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1. 发明授权

US08165249B2 Apparatus and method for estimating and compensating time offset and/or carrier frequency offset in MIMO system based OFDM/OFDMA 有权
标题翻译：用于估计和补偿基于MIMO系统的OFDM / OFDMA中的时间偏移和/或载波频率偏移的装置和方法
公开(公告)号：US08165249B2
公开(公告)日：2012-04-24
申请号：US12439514
申请日：2007-08-30
申请人： Zheng Zi Li , Byung-Chul Kim , Sang-Bae Ji
发明人： Zheng Zi Li , Byung-Chul Kim , Sang-Bae Ji
IPC分类号： H04L27/06
CPC分类号： H04L27/2657 , H04B7/04 , H04L5/0023 , H04L5/0048 , H04L27/2662 , H04L27/2675 , H04L2027/003 , H04L2027/0095
摘要： The present invention relates to an apparatus and method for estimating and compensating for a time offset and a carrier frequency offset in a Multiple Input Multiple Output (MIMO) communication system that supports Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiplexing Access (OFDMA). According to the present invention, a phase difference of pilot signals of the same transmitting antenna, which are received through receiving antennas, is calculated. An arc tangent operation is then carried out on the phase difference of the pilot signals to calculate a time offset linear phase and/or a carrier frequency offset linear phase. Further, a time offset compensation value and/or a carrier frequency offset compensation value are found by employing the time offset linear phase and/or the carrier frequency offset linear phase. A time offset and/or a carrier frequency offset with respect to pilots and data are compensated for by employing the time offset compensation value and/or the carrier frequency offset compensation value.
摘要翻译：本发明涉及一种用于在支持正交频分复用（OFDM）或正交频分复用接入（OFDMA）的多输入多输出（MIMO）通信系统中估计和补偿时间偏移和载波频率偏移的装置和方法）。根据本发明，计算通过接收天线接收的相同发射天线的导频信号的相位差。然后对导频信号的相位差执行反正切运算，以计算时间偏移线性相位和/或载波频率偏移线性相位。此外，通过采用时间偏移线性相位和/或载波频率偏移线性相位来找到时间偏移补偿值和/或载波频率偏移补偿值。相对于导频和数据的时间偏移和/或载波频率偏移通过采用时间偏移补偿值和/或载波频率偏移补偿值来补偿。

2. 发明申请

US20130034175A1 APPARATUS AND METHOD FOR ESTIMATING CHANNEL IN OFDM/OFDMA BASED WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：基于OFDM / OFDMA的无线通信系统估计信道的装置和方法
公开(公告)号：US20130034175A1
公开(公告)日：2013-02-07
申请号：US13593120
申请日：2012-08-23
申请人： Byung-Chul Kim , Zheng Zi Li , Sang-Bae Ji
发明人： Byung-Chul Kim , Zheng Zi Li , Sang-Bae Ji
IPC分类号： H04J11/00
CPC分类号： H04L25/0204 , H04L5/0042 , H04L5/0048 , H04L25/022 , H04L25/0232 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L27/2675
摘要： A method for transmitting pilots in a wireless communication system includes generating first two pilots for a first antenna. Second two pilots for a second antenna are generated by multiplying the first two pilots with two weight values respectively. The first two pilots are transmitted over two Orthogonal Frequency Division Multiplexing (OFDM) symbols via the first antenna. The second two pilots are transmitted over the two OFDM symbols via the second antenna, wherein each weight value is determined based on a value used to obtain a symbol index of a corresponding OFDM symbol of the two OFDM symbols within a slot. Symbol indexes for the two OFDM symbols are consecutive, and the two weight values are different with each other.
摘要翻译：一种用于在无线通信系统中发送导频的方法包括为第一天线产生前两个导频。通过将前两个飞行员分别乘以两个加权值来生成第二个天线的第二个两个导频。前两个导频经由第一天线通过两个正交频分复用（OFDM）符号传输。第二个两个导频经由第二天线在两个OFDM符号上传输，其中每个权重值基于用于获得时隙内的两个OFDM符号的对应OFDM符号的符号索引的值来确定。两个OFDM符号的符号索引是连续的，并且两个权重值彼此不同。

