公开(公告)号：US07450658B2

公开(公告)日：2008-11-11

申请号：US11882483

申请日：2007-08-02

Applicant: Jiann-An Tsai ,  Shih-Kai Lee ,  Chang-Lung Hsiao

Inventor： Jiann-An Tsai ,  Shih-Kai Lee ,  Chang-Lung Hsiao

IPC: H04L7/02

CPC classification number: H04L5/0026 ,  H04B7/0669 ,  H04B7/0671 ,  H04B7/0837 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2647

Abstract: At the transmitter of a transmitter and receiver apparatus for Multiple Input/Multiple Output MultiCarrier-Code Division Multiple Access (MIMO MC-CDMA) systems, modified orthogonal transmit diversity (MOTD) encoders are used for increasing space and time transmission diversity. A P-way combiner is used to connect the MOTD encoders and P multi-carrier modulators. Each modulator is connected to a set of antennas. At the receiver, each multi-carrier demodulator has an amplitude/phase compensator to compensate distortion at every sub-carrier. Similarly, a combiner is used to connect the demodulators and the MOTD decoders. As a result, space, time, and frequency diversity can be explored.

Abstract translation: 在用于多输入/多输出多载波码分多址（MIMO MC-CDMA）系统的发射机和接收机装置的发射机上，使用修改的正交发射分集（MOTD）编码器来增加空间和时间传输分集。 P路组合器用于连接MOTD编码器和P多载波调制器。 每个调制器连接到一组天线。 在接收机处，每个多载波解调器具有幅度/相位补偿器，用于补偿每个子载波的失真。 类似地，组合器用于连接解调器和MOTD解码器。 因此，可以探索空间，时间和频率多样性。

公开(公告)号：US20080037682A1

公开(公告)日：2008-02-14

申请号：US11882483

申请日：2007-08-02

Applicant: Jiann-An Tsai ,  Shih-Kai Lee ,  Chang-Lung Hsiao

Inventor： Jiann-An Tsai ,  Shih-Kai Lee ,  Chang-Lung Hsiao

IPC: H04B7/02

CPC classification number: H04L5/0026 ,  H04B7/0669 ,  H04B7/0671 ,  H04B7/0837 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2647

Abstract: The invention relates to an apparatus of transmitter and receiver for MIMO MC-CDMA systems. At the transmitter, modified orthogonal transmit diversity (MOTD) encoders are used for increasing space and time transmission diversity. A P-way combiner is used to connect the MOTD encoders and P multi-carrier modulators. Each modulator is connected to a set of antennas. At the receiver, each multi-carrier demodulator has an amplitude/phase compensator to compensate distortion at every sub-carrier. Similarly, a combiner is used to connect the demodulators and the MOTD decoders. Upon the invention, the space, time, and frequency diversity can be explored.

Abstract translation: 本发明涉及用于MIMO MC-CDMA系统的发射机和接收机的装置。 在发射机处，使用修正的正交发射分集（MOTD）编码器来增加空间和时间的传输分集。 P路组合器用于连接MOTD编码器和P多载波调制器。 每个调制器连接到一组天线。 在接收机处，每个多载波解调器具有幅度/相位补偿器，用于补偿每个子载波的失真。 类似地，组合器用于连接解调器和MOTD解码器。 根据本发明，可以探索空间，时间和频率多样性。

公开(公告)号：US07313195B2

公开(公告)日：2007-12-25

申请号：US10773179

申请日：2004-02-09

Applicant: Yen-lun Chen ,  Yumin Lee ,  Shih-Kai Lee

Inventor： Yen-lun Chen ,  Yumin Lee ,  Shih-Kai Lee

IPC: H04K1/02

CPC classification number: H04L27/2614 ,  H04L27/2608

Abstract: A PAPR reduction method using bit reallocation is disclosed, which is applied in a multi-carrier system. The lowest total transmission power P is achieved by a bit loading algorithm conditioned on the requirement of total D transmission bits per block. When the PAPR (peak to average power ratio) of the block is larger than a predetermined value A, the bit reallocation is performed to add Δd-bit transmitting data to one sub-carrier and subtract Δd-bit transmitting data from another sub-carrier, thereby continuing bit reallocation until the PAPR meets with the system requirement or an iteration number reaches a predetermined maximal number of iteration L.

