公开(公告)号：US08675783B1

公开(公告)日：2014-03-18

申请号：US13309684

申请日：2011-12-02

申请人： Adina Matache ,  Leilei Song ,  Bhaskar V. Nallapureddy ,  Hui-Ling Lou

发明人： Adina Matache ,  Leilei Song ,  Bhaskar V. Nallapureddy ,  Hui-Ling Lou

IPC分类号： H04L27/06 ,  H04L27/00

CPC分类号： H04L1/0054 ,  H03M13/45 ,  H04L25/03171 ,  H04L25/03242 ,  H04L25/03318

摘要： Systems and methods are provided for determining a data value for a bit of interest in a received data signal. A closest 0-bit symbol candidate is selected from a plurality of 0-bit symbol candidates using a symbol selection distance approximation. A closest 1-bit symbol candidate is selected from a plurality of 1-bit symbol candidates using the symbol selection distance approximation. A 0-bit distance between the received data signal and the selected 0-bit symbol candidate is determined, and a 1-bit distance between the received data signal and the selected 1-bit symbol candidate is determined. A log likelihood ratio is calculated for the bit of interest using the determined 0-bit distance and the determined 1-bit distance.

摘要翻译： 系统和方法被提供用于确定接收到的数据信号中感兴趣的位的数据值。 使用符号选择距离近似从多个0位符号候选中选择最接近的0位符号候选。 使用符号选择距离近似，从多个1位符号候选中选择最接近的1位符号候选。 确定接收到的数据信号和所选择的0位符号候选之间的0比特距离，并确定接收到的数据信号与所选择的1比特符号候选之间的1比特距离。 使用所确定的0比特距离和所确定的1比特距离来计算感兴趣比特的对数似然比。

公开(公告)号：US08687751B1

公开(公告)日：2014-04-01

申请号：US13047056

申请日：2011-03-14

申请人： Jungwon Lee ,  Yakun Sun ,  Jiwoong Choi ,  Leilie Song ,  Adina Matache

发明人： Jungwon Lee ,  Yakun Sun ,  Jiwoong Choi ,  Leilie Song ,  Adina Matache

IPC分类号： H04B7/10

CPC分类号： H04L1/0048 ,  H04B7/0413 ,  H04J11/004

摘要： A system including a first receiver module and a first interference canceller module. The first receiver module generates a first set of decoded codewords by decoding codewords in a received signal and determines if any of the first set of decoded codewords fails cyclic redundancy check (CRC). The first interference canceller module generates a second signal based on a first decoded codeword from the first set of decoded codewords when (i) any of the first set of decoded codewords fails CRC and (ii) the first decoded codeword passes CRC. By subtracting the second signal from the first signal, the first interference canceller module (i) cancels interference of a first codeword, which corresponds to the first decoded codeword, on a second set of codewords, which includes the plurality of codewords and excludes the first codeword and (ii) generates a third signal, which includes the second set of codewords.

摘要翻译： 一种包括第一接收机模块和第一干扰消除器模块的系统。 第一接收机模块通过对接收信号中的码字进行解码来生成第一组解码码字，并且确定第一组解码码字中的任何一个是否失败循环冗余校验（CRC）。 当（i）第一组解码码字中的任何一个失败CRC时，和（ii）第一解码码字通过CRC，第一干扰消除器模块基于来自第一组解码码字的第一解码码字生成第二信号。 通过从第一信号中减去第二信号，第一干扰消除器模块（i）在包括多个码字的第二组码字上消除与第一解码码字相对应的第一码字的干扰，并且排除第一信号 码字和（ii）产生包括第二组码字的第三信号。

公开(公告)号：US08281213B1

公开(公告)日：2012-10-02

申请号：US12852817

申请日：2010-08-09

申请人： Adina Matache ,  Heng Tang ,  Gregory Burd ,  Aditya Ramamoorthy ,  Jun Xu ,  Zining Wu

发明人： Adina Matache ,  Heng Tang ,  Gregory Burd ,  Aditya Ramamoorthy ,  Jun Xu ,  Zining Wu

IPC分类号： H03M13/00

CPC分类号： H03M13/1177 ,  H03M13/116 ,  H03M13/1188

摘要： A multiple-input multiple-output (MIMO) transmitter including a scrambler and a forward error correction encoder. The scrambler is configured to receive user data and generate scrambled data in response to the user data. The forward error correction encoder is configured to generate encoded data, in response to the scrambled data, using a low density parity check (LDPC) matrix, wherein the LDPC matrix is derived from a specified base matrix.