3. 发明申请

US20100027698A1 APPARATUS AND METHOD FOR ESTIMATING CHANNEL IN OFDM/OFDMA BASED WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：基于OFDM / OFDMA的无线通信系统估计信道的装置和方法
公开(公告)号：US20100027698A1
公开(公告)日：2010-02-04
申请号：US12445129
申请日：2007-10-11
申请人： Byung-Chul Kim , Zheng Zi Li , Sang-Bae Ji
发明人： Byung-Chul Kim , Zheng Zi Li , Sang-Bae Ji
IPC分类号： H04L27/28
CPC分类号： H04L25/0204 , H04L5/0042 , H04L5/0048 , H04L25/022 , H04L25/0232 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L27/2675
摘要： A channel estimation apparatus of the present invention includes a preamble channel operation unit for carrying out an operation on pilot channel estimation values of pilots, which are transmitted from a transmitting antenna that transmits a preamble, as an improved pilot channel estimation value by employing a preamble channel estimation value based on a preamble included in received signals respectively received by a plurality of receiving antennas, a first channel estimation unit for estimating a channel for each of the receiving antennas through interpolation of a symbol axis and a frequency axis employing the improved pilot channel estimation value, and a second channel estimation unit for estimating a channel for each of the receiving antennas through interpolation of a symbol axis and a frequency axis employing pilot channel estimation values of pilots transmitted from the same transmitting antenna, of pilots transmitted from a transmitting antenna that does not transmit the preamble, of a plurality of transmitting antennas.
摘要翻译：本发明的信道估计装置包括：前导信道操作单元，用于对从发送前导码的发送天线发送的导频信道估计值进行操作，作为改进的导频信道估计值，使用前导码基于由多个接收天线分别接收的接收信号中包括的前导码的信道估计值，第一信道估计单元，用于通过符号轴的插值来估计每个接收天线的信道，以及采用改进的导频信道的频率轴估计值，以及第二信道估计单元，用于通过内插符号轴和频率轴来估计每个接收天线的信道，该频率轴采用从相同发射天线发射的导频的导频信道估计值，从发射天线发射的导频这不传送前多个发射天线。

4. 发明授权

US08861633B2 Apparatus and method for estimating channel in OFDM/OFDMA based wireless communication system 有权
标题翻译：基于OFDM / OFDMA的无线通信系统估计信道的装置和方法
公开(公告)号：US08861633B2
公开(公告)日：2014-10-14
申请号：US13593120
申请日：2012-08-23
申请人： Byung-Chul Kim , Zheng Zi Li , Sang-Bae Ji
发明人： Byung-Chul Kim , Zheng Zi Li , Sang-Bae Ji
IPC分类号： H04B7/02 , H04L1/02 , H04L5/00 , H04L25/02 , H04L27/26
CPC分类号： H04L25/0204 , H04L5/0042 , H04L5/0048 , H04L25/022 , H04L25/0232 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L27/2675
摘要： A method for transmitting pilots in a wireless communication system includes generating first two pilots for a first antenna. Second two pilots for a second antenna are generated by multiplying the first two pilots with two weight values respectively. The first two pilots are transmitted over two Orthogonal Frequency Division Multiplexing (OFDM) symbols via the first antenna. The second two pilots are transmitted over the two OFDM symbols via the second antenna, wherein each weight value is determined based on a value used to obtain a symbol index of a corresponding OFDM symbol of the two OFDM symbols within a slot. Symbol indexes for the two OFDM symbols are consecutive, and the two weight values are different with each other.
摘要翻译：一种用于在无线通信系统中发送导频的方法包括为第一天线产生前两个导频。通过将前两个飞行员分别乘以两个加权值来生成第二个天线的第二个两个导频。前两个导频经由第一天线通过两个正交频分复用（OFDM）符号传输。第二个两个导频经由第二天线在两个OFDM符号上传输，其中每个权重值基于用于获得时隙内的两个OFDM符号的对应OFDM符号的符号索引的值来确定。两个OFDM符号的符号索引是连续的，并且两个权重值彼此不同。

