公开(公告)号：US20110059765A1

公开(公告)日：2011-03-10

申请号：US12830278

申请日：2010-07-02

Applicant: Young-Doo KIM ,  Seok Hwan PARK ,  Hae Wook PARK ,  Inkyu LEE

Inventor： Young-Doo KIM ,  Seok Hwan PARK ,  Hae Wook PARK ,  Inkyu LEE

IPC: H04W88/02

CPC classification number: H04W28/22 ,  H04B7/024 ,  H04B7/0452 ,  H04W52/40

Abstract: An achievable sum data rate with respect to each of available candidate transmission/reception modes may be calculated to select a transmission/reception mode of transmission/reception pairs repeatedly using radio resources. A transmission/reception mode to be applied may be selected from the candidate transmission/reception modes based on the calculated sum data rate. Information associated with the selected transmission/reception mode may be shared by the transmission/reception pairs.

Abstract translation: 可以计算相对于每个可用候选发送/接收模式的可实现的和数据速率，以使用无线电资源重复选择发送/接收对的发送/接收模式。 可以基于所计算的和数据速率从候选发送/接收模式中选择要应用的发送/接收模式。 与选择的发送/接收模式相关联的信息可以由发送/接收对共享。

公开(公告)号：US06691263B2

公开(公告)日：2004-02-10

申请号：US09847953

申请日：2001-05-03

Applicant: Bane V. Vasic ,  Jeffrey L. Sonntag ,  Inkyu Lee

Inventor： Bane V. Vasic ,  Jeffrey L. Sonntag ,  Inkyu Lee

IPC: H03M1341

CPC classification number: H03M13/2957 ,  G11B20/10055 ,  H03M13/6331 ,  H03M13/6343

Abstract: An iterative decoding system for intersymbol interference (ISI) channels has a module for extracting bit reliabilities from a partial response (PR) channel, an iterative decoder, and a module for updating the bit reliabilities. A transmitter parses a data sequence into blocks that are encoded to generate a sequence of codewords. By encoding, a correlation among the bits of each codeword output to the PR channel is created. A maximum likelihood sequence detector (MLSD) in the receiver produces estimates of transmitted bits from samples of the output from the PR channel. The MLSD detector has a priori knowledge of typical error events that can occur during transmission through the channel. Along with the bit estimates, at each time instant the MLSD detector generates set of error event likelihoods. These error event likelihoods are then converted into bit reliabilities that, together with estimates for the transmitted bits, are used to recalculate the bit reliabilities using the knowledge of the relation between bits within a codeword. The iterative decoder uses this soft input information (bit reliabilities and bit estimates) for each iteration of decoding to improve i) the estimate of the bit reliabilities, ii) the decisions of what bit has been transmitted, and iii) calculations for the error event likelihoods for the next iteration. These error event likelihoods are then converted into bit reliabilities that, together with estimates for the transmitted bits, are used by the iterative decoder to recalculate the bit reliabilities using the knowledge of correlation among bits within the codeword. The error event likelihoods may be updated using the updated bit reliabilities, and the updated error event likelihoods are then converted to new bit reliabilities for the next iteration. In an iterative manner, increasing those bit reliabilities that tend to show increasing confidence for corresponding decoded bits (i.e., corresponding Viterbi decisions) between iterations, while decreasing those reliabilities that tend to show decreasing confidence for corresponding decoded bits, tends to drive the iterative decoding scheme to fewer iterations while maintaining a predetermined probability of error.

公开(公告)号：US06516136B1

公开(公告)日：2003-02-04

申请号：US09347983

申请日：1999-07-06

Applicant: Inkyu Lee

Inventor： Inkyu Lee

IPC: H04N576

CPC classification number: G11B20/10046 ,  G11B20/10 ,  G11B20/10055 ,  G11B20/1426 ,  G11B20/18 ,  H03M5/12 ,  H03M5/145 ,  H03M7/46 ,  H03M13/23 ,  H04N5/781

