公开(公告)号：US07782757B2

公开(公告)日：2010-08-24

申请号：US12204422

申请日：2008-09-04

申请人： Lai-Huei Wang ,  Pang-An Ting ,  Jia-Hao Wu ,  Jiun-Yo Lai

发明人： Lai-Huei Wang ,  Pang-An Ting ,  Jia-Hao Wu ,  Jiun-Yo Lai

IPC分类号： H04J11/00 ,  H04B7/185 ,  H04W4/00 ,  H03D1/04

CPC分类号： H04L5/0051 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/0062 ,  H04L5/0085 ,  H04L25/0216 ,  H04L25/0224

摘要： A method, and device implementing the method, for adaptively allocating pilot signals in a wireless communication system. The method includes receiving channel data, including channel length (L) data, inter-carrier interference power (PICI) data, coherence time (CT) data, and a number of subcarriers (N). The method further includes selecting, when L is greater than a first channel length threshold (LTH1), a first number of pilot signals between a minimum value of L and a maximum number of pilot signals NP,MAX, wherein the first number of pilot signals NP are equally spaced in time according to the CT data, and equally spaced in frequency. Further, the method includes selecting, when L is less than LTH1 and PICI is less than a power threshold (PTH), a second number of pilot signals such that the second number of pilot signals is between the minimum value of L and NP,MAX, wherein the second number of pilot signals are equally spaced in time according to the CT data, and equally spaced in frequency. Finally, the method includes selecting, when L is less than LTH1 and PICI is greater than PTH, a third number of pilot signals such that the third number of pilot signals is equal to n times L (nL), wherein n is an integer, the third number of pilot signals being equally spaced in time according to the CT data, and allocated according to a cluster(n) clustered pilot scheme with a cluster size equal to n, the n-sized clusters being clustered in frequency.

摘要翻译： 一种实现该方法的方法和装置，用于在无线通信系统中自适应地分配导频信号。 该方法包括接收信道数据，包括信道长度（L）数据，载波间干扰功率（PICI）数据，相干时间（CT）数据和多个副载波（N）。 该方法还包括：当L大于第一信道长度阈值（LTH1）时，选择最小值L和最大数量导频信号NP，MAX之间的第一数量的导频信号，其中第一数量的导频信号 NP根据CT数据在时间上等间隔，频率相等。 此外，该方法包括当L小于LTH1且PICI小于功率阈值（PTH）时选择第二数量的导频信号，使得第二数量的导频信号在L和NP的最小值之间，MAX ，其中所述第二数量的导频信号根据所述CT数据在时间上等间隔，并且频率等间隔。 最后，该方法包括当L小于LTH1且PICI大于PTH时选择第三数量的导频信号，使得第三数量的导频信号等于n倍L（nL），其中n是整数， 第三数量的导频信号根据CT数据在时间上等间隔，并且根据簇大小等于n的簇（n）聚簇导频方案分配，n个大小的簇以频率聚类。

公开(公告)号：US20090092194A1

公开(公告)日：2009-04-09

申请号：US12204422

申请日：2008-09-04

申请人： Lai-Huei Wang ,  Pang-An Ting ,  Jia-Hao Wu ,  Jiun-Yo Lai

发明人： Lai-Huei Wang ,  Pang-An Ting ,  Jia-Hao Wu ,  Jiun-Yo Lai

IPC分类号： H04L27/28

CPC分类号： H04L5/0051 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/0062 ,  H04L5/0085 ,  H04L25/0216 ,  H04L25/0224

摘要： A method, and device implementing the method, for adaptively allocating pilot signals in a wireless communication system. The method includes receiving channel data, including channel length (L) data, inter-carrier interference power (PICI) data, coherence time (CT) data, and a number of subcarriers (N). The method further includes selecting, when L is greater than a first channel length threshold (LTH1), a first number of pilot signals between a minimum value of L and a maximum number of pilot signals NP,MAX, wherein the first number of pilot signals NP are equally spaced in time according to the CT data, and equally spaced in frequency. Further, the method includes selecting, when L is less than LTH1 and PICI is less than a power threshold (PTH), a second number of pilot signals such that the second number of pilot signals is between the minimum value of L and NP,MAX, wherein the second number of pilot signals are equally spaced in time according to the CT data, and equally spaced in frequency. Finally, the method includes selecting, when L is less than LTH1 and PICI is greater than PTH, a third number of pilot signals such that the third number of pilot signals is equal to n times L (nL), wherein n is an integer, the third number of pilot signals being equally spaced in time according to the CT data, and allocated according to a cluster(n) clustered pilot scheme with a cluster size equal to n, the n-sized clusters being clustered in frequency.

