公开(公告)号：US07583738B2

公开(公告)日：2009-09-01

申请号：US11111217

申请日：2005-04-21

申请人： Sung-Ryul Yun ,  Sung-Eun Park ,  Jae-Yoel Kim

发明人： Sung-Ryul Yun ,  Sung-Eun Park ,  Jae-Yoel Kim

IPC分类号： H04K1/10

CPC分类号： H04L27/2618

摘要： Provided is a method for reducing a PAPR (Peak-to-Average Power Ratio) of a transmit signal in a broadband wireless communication. The method includes the steps of: assigning information signals to remaining tones except L reserved tones that are previously appointed among N tones, and performing an IFFT operation on the tones; detecting peaks that are greater than a predefined reference value from the IFFT-ed signal; generating signals for removing the detected peaks using P-waveform having impulse characteristic, the P-waveform being produced using the L reserved tones; generating a clipping signal by accumulating the signals; and simultaneously removing the peaks by adding the IFFT-ed signal and the clipping signal.

摘要翻译： 提供了一种用于降低宽带无线通信中的发送信号的PAPR（峰均功率比）的方法。 该方法包括以下步骤：将信息信号分配给除N个音调之前预先指定的L个保留音之外的剩余音调，并对该音调执行IFFT操作; 检测大于来自IFFT-ed信号的预定参考值的峰值; 产生用于使用具有脉冲特性的P波形去除检测到的峰值的信号，该P波形使用L个保留音产生; 通过累积信号产生限幅信号; 并通过加入IFFT-ed信号和限幅信号同时去除峰。

公开(公告)号：US07535860B2

公开(公告)日：2009-05-19

申请号：US11073455

申请日：2005-03-07

申请人： Sung-Eun Park ,  Seung-Hoon Choi ,  Dong-Seek Park ,  Jae-Yoel Kim ,  Sung-Ryul Yun ,  Sie-Joon Cho ,  Jae-Weon Cho ,  Chi-Woo Lim

发明人： Sung-Eun Park ,  Seung-Hoon Choi ,  Dong-Seek Park ,  Jae-Yoel Kim ,  Sung-Ryul Yun ,  Sie-Joon Cho ,  Jae-Weon Cho ,  Chi-Woo Lim

IPC分类号： H04B7/00 ,  H04J9/00

CPC分类号： H04L5/0048 ,  H04L5/0007 ,  H04L27/2613 ,  H04L27/2618 ,  H04L27/262

摘要： Disclosed is a method for transmitting a pilot symbol from base stations (BSs) to a subscriber station (SS) in a communication system which includes the base stations located adjacent to each other, the method includes the steps of transmitting BS-identifying sub-carriers which represent sequences for identifying the base stations in a frequency domain of the pilot symbol; and transmitting PAPR (Peak to Average Power Ratio) sub-carriers which represent sequences for reducing a PAPR of the pilot symbol together with the transmission of the BS-identifying sub-carriers in the frequency domain.

摘要翻译： 公开了一种用于在包括彼此相邻的基站的通信系统中从基站（BS）向用户站（SS）发送导频符号的方法，所述方法包括以下步骤：发送BS识别子载波 其表示用于识别导频符号的频域中的基站的序列; 并且发送表示用于减少导频符号的PAPR的序列的PAPR（峰均功率比），以及频域中的BS识别子载波的传输。

公开(公告)号：US20050100108A1

公开(公告)日：2005-05-12

申请号：US10937241

申请日：2004-09-09

申请人： Sung-Ryul Yun ,  Sung-Eun Park ,  Jae-Yoel Kim

发明人： Sung-Ryul Yun ,  Sung-Eun Park ,  Jae-Yoel Kim

IPC分类号： H04J11/00 ,  H04L27/26

CPC分类号： H04L27/2618

摘要： A method for reducing a peak-to-average power ratio (PAPR) in an orthogonal frequency division multiplexing (OFDM) communication system including N carriers, among which L carriers are allocated to L reserved tones and data are carried by (N-L) remaining tones, wherein L is smaller than N, including generating an impulse signal from the L reserved tones; converting a phase of the generated impulse signal into a phase of a signal having a maximum peak value from among complex output signals obtained though inverse fast Fourier transform (IFFT) of the N carriers; scaling the generated impulse signal by the difference between the maximum peak value and a target power value; and complex-adding the scaled signal and the complex output signal after IFFT.

