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1. 发明申请

WO2009114374A2 I/Q IMBALANCE ESTIMATION USING SYNCHRONIZATION SIGNALS IN LTE SYSTEMS 审中-公开
标题翻译： I / Q在LTE系统中使用同步信号的不平等估计
公开(公告)号：WO2009114374A2
公开(公告)日：2009-09-17
申请号：PCT/US2009/036125
申请日：2009-03-05
申请人： INTERDIGITAL PATENT HOLDINGS, INC. , HAGHIGHAT, Afshin , NAYEB NAZAR, Shahrokh , CHANG, Jiang , LU, I-tai , KOO, Chang-Soo
发明人： HAGHIGHAT, Afshin , NAYEB NAZAR, Shahrokh , CHANG, Jiang , LU, I-tai , KOO, Chang-Soo
IPC分类号： H04L27/00 , H04J11/00
CPC分类号： H04L27/2647 , H04J11/0069 , H04L25/022 , H04L25/0228 , H04L2027/0016 , H04L2027/0024
摘要： A method and apparatus perform I/Q imbalance estimation and compensation using synchronization signals in LTE systems. Primary and secondary synchronization signals (P-SCH and S-SCH), which carry synchronization information, are embedded in each LTE frame, and are used for receiver I/Q imbalance estimation. Additionally, the performance may be significantly improved by optimally selecting the training data in I/Q imbalance estimation.
摘要翻译：一种方法和装置使用LTE系统中的同步信号来执行I / Q不平衡估计和补偿。携带同步信息的主同步信号（P-SCH和S-SCH）嵌入在每个LTE帧中，并用于接收机I / Q不平衡估计。另外，通过最佳地选择I / Q不平衡估计中的训练数据可以显着提高性能。

2. 发明申请

WO2009114391A1 PARTIAL CHANNEL PRECODING AND SUCCESSIVE INTERFERENCE CANCELLATION FOR MULTI-INPUT MULTI-OUTPUT ORTHOGONAL FREQUENCY DIVISION MODULATION (MIMO-OFDM) SYSTEMS 审中-公开
标题翻译：多输入多输出正交分频调制（MIMO-OFDM）系统的部分信道预测和连续干扰消除
公开(公告)号：WO2009114391A1
公开(公告)日：2009-09-17
申请号：PCT/US2009/036216
申请日：2009-03-05
申请人： INTERDIGITAL PATENT HOLDINGS, INC. , TSAI, KunJu , LU, I-Tai , KOO, Chang-Soo , OLESEN, Robert, L.
发明人： TSAI, KunJu , LU, I-Tai , KOO, Chang-Soo , OLESEN, Robert, L.
IPC分类号： H04L25/03 , H04L1/06 , H04L1/00
CPC分类号： H04L1/0631 , H04L1/0061 , H04L1/0065 , H04L1/0066 , H04L1/0656 , H04L25/0248 , H04L25/03006 , H04L25/03343 , H04L2025/03414 , H04L2025/03426 , H04L2025/03605 , H04L2025/03802
摘要： Methods and apparatus are disclosed for improving the frame error rate performance of a multi-input multi-output orthogonal frequency division modulation (MIMO-OFDM) system with a limited-bandwidth feedback channel is disclosed. Successive interference cancellation (SIC) is used to improve MIMO-OFDM system performance gain with cyclic redundancy check (CRC) and convolutional codes (CC). Additional performance gains are obtained when MIMO channel state information (CSI) is available at the transmitting unit.
摘要翻译：公开了用于改善具有有限带宽反馈信道的多输入多输出正交频分调制（MIMO-OFDM）系统的帧差错率性能的方法和装置。连续干扰消除（SIC）用于通过循环冗余校验（CRC）和卷积码（CC）来改善MIMO-OFDM系统的性能增益。当MIMO信道状态信息（CSI）在发射单元可用时获得额外的性能增益。

