公开(公告)号：US20070280363A1

公开(公告)日：2007-12-06

申请号：US11445735

申请日：2006-06-01

申请人： Se Bin Im ,  Jong Hyeon Park ,  Je Woo Kim ,  Hyung Jin Choi

发明人： Se Bin Im ,  Jong Hyeon Park ,  Je Woo Kim ,  Hyung Jin Choi

IPC分类号： H04K1/10

CPC分类号： H04L25/0212 ,  H04L5/0023 ,  H04L25/022 ,  H04L25/0228 ,  H04L25/0232 ,  H04L27/2647

摘要： An embodiment of the present invention is a technique to process signals in a communication system. A channel impulse response (CIR) generator generates a time-domain windowed CIR from a received signal using a window function. A thresholder thresholds the time-domain windowed CIR. A compensator compensates window effect for the thresholded time-domain windowed CIR to provide an enhanced channel estimate in frequency domain.

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。 信道脉冲响应（CIR）发生器使用窗口函数从接收到的信号生成时域窗口CIR。 阈值阈值限制了时域窗口的CIR。 补偿器补偿阈值时域窗口CIR的窗口效应，以在频域中提供增强的信道估计。

公开(公告)号：US08428197B2

公开(公告)日：2013-04-23

申请号：US11445735

申请日：2006-06-01

申请人： Se Bin Im ,  Jong Hyeon Park ,  Je Woo Kim ,  Hyung Jin Choi

发明人： Se Bin Im ,  Jong Hyeon Park ,  Je Woo Kim ,  Hyung Jin Choi

IPC分类号： H04L27/06

CPC分类号： H04L25/0212 ,  H04L5/0023 ,  H04L25/022 ,  H04L25/0228 ,  H04L25/0232 ,  H04L27/2647

摘要： An embodiment of the present invention is a technique to process signals in a communication system. A channel impulse response (CIR) generator generates a time-domain windowed CIR from a received signal using a window function. A thresholder thresholds the time-domain windowed CIR. A compensator compensates window effect for the thresholded time-domain windowed CIR to provide an enhanced channel estimate in frequency domain.

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。 信道脉冲响应（CIR）发生器使用窗口函数从接收到的信号生成时域窗口CIR。 阈值阈值限制了时域窗口的CIR。 补偿器补偿阈值时域窗口CIR的窗口效应，以在频域中提供增强的信道估计。

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：US08243775B2

公开(公告)日：2012-08-14

申请号：US12337641

申请日：2008-12-18

申请人： Junqiang Li ,  Je Woo Kim ,  Jong Hyeon Park ,  Matthias Brehler

发明人： Junqiang Li ,  Je Woo Kim ,  Jong Hyeon Park ,  Matthias Brehler

IPC分类号： H04L1/7083

CPC分类号： H04L27/2659 ,  H04J11/0073 ,  H04L27/2675 ,  H04L27/2684

摘要： Techniques for initial wireless network synchronization by a mobile station are provided. For certain embodiments, the techniques may involve a joint search for the cell identification (ID-cell index) and the coarse carrier frequency offset (CFO) estimation. For certain embodiments, the techniques may be based on hard correlation and binary differential despreading that substantially simplifies computational complexity compare to known techniques that independently search for the ID-cell index and perform CFO estimation.

摘要翻译： 提供了由移动台进行初始无线网络同步的技术。 对于某些实施例，这些技术可以涉及对小区标识（ID-小区索引）和粗略载波频率偏移（CFO）估计的联合搜索。 对于某些实施例，该技术可以基于硬相关和二进制差分解扩，其与独立地搜索ID小区索引并执行CFO估计的已知技术相比基本上简化了计算复杂度。

公开(公告)号：US08194588B2

公开(公告)日：2012-06-05

申请号：US11955645

申请日：2007-12-13

申请人： Jong Hyeon Park ,  Bok Tae Sim ,  Je Woo Kim ,  Serguei A. Glazko ,  Sameer Nanavati ,  James Y. Hurt

发明人： Jong Hyeon Park ,  Bok Tae Sim ,  Je Woo Kim ,  Serguei A. Glazko ,  Sameer Nanavati ,  James Y. Hurt

IPC分类号： H04W4/00

CPC分类号： H04L1/1845 ,  H04L1/1812

摘要： A method and apparatus for combining retransmitted hybrid automatic repeat-request (HARQ) messages divided into coding blocks in an orthogonal frequency-division multiplexing (OFDM)/orthogonal frequency-division multiple access (OFDMA) receiver are provided. According to such a coding-block-based HARQ combining scheme, the quality of each coding block may be compared to a threshold to determine whether the decoded bits or the HARQ combined signal should be saved for each coding block for subsequent HARQ iterations. In addition to reducing the required HARQ buffer size while preserving the combining gain, coding-block-based HARQ combining may also provide fast decoding and reduced power consumption when compared to conventional HARQ combining techniques.

