公开(公告)号：US20060029236A1

公开(公告)日：2006-02-09

申请号：US11161585

申请日：2005-08-09

申请人： Kuo-Ming Wu ,  Der-Zheng Liu

发明人： Kuo-Ming Wu ,  Der-Zheng Liu

IPC分类号： H03G5/00 ,  H04B3/14 ,  H01P9/00

CPC分类号： H04L25/03057 ,  H04B1/71637 ,  H04B1/719 ,  H04L2025/03414

摘要： An apparatus and a method for equalizing a received signal to generate an equalized signal are disclosed. The apparatus includes a channel estimator for generating a channel estimation value according to a preamble symbol in the received signal and for generating a channel response value according to the channel estimation value, an interference power estimation circuit for generating an interference power estimate according to a hard decision value, the channel response value, and the received signal, and an equalization circuit for equalizing the received signal according to the channel response value and the adjusted interference power estimate to generate the equalized signal. The hard decision value corresponds to the equalized signal.

摘要翻译： 公开了一种用于均衡接收信号以产生均衡信号的装置和方法。 该装置包括：信道估计器，用于根据接收信号中的前导码符号生成信道估计值，并根据信道估计值产生信道响应值;干扰功率估计电路，用于根据硬信号产生干扰功率估计 判定值，信道响应值和接收信号，以及用于根据信道响应值和调整后的干扰功率估计均衡接收信号以产生均衡信号的均衡电路。 硬判定值对应于均衡信号。

公开(公告)号：US08184749B2

公开(公告)日：2012-05-22

申请号：US12562332

申请日：2009-09-18

申请人： Yen-Chih Chen ,  Tsung-Chun Cheng ,  Der-Zheng Liu

发明人： Yen-Chih Chen ,  Tsung-Chun Cheng ,  Der-Zheng Liu

IPC分类号： H04L27/06

CPC分类号： H04L25/03242

摘要： A sphere decoding method applied to a MIMO channel is provided. Multiple constellation points of an nth detection layer corresponding to a MIMO channel matrix are enumerated based on an enumeration rule, and at least one nth sub-set of the nth detection layer is defined. The candidate range of the constellation points of the at least one nth sub-set is determined according to a predetermined number K of the preferred points of the at least one nth sub-set. K constellation points are obtained from the at least one nth sub-set as the preferred points according to partial Euclidean distances of the constellation points. The at least one nth sub-set includes at least K constellation points. Kn preferred points are selected from all K preferred points of the at least one nth sub-set. An optimal solution is determined according to the Kn, preferred points.

摘要翻译： 提供了应用于MIMO信道的球体解码方法。 对应于MIMO信道矩阵的第n个检测层的多个星座点基于枚举规则进行枚举，并且定义第n个检测层的至少第n个子集。 根据至少第n个子集的优选点的预定数量K来确定至少第n个子集的星座点的候选范围。 根据星座点的部分欧几里德距离，从至少第n个子集获得K个星座点作为优选点。 至少第n个子集包括至少K个星座点。 从至少第n个子集的所有K个优选点中选择Kn个优选点。 根据Kn，首选点确定最优解。

公开(公告)号：US08184735B2

公开(公告)日：2012-05-22

申请号：US12562305

申请日：2009-09-18

申请人： Yen-Chih Chen ,  Tsung-Chun Cheng ,  Der-Zheng Liu

发明人： Yen-Chih Chen ,  Tsung-Chun Cheng ,  Der-Zheng Liu

IPC分类号： H04L7/02

CPC分类号： H04L25/03242

摘要： A sphere decoding method applied to a MIMO channel is provided. Multiple constellation points of an nth detection layer corresponding to the MIMO channel matrix are enumerated based on an enumeration rule, and at least one nth sub-set of the nth detection layer is defined. The constellation point with the least PED is obtained as a preferred point. Another constellation, not in the nth sub-set, of the nth detection layer is selected to substitute for the preferred point as one of the nth sub-set. If other preferred points are needed to be obtained, the nth sub-set is updated repeatedly according to the least PED. An optimal solution is determined according to Kn preferred points of the nth detection layer.

