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1. 发明申请

US20090238291A1 COMMUNICATION APPARATUS, METHOD, AND TANGIBLE MACHINE-READABLE MEDIUM THEREOF FOR PROCESSING RANGING INTERFERENCE OF AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SIGNAL 有权
标题翻译：通信设备，方法和可变的机器可读介质，用于处理正交频分多路复用信号的范围干扰
公开(公告)号：US20090238291A1
公开(公告)日：2009-09-24
申请号：US12165080
申请日：2008-06-30
申请人： Kun-Chien Hung , David W. Lin , Youn-Tai Lee , Yi-Ting Lin
发明人： Kun-Chien Hung , David W. Lin , Youn-Tai Lee , Yi-Ting Lin
IPC分类号： H04L27/28
CPC分类号： H04L27/2647 , H04W56/0005
摘要： A communication apparatus, a method, and a tangible machine-readable medium thereof for processing ranging interference of an orthogonal frequency division multiplexing (OFDM) signal. The communication apparatus comprises a receiving unit, a processing unit, and a mask generating unit. The receiving unit receives the OFDM signal having a plurality of OFDM symbols. The processing unit estimates a delay value and an energy value of at least one ranging code according to the OFDM symbols. The mask generating unit generates a mask function according to the delay value and the energy value. Finally, the processing unit synthesizes the ranging interference in the OFDM signal and removes it according to the mask function.
摘要翻译：一种用于处理正交频分复用（OFDM）信号的测距干扰的通信装置，方法和有形机器可读介质。通信装置包括接收单元，处理单元和掩模生成单元。接收单元接收具有多个OFDM符号的OFDM信号。处理单元根据OFDM符号估计至少一个测距码的延迟值和能量值。掩模生成单元根据延迟值和能量值生成掩模功能。最后，处理单元合成OFDM信号中的测距干扰，并根据掩码函数去除它。

2. 发明申请

US20110158348A1 Dynamic tone grouping and encoding for multi-carrier quadrature amplitude modulation in OFDM 有权
标题翻译： OFDM中多载波正交幅度调制的动态音调分组和编码
公开(公告)号：US20110158348A1
公开(公告)日：2011-06-30
申请号：US12930111
申请日：2010-12-27
申请人： Vishakan Ponnampalam , Kun-Chien Hung
发明人： Vishakan Ponnampalam , Kun-Chien Hung
IPC分类号： H04L27/36 , H04L27/00
CPC分类号： H04L27/2627 , H04L1/0041
摘要： A method of dynamic tone grouping (DTG) used by a transmitter in a wireless OFDM system is proposed. First, a sequence of coded and interleaved bits is de-multiplexed into a number of bit-streams. Each bit-stream is mapped into a sequence of QAM symbols, which are grouped into non-overlapping sets of QAM symbols. Unitary transformation is then applied on the QAM symbols to produce groups of complex signals. Finally, the complex signals are dynamically mapped to subcarrier groups based on tone mapping information to improve link performance. The tone mapping information is derived from information associated with each OFDM subcarrier, such as channel state information (CSI). The OFDM subcarriers are grouped into subcarrier groups according to the tone mapping information such that the channel quality of each subcarrier group is balanced. In addition, the tone mapping information is efficiently encoded and transmitted to/from a corresponding receiver.
摘要翻译：提出了一种在无线OFDM系统中由发射机使用的动态音调分组（DTG）的方法。首先，编码和交织比特的序列被解复用到多个比特流中。每个比特流被映射成QAM符号序列，其被分组成不重叠的QAM符号集合。然后将单位变换应用于QAM符号以产生复杂信号组。最后，基于色调映射信息将复信号动态映射到子载波组，以提高链路性能。音调映射信息是从与每个OFDM子载波相关联的信息导出的，诸如信道状态信息（CSI）。 OFDM子载波根据色调映射信息被分组成子载波组，使得每个子载波组的信道质量平衡。此外，色调映射信息被有效地编码并发送到对应的接收器。

