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1. 发明授权

US08165229B2 Channel estimation method and apparatus in orthogonal frequency division multiplexing system 有权
标题翻译：正交频分复用系统中的信道估计方法及装置
公开(公告)号：US08165229B2
公开(公告)日：2012-04-24
申请号：US11942288
申请日：2007-11-19
申请人： Kyung-Hyun Paik , Hee-Jin Roh
发明人： Kyung-Hyun Paik , Hee-Jin Roh
IPC分类号： H04K1/10
CPC分类号： H04L27/2647 , H04L5/0007 , H04L5/0048 , H04L25/022 , H04L25/0226 , H04L25/0232
摘要： Disclosed is a channel estimation method and apparatus in an OFDM system. The method includes performing channel estimation at a pilot position of a received symbol, thereby calculating a first channel estimate, performing diagonal interpolation between the first channel estimate and a channel estimate for another pilot position that is different from the first pilot position, thereby calculating a second channel estimate for a data position, performing time interpolation between the second channel estimate and a channel estimate for another pilot position that is identical to the second pilot position, thereby calculating a third channel estimate for another data position, and performing frequency interpolation by using the channel estimates for the pilot positions and the second and third channel estimates, thereby calculating channel estimates for remaining data positions.
摘要翻译：公开了OFDM系统中的信道估计方法和装置。该方法包括在接收到的符号的导频位置执行信道估计，由此计算第一信道估计，在第一信道估计与不同于第一导频位置的另一导频位置的信道估计之间执行对角插值，由此计算对于数据位置的第二信道估计，对第二信道估计和与第二导频位置相同的另一导频位置的信道估计进行时间插值，由此计算另一数据位置的第三信道估计，并且使用对于导频位置和第二和第三信道估计的信道估计，从而计算剩余数据位置的信道估计。

2. 发明申请

US20080123758A1 CHANNEL ESTIMATION METHOD AND APPARATUS IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 有权
标题翻译：正交频分多路复用系统中的信道估计方法及装置
公开(公告)号：US20080123758A1
公开(公告)日：2008-05-29
申请号：US11942288
申请日：2007-11-19
申请人： Kyung-Hyun PAIK , Hee-Jin Roh
发明人： Kyung-Hyun PAIK , Hee-Jin Roh
IPC分类号： H04L27/28
CPC分类号： H04L27/2647 , H04L5/0007 , H04L5/0048 , H04L25/022 , H04L25/0226 , H04L25/0232
摘要： Disclosed is a channel estimation method and apparatus in an OFDM system. The method includes performing channel estimation at a pilot position of a received symbol, thereby calculating a first channel estimate, performing diagonal interpolation between the first channel estimate and a channel estimate for another pilot position that is different from the first pilot position, thereby calculating a second channel estimate for a data position, performing time interpolation between the second channel estimate and a channel estimate for another pilot position that is identical to the second pilot position, thereby calculating a third channel estimate for another data position, and performing frequency interpolation by using the channel estimates for the pilot positions and the second and third channel estimates, thereby calculating channel estimates for remaining data positions.
摘要翻译：公开了OFDM系统中的信道估计方法和装置。该方法包括在接收到的符号的导频位置执行信道估计，由此计算第一信道估计，在第一信道估计与不同于第一导频位置的另一导频位置的信道估计之间执行对角插值，由此计算对于数据位置的第二信道估计，对第二信道估计和与第二导频位置相同的另一导频位置的信道估计进行时间插值，由此计算另一数据位置的第三信道估计，并且使用对于导频位置和第二和第三信道估计的信道估计，从而计算剩余数据位置的信道估计。