Abstract translation: 公开了一种使用位重新分配的PAPR缩减方法，其应用于多载波系统中。 最低总传输功率P通过位加载算法来实现，该算法以每块的总D传输比特的要求为条件。 当块的PAPR（峰值与平均功率比）大于预定值A时，执行位重新分配，以将Deltad-bit发送数据添加到一个副载波，并从另一个副载波中减去Deltad-bit发送数据 从而继续比特重新分配，直到PAPR满足系统要求或迭代次数达到预定的最大迭代次数L.

公开(公告)号：US20050018702A1

公开(公告)日：2005-01-27

申请号：US10773179

申请日：2004-02-09

Applicant: Yen-Iun Chen ,  Yumin Lee ,  Shih-Kai Lee

Inventor： Yen-Iun Chen ,  Yumin Lee ,  Shih-Kai Lee

IPC: H04B7/005 ,  H04L12/28 ,  H04L27/26

CPC classification number: H04L27/2614 ,  H04L27/2608

Abstract: A PAPR reduction method using bit reallocation is disclosed, which is applied in a multi-carrier system. The lowest total transmission power P is achieved by a bit loading algorithm conditioned on the requirement of total D transmission bits per block. When the PAPR (peak to average power ratio) of the block is larger than a predetermined value A, the bit reallocation is performed to add Δd-bit transmitting data to one sub-carrier and subtract Δd-bit transmitting data from another sub-carrier, thereby continuing bit reallocation until the PAPR meets with the system requirement or an iteration number reaches a predetermined maximal number of iteration L.

Abstract translation: 公开了一种使用位重新分配的PAPR缩减方法，其应用于多载波系统中。 最低总传输功率P通过位加载算法来实现，该算法以每块的总D传输比特的要求为条件。 当块的PAPR（峰值与平均功率比）大于预定值A时，执行位重新分配，以将Deltad-bit发送数据添加到一个副载波，并从另一个副载波中减去Deltad-bit发送数据 从而继续比特重新分配，直到PAPR满足系统要求或迭代次数达到预定的最大迭代次数L.

公开(公告)号：US07321550B2

公开(公告)日：2008-01-22

申请号：US10778087

申请日：2004-02-17

Applicant: Yung-An Kao ,  Chang-Lung Hsiao ,  Po-Lin Chiu ,  Shih-Kai Lee

Inventor： Yung-An Kao ,  Chang-Lung Hsiao ,  Po-Lin Chiu ,  Shih-Kai Lee

IPC: H04J11/00

CPC classification number: H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03522

Abstract: An equalization method suitable for use in a receiver in an orthogonal frequency division multiplexing (OFDM) system utilizing a plurality of sub-carriers. The receiver includes an outer receiver for decoding. The equalization method includes receiving an input signal including at least one preamble symbol containing a training sequence and a plurality of informative OFDM symbols each containing a serial stream of samples, and performing compensations for each of the informative OFDM symbols. Compensation for each of the informative OFDM symbols includes converting the serial stream of samples into parallel samples, performing a fast Fourier transform (FFT) of the parallel samples to obtain a plurality of data symbols, each data symbol corresponding to a sub-carrier, compensating the data symbols for at least one first phase distortion and at least one second phase distortion, and providing at least one amplitude distortion factor to the outer receiver.

Abstract translation: 一种适用于使用多个子载波的正交频分复用（OFDM）系统中的接收机中的均衡方法。 接收机包括用于解码的外部接收机。 所述均衡方法包括：接收包括包含训练序列的至少一个前导码符号的输入信号和包含串行串流样本的多个信息OFDM符号，以及对每个信息OFDM符号执行补偿。 每个信息OFDM符号的补偿包括将样本的串行流转换为并行采样，执行并行采样的快速傅里叶变换（FFT）以获得多个数据符号，每个数据符号对应于子载波，补偿 所述数据符号用于至少一个第一相位失真和至少一个第二相位失真，并且向所述外部接收器提供至少一个幅度失真因子。

公开(公告)号：US07330513B2

公开(公告)日：2008-02-12

申请号：US10868804

申请日：2004-06-17

Applicant: Jiann-An Tsai ,  Shih-Kai Lee ,  Chang-Lung Hsiao

Inventor： Jiann-An Tsai ,  Shih-Kai Lee ,  Chang-Lung Hsiao

IPC: H04K1/10

CPC classification number: H04L5/0026 ,  H04B7/0669 ,  H04B7/0671 ,  H04B7/0837 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2647

