专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明授权

US08132069B2 Selective HARQ combining scheme for OFDM/OFDMA systems 有权
标题翻译： OFDM / OFDMA系统的选择性HARQ组合方案
公开(公告)号：US08132069B2
公开(公告)日：2012-03-06
申请号：US11956168
申请日：2007-12-13
申请人： Jong Hyeon Park , Je Woo Kim , Sameer Nanavati , James Y. Hurt
发明人： Jong Hyeon Park , Je Woo Kim , Sameer Nanavati , James Y. Hurt
IPC分类号： G08C25/02 , G08C25/00
CPC分类号： H04L1/1845 , H04L1/1812 , H04L5/0007
摘要： A method and apparatus for combining retransmitted hybrid automatic repeat-request (HARQ) messages at different stages in an orthogonal frequency-division multiplexing (OFDM)/orthogonal frequency-division multiple access (OFDMA) receiver are provided. The type of HARQ combiner used for a particular channel may depend on a number of selection criteria including the modulation order of the transmission, the number of bits needed for the combined signals, and the headroom in the HARQ buffer. For some embodiments, a combination of different types of HARQ combiners may be designed into a receiver and selected on a per-channel basis. Proper selection of a HARQ combining scheme may reduce the required HARQ buffer size and may provide an increased combining gain when compared to conventional HARQ combining techniques.
摘要翻译：提供了一种用于在正交频分复用（OFDM）/正交频分多址（OFDMA）接收机中的不同阶段组合重传的混合自动重传请求（HARQ）消息的方法和装置。用于特定信道的HARQ组合器的类型可以取决于包括传输的调制阶数，组合信号所需的位数以及HARQ缓冲器中的余量的选择标准的数量。对于一些实施例，可以将不同类型的HARQ组合器的组合设计成接收机并且在每个信道的基础上进行选择。 HARQ组合方案的正确选择可以减少所需的HARQ缓冲器大小，并且与常规HARQ组合技术相比可以提供增加的组合增益。

32. 发明授权

US08532201B2 Methods and apparatus for identifying a preamble sequence and for estimating an integer carrier frequency offset 有权
标题翻译：用于识别前导码序列和估计整数载波频率偏移的方法和装置
公开(公告)号：US08532201B2
公开(公告)日：2013-09-10
申请号：US11955062
申请日：2007-12-12
申请人： Jong Hyeon Park , Ju Won Park , Je Woo Kim
发明人： Jong Hyeon Park , Ju Won Park , Je Woo Kim
IPC分类号： H04K1/10
CPC分类号： H04L27/2659
摘要： In accordance with a method for identifying a preamble sequence and for estimating an integer carrier frequency offset, a signal that comprises a preamble sequence from a set of possible preamble sequences is received. A reduced set of integer carrier frequency offset (CFO) candidates may be determined. Cross-correlation operations may be performed with respect to the received signal and multiple candidate transmitted signals. Each candidate transmitted signal may include one of the set of possible preamble sequences. In addition, each candidate transmitted signal may correspond to one of the reduced set of integer CFO candidates. Multiple correlation values may be determined as a result of the cross-correlation operations. The correlation values may be used to identify the preamble sequence and to estimate the integer CFO.
摘要翻译：根据用于识别前导码序列和估计整数载波频率偏移的方法，接收包括来自一组可能的前同步码序列的前置码序列的信号。可以确定减小的整数载波频率偏移（CFO）候选集。可以相对于接收信号和多个候选发送信号执行互相关运算。每个候选发送信号可以包括一组可能的前导码序列之一。此外，每个候选发送信号可以对应于缩减的整数CFO候选集之一。作为互相关运算的结果，可以确定多个相关值。相关值可用于识别前导序列并估计整数CFO。

33. 发明授权

US07835426B2 Apparatus and method for providing transmit diversity in multi-antenna wireless communication systems 有权
标题翻译：在多天线无线通信系统中提供发射分集的装置和方法
公开(公告)号：US07835426B2
公开(公告)日：2010-11-16
申请号：US11452471
申请日：2006-06-13
申请人： Jong Hyeon Park , Je Woo Kim , Ju Won Park
发明人： Jong Hyeon Park , Je Woo Kim , Ju Won Park
IPC分类号： H04B1/38 , H04B7/02 , H04L1/02
CPC分类号： H04L1/0606 , H04B7/0634 , H04L25/0206 , H04L27/2608
摘要： In an apparatus and method for providing transmit (Tx) diversity in a multi-antenna wireless communication system, Tx diversity is provided by estimating a channel to each antenna using a signal received from the antenna, estimating channel state information (CSI) from the first Tx node to each antenna using the estimated channel, and determining a signal to be transmitted to the antennas in different methods according to whether phase compensation is required for information to be transmitted using the estimated channel and the CSI.
摘要翻译：在用于在多天线无线通信系统中提供发射（Tx）分集的装置和方法中，通过使用从天线接收的信号估计到每个天线的信道来提供Tx分集，从第一个信道估计信道状态信息使用所估计的信道向每个天线发送Tx节点，并且根据是否需要使用所估计的信道和CSI发送的信息来相位补偿，以不同的方法确定要发送到天线的信号。