3. 发明申请

US20070230601A1 Channel estimation method and apparatus using linear interpolation scheme in orthogonal frequency division multiplexing system and receiver using the same 有权
标题翻译：在正交频分复用系统和接收机中使用线性插值方案的信道估计方法和装置
公开(公告)号：US20070230601A1
公开(公告)日：2007-10-04
申请号：US11706071
申请日：2007-02-14
申请人： Eun-Jeong Yim , Hee-Jin Roh
发明人： Eun-Jeong Yim , Hee-Jin Roh
IPC分类号： H04K1/10
CPC分类号： H04L25/0232 , H04L5/0007 , H04L5/0048 , H04L25/0236
摘要： Disclosed are a channel estimation method and a channel estimation apparatus, and a receiver using the same. The channel estimation apparatus provided in the receiver detects pilot signals from radio signals and estimates channels of the detected pilot signals. The channel estimation apparatus estimates channels corresponding to data by conducting linear interpolation, which allows for simultaneous interpolation in time and frequency axes, by use of information on the estimated pilot channels. Thus, the memory capacity required for the receiver can be reduced using channel estimation in which the simultaneous interpolation is conducted. Also, the performance of the receiver can be further improved in a wireless environment where the receiver moves at high speed.
摘要翻译：公开了信道估计方法和信道估计装置，以及使用其的接收机。在接收机中设置的信道估计装置从无线信号检测导频信号，并估计检测到的导频信号的信道。信道估计装置通过进行线性插值来估计与数据相对应的信道，其通过使用关于估计的导频信道的信息来允许在时间轴和频率轴上的同时插值。因此，可以使用其中进行同时插值的信道估计来减少接收机所需的存储器容量。此外，在接收机高速移动的无线环境中，可以进一步提高接收机的性能。

4. 发明申请

US20070153879A1 Apparatus and method for estimating and combining frequency errors in a mobile communication system 有权
标题翻译：用于估计和组合移动通信系统中的频率误差的装置和方法
公开(公告)号：US20070153879A1
公开(公告)日：2007-07-05
申请号：US11649020
申请日：2007-01-03
申请人： Dong-Kyoon Cho , Hee-Jin Roh , Jong-Han Lim
发明人： Dong-Kyoon Cho , Hee-Jin Roh , Jong-Han Lim
IPC分类号： H04B1/00 , H04L27/06
CPC分类号： H04L27/0014 , H04L2027/0053 , H04L2027/0065
摘要： An apparatus and method for estimating and combining frequency errors in a mobile communication system. A controller divides data received from a main base station (BS) and control information received from a neighbor BS and controls allocation to fingers. A main automatic frequency control (AFC) loop is formed by estimating and combining frequency errors of the data received from the main BS. A sub AFC loop is formed by subtracting a corrected value of the main AFC loop after estimating and combining frequency errors of the control information received from the neighbor BS.
摘要翻译：一种用于估计和组合移动通信系统中的频率误差的装置和方法。控制器分割从主基站（BS）接收的数据和从相邻BS接收的控制信息，并控制对手指的分配。通过估计和组合从主BS接收到的数据的频率误差来形成主自动频率控制（AFC）环路。在估计并组合从邻近BS接收到的控制信息的频率误差之后，通过减去主AFC循环的校正值来形成子AFC循环。

5. 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。

6. 发明申请

US20060233359A1 Apparatus, method and system for providing a broadcasting service in a digital broadcasting system with a single frequency network 审中-公开
标题翻译：在具有单频网络的数字广播系统中提供广播服务的装置，方法和系统
公开(公告)号：US20060233359A1
公开(公告)日：2006-10-19
申请号：US11406598
申请日：2006-04-19
申请人： Suk-Jin Jung , Hee-Jin Roh , Kyung-Ha Lee
发明人： Suk-Jin Jung , Hee-Jin Roh , Kyung-Ha Lee
IPC分类号： H04L9/30
CPC分类号： H04H60/23 , H04H20/02 , H04H20/28 , H04H20/67 , H04H60/16 , H04H60/21
摘要： An apparatus, method, and system for providing a broadcasting service in a Digital Multimedia Broadcasting (DMB) system with a Single Frequency Network (SFN). Networks of shadow and non-shadow regions can be distinguished in the digital broadcasting system. A conditional access system can be used in the shadow region. A terminal can select a service network. A broadcasting providing server encrypts broadcasting service data, generates private and public keys into which predetermined encryption keys are divided to decrypt the encrypted broadcasting service data, sets at least one broadcasting transmitter for transmitting the private key and/or at least one broadcasting transmitter for transmitting the public key, and provides the encryption keys along with the encrypted broadcasting service data. Broadcasting transmitters transmit the encrypted broadcasting service data received from the broadcasting providing server and the private key using the SFN. At least one of the broadcasting transmitters further transmits the public key.
摘要翻译：一种用于在具有单频网（SFN）的数字多媒体广播（DMB）系统中提供广播服务的装置，方法和系统。可以在数字广播系统中区分影子和非阴影区域的网络。阴影区域中可以使用条件访问系统。终端可以选择服务网络。广播提供服务器对广播服务数据进行加密，生成专用密钥和公开密钥，将预先分配的加密密钥分解成加密广播服务数据，设置至少一个用于发送专用密钥的广播发送器和/或至少一个用于发送的广播发射机公开密钥，并且与加密的广播服务数据一起提供加密密钥。广播发射机使用SFN发送从广播提供服务器接收的加密广播服务数据和私钥。至少一个广播发射机进一步发送公开密钥。

