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1. 发明授权

US07733971B2 Apparatus and method for recovering frequency in an orthogonal frequency division multiplexing system 有权
标题翻译：在正交频分复用系统中恢复频率的装置和方法
公开(公告)号：US07733971B2
公开(公告)日：2010-06-08
申请号：US11606353
申请日：2006-11-30
申请人： Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
发明人： Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
IPC分类号： H04K1/10
CPC分类号： H04L27/266 , H04L27/2659 , H04L27/2675 , H04L27/2686
摘要： An apparatus and method for recovering a carrier frequency of a received signal using a predefined symbol in an OFDM system is provided. A maximum value detector detects at least three values and their corresponding offsets in descending order among auto-correlation values calculated within a specific frequency offset range between a received signal and a predefined symbol. A frequency offset corrector compares a ratio of a first auto-correlation value to a second auto-correlation value with a predetermined first threshold, determines whether first and second frequency offsets corresponding to the first and second auto-correlation values are adjacent to each other if the ratio of the auto-correlation values is less than the first threshold, and determines an initial carrier frequency offset using a difference between the first frequency offset and a frequency offset correction value determined according to system, if the first and second frequency offsets are adjacent to each other and a ratio of the second auto-correlation value and a third auto-correlation value is greater than a predetermined second threshold.
摘要翻译：提供了一种用于在OFDM系统中使用预定符号来恢复接收信号的载波频率的装置和方法。最大值检测器在接收信号和预定义符号之间的特定频率偏移范围内计算的自相关值之中以降序检测至少三个值及其相应的偏移。频率偏移校正器将第一自相关值与第二自相关值的比率与预定的第一阈值进行比较，确定与第一和第二自相关值对应的第一和第二频率偏移是否彼此相邻如果所述自相关值的比率小于所述第一阈值，并且如果所述第一和第二频率偏移相邻，则使用根据系统确定的所述第一频率偏移和频率偏移校正值之间的差来确定初始载波频率偏移并且第二自相关值和第三自相关值的比率大于预定的第二阈值。

2. 发明申请

US20070133391A1 Apparatus and method for carrier frequency synchronization in an OFDM system 有权
标题翻译： OFDM系统中载波频率同步的装置和方法
公开(公告)号：US20070133391A1
公开(公告)日：2007-06-14
申请号：US11605484
申请日：2006-11-29
申请人： Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
发明人： Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
IPC分类号： H04J11/00 , H04J1/00
CPC分类号： H04L27/2675 , H04L27/2659 , H04L27/2672 , H04L27/2684 , H04L27/2688
摘要： 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.
摘要翻译：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。

3. 发明申请

US20070133699A1 Apparatus and method for recovering frequency in an orthogonal frequency division multiplexing system 有权
标题翻译：在正交频分复用系统中恢复频率的装置和方法
公开(公告)号：US20070133699A1
公开(公告)日：2007-06-14
申请号：US11606353
申请日：2006-11-30
申请人： Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
发明人： Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
IPC分类号： H04K1/10
CPC分类号： H04L27/266 , H04L27/2659 , H04L27/2675 , H04L27/2686
摘要： An apparatus and method for recovering a carrier frequency of a received signal using a predefined symbol in an OFDM system is provided. A maximum value detector detects at least three values and their corresponding offsets in descending order among auto-correlation values calculated within a specific frequency offset range between a received signal and a predefined symbol. A frequency offset corrector compares a ratio of a first auto-correlation value to a second auto-correlation value with a predetermined first threshold, determines whether first and second frequency offsets corresponding to the first and second auto-correlation values are adjacent to each other if the ratio of the auto-correlation values is less than the first threshold, and determines an initial carrier frequency offset using a difference between the first frequency offset and a frequency offset correction value determined according to system, if the first and second frequency offsets are adjacent to each other and a ratio of the second auto-correlation value and a third auto-correlation value is greater than a predetermined second threshold.
摘要翻译：提供了一种用于在OFDM系统中使用预定符号来恢复接收信号的载波频率的装置和方法。最大值检测器在接收信号和预定义符号之间的特定频率偏移范围内计算的自相关值之中以降序检测至少三个值及其相应的偏移。频率偏移校正器将第一自相关值与第二自相关值的比率与预定的第一阈值进行比较，确定与第一和第二自相关值对应的第一和第二频率偏移是否彼此相邻如果所述自相关值的比率小于所述第一阈值，并且如果所述第一和第二频率偏移相邻，则使用根据系统确定的所述第一频率偏移和频率偏移校正值之间的差来确定初始载波频率偏移并且第二自相关值和第三自相关值的比率大于预定的第二阈值。

4. 发明授权

US07693039B2 Apparatus and method for carrier frequency synchronization in an OFDM system 有权
标题翻译： OFDM系统中载波频率同步的装置和方法
公开(公告)号：US07693039B2
公开(公告)日：2010-04-06
申请号：US11605484
申请日：2006-11-29
申请人： Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
发明人： Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
IPC分类号： H04J1/00 , H04L7/00
CPC分类号： H04L27/2675 , H04L27/2659 , H04L27/2672 , H04L27/2684 , H04L27/2688
摘要： 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.
摘要翻译：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。