摘要翻译： 一种实现该方法的方法和装置，用于在无线通信系统中自适应地分配导频信号。 该方法包括接收信道数据，包括信道长度（L）数据，载波间干扰功率（PICI）数据，相干时间（CT）数据和多个副载波（N）。 该方法还包括：当L大于第一信道长度阈值（LTH1）时，选择最小值L和最大数量导频信号NP，MAX之间的第一数量的导频信号，其中第一数量的导频信号 NP根据CT数据在时间上等间隔，频率相等。 此外，该方法包括当L小于LTH1且PICI小于功率阈值（PTH）时选择第二数量的导频信号，使得第二数量的导频信号在L和NP的最小值之间，MAX ，其中所述第二数量的导频信号根据所述CT数据在时间上等间隔，并且频率等间隔。 最后，该方法包括当L小于LTH1且PICI大于PTH时选择第三数量的导频信号，使得第三数量的导频信号等于n倍L（nL），其中n是整数， 第三数量的导频信号根据CT数据在时间上等间隔，并且根据簇大小等于n的簇（n）聚簇导频方案分配，n个大小的簇以频率聚类。

公开(公告)号：US20090279623A1

公开(公告)日：2009-11-12

申请号：US12431046

申请日：2009-04-28

申请人： Jia-Hao Wu ,  Lai-Huei Wang ,  Yu-Tao Hsieh ,  Pang-An Ting

发明人： Jia-Hao Wu ,  Lai-Huei Wang ,  Yu-Tao Hsieh ,  Pang-An Ting

IPC分类号： H04J11/00 ,  H04L27/28

CPC分类号： H04L5/0048 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/023 ,  H04L27/2613

摘要： A method for generating a pilot pattern for data to be transmitted in an orthogonal frequency-division multiplexing (OFDM) based communication system includes: allocating pilot symbols for a plurality of data streams to form a plurality of pilot clusters in the pilot pattern, wherein each of the pilot clusters includes ones of the pilot symbols, the ones of the pilot symbols being for respectively different ones of the data streams.

摘要翻译： 一种用于在基于正交频分复用（OFDM）的通信系统中生成要发送的数据的导频模式的方法包括：为多个数据流分配导频符号以在导频模式中形成多个导频簇，其中每个 导频簇包括导频符号中的一个，导频符号中的一个用于分别不同的数据流。

公开(公告)号：US08488694B2

公开(公告)日：2013-07-16

申请号：US12431046

申请日：2009-04-28

申请人： Jia-Hao Wu ,  Lai-Huei Wang ,  Yu-Tao Hsieh ,  Pang-An Ting

发明人： Jia-Hao Wu ,  Lai-Huei Wang ,  Yu-Tao Hsieh ,  Pang-An Ting

IPC分类号： H04J11/00

CPC分类号： H04L5/0048 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/023 ,  H04L27/2613

摘要： A method for generating a pilot pattern for data to be transmitted in an orthogonal frequency-division multiplexing (OFDM) based communication system includes: allocating pilot symbols for a plurality of data streams to form a plurality of pilot clusters in the pilot pattern, wherein each of the pilot clusters includes ones of the pilot symbols, the ones of the pilot symbols being for respectively different ones of the data streams.

摘要翻译： 一种用于在基于正交频分复用（OFDM）的通信系统中生成要发送的数据的导频模式的方法包括：为多个数据流分配导频符号以在导频模式中形成多个导频簇，其中每个 导频簇包括导频符号中的一个，导频符号中的一个用于分别不同的数据流。

公开(公告)号：US20080153444A1

公开(公告)日：2008-06-26

申请号：US11978642

申请日：2007-10-30

申请人： Chin-Hung Chen ,  Jia-Hao Wu ,  Yung-Yih Jian ,  Pang-An Ting

发明人： Chin-Hung Chen ,  Jia-Hao Wu ,  Yung-Yih Jian ,  Pang-An Ting

IPC分类号： H04B1/16

CPC分类号： H04L1/0047

摘要： A hybrid sphere decoding method is disclosed. Received data is processed to obtain preliminary parameters. Mbf layers are determined to use breadth-first search and Mdf layers to use depth-first search. A search process is implemented based on the preliminary parameters, in which Mbf layers are searched using breadth-first search and Mdf layers are searched using depth-first search.