3. 发明申请

WO2012125931A1 METHODS FOR PROVIDING PRECODING AND FEEDBACK AND BASE STATION 审中-公开
标题翻译：提供预测和反馈和基站的方法
公开(公告)号：WO2012125931A1
公开(公告)日：2012-09-20
申请号：PCT/US2012/029453
申请日：2012-03-16
申请人： INTERDIGITAL PATENT HOLDINGS, INC. , LI, Yingxue, K. , SHENG, Hongsan , ZHANG, Guodong , OLESEN, Robert, L. , LU, Enoch , LU, I-tai
发明人： LI, Yingxue, K. , SHENG, Hongsan , ZHANG, Guodong , OLESEN, Robert, L. , LU, Enoch , LU, I-tai
IPC分类号： H04B7/06
CPC分类号： H04B7/0626 , H04B7/0617 , H04B7/065
摘要： Beamforming, precoding, and feedback systems and methods are provided. For example, user equipment (UE) estimates an effective channel using a predetermined channel independent matrix or beamforming. Such an effective channel estimate along with other feedback information including a channel quality indicator (CQI) and a precoding matrix indicator (PMI) is fed back to an eNB. The eNB may precode data and may provide channel estimation at the eNB using a double codebook or double precoder. For example, the eNB may precode data based on the feedback information (e.g. using a channel dependent precoder) and the eNB may precode the data based on the channel independent matrix (e.g. using a channel independent precoder) that may be channel independent and/or preset (e.g. known to both eNB and UE), and may change each TTI. Such precoding along with scaling factors approximated from the PMI or CQI feedback may be used to enable the eNB to estimate a channel based covariance matrix and design the channel dependent precoder.
摘要翻译：提供波束形成，预编码和反馈系统和方法。例如，用户设备（UE）使用预定的信道无关矩阵或波束形成来估计有效信道。将这样的有效信道估计与包括信道质量指示符（CQI）和预编码矩阵指示符（PMI）的其他反馈信息一起反馈给eNB。 eNB可以预编码数据，并且可以使用双码本或双重预编码器在eNB处提供信道估计。例如，eNB可以基于反馈信息（例如，使用信道相关预编码器）对数据进行预编码，并且eNB可以基于与信道无关的矩阵（例如，使用信道独立的预编码器）对数据进行预编码，该矩阵可以是信道独立的和/或预置（例如，已知的eNB和UE），并且可以改变每个TTI。这样的预编码以及从PMI或CQI反馈近似的缩放因子可以用于使得eNB能够估计基于信道的协方差矩阵并设计信道相关预编码器。

4. 发明申请

WO2007081977A3 METHOD AND APPARATUS FOR IMPLEMENTING SPACE TIME PROCESSING WITH UNEQUAL MODULATION AND CODING SCHEMES 审中-公开
标题翻译：用不平等调制和编码方案实现空间时间处理的方法和装置
公开(公告)号：WO2007081977A3
公开(公告)日：2008-02-14
申请号：PCT/US2007000579
申请日：2007-01-10
申请人： INTERDIGITAL TECH CORP , OLESEN ROBERT L , ZEIRA ELDAD M , VOLTZ PETER J , YANG YONGWEN , DAI QINGYUAN , KOO CHANG-SOO , LU I-TAI , TSAI KUNJUN
发明人： OLESEN ROBERT L , ZEIRA ELDAD M , VOLTZ PETER J , YANG YONGWEN , DAI QINGYUAN , KOO CHANG-SOO , LU I-TAI , TSAI KUNJUN
IPC分类号： H04L1/00 , H04B7/06 , H04L1/06
CPC分类号： H04L1/0643 , H04B7/0456 , H04B7/0619 , H04B7/0626 , H04B7/0669 , H04B7/0697 , H04B7/0837 , H04B7/0891 , H04B17/336 , H04L1/0003 , H04L1/0009 , H04L1/0606 , H04L1/0625 , H04L1/0631 , H04L27/2626 , H04L27/2647 , H04W84/12
摘要： A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream.
摘要翻译：公开了一种用于实现具有不等调制和编码方案（MCS）或流依赖MCS的空间处理的方法和装置。输入数据可以被解析成多个数据流，并且对数据流执行空间处理以产生多个空间流。独立地选择每个数据流的MCS。空间流通过多个发射天线发射。可以对空间时间块编码（STBC），空间频率块编码（SFBC），准正交Alamouti编码，时间反转空间时间块编码，线性空间处理和循环延迟分集（CDD）的技术中的至少一种进行数据/空间流。然后可以将天线映射矩阵应用于空间流。空间流通过多个发射天线发射。可以基于与数据流相关联的每个空间流的信噪比来确定每个数据流的MCS。