5. 发明申请

US20100008216A1 APPARATUS AND METHOD FOR ESTIMATING AND COMPENSATING TIME OFFSET AND/OR CARRIER FREQUENCY OFFSET IN MIMO SYSTEM BASED OFDM/OFDMA 有权
标题翻译：用于在基于MIMO系统的OFDM / OFDMA中估计和补偿时间偏移和/或载波频率偏移的装置和方法
公开(公告)号：US20100008216A1
公开(公告)日：2010-01-14
申请号：US12439514
申请日：2007-08-30
申请人： Zheng Zi Li , Byung-Chul Kim , Sang-Bae Ji
发明人： Zheng Zi Li , Byung-Chul Kim , Sang-Bae Ji
IPC分类号： H04L7/00 , H04L27/28 , H04B7/208 , H04J11/00
CPC分类号： H04L27/2657 , H04B7/04 , H04L5/0023 , H04L5/0048 , H04L27/2662 , H04L27/2675 , H04L2027/003 , H04L2027/0095
摘要： The present invention relates to an apparatus and method for estimating and compensating for a time offset and a carrier frequency offset in a Multiple Input Multiple Output (MIMO) communication system that supports Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiplexing Access (OFDMA). According to the present invention, a phase difference of pilot signals of the same transmitting antenna, which are received through receiving antennas, is calculated. An arc tangent operation is then carried out on the phase difference of the pilot signals to calculate a time offset linear phase and/or a carrier frequency offset linear phase. Further, a time offset compensation value and/or a carrier frequency offset compensation value are found by employing the time offset linear phase and/or the carrier frequency offset linear phase. A time offset and/or a carrier frequency offset with respect to pilots and data are compensated for by employing the time offset compensation value and/or the carrier frequency offset compensation value.
摘要翻译：本发明涉及一种用于在支持正交频分复用（OFDM）或正交频分复用接入（OFDMA）的多输入多输出（MIMO）通信系统中估计和补偿时间偏移和载波频率偏移的装置和方法）。根据本发明，计算通过接收天线接收的相同发射天线的导频信号的相位差。然后对导频信号的相位差执行反正切运算，以计算时间偏移线性相位和/或载波频率偏移线性相位。此外，通过采用时间偏移线性相位和/或载波频率偏移线性相位来找到时间偏移补偿值和/或载波频率偏移补偿值。相对于导频和数据的时间偏移和/或载波频率偏移通过采用时间偏移补偿值和/或载波频率偏移补偿值来补偿。

6. 发明授权

US08588315B2 Decoding apparatus and decoding method 有权
标题翻译：解码装置和解码方法
公开(公告)号：US08588315B2
公开(公告)日：2013-11-19
申请号：US12162688
申请日：2007-02-21
申请人： Zheng Zi Li , Yong Suk Hwang , Jae Hyeong Kim , Sang Bae Ji
发明人： Zheng Zi Li , Yong Suk Hwang , Jae Hyeong Kim , Sang Bae Ji
IPC分类号： H04L27/28
CPC分类号： H04L27/2647 , H04L25/067
摘要： Provided are a decoding apparatus, a decoding method and a receiving apparatus for decoding in a system supporting an OFDM/OFDMA scheme. The decoding method includes the steps of: receiving phase-modulated signal; performing subcarrier demodulation on the received signal and generating correlation metrics; generating decoding metrics using the correlation metrics; and determining a payload using the largest metric of the decoding metrics and at least one of an average metric and the second largest metric of the decoding metrics. The decoding apparatus includes: a receiving buffer for buffering received phase-modulated signal; a likelihood metric generator for generating decoding metrics corresponding to likelihoods of the received signal buffered in the receiving buffer being determined as respective potential payload values; a mean calculator for calculating an average metric; and a payload determiner for determining a payload using the largest metric of the decoding metrics and at least one of an average metric and the second largest metric of the decoding metrics.
摘要翻译：提供一种在支持OFDM / OFDMA方案的系统中进行解码的解码装置，解码方法和接收装置。解码方法包括以下步骤：接收相位调制信号; 对接收到的信号执行子载波解调并产生相关度量; 使用所述相关度量来生成解码度量; 以及使用所述解码度量的最大度量以及所述解码度量的平均度量和所述第二最大度量中的至少一个来确定有效载荷。解码装置包括：接收缓冲器，用于缓冲接收到的相位调制信号; 用于产生与在接收缓冲器中缓冲的接收信号的似然性相对应的解码度量的似然度量发生器被确定为相应的潜在有效载荷值; 用于计算平均度量的平均计算器; 以及有效载荷确定器，用于使用解码度量的最大度量以及解码度量的平均度量和第二最大度量中的至少一个来确定有效载荷。