摘要翻译： 提供了一种用于组合在正交频分复用（OFDM）/正交频分多址（OFDMA）接收机中被划分为编码块的重传的混合自动重复请求（HARQ）消息的方法和装置。 根据这样的基于编码块的HARQ组合方案，可以将每个编码块的质量与阈值进行比较，以确定是否应为每个编码块保存解码比特或HARQ组合信号以用于后续HARQ迭代。 除了减少所需的HARQ缓冲器大小同时保持组合增益之外，与常规HARQ组合技术相比，基于编码块的HARQ组合还可以提供快速解码和降低的功耗。

公开(公告)号：US08073393B2

公开(公告)日：2011-12-06

申请号：US12365896

申请日：2009-02-05

申请人： Yuanning Yu ,  James Y. Hurt ,  Jong Hyeon Park ,  Je Woo Kim

发明人： Yuanning Yu ,  James Y. Hurt ,  Jong Hyeon Park ,  Je Woo Kim

IPC分类号： H04B17/00 ,  H04B7/204

CPC分类号： H04L25/025 ,  H04L5/0007 ,  H04L25/0232

摘要： Certain embodiments of the present disclosure provide techniques for channel estimation without resorting to the channel second-order statistics. Methods and systems are proposed for improving the performance of an un-constrained least squares channel interpolator by using available side information of the channel, such as signal-to-noise ratio (SNR), Doppler frequency and/or delay spread.

摘要翻译： 本公开的某些实施例提供用于信道估计的技术，而不依赖于信道二阶统计。 提出了通过使用信道的可用侧信息（例如信噪比（SNR），多普勒频率和/或延迟扩展）来提高未受约束的最小二乘通道内插器的性能的方法和系统。

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：US20100067597A1

公开(公告)日：2010-03-18

申请号：US12211928

申请日：2008-09-17

申请人： Jong Hyeon Park ,  Allert van Zelst ,  Brian Clarke Banister ,  Je Woo Kim ,  Matthias Brehler ,  Vincent K. Jones, IV

发明人： Jong Hyeon Park ,  Allert van Zelst ,  Brian Clarke Banister ,  Je Woo Kim ,  Matthias Brehler ,  Vincent K. Jones, IV

IPC分类号： H04L5/12

CPC分类号： H04L25/03171 ,  H04L25/03197 ,  H04L25/03331 ,  H04L2025/03414 ,  H04L2025/03426

摘要： A “post-squaring” detection algorithm, and related devices, that may reduce the complexity of maximum likelihood detection (MLD) schemes while preserving their performance is provided. Rather than search for optimum metrics (such as minimum distance metrics) based on squared norm values, a search may be based on un-squared norm metrics, and the squaring may be postponed, for example, until subsequent log-likelihood ratio (LLR) computation. For certain embodiments, approximations of un-squared norm values may significantly reduce computation complexity.

摘要翻译： 提供了可以降低最大似然检测（MLD）方案的复杂性同时保持其性能的“后置”检测算法和相关设备。 搜索可以基于平方范数，而不是基于平方范数搜索最佳度量（例如最小距离度量），并且可以延迟平方，例如直到后续的对数似然比（LLR） 计算。 对于某些实施例，非平方范数值的近似可以显着降低计算复杂度。

公开(公告)号：US20100067596A1

公开(公告)日：2010-03-18

申请号：US12211890

申请日：2008-09-17

申请人： Jong Hyeon Park ,  Youngjae Kim ,  Je Woo Kim

发明人： Jong Hyeon Park ,  Youngjae Kim ,  Je Woo Kim

IPC分类号： H04L5/12

CPC分类号： H04L25/03254 ,  H04L1/0054 ,  H04L1/0055 ,  H04L25/03171 ,  H04L25/03286 ,  H04L25/067 ,  H04L2025/03726

摘要： Certain embodiments of the present disclosure allow a receiver to utilize both a minimum mean square error (MMSE) detection algorithm and a maximum likelihood (ML) detection algorithm. The receiver may control, based on various conditions, a mode selection signal to select between output generated with the MMSE detection algorithm and the ML detection algorithm. By sharing logical components, certain embodiments may allow a receiver to implement both ML and MMSE detection algorithms with minimal computational overhead when compared to implementing a single one of the decoding algorithms.

摘要翻译： 本公开的某些实施例允许接收机同时使用最小均方误差（MMSE）检测算法和最大似然（ML）检测算法。 接收机可以根据各种条件控制模式选择信号，以在MMSE检测算法产生的输出和ML检测算法之间进行选择。 通过共享逻辑组件，当与实现单个解码算法相比时，某些实施例可以允许接收机以最小的计算开销来实现ML和MMSE检测算法。