摘要翻译： 提供了应用于MIMO信道的球体解码方法。 基于枚举规则，列举与MIMO信道矩阵对应的第n检测层的多个星座点，并且定义第n个检测层的至少第n个子集。 获得具有最少PED的星座点作为优选点。 选择第n个检测层的不在第n个子集中的另一星座代替优选点作为第n个子集之一。 如果需要其他优选点，则根据最小PED重复更新第n个子集。 根据第n个检测层的Kn优选点确定最佳解。

公开(公告)号：US08208575B2

公开(公告)日：2012-06-26

申请号：US12562351

申请日：2009-09-18

申请人： Yen-Chih Chen ,  Tsung-Chun Cheng ,  Der-Zheng Liu

发明人： Yen-Chih Chen ,  Tsung-Chun Cheng ,  Der-Zheng Liu

IPC分类号： H04L1/02

CPC分类号： H04B7/0413

摘要： A sphere decoding method applied to a MIMO channel is provided. T signals transmitted via the MIMO channel are received. A first triangular matrix corresponding to a channel matrix is generated and mapped from the complex domain into the real domain to obtain a second triangular matrix. A first zero-forcing soft-output solution corresponding to a first estimation layer is found, and multiple preferred points P(1) are obtained. Multiple n-th zero-forcing soft-output solutions corresponding to an n-th estimation layer are obtained according to multiple preferred points P(n−1), and multiple preferred points P(n) are obtained according to PEDs of multiple n-th constellation points. Multiple 2T-th zero-forcing soft-output solutions are obtained according to the preferred points P(2T−1) and multiple preferred points P(2T) are obtained correspondingly. The preferred point P(2T) corresponding to the least PED is mapped from the real domain into the complex domain to generate an optimal solution of the T signals.

摘要翻译： 提供了应用于MIMO信道的球体解码方法。 接收经由MIMO信道发送的T信号。 生成对应于信道矩阵的第一个三角矩阵，并将其从复杂域映射到真实域中以获得第二个三角矩阵。 找到对应于第一估计层的第一强迫软输出解，并且获得多个优选点P（1）。 根据多个优选点P（n-1）获得与第n个估计层相对应的多个第n个强制软输出解，并且根据多个n个估计层的PED获得多个优选点P（n） 第三个星座点。 根据优选点P（2T-1）获得多个2T的零强制软输出解，并且相应地获得多个优选点P（2T）。 对应于最小PED的优选点P（2T）从真实域映射到复杂域以产生T信号的最优解。

公开(公告)号：US07864905B2

公开(公告)日：2011-01-04

申请号：US11161585

申请日：2005-08-09

申请人： Kuo-Ming Wu ,  Der-Zheng Liu

发明人： Kuo-Ming Wu ,  Der-Zheng Liu

IPC分类号： H04B1/10

CPC分类号： H04L25/03057 ,  H04B1/71637 ,  H04B1/719 ,  H04L2025/03414

摘要： An apparatus and a method for equalizing a received signal to generate an equalized signal are disclosed. The apparatus includes a channel estimator for generating a channel estimation value according to a preamble symbol in the received signal and for generating a channel response value according to the channel estimation value, an interference power estimation circuit for generating an interference power estimate according to a hard decision value, the channel response value, and the received signal, and an equalization circuit for equalizing the received signal according to the channel response value and the adjusted interference power estimate to generate the equalized signal. The hard decision value corresponds to the equalized signal.

