公开(公告)号：US20080298511A1

公开(公告)日：2008-12-04

申请号：US12093614

申请日：2006-07-13

Applicant: Sun-Heui Ryoo ,  Kun-Seok Kang ,  Do-Seob Ahn

Inventor： Sun-Heui Ryoo ,  Kun-Seok Kang ,  Do-Seob Ahn

IPC: H04L27/06

CPC classification number: H04L27/233 ,  H03M13/25 ,  H04L25/067 ,  H04L27/3854

Abstract: Provided is a soft-output demodulation apparatus and method having a relatively low complexity and capable of acquiring a channel reliability value to be inputted to an iterative decoder, in a digital communication system. The apparatus includes: a storage unit for pre-determining and storing opposite-bit nearest constellation points corresponding to constellation points by dividing a constellation point region according to a modulation scheme; a quantizer for quantizing a channel reception signal; a region decider for deciding the nearest constellation point corresponding to the quantized channel reception signal; a reverse constellation point detector for detecting an opposite-bit nearest constellation point corresponding to the decided nearest constellation point from the values pre-stored in the storage unit; and a soft-output demodulation value calculator for calculating a soft-output demodulation value based on the nearest constellation point, the nearest constellation point of the opposite bit, and the channel reception signal.

Abstract translation: 提供了一种在数字通信系统中具有相对低的复杂度并且能够获取要输入到迭代解码器的信道可靠性值的软输出解调设备和方法。 该装置包括：存储单元，用于通过根据调制方案划分星座点区域来预先确定和存储对应于星座点的对位最近的星座点; 用于量化频道接收信号的量化器; 区域决定器，用于决定与量化信道接收信号对应的最近的星座点; 反向星座点检测器，用于从预先存储在存储单元中的值检测对应于所确定的最近星座点的相对位最近星座点; 以及软输出解调值计算器，用于基于最近的星座点，相对位的最近星座点和信道接收信号来计算软输出解调值。

公开(公告)号：US20080317143A1

公开(公告)日：2008-12-25

申请号：US12094282

申请日：2006-12-07

Applicant: Sun-Heui Ryoo ,  Kwon-Hue Choi ,  Do-Seob Ahn

Inventor： Sun-Heui Ryoo ,  Kwon-Hue Choi ,  Do-Seob Ahn

IPC: H04L27/28

CPC classification number: H04L27/2679 ,  H04L25/0202 ,  H04L27/266

Abstract: Provided is an iterative residual frequency and phase compensation apparatus for an OFDM system and a method thereof. The apparatus includes: a first classifying unit for classifying symbol sequences by each subcarrier wave; a soft-decision calculating unit for calculating a soft-decision value of a data symbol using a soft-decision reliability obtained from iterative decoding performed by the iterative decoder; a classifying unit for classifying the soft-decision values by a carrier wave; a frequency estimating unit for estimating a residual frequency error of each carrier wave using the soft-decision value; a phase estimating unit for estimating an average residual phase error using the soft-decision value; a frequency and phase compensating unit for compensating frequencies and phases for input symbols of each carrier wave using the estimated frequency error and the estimated phase error; and a buffer for temporally storing the compensated symbols to provide it to the first classifying unit.

Abstract translation: 提供了一种用于OFDM系统的迭代残余频率和相位补偿装置及其方法。 该装置包括：第一分类单元，用于通过每个子载波分类符号序列; 软判决计算单元，用于使用由迭代解码器执行的迭代解码获得的软判决可靠性来计算数据符号的软判决值; 分类单元，用于通过载波对软判决值进行分类; 频率估计单元，用于使用所述软判决值估计每个载波的残余频率误差; 相位估计单元，用于使用所述软判决值来估计平均残留相位误差; 频率和相位补偿单元，用于使用估计的频率误差和估计的相位误差来补偿每个载波的输入符号的频率和相位; 以及用于暂时存储补偿符号以将其提供给第一分类单元的缓冲器。

公开(公告)号：US08036289B2

公开(公告)日：2011-10-11

申请号：US12094282

申请日：2006-12-07

Applicant: Sun-Heui Ryoo ,  Kwon-Hue Choi ,  Do-Seob Ahn

Inventor： Sun-Heui Ryoo ,  Kwon-Hue Choi ,  Do-Seob Ahn

IPC: H04K1/10

CPC classification number: H04L27/2679 ,  H04L25/0202 ,  H04L27/266

Abstract: Provided is an iterative residual frequency and phase compensation apparatus for an OFDM system and a method thereof. The apparatus includes: a first classifying unit for classifying symbol sequences by each subcarrier wave; a soft-decision calculating unit for calculating a soft-decision value of a data symbol using a soft-decision reliability obtained from iterative decoding performed by the iterative decoder; a classifying unit for classifying the soft-decision values by a carrier wave; a frequency estimating unit for estimating a residual frequency error of each carrier wave using the soft-decision value; a phase estimating unit for estimating an average residual phase error using the soft-decision value; a frequency and phase compensating unit for compensating frequencies and phases for input symbols of each carrier wave using the estimated frequency error and the estimated phase error; and a buffer for temporally storing the compensated symbols to provide it to the first classifying unit.