7. 发明申请

US20090010348A1 Decoding Apparatus and Decoding Method 有权
标题翻译：解码装置和解码方法
公开(公告)号：US20090010348A1
公开(公告)日：2009-01-08
申请号：US12162688
申请日：2007-02-21
申请人： Zheng Zi Li , Yong Suk Hwang , Jae Hyeong Kim , Sang Bae Ji
发明人： Zheng Zi Li , Yong Suk Hwang , Jae Hyeong Kim , Sang Bae Ji
IPC分类号： H04L27/28
CPC分类号： H04L27/2647 , H04L25/067
摘要： Provided are a decoding apparatus, a decoding method and a receiving apparatus for decoding in a system supporting an OFDM/OFDMA scheme. The decoding method includes the steps of: receiving phase-modulated signal; performing subcarrier demodulation on the received signal and generating correlation metrics; generating decoding metrics using the correlation metrics; and determining a payload using the largest metric of the decoding metrics and at least one of an average metric and the second largest metric of the decoding metrics. The decoding apparatus includes: a receiving buffer for buffering received phase-modulated signal; a likelihood metric generator for generating decoding metrics corresponding to likelihoods of the received signal buffered in the receiving buffer being determined as respective potential payload values; a mean calculator for calculating an average metric; and a payload determiner for determining a payload using the largest metric of the decoding metrics and at least one of an average metric and the second largest metric of the decoding metrics.
摘要翻译：提供一种在支持OFDM / OFDMA方案的系统中进行解码的解码装置，解码方法和接收装置。解码方法包括以下步骤：接收相位调制信号; 对接收到的信号执行子载波解调并产生相关度量; 使用所述相关度量来生成解码度量; 以及使用所述解码度量的最大度量以及所述解码度量的平均度量和所述第二最大度量中的至少一个来确定有效载荷。解码装置包括：接收缓冲器，用于缓冲接收到的相位调制信号; 用于产生与在接收缓冲器中缓冲的接收信号的似然性相对应的解码度量的似然度量发生器被确定为相应的潜在有效载荷值; 用于计算平均度量的平均计算器; 以及有效载荷确定器，用于使用解码度量的最大度量以及解码度量的平均度量和第二最大度量中的至少一个来确定有效载荷。

8. 发明授权

US08644363B2 Apparatus and method for estimating channel in MIMO system based OFDM/OFDMA 有权
标题翻译：基于OFDM / OFDMA的MIMO系统估计信道的装置和方法
公开(公告)号：US08644363B2
公开(公告)日：2014-02-04
申请号：US12521777
申请日：2007-12-31
申请人： Zheng Zi Li , Byung-Chul Kim
发明人： Zheng Zi Li , Byung-Chul Kim
IPC分类号： H04L1/00
CPC分类号： H04L25/0224 , H04L25/0204 , H04L27/2657 , H04L27/2662 , H04L27/2675 , H04L2025/03426
摘要： The present invention relates to an apparatus and method for estimating a channel in a MIMO wireless telecommunication system supporting the 0FDM/0FDMA. The present invention, in estimating a channel by using two or more pilots included in at least one received signal among received signals of a first channel and a second channel received through a first receiving antenna and received signals of a third channel and a fourth channel received through a second receiving antenna, determines a subchannel mapping rule respectively for the received signals of the first channel to the fourth channel, and estimates a channel with a different method according to the determined subchannel mapping rule. That is, the channel is estimated by using two or more pilots included in two or more tiles corresponding to the same subcarrier respectively, in case a subchannel rotation does not exist in the subchannel mapping rule, while the channel is estimated by using two pilots included in an individual tile, in case a subchannel rotation exists in the subchannel mapping rule.
摘要翻译：本发明涉及一种用于估计支持OFDM / 0FDMA的MIMO无线电信系统中的信道的装置和方法。本发明在通过使用包括在第一信道的接收信号中的至少一个接收信号中包含的两个或更多个导频来估计信道和通过第一接收天线接收到的第二信道和接收到的第三信道和第四信道的接收信号通过第二接收天线，分别确定第一信道到第四信道的接收信号的子信道映射规则，并且根据确定的子信道映射规则来估计具有不同方法的信道。也就是说，在子信道映射规则中不存在子信道旋转的情况下，通过使用分别对应于相同子载波的两个或更多瓦片中包括的两个或更多个导频来估计信道，同时通过使用包括的两个导频来估计信道在子通道映射规则中存在子通道旋转的情况下，在单独的瓦片中。