5. 发明授权

US07688149B2 Phase locked loop, phase detecting method for the phase locked loop, and receiver using the same 有权
标题翻译：锁相环，锁相环的相位检测方法和使用该锁相环的接收机
公开(公告)号：US07688149B2
公开(公告)日：2010-03-30
申请号：US11453852
申请日：2006-06-16
申请人： Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
发明人： Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
IPC分类号： H03L7/093
CPC分类号： H03L7/085 , G01R25/005 , H04L7/033
摘要： A Phase Locked Loop (PLL) is provided for improving acquisition performance in an acquisition state, while preventing performance degradation in a steady state under a low SNR environment, during phase detection, a phase detecting method for the PLL, and a receiver using the same. The PLL determines a period to which an input signal belongs according to the input signal and a feedback signal, outputs an error signal corresponding to the input signal by using a formula (or algorithm) set for the determined period, oscillates a predetermined frequency signal according to the error signal, and feeds back the oscillated signal.
摘要翻译：提供锁相环（PLL），用于在采集状态下改善采集性能，同时在相位检测期间防止在低SNR环境下的稳定状态下的性能下降，PLL的相位检测方法和使用该锁相环的接收机。 PLL根据输入信号和反馈信号确定输入信号所属的周期，通过使用为所确定的周期设置的公式（或算法）输出与输入信号相对应的误差信号，根据到错误信号，并反馈振荡的信号。

6. 发明申请

US20060284690A1 Phase locked loop, phase detecting method for the phase locked loop, and receiver using the same 有权
标题翻译：锁相环，锁相环的相位检测方法和使用该锁相环的接收机
公开(公告)号：US20060284690A1
公开(公告)日：2006-12-21
申请号：US11453852
申请日：2006-06-16
申请人： Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
发明人： Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
IPC分类号： H03L7/00
CPC分类号： H03L7/085 , G01R25/005 , H04L7/033
摘要： A Phase Locked Loop (PLL) is provided for improving acquisition performance in an acquisition state, while preventing performance degradation in a steady state under a low SNR environment, during phase detection, a phase detecting method for the PLL, and a receiver using the same. The PLL determines a period to which an input signal belongs according to the input signal and a feedback signal, outputs an error signal corresponding to the input signal by using a formula (or algorithm) set for the determined period, oscillates a predetermined frequency signal according to the error signal, and feeds back the oscillated signal.
摘要翻译：提供锁相环（PLL），用于在采集状态下改善采集性能，同时在相位检测期间防止在低SNR环境下的稳定状态下的性能下降，PLL的相位检测方法和使用该锁相环的接收机。 PLL根据输入信号和反馈信号确定输入信号所属的周期，通过使用为所确定的周期设置的公式（或算法）输出与输入信号相对应的误差信号，根据到错误信号，并反馈振荡的信号。

7. 发明申请

US20070019761A1 Apparatus and method for receiving broadcasting service in a broadcasting system 有权
标题翻译：在广播系统中接收广播服务的装置和方法
公开(公告)号：US20070019761A1
公开(公告)日：2007-01-25
申请号：US11488645
申请日：2006-07-19
申请人： Sung-Jin Park , Hee-Jin Roh , Min-Goo Kim , Hyun-Seok Oh
发明人： Sung-Jin Park , Hee-Jin Roh , Min-Goo Kim , Hyun-Seok Oh
IPC分类号： H04L27/06
CPC分类号： H04L25/067 , H04L1/0054 , H04L1/0071 , H04L2001/0093
摘要： A broadcasting receiving apparatus and method in a broadcasting system are provided. In a broadcasting receiver, a demodulator demodulates a received broadcasting signal, clips a soft metric value for the demodulated signal to a number of bits, and outputs the clipped soft metric value. A mapper maps the clipped soft metric value to an index value with a resolution inversely proportional to the quantization level of the soft metric value. A deinterleaver deinterleaves the index value and a demapper demaps the deinterleaved index value to a representative value being a soft metric value from a range of soft metric values mapped to the index value. A channel decoder decodes the representative value.
摘要翻译：提供广播系统中的广播接收装置和方法。在广播接收机中，解调器解调所接收的广播信号，将解调信号的软度量值剪除为多个比特，并输出限幅软度量值。映射器将限幅软度量值映射到具有与软度量值的量化级别成反比的分辨率的索引值。解交织器对索引值进行解交织，并且解映射器将解交织的索引值从映射到索引值的软度量值的范围中解映射为作为软度量值的代表值。通道解码器解码代表值。