34. 发明申请

US20120163306A1 MULTI INPUT MULTI OUTPUT (MIMO) ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS (OFDMA) COMMUNICATION SYSTEM 有权
标题翻译：多输入多输出（MIMO）正交频分多址（OFDMA）通信系统
公开(公告)号：US20120163306A1
公开(公告)日：2012-06-28
申请号：US13172369
申请日：2011-06-29
申请人： Jong Hyeon Park , Ju Won Park , Je Woo Kim
发明人： Jong Hyeon Park , Ju Won Park , Je Woo Kim
IPC分类号： H04B7/04 , H04W72/04
CPC分类号： H04L1/0015 , H04B7/0417 , H04B7/0608 , H04B7/0689 , H04B7/0814 , H04B7/0871 , H04L1/0001 , H04L1/06 , H04L27/2608
摘要： An embodiment of the present invention is a technique to process signals in a communication system. In one embodiment, a plurality of signal processing units processes signals received from a plurality of antennae. The signal processor units are controlled by operational mode control signals. A channel estimator estimates channel responses using the processed signals according to an operational mode. An equalizer and combiner generates an equalized and combined signal using the received signals and the estimated channel responses. A Carrier to Interference Noise Ratio (CINR) estimator estimates CINR from the equalized and combined signal. The estimated CINR is used to generate the operational mode control signals. In another embodiment, a sub-carrier allocation controller generates sub-carrier allocation signals using an allocation base. A channel status information (CSI) and multiple input multiple output (MIMO) controller generates sub-carrier CSI signals and operational mode control signals using the sub-carrier allocation signals, estimated channel responses provided by a channel estimator, and an estimated CINR provided by an CINR estimator. The operational mode control signals select one of a plurality of antenna paths associated with a plurality of antennae. A transmitter diversity processor generates transmitter diversity signals as a function of at least a mapped signal Mk, the sub-carrier CSI signals, and the operational mode control signals.
摘要翻译：本发明的实施例是一种在通信系统中处理信号的技术。在一个实施例中，多个信号处理单元处理从多个天线接收的信号。信号处理器单元由操作模式控制信号控制。信道估计器根据操作模式使用经处理的信号估计信道响应。均衡器和组合器使用接收的信号和估计的信道响应产生均衡和组合的信号。载波干扰噪声比（CINR）估计器从均衡和组合信号估计CINR。估计的CINR用于产生操作模式控制信号。在另一实施例中，子载波分配控制器使用分配基地产生副载波分配信号。信道状态信息（CSI）和多输入多输出（MIMO）控制器使用子载波分配信号，由信道估计器提供的估计信道响应和估计的信道估计CINR产生副载波CSI信号和操作模式控制信号 CINR估计器。操作模式控制信号选择与多个天线相关联的多个天线路径之一。发射机分集处理器产生作为至少映射信号Mk，子载波CSI信号和操作模式控制信号的函数的发射机分集信号。

35. 发明授权

US08923424B2 Multi-term demapping for multi-channel wireless communication 有权
标题翻译：用于多通道无线通信的多项解映射
公开(公告)号：US08923424B2
公开(公告)日：2014-12-30
申请号：US12711128
申请日：2010-02-23
申请人： Michael L. McCloud , Matthias Brehler , Ju Won Park , Jong Hyeon Park , Je Woo Kim , Inyup Kang , Brian C. Banister
发明人： Michael L. McCloud , Matthias Brehler , Ju Won Park , Jong Hyeon Park , Je Woo Kim , Inyup Kang , Brian C. Banister
IPC分类号： H04B7/02 , H04L25/03 , H04B7/04
CPC分类号： H04L25/03229 , H04B7/0413 , H04L25/03242 , H04L25/03318 , H04L2025/0342 , H04L2025/03426
摘要： Providing for reduced complexity or improved accuracy in de-mapping received wireless data streams for multi-channel wireless communication is described herein. By way of example, a low-complexity likelihood algorithm can be employed to de-map data bits from the wireless data streams. In one particular example, the likelihood algorithm can approximate a received bit with a subset of received wireless symbols correlated the bit, reducing algorithm complexity. In other examples, a limited set of received wireless symbols can be employed for the subset, further reducing algorithm complexity. According to at least one other example, logarithmic terms of the algorithm can be approximated with non-logarithmic functions, such as a look-up table, series expansion, polynomial approximation, or the like. These approximations can enhance symbol de-mapping accuracy while maintaining or improving processing overhead for a wireless receiver.
摘要翻译：本文描述了为了解复用用于多信道无线通信的接收的无线数据流而提供降低的复杂度或提高的精度。作为示例，可以采用低复杂度似然算法来从无线数据流解映射数据比特。在一个特定示例中，似然算法可以用接收到的无线符号的子集近似接收到的比特，从而降低算法的复杂度。在其他示例中，可以对该子集采用有限的一组接收到的无线符号，进一步降低了算法的复杂度。根据至少另一个示例，算法的对数项可以用非对数函数来近似，例如查找表，串联展开，多项式近似等。这些近似可以增强符号解映射精度，同时保持或改善无线接收机的处理开销。