摘要翻译： 公开了一种用于均衡接收信号以产生均衡信号的装置和方法。 该装置包括：信道估计器，用于根据接收信号中的前导码符号生成信道估计值，并根据信道估计值产生信道响应值;干扰功率估计电路，用于根据硬信号产生干扰功率估计 判定值，信道响应值和接收信号，以及用于根据信道响应值和调整后的干扰功率估计均衡接收信号以产生均衡信号的均衡电路。 硬判定值对应于均衡信号。

公开(公告)号：US20100074375A1

公开(公告)日：2010-03-25

申请号：US12562305

申请日：2009-09-18

申请人： Yen-Chih Chen ,  Tsung-Chun Cheng ,  Der-Zheng Liu

发明人： Yen-Chih Chen ,  Tsung-Chun Cheng ,  Der-Zheng Liu

IPC分类号： H04L27/06

CPC分类号： H04L25/03242

摘要： A sphere decoding method applied to a MIMO channel is provided. Multiple constellation points of an nth detection layer corresponding to the MIMO channel matrix are enumerated based on an enumeration rule, and at least one nth sub-set of the nth detection layer is defined. The constellation point with the least PED is obtained as a preferred point. Another constellation, not in the nth sub-set, of the nth detection layer is selected to substitute for the preferred point as one of the nth sub-set. If other preferred points are needed to be obtained, the nth sub-set is updated repeatedly according to the least PED. An optimal solution is determined according to Kn preferred points of the nth detection layer.

摘要翻译： 提供了应用于MIMO信道的球体解码方法。 基于枚举规则，列举与MIMO信道矩阵对应的第n检测层的多个星座点，并且定义第n个检测层的至少第n个子集。 获得具有最少PED的星座点作为优选点。 选择第n个检测层的不在第n个子集中的另一星座代替优选点作为第n个子集之一。 如果需要其他优选点，则根据最小PED重复更新第n个子集。 根据第n个检测层的Kn优选点确定最佳解。

公开(公告)号：US07848434B2

公开(公告)日：2010-12-07

申请号：US11161401

申请日：2005-08-02

申请人： Kuo-Ming Wu ,  Der-Zheng Liu

发明人： Kuo-Ming Wu ,  Der-Zheng Liu

IPC分类号： H04K1/10

CPC分类号： H04L25/0212 ,  H04L25/0232 ,  H04L27/2647

摘要： A channel estimator and a related method for smoothing channel responses of a multi-carrier system. The channel estimator includes a channel response computing circuit for computing at least one of a target channel estimation and a reference channel estimation by utilizing a computing algorithm, wherein the target channel estimation and the reference channel estimation corresponds to a sub-carrier channel respectively.

摘要翻译： 用于平滑多载波系统的信道响应的信道估计器和相关方法。 信道估计器包括通过利用计算算法来计算目标信道估计和参考信道估计中的至少一个的信道响应计算电路，其中目标信道估计和参考信道估计分别对应于子载波信道。

公开(公告)号：US20100074376A1

公开(公告)日：2010-03-25

申请号：US12562332

申请日：2009-09-18

申请人： Yen-Chih Chen ,  Tsung-Chun Cheng ,  Der-Zheng Liu

发明人： Yen-Chih Chen ,  Tsung-Chun Cheng ,  Der-Zheng Liu

IPC分类号： H04L27/06

CPC分类号： H04L25/03242

摘要： A sphere decoding method applied to a MIMO channel is provided. Multiple constellation points of an nth detection layer corresponding to a MIMO channel matrix are enumerated based on an enumeration rule, and at least one nth sub-set of the nth detection layer is defined. The candidate range of the constellation points of the at least one nth sub-set is determined according to a predetermined number K of the preferred points of the at least one nth sub-set. K constellation points are obtained from the at least one nth sub-set as the preferred points according to partial Euclidean distances of the constellation points. The at least one nth sub-set includes at least K constellation points. Kn preferred points are selected from all K preferred points of the at least one nth sub-set. An optimal solution is determined according to the Kn, preferred points.