8. 发明申请

US20050281240A1 Apparatus and method for efficiently transmitting broadcasting channel utilizing cyclic delay diversity 有权
标题翻译：利用循环延迟分集有效地发送广播信道的装置和方法
公开(公告)号：US20050281240A1
公开(公告)日：2005-12-22
申请号：US11149586
申请日：2005-06-10
申请人： Hyun-Seok Oh , Hee-Jin Roh , Sung-Soo Kim , Min-Goo Kim
发明人： Hyun-Seok Oh , Hee-Jin Roh , Sung-Soo Kim , Min-Goo Kim
IPC分类号： H04J11/00 , H04B7/02 , H04B7/06 , H04B7/26 , H04L27/26 , H04W4/06 , H04W16/28 , H04W56/00 , H04W88/02 , H04J1/00
CPC分类号： H04L27/2602 , H04B7/0671
摘要： Disclosed are an apparatus and a method for efficiently transmitting a broadcasting channel by means of cyclic delay diversity in an OFDM mobile communication system. The method comprises the steps of setting each transmitter to have different delay values, the transmitter providing a service to adjacent service areas, generating OFDM signals including the broadcasting data by said each transmitter, delaying the OFDM signals by means of the different delay values, and transmitting the delayed OFDM signals by means of each transmitting apparatus.
摘要翻译：公开了一种在OFDM移动通信系统中通过循环延迟分集来有效地发送广播信道的装置和方法。该方法包括以下步骤：将每个发射机设置为具有不同的延迟值，所述发射机向相邻业务区域提供业务，由所述每个发射机产生包括广播数据的OFDM信号，借助于不同的延迟值来延迟OFDM信号;以及通过每个发送装置发送延迟的OFDM信号。

9. 发明授权

US07656973B2 Apparatus and method for receiving broadcasting service in a broadcasting system 有权
标题翻译：在广播系统中接收广播服务的装置和方法
公开(公告)号：US07656973B2
公开(公告)日：2010-02-02
申请号：US11488645
申请日：2006-07-19
申请人： Sung-Jin Park , Hee-Jin Roh , Min-Goo Kim , Hyun-Seok Oh
发明人： Sung-Jin Park , Hee-Jin Roh , Min-Goo Kim , Hyun-Seok Oh
IPC分类号： H04L27/06
CPC分类号： H04L25/067 , H04L1/0054 , H04L1/0071 , H04L2001/0093
摘要： A broadcasting receiving apparatus and method in a broadcasting system are provided. In a broadcasting receiver, a demodulator demodulates a received broadcasting signal, clips a soft metric value for the demodulated signal to a number of bits, and outputs the clipped soft metric value. A mapper maps the clipped soft metric value to an index value with a resolution inversely proportional to the quantization level of the soft metric value. A deinterleaver deinterleaves the index value and a demapper demaps the deinterleaved index value to a representative value being a soft metric value from a range of soft metric values mapped to the index value. A channel decoder decodes the representative value.
摘要翻译：提供广播系统中的广播接收装置和方法。在广播接收机中，解调器解调所接收的广播信号，将解调信号的软度量值剪除为多个比特，并输出限幅软度量值。映射器将限幅软度量值映射到具有与软度量值的量化级别成反比的分辨率的索引值。解交织器对索引值进行解交织，并且解映射器将解交织的索引值从映射到索引值的软度量值的范围中解映射为作为软度量值的代表值。通道解码器解码代表值。

10. 发明授权

US07327714B2 Apparatus and method for detecting a time division multiplexing frame in a mobile communication system 有权
标题翻译：用于在移动通信系统中检测时分多路复用帧的装置和方法
公开(公告)号：US07327714B2
公开(公告)日：2008-02-05
申请号：US11142353
申请日：2005-06-02
申请人： Hee-Jin Roh , Min-Goo Kim
发明人： Hee-Jin Roh , Min-Goo Kim
IPC分类号： H04B7/212
CPC分类号： H04L1/0054 , H04L1/0061 , H04L1/0068 , H04L1/0072 , H04L1/20 , H04L1/201
摘要： An apparatus and a method are provided for improving reception reliability for control channels by detecting time division multiple (TDM) frames transmitted through the control channels in a TDM mobile communication system. The apparatus and method include receiving the frame through the forward control channel and performing a cyclic redundancy checking (CRC) with respect to the frame, thereby outputting a first error detection bit, measuring reception power for the frame, calculating a first path metric when decoding a channel of the frame, estimating a second path metric by using the first path metric and the reception power, and outputting a second error detection bit by comparing the second path metric with a predetermined threshold value, and creating and outputting a frame quality bit for detecting validity of the frame based on the first and second error detection bits.
摘要翻译：提供了一种通过检测通过TDM移动通信系统中的控制信道发送的时分复用（TDM）帧来提高控制信道的接收可靠性的装置和方法。该装置和方法包括：通过前向控制信道接收帧，对该帧执行循环冗余校验（CRC），从而输出测量该帧的接收功率的第一错误检测比特，当解码时计算第一路径量度帧的信道，通过使用第一路径度量和接收功率来估计第二路径量度，并且通过将第二路径度量与预定阈值进行比较来输出第二错误检测比特，并且创建并输出帧质量比特，基于第一和第二错误检测位来检测帧的有效性。

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