36. 发明授权

US08726138B2 Methods and systems for modified maximum-likelihood based TBCC decoding 有权
标题翻译：用于修改的最大似然的TBCC解码的方法和系统
公开(公告)号：US08726138B2
公开(公告)日：2014-05-13
申请号：US12250169
申请日：2008-10-13
申请人： Ju Won Park , Brian Banister , Je Woo Kim , Jong Hyeon Park , Matthias Brehler , Remi Gurski , Tae Chang
发明人： Ju Won Park , Brian Banister , Je Woo Kim , Jong Hyeon Park , Matthias Brehler , Remi Gurski , Tae Chang
IPC分类号： H03M13/00
CPC分类号： H03M13/413 , H03M13/3723 , H03M13/3955 , H03M13/3972 , H03M13/6544
摘要： A method and apparatus for decoding of tailbiting convolutional codes (TBCC) are disclosed. The proposed modified maximum-likelihood TBCC decoding technique preserves error correction performance of optimal maximum-likelihood based TBCC decoding, while the computational complexity is substantially decreased since a reduced number of decoding states has been evaluated. Compare to other sub-optimal TBCC decoding algorithms, modified maximum-likelihood TBCC decoding achieves improved packet error rate performance with similar computational complexity.
摘要翻译：公开了一种用于解码尾部卷积码（TBCC）的方法和装置。所提出的修改的最大似然TBCC解码技术保留了最佳最大似然度TBCC解码的纠错性能，同时由于已经减少了解码状态数量，所以计算复杂度显着降低。与其他次优TBCC解码算法相比，修改的最大似然TBCC解码实现了具有类似计算复杂度的改进的分组错误率性能。

37. 发明申请

US20110206151A1 MULTI-TERM DEMAPPING FOR MULTI-CHANNEL WIRELESS COMMUNICATION 有权
标题翻译：多通道无线通信多用途解决方案
公开(公告)号：US20110206151A1
公开(公告)日：2011-08-25
申请号：US12711128
申请日：2010-02-23
申请人： Michael L. McCloud , Matthias Brehler , Ju Won Park , Jong Hyeon Park , Je Woo Kim , Inyup Kang , Brian C. Banister
发明人： Michael L. McCloud , Matthias Brehler , Ju Won Park , Jong Hyeon Park , Je Woo Kim , Inyup Kang , Brian C. Banister
IPC分类号： H04L1/02 , H04L27/06
CPC分类号： H04L25/03229 , H04B7/0413 , H04L25/03242 , H04L25/03318 , H04L2025/0342 , H04L2025/03426
摘要： Providing for reduced complexity or improved accuracy in de-mapping received wireless data streams for multi-channel wireless communication is described herein. By way of example, a low-complexity likelihood algorithm can be employed to de-map data bits from the wireless data streams. In one particular example, the likelihood algorithm can approximate a received bit with a subset of received wireless symbols correlated the bit, reducing algorithm complexity. In other examples, a limited set of received wireless symbols can be employed for the subset, further reducing algorithm complexity. According to at least one other example, logarithmic terms of the algorithm can be approximated with non-logarithmic functions, such as a look-up table, series expansion, polynomial approximation, or the like. These approximations can enhance symbol de-mapping accuracy while maintaining or improving processing overhead for a wireless receiver.
摘要翻译：本文描述了为了解复用用于多信道无线通信的接收的无线数据流而提供降低的复杂度或提高的精度。作为示例，可以采用低复杂度似然算法来从无线数据流解映射数据比特。在一个特定示例中，似然算法可以用接收到的无线符号的子集近似接收到的比特，从而降低算法的复杂度。在其他示例中，可以对该子集采用有限的一组接收到的无线符号，进一步降低了算法的复杂度。根据至少另一个示例，算法的对数项可以用非对数函数来近似，例如查找表，串联展开，多项式近似等。这些近似可以增强符号解映射精度，同时保持或改善无线接收机的处理开销。

