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    Methods and systems for effective channel estimation in OFDM systems
    1.
    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
    2.
    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
    4.
    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
    6.
    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。

    DECODING SCHEME USING A-PRIORI INFORMATION ABOUT TRANSMITTED MESSAGES
    7.
    发明申请
    DECODING SCHEME USING A-PRIORI INFORMATION ABOUT TRANSMITTED MESSAGES 失效
    使用关于传输信息的原始信息来解码方案

    公开(公告)号：US20090175388A1

    公开(公告)日：2009-07-09

    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： 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对编码数据比特进行解码， 没有删除。

    DECODING SCHEME USING MULTIPLE HYPOTHESES ABOUT TRANSMITTED MESSAGES
    8.
    发明申请
    DECODING SCHEME USING MULTIPLE HYPOTHESES ABOUT TRANSMITTED MESSAGES 有权
    使用关于传输信息的多个假设来解码方案

    公开(公告)号：US20090175387A1

    公开(公告)日：2009-07-09

    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： H04L27/06

    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。

    FORWARD AND REVERSE SHIFTING SELECTIVE HARQ COMBINING SCHEME FOR OFDMA SYSTEMS
    9.
    发明申请
    FORWARD AND REVERSE SHIFTING SELECTIVE HARQ COMBINING SCHEME FOR OFDMA SYSTEMS 有权
    FORDMA系统的前向和反向移位选择性HARQ组合方案

    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。

    Forward and reverse shifting selective HARQ combining scheme for OFDMA systems
    10.
    发明授权
    Forward and reverse shifting selective HARQ combining scheme for OFDMA systems 有权
    用于OFDMA系统的正向和反向移位选择性HARQ组合方案

    公开(公告)号：US08161342B2

    公开(公告)日：2012-04-17

    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： G08C25/02 ,  G08C25/00

    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。