Abstract: A data recording system employs parallel iterative decoding of soft output samples representing encoded data read from a storage medium. The iterative decoder reads packets of data from a sector of the medium, each packet containing soft output samples representing data encoded with a concatenated code formed from N component codes, N a positive integer. The iterative decoder employs I decoding iterations, I a positive integer. Each packet has a length substantially equal to the sector length divided by N. For an exemplary magnetic recording system, encoded data read from a sector of a magnetic medium is partitioned into N packets of length 4096/N. The first packet is passed to the first component code decoder of a parallel iterative decoder. When the second packet is ready to be passed to the first component code decoder, the decoded output values of the first packet in the first decoder are passed to the second component code decoder. The second packet is then applied to the first component code decoder. This operation is repeated until the last (Nth) packet is input to the first component code decoder. When the last (Nth) packet is input to the first component code decoder, all data in a sector is stored within the parallel iterative decoder and servo mode of the magnetic recording system is enabled. During servo mode, the iterative process of the iterative decoder begins. The decoded output of the first packet in the last (Nth) component code decoder is now input to the first component code decoder and the second iteration starts. Each packet in the corresponding component code decoder is then circularly shifted to the next component code decoder. After repeating the decode and shift operation for I iterations, each successive packet output from the last (Nth) component code decoder is provided as the decoded user data.

Abstract translation: 数据记录系统对表示从存储介质读取的编码数据的软输出采样采用并行迭代解码。 迭代解码器从介质的扇区读取数据分组，每个分组包含表示以由N个分量代码N形成的级联代码编码的数据的软输出样本，N为正整数。 迭代解码器采用I解码迭代，I为正整数。 每个分组具有基本上等于扇区长度除以N的长度。对于示例性磁记录系统，从磁介质的扇区读取的编码数据被划分为长度为4096 / N的N个分组。 第一个分组被传递给并行迭代解码器的第一分量代码解码器。 当第二分组准备好传递给第一分量代码解码器时，第一解码器中的第一分组的解码输出值被传递给第二分量代码解码器。 然后将第二分组应用于第一分量代码解码器。 重复该操作，直到最后（第N个）分组输入到第一分量代码解码器。 当最后（第N个）分组被输入到第一分量代码解码器时，扇区中的所有数据都被存储在并行迭代解码器中，磁记录系统的伺服模式被使能。 在伺服模式下，迭代解码器的迭代过程开始。 最后（第N）分量码解码器中的第一分组的解码输出现在被输入到第一分量代码解码器，而第二迭代开始。 然后将相应的分量代码解码器中的每个分组循环移位到下一分量代码解码器。 在重复I迭代的解码和移位操作之后，从最后（第N）个分量码解码器输出的每个连续分组被提供为解码的用户数据。

公开(公告)号：US08483305B2

公开(公告)日：2013-07-09

申请号：US12467765

申请日：2009-05-18

Applicant: Inkyu Lee ,  Sung-Hyun Moon ,  Chae-Man Lim

Inventor： Inkyu Lee ,  Sung-Hyun Moon ,  Chae-Man Lim

IPC: H04L1/02

CPC classification number: H04B7/0417

Abstract: Methods and apparatus for spatial multiplexing in a closed-loop Multi Input Multi Output (MIMO) system are provided. In a method of operating a receiver in an MIMO system, a signal transmitted by a transmitter is received. Blockwise-Orthogonalized Spatial Multiplexing (B-OSM) is performed on the received signal. Feedback information determined by performing the B-OSM on the received signal is fed back to the transmitter.

Abstract translation: 提供了一种闭环多输入多输出（MIMO）系统中空间复用的方法和装置。 在MIMO系统中操作接收机的方法中，接收由发射机发送的信号。 对接收到的信号执行块向正交空间复用（B-OSM）。 通过对接收到的信号执行B-OSM确定的反馈信息被反馈给发送器。

公开(公告)号：US20120189037A1

公开(公告)日：2012-07-26

申请号：US13498868

申请日：2010-09-17

Applicant: Han-Byul Seo ,  Youngtae Kim ,  Inkyu Lee ,  Changick Song ,  Kyoungjae Lee

Inventor： Han-Byul Seo ,  Youngtae Kim ,  Inkyu Lee ,  Changick Song ,  Kyoungjae Lee

IPC: H04B17/02

CPC classification number: H04B7/155 ,  H04B7/026 ,  H04B17/309

Abstract: Disclosed is a relay. The relay includes: a reception unit configured to receive signals from a transmitter; a processor configured to estimate a channel with respect to the transmitter based on a pilot signal of the transmitter among receiving signals, remove the pilot signal from among the received signals, amplify the signals without the pilot signal according to the estimated channel, and insert a pilot signal of the relay into the amplified signals; and a transmitter transmitting the signals including the pilot signal of the relay under the control of the processor.