3. 发明授权

US08300713B2 Preamble sequence detection and integral carrier frequency offset estimation method for OFDM/OFDMA wireless communication system 有权
标题翻译： OFDM / OFDMA无线通信系统的前导序列检测和积分载波频偏估计方法
公开(公告)号：US08300713B2
公开(公告)日：2012-10-30
申请号：US12078616
申请日：2008-04-02
申请人： Kun-Chien Hung , David W. Lin
发明人： Kun-Chien Hung , David W. Lin
IPC分类号： H04K1/10
CPC分类号： H04L5/0007 , H04L27/0014 , H04L27/2659 , H04L27/2672 , H04L27/2675 , H04L27/2684
摘要： A preamble sequence detection and integral carrier frequency offset estimation method for OFDM/OFDMA wireless communication systems by formulating integral carrier frequency offset estimation and preamble sequence detection as a signal detection problem in multi-channel interference, obtaining the theoretically optimal solution, and deriving simplified, approximately optimal solutions, in which frequency-domain filtering is employed to calculate the required correlation values, which can drastically reduce the high computational complexity of the original theoretically optimal solution but result in little impact on precision. In addition, several further simplified algorithms are provided, some of which can even eliminate the use of multipliers. The using of frequency-domain filtering has high extensibility in application to related signal sequence detection problems.
摘要翻译：一种用于OFDM / OFDMA无线通信系统的前导码序列检测和整体载波频率偏移估计方法，通过将多载波频偏估计和前导序列检测作为多信道干扰的信号检测问题，获得理论上的最优解，近似最优解，其中采用频域滤波来计算所需的相关值，这可以显着降低原始理论上最优解的高计算复杂度，但对精度几乎没有影响。此外，还提供了几个进一步简化的算法，其中一些甚至可以消除乘法器的使用。使用频域滤波在应用于相关信号序列检测问题方面具有很高的可扩展性。

4. 发明授权

US08275079B2 Communication apparatus, method, and tangible machine-readable medium thereof for processing ranging interference of an orthogonal frequency division multiplexing signal 有权
标题翻译：通信装置，方法和有形的机器可读介质，用于处理正交频分复用信号的测距干扰
公开(公告)号：US08275079B2
公开(公告)日：2012-09-25
申请号：US12165080
申请日：2008-06-30
申请人： Kun-Chien Hung , David W. Lin , Youn-Tai Lee , Yi-Ting Lin
发明人： Kun-Chien Hung , David W. Lin , Youn-Tai Lee , Yi-Ting Lin
IPC分类号： H04B1/10
CPC分类号： H04L27/2647 , H04W56/0005
摘要： A communication apparatus, a method, and a tangible machine-readable medium thereof for processing ranging interference of an orthogonal frequency division multiplexing (OFDM) signal. The communication apparatus comprises a receiving unit, a processing unit, and a mask generating unit. The receiving unit receives the OFDM signal having a plurality of OFDM symbols. The processing unit estimates a delay value and an energy value of at least one ranging code according to the OFDM symbols. The mask generating unit generates a mask function according to the delay value and the energy value. Finally, the processing unit synthesizes the ranging interference in the OFDM signal and removes it according to the mask function.
摘要翻译：一种用于处理正交频分复用（OFDM）信号的测距干扰的通信装置，方法和有形机器可读介质。通信装置包括接收单元，处理单元和掩模生成单元。接收单元接收具有多个OFDM符号的OFDM信号。处理单元根据OFDM符号估计至少一个测距码的延迟值和能量值。掩模生成单元根据延迟值和能量值生成掩模功能。最后，处理单元合成OFDM信号中的测距干扰，并根据掩码函数去除它。

5. 发明授权

US08218658B2 Method for OFDM and OFDMA channel estimation 有权
标题翻译： OFDM和OFDMA信道估计方法
公开(公告)号：US08218658B2
公开(公告)日：2012-07-10
申请号：US12118063
申请日：2008-05-09
申请人： Kun-Chien Hung , David W. Lin
发明人： Kun-Chien Hung , David W. Lin
IPC分类号： H04L27/28
CPC分类号： H04L25/0232 , H04L5/0007 , H04L5/0048 , H04L25/022 , H04L25/0226 , H04L27/261 , H04L27/2647 , H04L27/2662
摘要： This invention discloses a method for OFDM and OFDMA channel estimation via phase-rotated polynomial interpolation and extrapolation (inter/extra-polation). For complexity reason, polynomial inter/extra-polation is an often considered method for channel estimation in orthogonal frequency-division multiplexing (OFDM) and orthogonal frequency-division multiple access (OFDMA) systems, in which the simplest choice is linear inter/extra-polation. But the performance of this method depends on the accuracy of symbol timing estimation as well as the channel delay spread. The invention mitigates the problem by adding a linear phase factor to polynomial inter/extra-polation, which corresponds to adding a delay (also called delay shift) in the time domain.
摘要翻译：本发明公开了一种通过相位旋转多项式插值和外推（inter / extra-polation）进行OFDM和OFDMA信道估计的方法。对于复杂性原因，多项式inter / extra-polation是在正交频分复用（OFDM）和正交频分多址（OFDMA）系统中经常考虑的信道估计方法，其中最简单的选择是线性互/ 政治化但是该方法的性能取决于符号定时估计的精度以及信道延迟扩展。本发明通过将线性相位因子添加到多项式inter / extra-polation来缓解问题，这对应于在时域中增加延迟（也称为延迟移位）。