Abstract: The invention relates to an apparatus of transmitter and receiver for Multiple Input/Multiple Output MultiCarrier-Code Division Multiple Access (MIMO MC-CDMA) systems. At the transmitter, modified orthogonal transmit diversity (MOTD) encoders are used for increasing space and time transmission diversity. A P-way combiner is used to connect the MOTD encoders and P multi-carrier modulators. Each modulator is connected to a set of antennas. At the receiver, each multi-carrier demodulator has an amplitude/phase compensator to compensate distortion at every sub-carrier. Similarly, a combiner is used to connect the demodulators and the MOTD decoders. Upon the invention, the space, time, and frequency diversity can be explored.

Abstract translation: 本发明涉及用于多输入/多输出多载波码分多址（MIMO MC-CDMA）系统的发射机和接收机的装置。 在发射机处，使用修正的正交发射分集（MOTD）编码器来增加空间和时间的传输分集。 P路组合器用于连接MOTD编码器和P多载波调制器。 每个调制器连接到一组天线。 在接收机处，每个多载波解调器具有幅度/相位补偿器，用于补偿每个子载波的失真。 类似地，组合器用于连接解调器和MOTD解码器。 根据本发明，可以探索空间，时间和频率多样性。

公开(公告)号：US20050265224A1

公开(公告)日：2005-12-01

申请号：US10995466

申请日：2004-11-24

Applicant: Shih-Kai Lee ,  Po-Lin Chiu ,  Chang-Lung Hsiao ,  Jiann-An Tsai

Inventor： Shih-Kai Lee ,  Po-Lin Chiu ,  Chang-Lung Hsiao ,  Jiann-An Tsai

IPC: H04B1/69 ,  H04B1/707 ,  H04B1/713 ,  H04J11/00

CPC classification number: H04J13/12 ,  H04J13/0044

Abstract: An apparatus for generating a 2D spreading code and method for the same are proposed. The apparatus for generating the 2D spreading code includes a column counter, a row counter, a codeword selector, and a logic unit. The logic unit performs logic operations on the output of the column counter, the row counter, and the codeword selector to generate the 2D spreading code of desired order designated by the codeword selector. The 2D spreading code includes 4 2×2 initial matrixes for generating 4i codes for 4i users in the ith order. The apparatus for generating the 2D spreading code according to the present invention is advantageously used in OFDM system to increase the number of subscribers with reduced interference.

Abstract translation: 提出了一种用于生成2D扩展码的装置及其方法。 用于生成2D扩展码的装置包括列计数器，行计数器，码字选择器和逻辑单元。 逻辑单元对列计数器，行计数器和码字选择器的输出执行逻辑运算，以产生由码字选择器指定的期望顺序的2D扩展码。 2D扩展码包括4×2×2个初始矩阵，用于按照第i个顺序为4位用户生成4位代码。 根据本发明的用于生成2D扩展码的装置在OFDM系统中有利地用于增加具有减小的干扰的用户数量。

公开(公告)号：US07586835B2

公开(公告)日：2009-09-08

申请号：US10995466

申请日：2004-11-24

Applicant: Shih-Kai Lee ,  Po-Lin Chiu ,  Chang-Lung Hsiao ,  Jiann-An Tsai

Inventor： Shih-Kai Lee ,  Po-Lin Chiu ,  Chang-Lung Hsiao ,  Jiann-An Tsai

IPC: G04B5/24

CPC classification number: H04J13/12 ,  H04J13/0044

Abstract: An apparatus for generating a 2D spreading code and method for the same are proposed. The apparatus for generating the 2D spreading code includes a column counter, a row counter, a codeword selector, and a logic unit. The logic unit performs logic operations on the output of the column counter, the row counter, and the codeword selector to generate the 2D spreading code of desired order designated by the codeword selector. The 2D spreading code includes 4 2×2 initial matrixes for generating 4i codes for 4i users in the ith order. The apparatus for generating the 2D spreading code according to the present invention is advantageously used in OFDM system to increase the number of subscribers with reduced interference.