摘要翻译： 提供了应用于MIMO信道的球体解码方法。 对应于MIMO信道矩阵的第n个检测层的多个星座点基于枚举规则进行枚举，并且定义第n个检测层的至少第n个子集。 根据至少第n个子集的优选点的预定数量K来确定至少第n个子集的星座点的候选范围。 根据星座点的部分欧几里德距离，从至少第n个子集获得K个星座点作为优选点。 至少第n个子集包括至少K个星座点。 从至少第n个子集的所有K个优选点中选择Kn个优选点。 根据Kn，首选点确定最优解。

公开(公告)号：US20100074361A1

公开(公告)日：2010-03-25

申请号：US12562351

申请日：2009-09-18

申请人： Yen-Chih Chen ,  Tsung-Chun Cheng ,  Der-Zheng Liu

发明人： Yen-Chih Chen ,  Tsung-Chun Cheng ,  Der-Zheng Liu

IPC分类号： H04B7/02

CPC分类号： H04B7/0413

摘要： A sphere decoding method applied to a MIMO channel is provided. T signals transmitted via the MIMO channel are received. A first triangular matrix corresponding to a channel matrix is generated and mapped from the complex domain into the real domain to obtain a second triangular matrix. A first zero-forcing soft-output solution corresponding to a first estimation layer is found, and multiple preferred points P(1) are obtained. Multiple n-th zero-forcing soft-output solutions corresponding to an n-th estimation layer are obtained according to multiple preferred points P(n−1), and multiple preferred points P(n) are obtained according to PEDs of multiple n-th constellation points. Multiple 2T-th zero-forcing soft-output solutions are obtained according to the preferred points P(2T−1) and multiple preferred points P(2T) are obtained correspondingly. The preferred point P(2T) corresponding to the least PED is mapped from the real domain into the complex domain to generate an optimal solution of the T signals.

摘要翻译： 提供了应用于MIMO信道的球体解码方法。 接收经由MIMO信道发送的T信号。 生成对应于信道矩阵的第一个三角矩阵，并将其从复杂域映射到真实域中以获得第二个三角矩阵。 找到对应于第一估计层的第一强迫软输出解，并且获得多个优选点P（1）。 根据多个优选点P（n-1）获得与第n个估计层相对应的多个第n个强制软输出解，并且根据多个n个估计层的PED获得多个优选点P（n） 第三个星座点。 根据优选点P（2T-1）获得多个2T的零强制软输出解，并且相应地获得多个优选点P（2T）。 对应于最小PED的优选点P（2T）从真实域映射到复杂域以产生T信号的最优解。

公开(公告)号：US20060067430A1

公开(公告)日：2006-03-30

申请号：US11162831

申请日：2005-09-25

申请人： Kuo-Ming Wu ,  Der-Zheng Liu

发明人： Kuo-Ming Wu ,  Der-Zheng Liu

IPC分类号： H03D3/00

CPC分类号： H04L27/2657 ,  H04L2027/0026

摘要： A band averaging circuit and a related method for estimating a carrier frequency offset are applied in a multi-band multi-carrier communication system. A packet of the multi-band multi-carrier communication system is transmitted via a plurality of carriers. The band averaging circuit includes a frequency offset estimation unit for generating a plurality of carrier frequency offset ratios corresponding to the carriers according to a received packet; and a frequency offset adjustment circuit coupled to the frequency offset estimation unit for calculating a weighted average carrier frequency offset ratio according to carrier frequency offset ratios and comparison results of the carrier frequency offset ratios, and also for calculating a carrier frequency offset of each carrier according to the weighted average carrier frequency offset ratio and a center frequency of the carrier.

摘要翻译： 用于估计载波频率偏移的频带平均电路和相关方法被应用在多频带多载波通信系统中。 经由多个载波发送多频带多载波通信系统的分组。 频带平均电路包括：频率偏移估计单元，用于根据接收的分组产生对应于载波的多个载波频率偏移比; 以及频率偏移调整电路，其耦合到所述频率偏移估计单元，用于根据载波频率偏移比和所述载波频率偏移比的比较结果计算加权平均载波频率偏移比，并且还用于根据载波频率偏移比来计算每个载波的载波频率偏移 加权平均载波频率偏移比和载波的中心频率。