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。

公开(公告)号：US08000411B2

公开(公告)日：2011-08-16

申请号：US11969857

申请日：2008-01-04

申请人： Jong Hyeon Park ,  Bok Tae Sim ,  Je Woo Kim ,  Serguei A. Glazko ,  Sameer Nanavati ,  Ju Won Park ,  Chun Woo Lee ,  Tae Ryun Chang

发明人： Jong Hyeon Park ,  Bok Tae Sim ,  Je Woo Kim ,  Serguei A. Glazko ,  Sameer Nanavati ,  Ju Won Park ,  Chun Woo Lee ,  Tae Ryun Chang

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H04L1/0054 ,  H04L1/006 ,  H04L1/0072

摘要： A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of the encoded data bits may be generated. Decoding paths that correspond to decoded data bits that are inconsistent with the a-priori bit values may be removed from the possible decoding paths to consider, and decoding the encoded data bits by selecting a decoding path from remaining decoding paths of the possible decoding paths that were not removed. Multiple hypotheses, each corresponding to a different set of a-prior bit values may be evaluated, with the decoded data for a hypothesis selected based on the evaluation output for further processing.

摘要翻译： 提供了一种用于解码无线通信传输的编码数据位的方法和装置。 可以生成对应于编码数据位的已知位值的一组先验位值。 可以从可能的解码路径中去除对应于与先验比特值不一致的解码数据比特的解码路径，并且通过从可能的解码路径的剩余解码路径中选择解码路径来解码编码数据比特， 没有删除。 可以评估每个对应于先前比特值的不同集合的多个假设，其中基于用于进一步处理的评估输出选择的假设的解码数据。

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。

公开(公告)号：US08731109B2

公开(公告)日：2014-05-20

申请号：US12123408

申请日：2008-05-19

申请人： Je Woo Kim ,  Bok Tae Sim ,  Ju Won Park ,  Tae Ryun Chang ,  Jong Hyeon Park

发明人： Je Woo Kim ,  Bok Tae Sim ,  Ju Won Park ,  Tae Ryun Chang ,  Jong Hyeon Park

IPC分类号： H04L25/02

CPC分类号： H04L25/0216 ,  H04L25/022 ,  H04L27/2647

摘要： A method and apparatus for channel estimation in wireless communications are provided. After an initial channel estimation and an estimation of the effective channel length (ECL) are performed, a weighting based on the ECL may be applied in an effort to remove noise from the initial channel estimate and provide an estimated channel with increased accuracy. Different weightings may apply for different channel lengths. A threshold may be used during the ECL estimation, and the threshold may be predetermined or calculated in an effort to adapt to different channel environments.

摘要翻译： 提供了一种用于无线通信中信道估计的方法和装置。 在执行初始信道估计和有效信道长度（ECL）的估计之后，可以应用基于ECL的加权来努力去除初始信道估计中的噪声，并提供具有增加的精度的估计信道。 不同的加权可能适用于不同的通道长度。 在ECL估计期间可以使用阈值，并且可以预先确定或计算阈值以努力适应不同的信道环境。

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。

公开(公告)号：US07995689B2

公开(公告)日：2011-08-09

申请号：US11454726

申请日：2006-06-16

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： H04B7/10 ,  H04L1/02

CPC分类号： H04L27/2665 ,  H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03426

摘要： An apparatus and a method can improve the performance of a smart antenna system for signal processing in the frequency domain. The method includes: performing Fast Fourier Transform (FFT) on a plurality of incoming signals received through antennas according to a predetermined FFT window; detecting a boundary of an OFDM symbol and setting the FFT window with a margin as large as a predetermined FFT window offset with reference to the detected symbol boundary; receiving the FFT window offset and generating an FFT window calibration signal; and multiplying the FFT-processed incoming signals by the FFT window calibration signal. The method can improve the reception performance of a base station by compensating for the multi-path channel by using an RX FEQ coefficient obtained by a receiver of a terminal as an FEQ weight of a transmitter of the terminal. Further, the method can generate a uniform non-directional beam by generating a variable omni-directional beam pattern in a smart antenna system.

摘要翻译： 一种装置和方法可以改善用于频域信号处理的智能天线系统的性能。 该方法包括：根据预定的FFT窗口对通过天线接收的多个输入信号执行快速傅里叶变换（FFT）; 检测OFDM符号的边界，并且参考检测到的符号边界将FFT窗口设置为与预定FFT窗口偏移量一样大的余量; 接收FFT窗口偏移并产生FFT窗口校准信号; 并将经FFT处理的输入信号乘以FFT窗口校准信号。 该方法可以通过使用由终端的接收机获得的RX FEQ系数作为终端的发射机的FEQ权重来补偿多径信道来提高基站的接收性能。 此外，该方法可以通过在智能天线系统中生成可变全向波束图案来生成均匀的无方向波束。

公开(公告)号：US20090158110A1

公开(公告)日：2009-06-18

申请号：US11956278

申请日：2007-12-13

申请人： Jong Hyeon Park ,  Bok Tae Sim ,  Je Woo Kim ,  Serguei A. Glazko ,  Sameer Nanavati ,  Ju Won Park

发明人： Jong Hyeon Park ,  Bok Tae Sim ,  Je Woo Kim ,  Serguei A. Glazko ,  Sameer Nanavati ,  Ju Won Park

IPC分类号： H04L1/18 ,  G06F11/14

CPC分类号： H04L1/1845 ,  H04L1/1812

摘要： A method and apparatus for combining retransmitted hybrid automatic repeat-request (HARQ) messages at different stages in an OFDM/OFDMA receiver are provided. A combination of different types of HARQ combiners may be designed into the 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. Furthermore, the HARQ combiner type may be dynamically selected through forward and reverse shifting between the different types of HARQ combining schemes in an effort to decrease the bit error ratio (BER) without saturating the HARQ buffer.

摘要翻译： 提供了一种用于在OFDM / 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。 可以将不同类型的HARQ组合器的组合设计到接收机中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。 此外，可以通过在不同类型的HARQ组合方案之间的正向和反向移位来动态地选择HARQ组合器类型，以努力降低误码率（BER）而不使HARQ缓冲器饱和。

公开(公告)号：US20090154627A1

公开(公告)日：2009-06-18

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： H04L7/00

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。

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。

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。