Abstract translation: 提出了一种用于生成2D扩展码的装置及其方法。 用于生成2D扩展码的装置包括列计数器，行计数器，码字选择器和逻辑单元。 逻辑单元对列计数器，行计数器和码字选择器的输出执行逻辑运算，以生成由码字选择器指定的期望顺序的2D扩展码。 2D扩展码包括4个2x2初始矩阵，用于以第i个顺序为4i个用户生成4i码。 根据本发明的用于生成2D扩展码的装置在OFDM系统中有利地用于增加具有减小的干扰的用户数量。

公开(公告)号：US20050180461A1

公开(公告)日：2005-08-18

申请号：US10778087

申请日：2004-02-17

Applicant: Yung-An Kao ,  Chang-Lung Hsiao ,  Po-Lin Chiu ,  Shih-Kai Lee

Inventor： Yung-An Kao ,  Chang-Lung Hsiao ,  Po-Lin Chiu ,  Shih-Kai Lee

IPC: H04J11/00 ,  H04L25/03

CPC classification number: H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03522

Abstract: An equalization method suitable for use in a receiver in an orthogonal frequency division multiplexing (OFDM) system utilizing a plurality of sub-carriers. The receiver includes an outer receiver for decoding. The equalization method includes receiving an input signal including at least one preamble symbol containing a training sequence and a plurality of informative OFDM symbols each containing a serial stream of samples, and performing compensations for each of the informative OFDM symbols. Compensation for each of the informative OFDM symbols includes converting the serial stream of samples into parallel samples, performing a fast Fourier transform (FFT) of the parallel samples to obtain a plurality of data symbols, each data symbol corresponding to a sub-carrier, compensating the data symbols for at least one first phase distortion and at least one second phase distortion, and providing at least one amplitude distortion factor to the outer receiver.

Abstract translation: 一种适用于使用多个子载波的正交频分复用（OFDM）系统中的接收机中的均衡方法。 接收机包括用于解码的外部接收机。 所述均衡方法包括：接收包括包含训练序列的至少一个前导码符号的输入信号和包含串行串流样本的多个信息OFDM符号，以及对每个信息OFDM符号执行补偿。 每个信息OFDM符号的补偿包括将样本的串行流转换为并行采样，执行并行采样的快速傅里叶变换（FFT）以获得多个数据符号，每个数据符号对应于子载波，补偿 所述数据符号用于至少一个第一相位失真和至少一个第二相位失真，并且向所述外部接收器提供至少一个幅度失真因子。

公开(公告)号：US20050111424A1

公开(公告)日：2005-05-26

申请号：US10868804

申请日：2004-06-17

Applicant: Jiann-An Tsai ,  Shih-Kai Lee ,  Chang-Lung Hsiao

Inventor： Jiann-An Tsai ,  Shih-Kai Lee ,  Chang-Lung Hsiao

IPC: H04B1/69 ,  H04B7/06 ,  H04B7/08 ,  H04B7/216 ,  H04L5/02 ,  H04L27/26

CPC classification number: H04L5/0026 ,  H04B7/0669 ,  H04B7/0671 ,  H04B7/0837 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2647

Abstract: The invention relates to an apparatus of transmitter and receiver for MIMO MC-CDMA systems. At the transmitter, modified orthogonal transmit diversity (MOTD) encoders are used for increasing space and time transmission diversity. A P-way combiner is used to connect the MOTD encoders and P multi-carrier modulators. Each modulator is connected to a set of antennas. At the receiver, each multi-carrier demodulator has an amplitude/phase compensator to compensate distortion at every sub-carrier. Similarly, a combiner is used to connect the demodulators and the MOTD decoders. Upon the invention, the space, time, and frequency diversity can be explored.

Abstract translation: 本发明涉及用于MIMO MC-CDMA系统的发射机和接收机的装置。 在发射机处，使用修正的正交发射分集（MOTD）编码器来增加空间和时间的传输分集。 P路组合器用于连接MOTD编码器和P多载波调制器。 每个调制器连接到一组天线。 在接收机处，每个多载波解调器具有幅度/相位补偿器，用于补偿每个子载波的失真。 类似地，组合器用于连接解调器和MOTD解码器。 根据本发明，可以探索空间，时间和频率多样性。