Abstract translation: 披露的是一个继电器 该继电器包括：被配置为从发射机接收信号的接收单元; 处理器，被配置为基于接收信号中的发射机的导频信号来估计相对于发射机的信道，从接收信号中去除导频信号，根据所估计的信道放大没有导频信号的信号，并插入 继电器的导频信号进入放大信号; 以及在处理器的控制下发送包括继电器的导频信号的信号的发射机。

公开(公告)号：US06760883B2

公开(公告)日：2004-07-06

申请号：US09951660

申请日：2001-09-13

Applicant: Inkyu Lee

Inventor： Inkyu Lee

IPC: H03M1303

CPC classification number: H03M13/3927 ,  H03M13/3933 ,  H03M13/6505 ,  H04L1/0055

Abstract: A maximum a posteriori (MAP) detector/decoder employs an algorithm that computes log-likelihood value with an a posteriori probability (APP) value employing a number N of previous state sequences greater than or equal to two (N≧2). By defining the APP with more previous state sequences, the set of &agr; values may be calculated for a current state and then reduced. After generating the reduced set of &agr; values, the full set of &bgr; values may be generated for calculation of log-likelihood values. By calculating a set of &agr; values that may be decimated by, for example, N, the amount of memory required to store the &agr; values used in subsequent computations is reduced.

Abstract translation: 最大后验（MAP）检测器/解码器采用利用大于或等于二（N> = 2）的先前状态序列数N的后验概率（APP）值来计算对数似然值的算法。 通过用更多的先前状态序列定义APP，可以针对当前状态计算一组α值，然后减小。 在产生减少的α值集合之后，可以生成全部β值以计算对数似然值。 通过计算可以通过例如N抽取的一组α值，存储用于后续计算中的α值所需的存储器量减少。

公开(公告)号：US06581182B1

公开(公告)日：2003-06-17

申请号：US09570764

申请日：2000-05-15

Applicant: Inkyu Lee

Inventor： Inkyu Lee

IPC: H03M1303

CPC classification number: H04L1/006 ,  H03M13/29 ,  H03M13/4146 ,  H03M13/6502 ,  H04L1/0054 ,  H04L1/0065

Abstract: An iterative decoder employs detection and post-processing of channel output samples to generate soft output vales for encoded data provided to the decoder for one or more iterations of decoding. The channel output samples account for user data encoded with concatenated codes. For one or more other iterations, the reliability values of the soft values of the prior iteration are updated, generating soft output data for the decoder for the current iteration of decoding. A detector may use a soft-output Viterbi algorithm (SOVA) to detect encoded data from channel output samples, and the SOVA algorithm may be implemented by a Viterbi algorithm generating hard decisions from the output channel samples followed by post-processing to generate and update reliability values for the soft-output values based on the hard decisions and output channel samples. In one implementation, generating soft-output values from output channel samples by a detector employs the full soft-output Viterbi algorithm (SOVA) during the first iteration. For subsequent iterations, the post-processor of the full SOVA algorithm is used without a Viterbi detector.

Abstract translation: 迭代解码器使用信道输出样本的检测和后处理来产生用于一个或多个解码迭代的提供给解码器的编码数据的软输出值。 通道输出样本表示用连续代码编码的用户数据。 对于一个或多个其他迭代，更新先前迭代的软值的可靠性值，为当前的解码迭代生成解码器的软输出数据。 检测器可以使用软输出维特比算法（SOVA）来检测来自信道输出样本的编码数据，并且可以通过维特比算法来实现SOVA算法，维特比算法从输出信道样本产生硬判决，随后进行后处理以生成和更新 基于硬判决和输出通道样本的软输出值的可靠性值。 在一个实现中，由检测器从输出通道样本产生软输出值在第一次迭代期间使用完全软输出维特比算法（SOVA）。 对于随后的迭代，使用完整SOVA算法的后处理器而没有维特比检测器。