7. 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。

8. 发明授权

US08351550B2 Correlation apparatus and method for frequency synchronization in broadband wireless access communication system 有权
标题翻译：宽带无线接入通信系统中频率同步的相关装置和方法
公开(公告)号：US08351550B2
公开(公告)日：2013-01-08
申请号：US12363484
申请日：2009-01-30
申请人： Hee-Jin Roh , Jeoung-Gil Lee , Su-Jin Yoon , Hoon Kang , Chang-Hyun Baik , Jun-Kyu Kang , Hyung-Jin Choi , Se-Bin Im , Dae-Hong Lee
发明人： Hee-Jin Roh , Jeoung-Gil Lee , Su-Jin Yoon , Hoon Kang , Chang-Hyun Baik , Jun-Kyu Kang , Hyung-Jin Choi , Se-Bin Im , Dae-Hong Lee
IPC分类号： H03D1/00
CPC分类号： H04L27/2688 , H04L27/2659 , H04L27/2672 , H04L27/2675
摘要： A correlation apparatus and method for frequency synchronization are provided. A frequency synchronization method of a receiver in a broadband wireless access communication system includes acquiring a highest correlation value by conducting a differential correlation of a variable interval between a received signal and a reference signal and performing a frequency synchronization according to the highest correlation value.
摘要翻译：提供了一种用于频率同步的相关装置和方法。宽带无线接入通信系统中的接收机的频率同步方法包括通过对接收信号和参考信号进行可变间隔的差分相关，并根据最高相关值进行频率同步来获取最高相关值。

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

US07609615B2 Method and apparatus for performing channel compensation and symbol demodulation for coherent demodulation in an OFDM system 有权
标题翻译：在OFDM系统中进行相干解调的信道补偿和符号解调的方法和装置
公开(公告)号：US07609615B2
公开(公告)日：2009-10-27
申请号：US11455784
申请日：2006-06-20
申请人： Eun-Jeong Yim , Ji-Won Ha , Hee-Jin Roh , Sung-Jin Park
发明人： Eun-Jeong Yim , Ji-Won Ha , Hee-Jin Roh , Sung-Jin Park
IPC分类号： H04L5/12
CPC分类号： H04L25/0212 , H04L25/03292 , H04L25/03318 , H04L27/2649
摘要： A method and apparatus for performing channel compensation and symbol demodulation using an estimated channel impulse response during coherent demodulation of a received Orthogonal Frequency Division Multiplexing (OFDM) signal are provided. In the apparatus, an FFT processor IFFT-processes a received signal. A channel compensator generates a channel-compensated signal by multiplying the FFT received signal by an estimated channel impulse response and calculates the power of the estimated channel impulse response. A symbol demodulator sets the power of the estimated channel impulse response as a reference point defining a minimum distance between signal points in a signal constellation, and decides soft metric values for channel decoding using the reference point and I-channel and Q-channel signal components of the channel-compensated signal. A decoder recovers information bits by decoding the soft metric values.
摘要翻译：提供一种在接收到的正交频分复用（OFDM）信号的相干解调期间使用估计的信道脉冲响应进行信道补偿和符号解调的方法和装置。在该装置中，FFT处理器IFFT处理接收到的信号。信道补偿器通过将FFT接收信号乘以估计的信道脉冲响应来产生信道补偿信号，并且计算估计的信道脉冲响应的功率。符号解调器将估计的信道脉冲响应的功率设置为定义信号星座中的信号点之间的最小距离的参考点，并且使用参考点和I信道和Q信道信号分量来确定用于信道解码的软度量值的信道补偿信号。解码器通过解码软度量值来恢复信息比特。

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