5. 发明申请

WO2007103183A3 METHOD AND APPARATUS FOR CHANNEL ESTIMATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 审中-公开
标题翻译：正交频分复用系统中信道估计的方法和装置
公开(公告)号：WO2007103183A3
公开(公告)日：2007-11-15
申请号：PCT/US2007005374
申请日：2007-02-28
申请人： INTERDIGITAL TECH CORP , KOO CHANG-SOO , ZEIRA ELDAD , LU I-TAI , OLESEN ROBERT LIND , TSAI KUNJU
发明人： KOO CHANG-SOO , ZEIRA ELDAD , LU I-TAI , OLESEN ROBERT LIND , TSAI KUNJU
IPC分类号： H04L25/02
CPC分类号： H04L25/0216 , H04L25/0208 , H04L25/0212 , H04L25/0214 , H04L25/022 , H04L25/0232 , H04L27/2647
摘要： In an orthogonal frequency division multiplexing (OFDM) system, a frequency domain channel estimate for non-nullified subcarriers is converted to a time domain channel estimate. The number of taps L of a channel model is determined based on the time domain channel estimate. An improved time domain channel estimate is obtained by computing L tap coefficients of the channel model from the frequency domain channel estimate. An improved frequency domain channel estimate is obtained by performing a Fourier transform on the improved time domain channel estimate. Alternatively, a time domain truncation method may be performed selectively only if the signal-to-noise ratio (SNR) is below a threshold. Alternatively, a frequency domain channel estimate for pilot subcarriers are converted to a time domain channel estimate and an improved frequency domain channel estimate is obtained based on the number of pilot subcarriers and a delay spread.
摘要翻译：在正交频分复用（OFDM）系统中，用于非无效副载波的频域信道估计被转换为时域信道估计。基于时域信道估计来确定信道模型的抽头数量L. 通过根据频域信道估计来计算信道模型的L个抽头系数来获得改进的时域信道估计。通过对改进的时域信道估计执行傅里叶变换来获得改进的频域信道估计。或者，只有当信噪比（SNR）低于阈值时才可以选择性地执行时域截断方法。或者，导频子载波的频域信道估计被转换为时域信道估计，并且基于导频子载波的数量和延迟扩展来获得改进的频域信道估计。

6. 发明申请

WO2007103099A1 METHOD AND APPARATUS FOR CORRECTING SAMPLE CLOCK FREQUENCY OFFSET IN OFDM MIMO SYSTEMS 审中-公开
标题翻译：用于校正OFDM MIMO系统中的时钟频率偏移的方法和装置
公开(公告)号：WO2007103099A1
公开(公告)日：2007-09-13
申请号：PCT/US2007/005247
申请日：2007-03-02
申请人： INTERDIGITAL TECHNOLOGY CORPORATION , VOLTZ, Peter, J. , OLESEN, Robert, L. , LU, I-Tai , KOO, Chang-Soo , DAI, Qingyuan , YANG, Yongwen , TENG, Hui-Yuan
发明人： VOLTZ, Peter, J. , OLESEN, Robert, L. , LU, I-Tai , KOO, Chang-Soo , DAI, Qingyuan , YANG, Yongwen , TENG, Hui-Yuan
IPC分类号： H04L27/26
CPC分类号： H04L27/2662 , H04L5/0023 , H04L25/0244 , H04L27/0014 , H04L27/266 , H04L27/2672
摘要： In an orthogonal frequency division multiplexed (OFDM) multiple-in multiple-out (MIMO) wireless communication system, a method for correcting sampler clock frequency offset in a receiver comprises acquiring the frequency offset and symbol timing in a received signal by the receiver. The estimated value of a fractional offset is computed, and a correction in the frequency domain based upon the estimated value of the fractional offset is performed.
摘要翻译：在正交频分多路复用（OFDM）多输入多输出（MIMO）无线通信系统中，用于在接收机中校正采样器时钟频率偏移的方法包括：由接收机获取接收信号中的频率偏移和符号定时。计算分数偏移的估计值，并且基于分数偏移的估计值执行频域中的校正。