摘要翻译： 一种包括扰频器和前向纠错编码器的多输入多输出（MIMO）发射机。 加扰器被配置为接收用户数据并响应于用户数据产生加扰数据。 前向纠错编码器被配置为使用低密度奇偶校验（LDPC）矩阵来响应于加扰的数据生成编码数据，其中从指定的基本矩阵导出LDPC矩阵。

公开(公告)号：US08644262B1

公开(公告)日：2014-02-04

申请号：US13112009

申请日：2011-05-20

申请人： Yakun Sun ,  Adina Matache ,  Jungwon Lee

发明人： Yakun Sun ,  Adina Matache ,  Jungwon Lee

IPC分类号： H04W4/00

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0632 ,  H04B7/066 ,  H04B7/0671 ,  H04B7/0673 ,  H04B7/0678 ,  H04B7/068 ,  H04B7/0691 ,  H04B17/336 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/0036 ,  H04L1/06 ,  H04L5/0023

摘要： Systems and methods are provided for determining a channel quality indicator (CQI) in a transmission system associated with a diversity transmission scheme. A plurality of independent diversity branches are identified in the diversity transmission scheme. Each one of the independent diversity branches may correspond to a different portion of the effective channel and may include any suitable combination of frequency, time, and/or spatial components of the effective channel or of any wired or wireless paths or combinations of the same. An effective Signal-to-Noise Ratio (SNR) value is computed for each one of the identified independent diversity branches. The computed effective SNR values are combined for the identified independent diversity branches to generate a CQI value.

摘要翻译： 提供了用于确定与分集传输方案相关联的传输系统中的信道质量指示符（CQI）的系统和方法。 在分集传输方案中识别出多个独立分集分支。 独立分集分支中的每一个可以对应于有效信道的不同部分，并且可以包括有效信道或任何有线或无线路径或其组合的频率，时间和/或空间分量的任何合适的组合。 为所识别的独立分集分支中的每一个计算有效的信噪比（SNR）值。 为所识别的独立分集分支组合计算出的有效SNR值以产生CQI值。

公开(公告)号：US08630371B1

公开(公告)日：2014-01-14

申请号：US13475191

申请日：2012-05-18

申请人： Jungwon Lee ,  Raj M. Misra ,  Adina Matache ,  Konstantinos Sarrigeorgidis

发明人： Jungwon Lee ,  Raj M. Misra ,  Adina Matache ,  Konstantinos Sarrigeorgidis

IPC分类号： H03K9/00

CPC分类号： H04L25/024 ,  H04L25/022 ,  H04L25/0228 ,  H04L27/2601 ,  H04L27/2657 ,  H04L2027/003 ,  H04L2027/0067 ,  H04L2027/0093

摘要： Systems and methods are provided for channel estimation using linear phase estimation. These systems and methods enable improved channel estimation by estimating a linear channel phase between received pilot subcarrier signals. The estimated linear phase can then be removed from the received pilot subcarrier signals. After the estimated linear phase is removed from the received pilot subcarrier signals, a channel response can be estimated. A final estimated channel response can be generated by multiplying the results of the linear channel estimation by the estimated linear phase.

摘要翻译： 提供了使用线性相位估计的信道估计的系统和方法。 这些系统和方法通过估计接收的导频副载波信号之间的线性信道相位来实现改进的信道估计。 然后可以从接收到的导频子载波信号中去除估计的线性相位。 在从接收到的导频子载波信号中去除估计的线性相位之后，可以估计信道响应。 可以通过将线性信道估计的结果乘以估计的线性相位来生成最终估计的信道响应。

公开(公告)号：US08489960B1

公开(公告)日：2013-07-16

申请号：US13614065

申请日：2012-09-13

申请人： Adina Matache ,  Heng Tang ,  Gregory Burd ,  Aditya Ramamoorthy ,  Jun Xu ,  Zining Wu

发明人： Adina Matache ,  Heng Tang ,  Gregory Burd ,  Aditya Ramamoorthy ,  Jun Xu ,  Zining Wu

IPC分类号： H03M13/00

CPC分类号： H03M13/1177 ,  H03M13/116 ,  H03M13/1188

摘要： A communications device including a low-density parity check (LDPC) encoder and a transmitter. The LDPC encoder is configured to (i) receive data, and (ii) in response to the received data, generate encoded data using a predetermined LDPC matrix, in which the predetermined LDPC matrix is specified by a predetermined base matrix. The transmitter is configured to transmit the encoded data over a communications channel.