9. 发明申请

US20100085866A1 APPARATUS AND METHOD FOR ESTIMATING CHANNEL IN MIMO SYSTEM BASED OFDM/OFDMA 有权
标题翻译：基于MIMO系统的OFDM / OFDMA估计信道的装置和方法
公开(公告)号：US20100085866A1
公开(公告)日：2010-04-08
申请号：US12521777
申请日：2007-12-31
申请人： Zheng Zi Li , Byung-Chul Kim
发明人： Zheng Zi Li , Byung-Chul Kim
IPC分类号： H04B7/208 , H04J11/00 , H04L27/28
CPC分类号： H04L25/0224 , H04L25/0204 , H04L27/2657 , H04L27/2662 , H04L27/2675 , H04L2025/03426
摘要： The present invention relates to an apparatus and method for estimating a channel in a MIMO wireless telecommunication system supporting the 0FDM/0FDMA. The present invention, in estimating a channel by using two or more pilots included in at least one received signal among received signals of a first channel and a second channel received through a first receiving antenna and received signals of a third channel and a fourth channel received through a second receiving antenna, determines a subchannel mapping rule respectively for the received signals of the first channel to the fourth channel, and estimates a channel with a different method according to the determined subchannel mapping rule. That is, the channel is estimated by using two or more pilots included in two or more tiles corresponding to the same subcarrier respectively, in case a subchannel rotation does not exist in the subchannel mapping rule, while the channel is estimated by using two pilots included in an individual tile, in case a subchannel rotation exists in the subchannel mapping rule.
摘要翻译：本发明涉及一种用于估计支持OFDM / 0FDMA的MIMO无线电信系统中的信道的装置和方法。本发明在通过使用包括在第一信道的接收信号中的至少一个接收信号中包含的两个或更多个导频来估计信道和通过第一接收天线接收的第二信道和接收到的第三信道和第四信道的接收信号通过第二接收天线，分别确定第一信道到第四信道的接收信号的子信道映射规则，并且根据确定的子信道映射规则来估计具有不同方法的信道。也就是说，在子信道映射规则中不存在子信道旋转的情况下，通过使用分别对应于相同子载波的两个或更多瓦片中包括的两个或更多个导频来估计信道，同时通过使用包括的两个导频来估计信道在子通道映射规则中存在子通道旋转的情况下，在单独的瓦片中。

10. 发明申请

US20090052596A1 DECODER AND DECODING METHOD 审中-公开
标题翻译：解码和解码方法
公开(公告)号：US20090052596A1
公开(公告)日：2009-02-26
申请号：US12162672
申请日：2007-02-21
申请人： Zheng Zi Li , Yong Suk Hwang , Jae Hyeong Kim
发明人： Zheng Zi Li , Yong Suk Hwang , Jae Hyeong Kim
IPC分类号： H04L27/26
CPC分类号： H04L1/20 , H04L1/1607 , H04L27/2647
摘要： Provided are a decoding apparatus and method for a system supporting an Orthogonal Frequency Division Multiplexing (OFDM)/Orthogonal Frequency Division Multiple Access (OFDMA) scheme, the apparatus and method capable of simply performing decoding by a non-coherent method. The decoding method includes the steps or receiving quadrature phase shift keying (QPSK) modulated signal; performing subcarrier demodulation whereby correlation metrics are generated on the basis of the received signal; and performing decoding using a decoding metric derived from the correlation metrics. The correlation metrics are obtained by multiplying tile, bin or zone of received signal by sets of basis vectors. The decoding apparatus includes: a receiving buffer for buffering received QPSK modulated signal; a correlation metric generator for generating correlation metrics on the basis of the received signal buffered in the receiving buffer; and a decoding processor for performing decoding using a decoding metric derived from the correlation metrics.
摘要翻译：提供了一种用于支持正交频分复用（OFDM）/正交频分多址（OFDMA）方案的系统的解码装置和方法，该装置和方法能够简单地通过非相干方法执行解码。解码方法包括步骤或接收正交相移键控（QPSK）调制信号; 执行子载波解调，由此基于接收信号生成相关度量; 以及使用从所述相关度量导出的解码度量来执行解码。通过将接收信号的瓦片，箱或区域乘以基本矢量的集合来获得相关度量。解码装置包括：缓冲接收的QPSK调制信号的接收缓冲器; 相关度量产生器，用于基于在接收缓冲器中缓冲的接收信号产生相关度量; 以及解码处理器，用于使用从相关度量导出的解码度量来执行解码。

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