7. 发明申请

WO2007081977A2 METHOD AND APPARATUS FOR IMPLEMENTING SPACE TIME PROCESSING WITH UNEQUAL MODULATION AND CODING SCHEMES 审中-公开
标题翻译：用不平等调制和编码方案实现空间时间处理的方法和装置
公开(公告)号：WO2007081977A2
公开(公告)日：2007-07-19
申请号：PCT/US2007/000579
申请日：2007-01-10
申请人： INTERDIGITAL TECHNOLOGY CORPORATION , OLESEN, Robert, L. , ZEIRA, Eldad, M. , VOLTZ, Peter, J. , YANG, Yongwen , DAI, Qingyuan , KOO, Chang-Soo , LU, I-Tai , TSAI, KunJun
发明人： OLESEN, Robert, L. , ZEIRA, Eldad, M. , VOLTZ, Peter, J. , YANG, Yongwen , DAI, Qingyuan , KOO, Chang-Soo , LU, I-Tai , TSAI, KunJun
IPC分类号： H04L1/00 , H04L1/06 , H04B7/06
CPC分类号： H04L1/0643 , H04B7/0456 , H04B7/0619 , H04B7/0626 , H04B7/0669 , H04B7/0697 , H04B7/0837 , H04B7/0891 , H04B17/336 , H04L1/0003 , H04L1/0009 , H04L1/0606 , H04L1/0625 , H04L1/0631 , H04L27/2626 , H04L27/2647 , H04W84/12
摘要： A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream.
摘要翻译：公开了一种用于实现具有不等调制和编码方案（MCS）或流依赖MCS的空间处理的方法和装置。输入数据可以被解析成多个数据流，并且对数据流执行空间处理以产生多个空间流。独立地选择每个数据流的MCS。空间流通过多个发射天线发射。可以对空间时间块编码（STBC），空间频率块编码（SFBC），准正交Alamouti编码，时间反转空间时间块编码，线性空间处理和循环延迟分集（CDD）的技术中的至少一种进行数据/空间流。然后可以将天线映射矩阵应用于空间流。空间流通过多个发射天线发射。可以基于与数据流相关联的每个空间流的信噪比来确定每个数据流的MCS。

8. 发明申请

WO2007019171A3 METHOD AND APPARATUS FOR ESTIMATING SIGNAL-TO-NOISE RATIO, NOISE POWER, AND SIGNAL POWER 审中-公开
标题翻译：用于估计信号噪声比，噪声功率和信号功率的方法和装置
公开(公告)号：WO2007019171A3
公开(公告)日：2007-06-21
申请号：PCT/US2006030079
申请日：2006-08-02
申请人： INTERDIGITAL TECH CORP , KOO CHANG-SOO , LU I-TAI , DAI QINGYUAN , VOLTZ PETER J , OLESEN ROBERT LIND
发明人： KOO CHANG-SOO , LU I-TAI , DAI QINGYUAN , VOLTZ PETER J , OLESEN ROBERT LIND
IPC分类号： H04B17/00
CPC分类号： H04L27/2613 , H04B17/336
摘要： In a wireless communication system, a method and apparatus for noise estimation of a received OFDM communication signal, wherein the signal comprises a data frame with a preamble having at least one long training field (LTF) containing two identical OFDM symbols comprise examining the LTF for identical OFDM symbols. The noise power in the signal is estimated and the received signal power is measured. The signal to noise ratio is calculated and the signal power is determined by subtracting the noise power from the signal noise.
摘要翻译：在无线通信系统中，用于接收的OFDM通信信号的噪声估计的方法和装置，其中所述信号包括具有前导码的数据帧，所述前同步码具有至少一个包含两个相同的OFDM符号的长训练场（LTF），包括检查所述LTF用于相同的OFDM符号。估计信号中的噪声功率并测量接收信号功率。计算信噪比，通过从信号噪声中减去噪声功率来确定信号功率。