摘要翻译： 公开了一种混合球解码方法。 处理接收到的数据以获得初步参数。 确定层Bb层使用宽度优先搜索和M层df层以使用深度优先搜索。 基于初步参数来实现搜索过程，其中使用宽度优先搜索搜索M层bf层，并且使用深度优先搜索来搜索M层df层。

公开(公告)号：US08059753B2

公开(公告)日：2011-11-15

申请号：US11798762

申请日：2007-05-16

申请人： Yu-Tao Hsieh ,  Chao-Kai Wen ,  Jia-Hao Wu ,  Pang-An Ting

发明人： Yu-Tao Hsieh ,  Chao-Kai Wen ,  Jia-Hao Wu ,  Pang-An Ting

IPC分类号： H03K9/00 ,  H04L27/00 ,  H04L27/28

CPC分类号： H04L25/022 ,  H04L25/0222 ,  H04L25/0228 ,  H04L25/0232 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03547

摘要： An adaptive channel estimator for estimating channel frequency responses when receiving OFDM symbols. The adaptive channel estimator comprises a channel estimator and a channel tracking module. The channel estimator generates one first channel frequency response for each OFDM symbol when operated in the first mode, and generates the channel frequency responses of a second channel frequency response for every N-th OFDM symbols when operated in the second mode, wherein N is a constant integer exceeding one and j is a non-negative integer. The channel tracking module indicates a channel status, and controls the channel estimator to operate in a first mode or a second mode according to the channel status.

摘要翻译： 一种自适应信道估计器，用于在接收OFDM符号时估计信道频率响应。 自适应信道估计器包括信道估计器和信道跟踪模块。 当在第一模式下操作时，信道估计器为每个OFDM符号生成一个第一信道频率响应，并且在第二模式下操作时，为每个第N个OFDM符号产生第二信道频率响应的信道频率响应，其中N是 超过1的常数整数，j是非负整数。 信道跟踪模块指示信道状态，并且根据信道状态控制信道估计器在第一模式或第二模式中操作。

公开(公告)号：US08385442B2

公开(公告)日：2013-02-26

申请号：US12643042

申请日：2009-12-21

申请人： Jia-Hao Wu ,  Yun-Yi Shih ,  Pang-An Ting ,  Ming-Che Lin

发明人： Jia-Hao Wu ,  Yun-Yi Shih ,  Pang-An Ting ,  Ming-Che Lin

IPC分类号： H04L27/28

CPC分类号： H04L27/262

摘要： A transmitter and the method therefor are provided. The transmitter is applied in an orthogonal frequency division multiplexing (OFDM) based or other multicarrier communication systems. The transmitter uses N sub-carriers. Among the N sub-carriers, L sub-carriers (or tones) are reserved for PAPR reduction. L is less than N. The method includes the following steps. Original frequency domain data symbols are generated and fed into the reserved-tone symbol generation unit. The reserved-tone symbols are generated by using pure frequency domain signal processing. Then the reserved-tone symbols are combined with original data symbols to generate combined PAPR reduction signal. The resultant PAPR reduction signal can be fed into reserved-tone symbol generation unit iteratively to obtain updated reserved-tone symbols. For proper iterations, the original data symbols combined with L frequency domain reserved-tone symbols will result in lower PAPR transmit signal.

摘要翻译： 提供了一种发射机及其方法。 发射机应用于基于正交频分复用（OFDM）或其他多载波通信系统中。 发射机使用N个子载波。 在N个子载波中，L个子载波（或音调）被保留用于减少PAPR。 L小于N.该方法包括以下步骤。 生成原始频域数据符号并将其馈送到保留音符号生成单元。 通过使用纯频域信号处理来生成保留音符号。 然后将保留音符号与原始数据符号组合以产生组合的PAPR减少信号。 所得到的PAPR降低信号可以迭代地馈送到保留音符号生成单元中以获得更新的保留音符号。 对于正确的迭代，与L个频域保留音符号组合的原始数据符号将导致较低的PAPR发送信号。