6. 发明申请

US20090232230A1 METHOD FOR OFDM AND OFDMA CHANNEL ESTIMATION 有权
标题翻译： OFDM和OFDMA信道估计的方法
公开(公告)号：US20090232230A1
公开(公告)日：2009-09-17
申请号：US12118063
申请日：2008-05-09
申请人： Kun-Chien HUNG , David W. Lin
发明人： Kun-Chien HUNG , David W. Lin
IPC分类号： H04L27/28 , H04B7/208
CPC分类号： H04L25/0232 , H04L5/0007 , H04L5/0048 , H04L25/022 , H04L25/0226 , H04L27/261 , H04L27/2647 , H04L27/2662
摘要： This invention discloses a method for OFDM and OFDMA channel estimation via phase-rotated polynomial interpolation and extrapolation (inter/extra-polation). For complexity reason, polynomial inter/extra-polation is an often considered method for channel estimation in orthogonal frequency-division multiplexing (OFDM) and orthogonal frequency-division multiple access (OFDMA) systems, in which the simplest choice is linear inter/extra-polation. But the performance of this method depends on the accuracy of symbol timing estimation as well as the channel delay spread. The invention mitigates the problem by adding a linear phase factor to polynomial inter/extra-polation, which corresponds to adding a delay (also called delay shift) in the time domain.
摘要翻译：本发明公开了一种通过相位旋转多项式插值和外推（inter / extra-polation）进行OFDM和OFDMA信道估计的方法。对于复杂性原因，多项式inter / extra-polation是在正交频分复用（OFDM）和正交频分多址（OFDMA）系统中经常考虑的信道估计方法，其中最简单的选择是线性互/ 政治化但是该方法的性能取决于符号定时估计的精度以及信道延迟扩展。本发明通过将线性相位因子添加到多项式inter / extra-polation来缓解问题，这对应于在时域中增加延迟（也称为延迟移位）。

7. 发明申请

US20080144745A1 CHANNEL ESTIMATION DEVICE, METHOD, AND COMPUTER READABLE MEDIUM FOR ESTIMATING CHANNEL BY A PREVIOUS CHANNEL SIGNAL 审中-公开
标题翻译：用于通过以前的信道信号估计信道的信道估计设备，方法和计算机可读介质
公开(公告)号：US20080144745A1
公开(公告)日：2008-06-19
申请号：US11683523
申请日：2007-03-08
申请人： Kun-Chien Hung , David W. Lin , Jian-Pei Liu
发明人： Kun-Chien Hung , David W. Lin , Jian-Pei Liu
IPC分类号： H04L27/06
CPC分类号： H04L25/0224 , H04L27/261
摘要： A channel estimation device estimates channel by a previous signal, comprising an F evaluation module, a digitalization module, and a transferring module. The evaluation module processes a initial channel estimation according to at least one pilot signal of the previous signal. The digitalization module digitalizes a data carrier to a digital data signal according to the initial channel estimation. The transferring module transfers the digital data signal to at least one of specific references. The evaluation module receives a new data signal and modulates the new data signal according to the specific references.
摘要翻译：信道估计装置通过前一信号估计信道，包括F评估模块，数字化模块和传送模块。评估模块根据先前信号的至少一个导频信号处理初始信道估计。数字化模块根据初始信道估计将数据载体数字化为数字数据信号。转移模块将数字数据信号传送到具体参考中的至少一个。评估模块接收新的数据信号并根据具体参考调制新的数据信号。