9. 发明申请

WO2007019171A2 METHOD AND APPARATUS FOR ESTIMATING SIGNAL-TO-NOISE RATIO, NOISE POWER, AND SIGNAL POWER 审中-公开
标题翻译：估计信号噪声比，噪声功率和信号功率的方法和设备
公开(公告)号：WO2007019171A2
公开(公告)日：2007-02-15
申请号：PCT/US2006/030079
申请日：2006-08-02
申请人： INTERDIGITAL TECHNOLOGY CORPORATION , KOO, Chang-Soo , LU, I-Tai , DAI, Qingyuan , VOLTZ, Peter, J. , OLESEN, Robert, Lind
发明人： KOO, Chang-Soo , LU, I-Tai , DAI, Qingyuan , VOLTZ, Peter, J. , OLESEN, Robert, Lind
IPC分类号： H04K1/10 , H04L1/02 , H04L27/08
CPC分类号： H04L27/2613 , H04B17/336
摘要： In a wireless communication system, a method and apparatus for noise estimation of a received OFDM communication signal, wherein the signal comprises a data frame with a preamble having at least one long training field (LTF) containing two identical OFDM symbols comprise examining the LTF for identical OFDM symbols. The noise power in the signal is estimated and the received signal power is measured. The signal to noise ratio is calculated and the signal power is determined by subtracting the noise power from the signal noise.
摘要翻译：在无线通信系统中，用于接收到的OFDM通信信号的噪声估计的方法和装置，其中该信号包括具有前导码的数据帧，该前导码具有至少一个包含两个长训练字段（LTF）的长训练字段相同的OFDM符号包括检查相同OFDM符号的LTF。估计信号中的噪声功率并测量接收信号功率。计算信噪比，通过从信号噪声中减去噪声功率来确定信号功率。

10. 发明申请

WO2009114374A3 I/Q IMBALANCE ESTIMATION USING SYNCHRONIZATION SIGNALS IN LTE SYSTEMS 审中-公开
标题翻译： I / Q在LTE系统中使用同步信号的不平等估计
公开(公告)号：WO2009114374A3
公开(公告)日：2010-02-25
申请号：PCT/US2009036125
申请日：2009-03-05
申请人： INTERDIGITAL PATENT HOLDINGS , HAGHIGHAT AFSHIN , NAYEB NAZAR SHAHROKH , CHANG JIANG , LU I-TAI , KOO CHANG-SOO
发明人： HAGHIGHAT AFSHIN , NAYEB NAZAR SHAHROKH , CHANG JIANG , LU I-TAI , KOO CHANG-SOO
IPC分类号： H04L27/26 , H04L25/02 , H04L27/00
CPC分类号： H04L27/2647 , H04J11/0069 , H04L25/022 , H04L25/0228 , H04L2027/0016 , H04L2027/0024
摘要： A method and apparatus perform I/Q imbalance estimation and compensation using synchronization signals in LTE systems. Primary and secondary synchronization signals (P-SCH and S-SCH), which carry synchronization information, are embedded in each LTE frame, and are used for receiver I/Q imbalance estimation. Additionally, the performance may be significantly improved by optimally selecting the training data in I/Q imbalance estimation.
摘要翻译：一种方法和装置使用LTE系统中的同步信号来执行I / Q不平衡估计和补偿。携带同步信息的主同步信号（P-SCH和S-SCH）嵌入在每个LTE帧中，并用于接收机I / Q不平衡估计。另外，通过最佳地选择I / Q不平衡估计中的训练数据可以显着提高性能。

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