摘要翻译： 一种用于降低包括N个载波的正交频分复用（OFDM）通信系统中的峰值与平均功率比（PAPR）的方法，其中将L个载波分配给L个保留音和数据由（NL）个剩余音调 其中L小于N，包括从L个保留音产生脉冲信号; 将所产生的脉冲信号的相位从通过N个载波的快速傅里叶逆变换（IFFT）获得的复合输出信号中转换为具有最大峰值的信号的相位; 通过最大峰值与目标功率值之间的差来缩放产生的脉冲信号; 并在IFFT之后复合加上缩放的信号和复合输出信号。

公开(公告)号：US20050238110A1

公开(公告)日：2005-10-27

申请号：US11111217

申请日：2005-04-21

申请人： Sung-Ryul Yun ,  Sung-Eun Park ,  Jae-Yoel Kim

发明人： Sung-Ryul Yun ,  Sung-Eun Park ,  Jae-Yoel Kim

IPC分类号： H04J11/00 ,  H04K1/10 ,  H04L27/26

CPC分类号： H04L27/2618

摘要： Provided is a method for reducing a PAPR (Peak-to-Average Power Ratio) of a transmit signal in a broadband wireless communication. The method includes the steps of: assigning information signals to remaining tones except L reserved tones that are previously appointed among N tones, and performing an IFFT operation on the tones; detecting peaks that are greater than a predefined reference value from the IFFT-ed signal; generating signals for removing the detected peaks using P-waveform having impulse characteristic, the P-waveform being produced using the L reserved tones; generating a clipping signal by accumulating the signals; and simultaneously removing the peaks by adding the IFFT-ed signal and the clipping signal.

摘要翻译： 提供了一种用于降低宽带无线通信中的发送信号的PAPR（峰均功率比）的方法。 该方法包括以下步骤：将信息信号分配给除N个音调之前预先指定的L个保留音之外的剩余音调，并对该音调执行IFFT操作; 检测大于来自IFFT-ed信号的预定参考值的峰值; 产生用于使用具有脉冲特性的P波形去除检测到的峰值的信号，该P波形使用L个保留音产生; 通过累积信号产生限幅信号; 并通过加入IFFT-ed信号和限幅信号同时去除峰。

公开(公告)号：US07340006B2

公开(公告)日：2008-03-04

申请号：US10937241

申请日：2004-09-09

申请人： Sung-Ryul Yun ,  Sung-Eun Park ,  Jae-Yoel Kim

发明人： Sung-Ryul Yun ,  Sung-Eun Park ,  Jae-Yoel Kim

IPC分类号： H04K1/02

CPC分类号： H04L27/2618

摘要： A method for reducing a peak-to-average power ratio (PAPR) in an orthogonal frequency division multiplexing (OFDM) communication system including N carriers, among which L carriers are allocated to L reserved tones and data are carried by (N-L) remaining tones, wherein L is smaller than N, including generating an impulse signal from the L reserved tones; converting a phase of the generated impulse signal into a phase of a signal having a maximum peak value from among complex output signals obtained though inverse fast Fourier transform (IFFT) of the N carriers; scaling the generated impulse signal by the difference between the maximum peak value and a target power value; and complex-adding the scaled signal and the complex output signal after IFFT.

摘要翻译： 一种用于降低包括N个载波的正交频分复用（OFDM）通信系统中的峰值与平均功率比（PAPR）的方法，其中将L个载波分配给L个保留音和数据由（NL）个剩余音调 其中L小于N，包括从L个保留音产生脉冲信号; 将所产生的脉冲信号的相位从通过N个载波的快速傅里叶逆变换（IFFT）获得的复合输出信号中转换为具有最大峰值的信号的相位; 通过最大峰值与目标功率值之间的差来缩放产生的脉冲信号; 并在IFFT之后复合加上缩放的信号和复合输出信号。

公开(公告)号：US20060007850A1

公开(公告)日：2006-01-12

申请号：US11073455

申请日：2005-03-07

申请人： Sung-Eun Park ,  Seung-Hoon Choi ,  Dong-Seek Park ,  Jae-Yoel Kim ,  Sung-Ryul Yun ,  Sie-Joon Cho ,  Jae-Weon Cho ,  Chi-Woo Lim

发明人： Sung-Eun Park ,  Seung-Hoon Choi ,  Dong-Seek Park ,  Jae-Yoel Kim ,  Sung-Ryul Yun ,  Sie-Joon Cho ,  Jae-Weon Cho ,  Chi-Woo Lim

IPC分类号： H04J11/00

CPC分类号： H04L5/0048 ,  H04L5/0007 ,  H04L27/2613 ,  H04L27/2618 ,  H04L27/262

摘要： Disclosed is a method for transmitting a pilot symbol from base stations (BSs) to a subscriber station (SS) in a communication system which includes the base stations located adjacent to each other, the method includes the steps of transmitting BS-identifying sub-carriers which represent sequences for identifying the base stations in a frequency domain of the pilot symbol; and transmitting PAPR (Peak to Average Power Ratio) sub-carriers which represent sequences for reducing a PAPR of the pilot symbol together with the transmission of the BS-identifying sub-carriers in the frequency domain.

公开(公告)号：US20050089109A1

公开(公告)日：2005-04-28

申请号：US10974124

申请日：2004-10-27

申请人： Sung-Ryul Yun ,  Sung-Eun Park ,  Jae-Yoel Kim

发明人： Sung-Ryul Yun ,  Sung-Eun Park ,  Jae-Yoel Kim

IPC分类号： H04J11/00 ,  H04K1/10 ,  H04L27/26

CPC分类号： H04L27/2618

摘要： A method and apparatus for generating an impulsive wave in an OFDM communication system where L subcarriers are allocated to reserved tone locations among N subcarriers and data is carried on (N-L) subcarriers (L is less than N). In the method, a predetermined number of random sets each having L tone locations are created. Subcarriers are allocated to the L tone locations of each of the random sets without overlapping and IFFT-processed. A secondary peak value of the IFFT signal is stored. Tone location information having a lower secondary peak value than the stored secondary peak value is detected by fixing (L-1) tone locations and substituting subcarriers other than the subcarriers at the (L-1) tone locations one by one for the remaining one tone location. The tone location information is stored.

