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。

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。

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。

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。

公开(公告)号：US20050286462A1

公开(公告)日：2005-12-29

申请号：US11165185

申请日：2005-06-24

申请人： Hee-Jin Roh ,  Min-goo Kim

发明人： Hee-Jin Roh ,  Min-goo Kim

IPC分类号： H04J11/00 ,  H04B7/02 ,  H04B7/26 ,  H04L1/00 ,  H04L1/06 ,  H04L27/26 ,  H04Q7/00

CPC分类号： H04L1/0625 ,  H04B7/022 ,  H04L1/0071 ,  H04L27/2602 ,  H04L27/2626 ,  H04L27/2647

摘要： An orthogonal frequency division multiplexing (OFDM) system with a multicell or multisector structure includes a plurality of base stations and mobile stations. Each of the base stations interleaves data for transmission to the mobile station, performs space-time coding (STC) on the interleaved data into a plurality of space-time code streams, selects one of the space-time code streams every predetermined code stream selection period such that different space-time code streams are transmitted to at least one cell or sector from among cells or sectors formed by the base station and other base stations, and outputs the selected space-time code stream as an OFDM symbol. Each of the mobile stations STC-decodes a space-time code stream obtained by performing Fourier transform on the OFDM symbol, deinterleaves the STC-decoded data, and channel-decodes the deinterleaved data into its original data.

摘要翻译： 具有多单元或多单元结构的正交频分复用（OFDM）系统包括多个基站和移动站。 每个基站交织用于传输到移动站的数据，对交织的数据执行空时编码（STC）为多个时空码流，每隔预定码流选择选择一个时空码流 周期，使得不同的时空码流从由基站和其他基站形成的小区或扇区中发送到至少一个小区或扇区，并将所选择的时空码流作为OFDM符号输出。 每个移动台STC对通过对OFDM符号执行傅里叶变换获得的时空码流进行解码，对STC解码的数据进行解交织，并将解交织的数据进行通道解码为其原始数据。

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。

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。

公开(公告)号：US20050286459A1

公开(公告)日：2005-12-29

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： H04B7/26 ,  H04J3/14 ,  H04L1/00 ,  H04L1/20 ,  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。

公开(公告)号：US20050265280A1

公开(公告)日：2005-12-01

申请号：US11136460

申请日：2005-05-25

申请人： Hee-Jin Roh ,  Min-Goo Kim

发明人： Hee-Jin Roh ,  Min-Goo Kim

IPC分类号： H04J11/00 ,  H04L1/06 ,  H04L27/26 ,  H04Q7/00

CPC分类号： H04L1/0668 ,  H04L27/2608

摘要： A method and apparatus for transmitting an orthogonal frequency division multiplexing (OFDM) symbol from a base station to a mobile station in a wireless mobile communication system with a multicell/multisector structure formed by a plurality of base stations. The base station receives a plurality of complex symbols to be transmitted to the mobile station. The base station performs space-time coding (STC) on the plurality of complex symbols and selects the STC-coded symbols such that different space-time code streams are transmitted to adjacent sectors among sectors formed by the base station and other base stations. In addition, a selection pattern of the space-time code streams is updated such that it is circulated every predetermined time period, thereby providing uniform sector diversity for all mobile stations located in a sector/cell boundary.

摘要翻译： 一种用于在具有由多个基站形成的多单元/多层结构的无线移动通信系统中从基站向移动站发送正交频分复用（OFDM）符号的方法和装置。 基站接收要发送到移动台的多个复数符号。 基站对多个复数符号执行空时编码（STC），并选择STC编码符号，使得不同的时空码流被发送到由基站和其他基站形成的扇区中的相邻扇区。 此外，更新空时编码流的选择模式，使得其在每个预定时间段循环，从而为位于扇区/单元边界中的所有移动站提供统一的扇区分集。

公开(公告)号：US07379477B2

公开(公告)日：2008-05-27

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： H04J3/00 ,  H04J1/00 ,  H04J3/06 ,  H04Q11/02

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，产生包括所述每个发射机的广播数据的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。