公开(公告)号：US06570919B1

公开(公告)日：2003-05-27

申请号：US09363743

申请日：1999-07-30

Applicant: Inkyu Lee

Inventor： Inkyu Lee

IPC: H03K508

CPC classification number: H04L1/005 ,  H04L1/0065 ,  H04L1/0066 ,  H04L25/03146

Abstract: A data transmission system employs an iterative decoder that applies decision feedback equalization (DFE) to channel output samples of a packet of data. The iterative decoder receives a stream of channel output samples as packets that may, for example, be read from a sector of a recording medium. Each packet may represent user data encoded, for example, with a concatenated code formed from N component codes, N a positive integer. The iterative decoder employs I decoding iterations, I a positive integer. DFE employs two filters: a feedforward filter and a feedback filter. The feedforward filter, which may be a whitened-matched filter used for detection, shifts dispersed channel output energy into the current sample. The feedback filter cancels energy of trailing inter-symbol interference from previous symbols. In each iteration by the iterative decoder, the DFE is applied to channel output samples of a packet by filtering with the feedforward filter, and then filtering with the feedback filter to cancel interference energy in the current sample from previous samples. The feedback filter uses soft information corresponding to tentative decisions for decoded data of the packet. During the first iteration, the soft information for applying DFE to the current sample is derived from the slicer output directly, and during the second and subsequent iterations the soft data of the decoder is provided to the feedback filter of the equalizer as soft information.

Abstract translation: 数据传输系统采用迭代解码器，其将判决反馈均衡（DFE）应用于信道数据包的输出样本。 迭代解码器接收信道输出样本流作为可以例如从记录介质的扇区读取的分组。 每个分组可以表示用例如由N个分量代码形成的级联代码编码的用户数据，N是正整数。 迭代解码器采用I解码迭代，I为正整数。 DFE采用两个滤波器：前馈滤波器和反馈滤波器。 可以是用于检测的白化匹配滤波器的前馈滤波器将分散的信道输出能量转移到当前样本中。 反馈滤波器消除来自先前符号的尾随符号间干扰的能量。 在迭代解码器的每次迭代中，通过用前馈滤波器滤波将DFE应用于分组的信道输出样本，然后用反馈滤波器进行滤波以消除来自先前样本的当前样本中的干扰能量。 反馈滤波器使用对应于分组的解码数据的暂定决定的软信息。 在第一次迭代中，用于将DFE应用于当前采样的软信息是直接从限幅器输出导出的，并且在第二次和随后的迭代期间，将解码器的软数据作为软信息提供给均衡器的反馈滤波器。

公开(公告)号：US06421804B1

公开(公告)日：2002-07-16

申请号：US09468400

申请日：1999-12-20

Applicant: Inkyu Lee

Inventor： Inkyu Lee

IPC: H03M1329

CPC classification number: H03M13/6502 ,  H03M13/2963

Abstract: An iterative decoder arranges calculation of updated reliability values for a current iteration of an iterative decoder so as to reduce the number of comparison operations. The variables for the magnitude and sign of the updated reliability value are initialized. A search of the previous reliability values generates first and second minimum magnitude values for each row (if the iterative decoder is decoding in the horizontal direction) or column (if the iterative decoder is decoding in the vertical direction). A test determines whether the magnitude of the previous reliability value is greater than the first minimum magnitude value m1. If so, the magnitude of the updated reliability value is set as the value m1. Otherwise, the magnitude of the updated reliability value is set as the second minimum magnitude value m2. The sign of the updated reliability value is tracked and assigned once the updated reliability value is set.

Abstract translation: 迭代解码器针对迭代解码器的当前迭代布置更新的可靠性值的计算，以便减少比较操作的数量。 更新的可靠性值的大小和符号的变量被初始化。 对先前可靠性值的搜索为每行生成第一和第二最小幅度值（如果迭代解码器在水平方向上进行解码）或列（如果迭代解码器在垂直方向上进行解码）。 测试确定先前的可靠性值的大小是否大于第一最小量值m1。 如果是，则更新的可靠性值的大小被设定为值m1。 否则，更新的可靠性值的大小被设置为第二最小值值m2。 一旦更新的可靠性值被设置，跟踪并分配更新的可靠性值的符号。