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    Methods and systems for reducing PAPR of an OFDM signal
    1.
    发明授权
    Methods and systems for reducing PAPR of an OFDM signal 失效
    减少OFDM信号PAPR的方法和系统

    公开(公告)号：US08509324B2

    公开(公告)日：2013-08-13

    申请号：US12169625

    申请日：2008-07-08

    申请人： Je Woo Kim ,  Ayman Fawzy Naguib ,  Jong Hyeon Park ,  Tae Ryun Chang

    发明人： Je Woo Kim ,  Ayman Fawzy Naguib ,  Jong Hyeon Park ,  Tae Ryun Chang

    IPC分类号： H04K1/10

    CPC分类号： H04L5/0007 ,  H04L27/2602 ,  H04L27/2614

    摘要： Certain embodiments of the present disclosure provide a method and an apparatus for peak-to-average power ratio (PAPR) reduction of a transmission signal in a single carrier frequency division multiple access (SC-FDMA) system. The method may utilize a permutation of a time domain signal, and/or a permutation of a frequency domain signal or a permutation of a signal transformed by a unitary matrix. The apparatus may include an M-point DFT or some other M×M unitary matrix, N-point IDFT, interpolation and frequency conversion units, and a pair of possibly different permutation matrices of size M×M, where M can be less or equal than N.

    摘要翻译： 本公开的某些实施例提供了在单载波频分多址（SC-FDMA）系统中发送信号的峰均功率比（PAPR）降低的方法和装置。 该方法可以利用时域信号的置换和/或频域信号的置换或由酉矩阵变换的信号的置换。 该装置可以包括M点DFT或一些其他M×M酉矩阵，N点IDFT，内插和频率转换单元，以及大小为M×M的一对可能不同的置换矩阵，其中M可以小于或等于 比N.

    METHODS AND SYSTEMS FOR REDUCING PAPR OF AN OFDM SIGNAL
    2.
    发明申请
    METHODS AND SYSTEMS FOR REDUCING PAPR OF AN OFDM SIGNAL 失效
    减少OFDM信号PAPR的方法和系统

    公开(公告)号：US20100008432A1

    公开(公告)日：2010-01-14

    申请号：US12169625

    申请日：2008-07-08

    申请人： Je Woo Kim ,  Ayman Fawzy Naguib ,  Jong Hyeon Park ,  Tae Ryun Chang

    发明人： Je Woo Kim ,  Ayman Fawzy Naguib ,  Jong Hyeon Park ,  Tae Ryun Chang

    IPC分类号： H04L27/28

    CPC分类号： H04L5/0007 ,  H04L27/2602 ,  H04L27/2614

    摘要： Certain embodiments of the present disclosure provide a method and an apparatus for peak-to-average power ratio (PAPR) reduction of a transmission signal in a single carrier frequency division multiple access (SC-FDMA) system. The method may utilize a permutation of a time domain signal, and/or a permutation of a frequency domain signal or a permutation of a signal transformed by a unitary matrix. The apparatus may include an M-point DFT or some other M×M unitary matrix, N-point IDFT, interpolation and frequency conversion units, and a pair of possibly different permutation matrices of size M×M, where M can be less or equal than N.

    摘要翻译： 本公开的某些实施例提供了在单载波频分多址（SC-FDMA）系统中发送信号的峰均功率比（PAPR）降低的方法和装置。 该方法可以利用时域信号的置换和/或频域信号的置换或由酉矩阵变换的信号的置换。 该装置可以包括M点DFT或一些其他MxM酉矩阵，N点IDFT，内插和频率转换单元，以及大小为M×M的一对可能不同的置换矩阵，其中M可以小于或等于N.

    Methods and systems for effective channel estimation in OFDM systems
    3.
    发明授权
    Methods and systems for effective channel estimation in OFDM systems 有权
    OFDM系统中有效信道估计的方法和系统

    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。

    Decoding scheme using multiple hypotheses about transmitted messages
    4.
    发明授权
    Decoding scheme using multiple hypotheses about transmitted messages 有权
    使用关于发送的消息的多个假设的解码方案

    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。

    METHODS AND SYSTEMS FOR EFFECTIVE CHANNEL ESTIMATION IN OFDM SYSTEMS
    8.
    发明申请
    METHODS AND SYSTEMS FOR EFFECTIVE CHANNEL ESTIMATION IN OFDM SYSTEMS 有权
    OFDM系统中有效信道估计的方法与系统

    公开(公告)号：US20090285317A1

    公开(公告)日：2009-11-19

    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： H04L27/28

    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。

    Decoding scheme using A-priori information about transmitted messages
    10.
    发明授权
    Decoding scheme using A-priori information about transmitted messages 失效
    使用关于发送的消息的先验信息的解码方案

    公开(公告)号：US08259866B2

    公开(公告)日：2012-09-04

    申请号：US11969724

    申请日：2008-01-04

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

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

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H03M13/00 ,  H03M13/3994

    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.

    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。