公开(公告)号：US20100197254A1

公开(公告)日：2010-08-05

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： H04B1/18

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：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：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：US20090158109A1

公开(公告)日：2009-06-18

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

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。

公开(公告)号：US20090154392A1

公开(公告)日：2009-06-18

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： H04Q7/00

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：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。

公开(公告)号：US20090316840A1

公开(公告)日：2009-12-24

申请号：US12211935

申请日：2008-09-17

申请人： Jong Hyeon Park ,  Brian Clark Banister ,  Inyup Kang ,  Je Woo Kim ,  James Y. Hurt ,  Matthias Brehler

发明人： Jong Hyeon Park ,  Brian Clark Banister ,  Inyup Kang ,  Je Woo Kim ,  James Y. Hurt ,  Matthias Brehler

IPC分类号： H04L27/06

CPC分类号： H04L1/0631 ,  H04L1/0662

摘要： Space time coding (STC) may be applied at the transmitter adding redundant information in both space and time dimensions. At the receiver, the received STC signal may be decoded using a spatial multiplexing MIMO decoding, for example, based on either Minimum Mean Square Error (MMSE) or maximum-likelihood (ML) algorithms. A selective STC decoder may incorporate both the conventional maximum ratio combining (MRC) decoding scheme and a MIMO decoding scheme. One of the STC decoding schemes may be selected, for example, based on estimated channel conditions in order to achieve a trade-off between error rate performance and computational complexity. Components used for a non-selected scheme may be powered down.

摘要翻译： 空间时间编码（STC）可以在发射机上应用于空间和时间维度上的冗余信息。 在接收机处，可以使用例如基于最小均方误差（MMSE）或最大似然（ML）算法的空间复用MIMO解码来解码所接收的STC信号。 选择性STC解码器可以并入传统的最大比组合（MRC）解码方案和MIMO解码方案。 可以例如基于估计的信道条件来选择STC解码方案之一，以便实现错误率性能和计算复杂度之间的权衡。 用于未选择方案的组件可能会关闭电源。

公开(公告)号：US07349461B2

公开(公告)日：2008-03-25

申请号：US10366040

申请日：2003-02-13

申请人： Serguei A. Glazko ,  James Y. Hurt ,  Kuei-Chiang Lai

发明人： Serguei A. Glazko ,  James Y. Hurt ,  Kuei-Chiang Lai

IPC分类号： H04B1/00 ,  H04L1/00

CPC分类号： H04B1/712 ,  H04B1/7093

摘要： An efficient method and apparatus for implementing a back-end channel matched filter in a receiver is disclosed. A typical channel matched filter embodiment includes a peak detector for establishing processing synchronization from a despread signal, a channel estimator producing a channel impulse response (CIR) estimate from the despread signal based on the synchronization by the peak detector and a back-end symbol combiner coherently combining dominant multipath components of the despread signal by weights based on the CIR estimate based on the synchronization by the peak detector to generate a decision variable. In a digital spread spectrum implementation, the despread signal operated on by the channel matched filter has been previously been correlated with a spreading sequence replica.

摘要翻译： 公开了一种在接收机中实现后端信道匹配滤波器的有效方法和装置。 典型的信道匹配滤波器实施例包括用于根据解扩信号建立处理同步的峰值检测器，基于峰值检测器的同步的去扩展信号产生信道脉冲响应（CIR）估计的信道估计器和后端符号组合器 基于通过峰值检测器的同步的基于CIR估计的权重相加地组合去扩展信号的主要多径分量以产生决策变量。 在数字扩频实现中，由信道匹配滤波器操作的解扩信号先前已经与扩展序列副本相关联。

公开(公告)号：US07940832B2

公开(公告)日：2011-05-10

申请号：US10959516

申请日：2004-10-05

申请人： Nikolai Schlegel ,  James Y. Hurt

发明人： Nikolai Schlegel ,  James Y. Hurt

IPC分类号： H04B1/00

CPC分类号： H04J13/0048 ,  H03M13/2703

摘要： A method and apparatus is provided for efficient processing of signal in a communication system. The processing of the signal for transmission may include encoding a block of data at an encoding rate 1/R. The encoding produces R number of data symbols for every data bit in the block of data. A block of RAM (299, 600) is partitioned into a plurality of blocks of RAM to allow reading simultaneously data symbols from the plurality of blocks of RAM to produce an in-phase and a quad-phase data symbols simultaneously. At least two scramblers (306 and 307) are used for simultaneously scrambling the in-phase and quad-phase data symbols. A Walsh covering/summing block (700) followed by the scramblers provides efficient Walsh covering and summing of signals for a combined transmission from the communication system.

摘要翻译： 提供一种用于在通信系统中有效处理信号的方法和装置。 用于发送的信号的处理可以包括以编码率1 / R编码数据块。 编码为数据块中的每个数据位产生R个数据符号。 一块RAM（299,600）被划分成多个RAM块，以允许同时从多个RAM块读取数据符号以同时产生同相和四相数据符号。 至少两个加扰器（306和307）用于同时加扰同相和四相数据符号。 沃尔什覆盖/求和块（700）紧随其后的加扰器提供了有效的沃尔什覆盖和信号来自通信系统的组合传输的信号。

公开(公告)号：US06975584B1

公开(公告)日：2005-12-13

申请号：US09676345

申请日：2000-09-29

申请人： Nikolai Schlegel ,  James Y. Hurt

发明人： Nikolai Schlegel ,  James Y. Hurt

IPC分类号： H03M13/27 ,  H04B1/69 ,  H04L1/00 ,  H04J11/00

CPC分类号： H04L1/0071 ,  H03M13/2703 ,  H04L1/0041

摘要： A method and apparatus is provided for efficient processing of signal in a communication system. The processing of the signal for transmission may include encoding a block of data at an encoding rate 1/R. The encoding produces R number of data symbols for every data bit in the block of data. A block of RAM (299, 600) is partitioned into a plurality of blocks of RAM to allow reading simultaneously data symbols from the plurality of blocks of RAM to produce an in-phase and a quad-phase data symbols simultaneously. At least two scramblers (306 and 307) are used for simultaneously scrambling the in-phase and quad-phase data symbols. A Walsh covering/summing block (700) followed by the scramblers provides efficient Walsh covering and summing of signals for a combined transmission from the communication system.

摘要翻译： 提供一种用于在通信系统中有效处理信号的方法和装置。 用于发送的信号的处理可以包括以编码率1 / R编码数据块。 编码为数据块中的每个数据位产生R个数据符号。 一块RAM（299,600）被划分成多个RAM块，以允许同时从多个RAM块读取数据符号以同时产生同相和四相数据符号。 至少两个加扰器（306和307）用于同时加扰同相和四相数据符号。 沃尔什覆盖/求和块（700）紧随其后的加扰器提供了有效的沃尔什覆盖和信号来自通信系统的组合传输的信号。