳频的MB-OFDM UWB系统中估计和校正频偏的装置和方法
公开(公告)号：US20070133658A1
公开(公告)日：2007-06-14
申请号：US11634006
申请日：2006-12-05
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： H04B1/00
CPC分类号： H04L27/2657 , H04B1/7143 , H04B1/7163 , H04B2001/7154 , H04L27/2676
摘要： Provided are an apparatus and method for estimating and correcting a frequency offset in a multiband-Orthogonal Frequency Division Multiplexing Ultra-Wideband system using a time frequency hopping. The method includes the steps of: calculating a tangent input having a first value (X) and a second value (Y) by using PS symbols transferred over same frequency band with respect to one of a plurality of frequency bands used for frequency hopping; calculating tan(X/Y) using the first value (X) and the second value (Y), and calculating an index corresponding to the value of tan(X/Y) from a look-up table created by reflecting a relative frequency offset with respect to a center frequency; calculating indexes representing frequency offsets estimated with respect to remaining frequency bands used for frequency hopping from the look-up table by using the calculated index; extracting an index of a numerical controlled oscillator according to correction positions with respect to a plurality of frequency bands by using the calculated indexes; and correcting the frequency offsets estimated using the extracted indexes according to time frequency patterns by using a numerical controlled oscillator table.
摘要翻译：提供了一种用于使用时间跳频估计和校正多频带 - 正交频分复用超宽带系统中的频率偏移的装置和方法。该方法包括以下步骤：通过使用相对于用于跳频的多个频带之一的相同频带传输的PS符号来计算具有第一值（X）和第二值（Y）的切线输入; 使用第一值（X）和第二值（Y）计算tan（X / Y），并且从通过反映相对频率偏移产生的查找表计算与tan（X / Y）的值相对应的指数相对于中心频率; 计算表示使用所计算的索引从查找表中跳频所使用的剩余频带估计的频率偏移的索引; 通过使用计算出的索引，根据关于多个频带的校正位置提取数控振荡器的索引; 以及通过使用数控振荡器表，根据时间频率模式校正使用所提取的索引估计的频率偏移。

17. 发明申请

US20050009490A1 Method for controlling power level of received signal in ultra wide band transmission system 失效
标题翻译：控制超宽带传输系统接收信号功率电平的方法
公开(公告)号：US20050009490A1
公开(公告)日：2005-01-13
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： H04B7/26 , H03G3/30 , H04B1/69 , H04B7/005 , H03F3/45
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。

18. 发明申请

US20130223575A1 METHOD AND DEVICE FOR SENSING FREQUENCY FOR OFDM SYSTEMS 有权
标题翻译： OFDM系统感测频率的方法和装置
公开(公告)号：US20130223575A1
公开(公告)日：2013-08-29
申请号：US13884175
申请日：2011-10-25
申请人： Sang In Cho , Kyu Min Kang
发明人： Sang In Cho , Kyu Min Kang
IPC分类号： H04L27/26
CPC分类号： H04L27/265 , H04L27/0006 , H04L27/2647
摘要： Provided is a frequency sensing method and apparatus in an orthogonal frequency division multiplexing (OFDM) system. Provided is a method of sensing a frequency of a received signal that is received from an outside in order to perform one of a plurality of radio communications. An OFDM apparatus may need to inspect a required frequency band before or after performing one of the plurality of radio communications, and to determine whether the frequency band is being used by another radio communication.
摘要翻译：提供了一种正交频分复用（OFDM）系统中的频率感测方法和装置。提供了一种感测从外部接收的接收信号的频率以便执行多个无线电通信之一的方法。 OFDM装置可能需要在执行多个无线电通信之一之前或之后检查所需的频带，并且确定频带是否被另一个无线电通信使用。

19. 发明申请

US20110130161A1 TERMINAL AND BASE STATION, AND FREQUENCY SENSING METHOD THEREOF 审中-公开
标题翻译：终端和基站及其频率感测方法
公开(公告)号：US20110130161A1
公开(公告)日：2011-06-02
申请号：US12873404
申请日：2010-09-01
申请人： Sang In CHO , Kyu-Min KANG , Heon Jin HONG
发明人： Sang In CHO , Kyu-Min KANG , Heon Jin HONG
IPC分类号： H04B1/10 , H04B1/16 , H04B7/00
CPC分类号： H04B1/1027
摘要： Provided are a terminal and a base station, and a frequency sensing method thereof. The terminal or the base station may filter a frequency band needing frequency sensing in the entire frequency band where the terminal or the base station may receive an input signal. It is possible to enhance a detection performance and rate of signals by applying frequency sensing to the filtered frequency band.
摘要翻译：提供一种终端和基站及其频率感测方法。终端或基站可以在终端或基站可以接收输入信号的整个频带中过滤需要频率感测的频带。可以通过对滤波后的频带应用频率感测来提高检测性能和信号速率。

20. 发明授权

US07953199B2 Synchronization error tracking device and method thereof 失效
标题翻译：同步误差跟踪装置及其方法
公开(公告)号：US07953199B2
公开(公告)日：2011-05-31
申请号：US12610604
申请日：2009-11-02
申请人： Kyu-Min Kang , Sang In Cho , Sung Woo Choi , Sangsung Choi
发明人： Kyu-Min Kang , Sang In Cho , Sung Woo Choi , Sangsung Choi
IPC分类号： H04L7/00 , H04L25/00 , H04L25/40
CPC分类号： H04B1/7183 , H04B1/7075
摘要： Provided is a synchronization error tracking device and method. The method and system estimates and corrects the synchronization error generated by time and frequency offsets during the data transmission interval and uses a module designed for initial synchronization or channel estimation without adding a new correlation operator. Further, a combining mark value and a synchronization position value acquired during the synchronization process are used.
摘要翻译：提供了一种同步误差跟踪装置和方法。该方法和系统估计并校正数据传输间隔期间由时间和频率偏移产生的同步误差，并使用设计用于初始同步或信道估计的模块，而不添加新的相关运算符。此外，使用在同步处理期间获取的组合标记值和同步位置值。

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