8. 发明授权

US08391383B2 Dynamic tone grouping and encoding for multi-carrier quadrature amplitude in OFDM 有权
标题翻译： OFDM中的多载波正交幅度的动态音调分组和编码
公开(公告)号：US08391383B2
公开(公告)日：2013-03-05
申请号：US12930111
申请日：2010-12-27
申请人： Vishakan Ponnampalam , Kun-Chien Hung
发明人： Vishakan Ponnampalam , Kun-Chien Hung
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2627 , H04L1/0041
摘要： A method of dynamic tone grouping (DTG) used by a transmitter in a wireless OFDM system is proposed. First, a sequence of coded and interleaved bits is de-multiplexed into a number of bit-streams. Each bit-stream is mapped into a sequence of QAM symbols, which are grouped into non-overlapping sets of QAM symbols. Unitary transformation is then applied on the QAM symbols to produce groups of complex signals. Finally, the complex signals are dynamically mapped to subcarrier groups based on tone mapping information to improve link performance. The tone mapping information is derived from information associated with each OFDM subcarrier, such as channel state information (CSI). The OFDM subcarriers are grouped into subcarrier groups according to the tone mapping information such that the channel quality of each subcarrier group is balanced. In addition, the tone mapping information is efficiently encoded and transmitted to/from a corresponding receiver.
摘要翻译：提出了一种在无线OFDM系统中由发射机使用的动态音调分组（DTG）的方法。首先，编码和交织比特的序列被解复用到多个比特流中。每个比特流被映射成QAM符号序列，其被分组成不重叠的QAM符号集合。然后将单位变换应用于QAM符号以产生复杂信号组。最后，基于色调映射信息将复信号动态映射到子载波组，以提高链路性能。音调映射信息是从与每个OFDM子载波相关联的信息导出的，诸如信道状态信息（CSI）。 OFDM子载波根据色调映射信息被分组成子载波组，使得每个子载波组的信道质量平衡。此外，色调映射信息被有效地编码并发送到对应的接收器。

9. 发明授权

US08139666B2 Channel estimation technique for multi-carrier system 有权
标题翻译：多载波系统的信道估计技术
公开(公告)号：US08139666B2
公开(公告)日：2012-03-20
申请号：US12576866
申请日：2009-10-09
申请人： Kun-Chien Hung , David W. Lin
发明人： Kun-Chien Hung , David W. Lin
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L25/0232 , H04B17/364 , H04L25/0212 , H04L25/022
摘要： The present invention relates to a channel estimation technique for multi-carrier system which uses pilot signal to first obtain pilot subcarrier channel responses, then estimate the mean delay and the root-mean-square delay spread of the channel, and then uses interpolation to obtain the channel responses of arbitrary subcarriers. The present invention is able to perform channel estimation and to accurately estimate various channel delay parameters (such as the initial delay, the mean delay, and the root-mean-square delay spread) with very low quantity of pilot signal and with low computational complexity. In addition, the present invention has broad applicability, as it does not require the channel power-delay profile to be of certain specific types and it can operate in systems where pilot subcarriers have an irregular configuration.
摘要翻译：本发明涉及使用导频信号首先获得导频子载波信道响应的多载波系统的信道估计技术，然后估计信道的平均延迟和均方根延迟扩展，然后使用内插获得任意子载波的信道响应。本发明能够以非常低的导频信号量和低计算复杂度来执行信道估计并且准确地估计各种信道延迟参数（诸如初始延迟，平均延迟和均方根延迟扩展）。此外，本发明具有广泛的适用性，因为它不需要信道功率延迟分布具有某些特定类型，并且其可以在导频子载波具有不规则配置的系统中操作。

10. 发明申请

US20100260248A1 CHANNEL ESTIMATION TECHNIQUE FOR MULTI-CARRIER SYSTEM 有权
标题翻译：多载波系统的信道估计技术
公开(公告)号：US20100260248A1
公开(公告)日：2010-10-14
申请号：US12576866
申请日：2009-10-09
申请人： Kun-Chien Hung , David W. Lin
发明人： Kun-Chien Hung , David W. Lin
IPC分类号： H04B17/00 , H04L27/28
CPC分类号： H04L25/0232 , H04B17/364 , H04L25/0212 , H04L25/022
摘要： The present invention relates to a channel estimation technique for multi-carrier system which uses pilot signal to first obtain pilot subcarrier channel responses, then estimate the mean delay and the root-mean-square delay spread of the channel, and then uses interpolation to obtain the channel responses of arbitrary subcarriers. The present invention is able to perform channel estimation and to accurately estimate various channel delay parameters (such as the initial delay, the mean delay, and the root-mean-square delay spread) with very low quantity of pilot signal and with low computational complexity. In addition, the present invention has broad applicability, as it does not require the channel power-delay profile to be of certain specific types and it can operate in systems where pilot subcarriers have an irregular configuration.
摘要翻译：本发明涉及使用导频信号首先获得导频子载波信道响应的多载波系统的信道估计技术，然后估计信道的平均延迟和均方根延迟扩展，然后使用内插获得任意子载波的信道响应。本发明能够以非常低的导频信号量和低计算复杂度来执行信道估计并且准确地估计各种信道延迟参数（诸如初始延迟，平均延迟和均方根延迟扩展）。此外，本发明具有广泛的适用性，因为它不需要信道功率延迟分布具有某些特定类型，并且其可以在导频子载波具有不规则配置的系统中操作。

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