公开(公告)号：US20110110442A1

公开(公告)日：2011-05-12

申请号：US12874758

申请日：2010-09-02

申请人： Jia-Hao Wu ,  Yu-Tao Hsien ,  Pang-An Ting

发明人： Jia-Hao Wu ,  Yu-Tao Hsien ,  Pang-An Ting

IPC分类号： H04L27/28

CPC分类号： H04L5/0048

摘要： A computer-implemented method for generating a pilot pattern for use in an orthogonal frequency-division multiplexing (OFDM) based communication system. The method includes: generating a basic resource unit to which a plurality of pilot symbols are allocated, each of the pilot symbols corresponding to a subcarrier frequency and an OFDM symbol; deriving one or more variant resource units from the basic resource unit; and combining ones of the basic resource unit and the one or more variant resource units to generate a resource block including the pilot pattern.

摘要翻译： 一种用于生成用于在基于正交频分复用（OFDM）的通信系统中使用的导频模式的计算机实现的方法。 该方法包括：生成分配了多个导频符号的基本资源单元，对应于子载波频率的每个导频符号和OFDM符号; 从所述基本资源单元导出一个或多个变体资源单元; 以及组合所述基本资源单元和所述一个或多个变体资源单元中的一个，以生成包括所述导频模式的资源块。

公开(公告)号：US20100166105A1

公开(公告)日：2010-07-01

申请号：US12643042

申请日：2009-12-21

申请人： Jia-Hao Wu ,  Yun-Yi Shih ,  Pang-An Ting ,  Ming-Che Lin

发明人： Jia-Hao Wu ,  Yun-Yi Shih ,  Pang-An Ting ,  Ming-Che Lin

IPC分类号： H04L27/00

CPC分类号： H04L27/262

摘要： A transmitter and the method therefor are provided. The transmitter is applied in an orthogonal frequency division multiplexing (OFDM) based or other multicarrier communication systems. The transmitter uses N sub-carriers. Among the N sub-carriers, L sub-carriers (or tones) are reserved for PAPR reduction. L is less than N. The method includes the following steps. Original frequency domain data symbols are generated and fed into the reserved-tone symbol generation unit. The reserved-tone symbols are generated by using pure frequency domain signal processing. Then the reserved-tone symbols are combined with original data symbols to generate combined PAPR reduction signal. The resultant PAPR reduction signal can be fed into reserved-tone symbol generation unit iteratively to obtain updated reserved-tone symbols. For proper iterations, the original data symbols combined with L frequency domain reserved-tone symbols will result in lower PAPR transmit signal.

摘要翻译： 提供了一种发射机及其方法。 发射机应用于基于正交频分复用（OFDM）或其他多载波通信系统中。 发射机使用N个子载波。 在N个子载波中，L个子载波（或音调）被保留用于减少PAPR。 L小于N.该方法包括以下步骤。 生成原始频域数据符号并将其馈送到保留音符号生成单元。 通过使用纯频域信号处理产生保留音符号。 然后将保留音符号与原始数据符号组合以产生组合的PAPR减少信号。 所得到的PAPR降低信号可以迭代地馈送到保留音符号生成单元中以获得更新的保留音符号。 对于正确的迭代，与L个频域保留音符号组合的原始数据符号将导致较低的PAPR发送信号。

公开(公告)号：US08132065B2

公开(公告)日：2012-03-06

申请号：US11978642

申请日：2007-10-30

申请人： Chin-Hung Chen ,  Jia-Hao Wu ,  Yung-Yih Jian ,  Pang-An Ting

发明人： Chin-Hung Chen ,  Jia-Hao Wu ,  Yung-Yih Jian ,  Pang-An Ting

IPC分类号： G06F11/00

CPC分类号： H04L1/0047

摘要： A hybrid sphere decoding method is disclosed. Received data is processed to obtain preliminary parameters. Mbf layers are determined to use breadth-first search and Mdf layers to use depth-first search. A search process is implemented based on the preliminary parameters, in which Mbf layers are searched using breadth-first search and Mdf layers are searched using depth-first search.

摘要翻译： 公开了一种混合球解码方法。 处理接收到的数据以获得初步参数。 确定Mbf层使用宽度优先搜索和Mdf层来使用深度优先搜索。 基于初步参数实现搜索过程，其中使用宽度优先搜索搜索Mbf层并且使用深度优先搜索来搜索Mdf层。