摘要翻译： 在N个子载波中分配给保留音调位置的L个子载波和数据的（N-L）个子载波（L小于N）的OFDM通信系统中产生脉冲波的方法和装置。 在该方法中，创建了具有L个音调位置的预定数量的随机集合。 子载波被分配给每个随机集合的L个音调位置，而不重叠和IFFT处理。 存储IFFT信号的次峰值。 通过固定（L-1）音调位置并且将剩余的一个音调逐个地替换（L-1）音调位置处的副载波以外的副载波来检测具有比存储的辅助峰值低的次峰值的音调位置信息 位置。 存储音调位置信息。

公开(公告)号：US20080167061A1

公开(公告)日：2008-07-10

申请号：US11985325

申请日：2007-11-14

申请人： David Mazzarese ,  Hak-Ju Lee ,  Sung-Ryul Yun ,  Dong-Seek Park

发明人： David Mazzarese ,  Hak-Ju Lee ,  Sung-Ryul Yun ,  Dong-Seek Park

IPC分类号： H04B7/00

CPC分类号： H04B7/0452 ,  H04L5/0007 ,  H04L5/005 ,  H04L27/2647

摘要： An apparatus and method for transmitting and receiving a signal and a subcarrier allocation structure therefor in a multi-user multi-antenna communication system are provided, in which a transmitter calculates receive filters for each of a plurality of receivers or for a plurality of antennas in a receiver, determines the index of a vector having a correlation with the calculated receive filters in a preset codebook vector to be a receive filter index, and transmits the receive filter index to the receiver

摘要翻译： 提供了一种用于在多用户多天线通信系统中发送和接收信号及其子载波分配结构的装置和方法，其中发射机针对多用户多天线通信系统中的每一个接收机或多个天线 接收机确定具有与预设码本向量中的计算的接收滤波器相关的矢量的索引为接收滤波器索引，并将接收滤波器索引发送到接收机

公开(公告)号：US08634867B2

公开(公告)日：2014-01-21

申请号：US11985325

申请日：2007-11-14

申请人： David Mazzarese ,  Hak-Ju Lee ,  Sung-Ryul Yun ,  Dong-Seek Park

发明人： David Mazzarese ,  Hak-Ju Lee ,  Sung-Ryul Yun ,  Dong-Seek Park

IPC分类号： H04M1/00

CPC分类号： H04B7/0452 ,  H04L5/0007 ,  H04L5/005 ,  H04L27/2647

摘要： An apparatus and method for transmitting and receiving a signal and a subcarrier allocation structure therefor in a multi-user multi-antenna communication system are provided, in which a transmitter calculates receive filters for each of a plurality of receivers or for a plurality of antennas in a receiver, determines the index of a vector having a correlation with the calculated receive filters in a preset codebook vector to be a receive filter index, and transmits the receive filter index to the receiver.

摘要翻译： 提供了一种用于在多用户多天线通信系统中发送和接收信号及其子载波分配结构的装置和方法，其中发射机针对多用户多天线通信系统中的每一个接收机或多个天线 接收机确定具有与预设码本矢量中的计算出的接收滤波器相关的矢量的索引为接收滤波器索引，并将接收滤波器索引发送给接收机。

公开(公告)号：US20070211823A1

公开(公告)日：2007-09-13

申请号：US11709339

申请日：2007-02-21

申请人： David Mazzarese ,  Sung-Ryul Yun ,  Dong-Seek Park

发明人： David Mazzarese ,  Sung-Ryul Yun ,  Dong-Seek Park

IPC分类号： H04L27/00 ,  H04L1/02

CPC分类号： H04B7/0452 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04W52/42

摘要： An apparatus and method for transmission and reception in a multi-user Multiple-Input Multiple-Output (MIMO) communication system are provided. In a transmitter, a filter portion receives quantized Channel State Information (CSI) and Channel Quality Information (CQI) from a receiver, calculates a transmit filter value using on the quantized CSI and the CQI, determines an appropriate AMC level for the receiver, and sends a pilot signal including the transmit filter value and information about the determined AMC level on subcarriers in one of a preamble and data symbols. An antenna is used to send the output of the filter portion and receives data from the receiver.

摘要翻译： 提供了一种用于多用户多输入多输出（MIMO）通信系统中的发送和接收的装置和方法。 在发射机中，滤波器部分从接收机接收量化的信道状态信息（CSI）和信道质量信息（CQI），使用量化的CSI和CQI来计算发射滤波器值，确定接收机的合适的AMC电平， 在前导码和数据符号之一的子载波上发送包括发送滤波器值和关于所确定的AMC电平的信息的导频信号。 天线用于发送滤波器部分的输出并从接收器接收数据。