Abstract translation: 提供了一种用于OFDM系统的迭代残余频率和相位补偿装置及其方法。 该装置包括：第一分类单元，用于通过每个子载波分类符号序列; 软判决计算单元，用于使用由迭代解码器执行的迭代解码获得的软判决可靠性来计算数据符号的软判决值; 分类单元，用于通过载波对软判决值进行分类; 频率估计单元，用于使用所述软判决值估计每个载波的残余频率误差; 相位估计单元，用于使用所述软判决值来估计平均残留相位误差; 频率和相位补偿单元，用于使用估计的频率误差和估计的相位误差来补偿每个载波的输入符号的频率和相位; 以及用于暂时存储补偿符号以将其提供给第一分类单元的缓冲器。

公开(公告)号：US08111773B2

公开(公告)日：2012-02-07

申请号：US12252772

申请日：2008-10-16

Applicant: Sun-Heui Ryoo ,  Sae-Woong Bahk ,  Young-Han Kim

Inventor： Sun-Heui Ryoo ,  Sae-Woong Bahk ,  Young-Han Kim

IPC: H04B7/02 ,  H04L1/02

CPC classification number: H04W52/42

Abstract: A transmission method for a multiple antenna system including a first device having M (>1) transmitting antennas and a second device having N (>1) receiving antennas is disclosed. The method includes determining whether there is a multiple-input multiple-output (MIMO) transmission scheme satisfying a condition that it consumes less energy than a single-input single-output (SISO) transmission scheme to transmit a frame at a given transmission power, among one or more MIMO transmission schemes available to the first device and the second device, the one or more MIMO transmission schemes being determined by the numbers of activated transmitting and receiving antennas, and MIMO code; determining a transmission mode as a MIMO mode when there is the at least one MIMO transmission scheme satisfying the condition, and otherwise determining the transmission mode as a SISO mode; and performing frame transmission from the first device to the second device in the determined transmission mode. Thus, frame transmission with power saving can be performed.

Abstract translation: 公开了一种包括具有M（> 1）个发射天线的第一设备和具有N（> 1）个接收天线的第二设备的多天线系统的传输方法。 该方法包括：确定是否存在满足比单输入单输出（SISO）传输方案消耗更少能量的条件的多输入多输出（MIMO）传输方案以在给定传输功率下传输帧， 在第一设备和第二设备可用的一个或多个MIMO传输方案中，一个或多个MIMO传输方案由激活的发射和接收天线的数量以及MIMO码确定; 当存在满足条件的至少一个MIMO传输方案时，将传输模式确定为MIMO模式，否则将传输模式确定为SISO模式; 以及在所确定的传输模式中执行从第一设备到第二设备的帧传输。 因此，能够进行省电的帧传输。

公开(公告)号：US20100098184A1

公开(公告)日：2010-04-22

申请号：US12252772

申请日：2008-10-16

Applicant: Sun-Heui Ryoo ,  Sae-Woong Bahk ,  Young-Han Kim

Inventor： Sun-Heui Ryoo ,  Sae-Woong Bahk ,  Young-Han Kim

IPC: H04L27/28

CPC classification number: H04W52/42

Abstract: A transmission method for a multiple antenna system including a first device having M (>1) transmitting antennas and a second device having N (>1) receiving antennas is disclosed. The method includes determining whether there is a multiple-input multiple-output (MIMO) transmission scheme satisfying a condition that it consumes less energy than a single-input single-output (SISO) transmission scheme to transmit a frame at a given transmission power, among one or more MIMO transmission schemes available to the first device and the second device, the one or more MIMO transmission schemes being determined by the numbers of activated transmitting and receiving antennas, and MIMO code; determining a transmission mode as a MIMO mode when there is the at least one MIMO transmission scheme satisfying the condition, and otherwise determining the transmission mode as a SISO mode; and performing frame transmission from the first device to the second device in the determined transmission mode. Thus, frame transmission with power saving can be performed.

Abstract translation: 公开了一种包括具有M（> 1）个发射天线的第一设备和具有N（> 1）个接收天线的第二设备的多天线系统的传输方法。 该方法包括：确定是否存在满足比单输入单输出（SISO）传输方案消耗更少能量的条件的多输入多输出（MIMO）传输方案以在给定传输功率下传输帧， 在第一设备和第二设备可用的一个或多个MIMO传输方案中，一个或多个MIMO传输方案由激活的发射和接收天线的数量以及MIMO码确定; 当存在满足条件的至少一个MIMO传输方案时，将传输模式确定为MIMO模式，否则将传输模式确定为SISO模式; 以及在所确定的传输模式中执行从第一设备到第二设备的帧传输。 因此，能够进行省电的帧传输。