38. 发明申请

US20100095189A1 METHODS AND SYSTEMS FOR MODIFIED MAXIMUM-LIKELIHOOD BASED TBCC DECODING 有权
标题翻译：基于最大似然的TBCC解码的方法和系统
公开(公告)号：US20100095189A1
公开(公告)日：2010-04-15
申请号：US12250169
申请日：2008-10-13
申请人： Ju Won Park , Brian Banister , Je Woo Kim , Jong Hyeon Park , Matthias Brehler , Remi Gurski , Tae Chang
发明人： Ju Won Park , Brian Banister , Je Woo Kim , Jong Hyeon Park , Matthias Brehler , Remi Gurski , Tae Chang
IPC分类号： H03M13/23 , G06F11/10
CPC分类号： H03M13/413 , H03M13/3723 , H03M13/3955 , H03M13/3972 , H03M13/6544
摘要： A method and apparatus for decoding of tailbiting convolutional codes (TBCC) are disclosed. The proposed modified maximum-likelihood TBCC decoding technique preserves error correction performance of optimal maximum-likelihood based TBCC decoding, while the computational complexity is substantially decreased since a reduced number of decoding states has been evaluated. Compare to other sub-optimal TBCC decoding algorithms, modified maximum-likelihood TBCC decoding achieves improved packet error rate performance with similar computational complexity.
摘要翻译：公开了一种用于解码尾部卷积码（TBCC）的方法和装置。所提出的修改的最大似然TBCC解码技术保留了最佳最大似然度TBCC解码的纠错性能，同时由于已经减少了解码状态数量，所以计算复杂度显着降低。与其他次优TBCC解码算法相比，修改的最大似然TBCC解码实现了具有类似计算复杂度的改进的分组错误率性能。

39. 发明申请

US20080107220A1 METHODS AND APPARATUS FOR SIGNAL AND TIMING DETECTION IN WIRELESS COMMUNICATION SYSTEMS 有权
标题翻译：无线通信系统中信号和时序检测的方法与装置
公开(公告)号：US20080107220A1
公开(公告)日：2008-05-08
申请号：US11925719
申请日：2007-10-26
申请人： Ju Won Park , Jong Hyeon Park , Je Woo Kim
发明人： Ju Won Park , Jong Hyeon Park , Je Woo Kim
IPC分类号： H04L7/02
CPC分类号： H04L27/2662 , H04L27/2613 , H04L27/2676
摘要： In accordance with a detection method in a wireless communication system, an initial hypothesis for a starting position of a desired signal within a received wireless communication signal may be determined. The desired signal may have a conjugate symmetric property. At least one correlation value may be determined based on the initial hypothesis. The at least one correlation value may indicate the extent to which at least one sample sequence selected from the received signal has the conjugate symmetric property.
摘要翻译：根据无线通信系统中的检测方法，可以确定在所接收的无线通信信号内的期望信号的起始位置的初始假设。期望的信号可以具有共轭对称性质。可以基于初始假设来确定至少一个相关值。所述至少一个相关值可指示从接收信号中选择的至少一个采样序列具有共轭对称性质的程度。

40. 发明授权

US08265178B2 Methods and apparatus for signal and timing detection in wireless communication systems 有权
标题翻译：无线通信系统中信号和定时检测的方法和装置
公开(公告)号：US08265178B2
公开(公告)日：2012-09-11
申请号：US11925719
申请日：2007-10-26
申请人： Ju Won Park , Jong Hyeon Park , Je Woo Kim
发明人： Ju Won Park , Jong Hyeon Park , Je Woo Kim
IPC分类号： H04L7/02
CPC分类号： H04L27/2662 , H04L27/2613 , H04L27/2676
摘要： In accordance with a detection method in a wireless communication system, an initial hypothesis for a starting position of a desired signal within a received wireless communication signal may be determined. The desired signal may have a conjugate symmetric property. At least one correlation value may be determined based on the initial hypothesis. The at least one correlation value may indicate the extent to which at least one sample sequence selected from the received signal has the conjugate symmetric property.
摘要翻译：根据无线通信系统中的检测方法，可以确定在所接收的无线通信信号内的期望信号的起始位置的初始假设。期望的信号可以具有共轭对称性质。可以基于初始假设来确定至少一个相关值。所述至少一个相关值可指示从接收信号中选择的至少一个采样序列具有共轭对称性质的程度。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式