摘要翻译： 一种包括低密度奇偶校验（LDPC）编码器和发射机的通信设备。 LDPC编码器被配置为（i）接收数据，并且（ii）响应于所接收的数据，使用预定的LDPC矩阵来生成编码数据，其中预定的LDPC矩阵由预定的基本矩阵指定。 发射机被配置为通过通信信道发送编码数据。

公开(公告)号：US08194768B1

公开(公告)日：2012-06-05

申请号：US12195158

申请日：2008-08-20

申请人： Jungwon Lee ,  Raj M. Misra ,  Adina Matache ,  Konstantinos Sarrigeorgidis

发明人： Jungwon Lee ,  Raj M. Misra ,  Adina Matache ,  Konstantinos Sarrigeorgidis

IPC分类号： H04K1/10

CPC分类号： H04L25/024 ,  H04L25/022 ,  H04L25/0228 ,  H04L27/2601 ,  H04L27/2657 ,  H04L2027/003 ,  H04L2027/0067 ,  H04L2027/0093

摘要： Systems and methods are provided for channel estimation using linear phase estimation. These systems and methods enable improved channel estimation by estimating a linear channel phase between received pilot subcarrier signals. The estimated linear phase can then be removed from the received pilot subcarrier signals. After the estimated linear phase is removed from the received pilot subcarrier signals, a channel response can be estimated. A final estimated channel response can be generated by multiplying the results of the linear channel estimation by the estimated linear phase.

摘要翻译： 提供了使用线性相位估计的信道估计的系统和方法。 这些系统和方法通过估计接收的导频副载波信号之间的线性信道相位来实现改进的信道估计。 然后可以从接收到的导频子载波信号中去除估计的线性相位。 在从接收到的导频子载波信号中去除估计的线性相位之后，可以估计信道响应。 可以通过将线性信道估计的结果乘以估计的线性相位来生成最终估计的信道响应。

公开(公告)号：US07774675B1

公开(公告)日：2010-08-10

申请号：US11481141

申请日：2006-07-05

申请人： Adina Matache ,  Heng Tang ,  Gregory Burd ,  Aditya Ramamoorthy ,  Jun Xu ,  Zining Wu

发明人： Adina Matache ,  Heng Tang ,  Gregory Burd ,  Aditya Ramamoorthy ,  Jun Xu ,  Zining Wu

IPC分类号： H03M13/00

CPC分类号： H03M13/1177 ,  H03M13/116 ,  H03M13/1188

摘要： A MIMO transmitter comprises a scrambler; an encoder parser responsive to the scrambler; a forward error correction encoder responsive to the encoder parser, wherein the encoder applies a parity check matrix derived from a base matrix; an interleaver responsive to the forward error correction encoder; a QAM mapping module responsive to the interleaver; an inverse fast Fourier transform module responsive to the QAM mapping module; and an output module responsive to the inverse fast Fourier transform module.

摘要翻译： MIMO发射机包括扰频器; 响应于扰频器的编码器解析器; 响应于所述编码器解析器的前向纠错编码器，其中所述编码器应用从基本矩阵导出的奇偶校验矩阵; 响应于前向纠错编码器的交织器; 响应于交织器的QAM映射模块; 响应于QAM映射模块的快速傅立叶逆变换模块; 以及响应快速傅立叶逆变换模块的输出模块。

公开(公告)号：US08468428B1

公开(公告)日：2013-06-18

申请号：US12170129

申请日：2008-07-09

申请人： Adina Matache

发明人： Adina Matache

IPC分类号： H03M13/45

CPC分类号： H03M13/2969 ,  H03M13/2975 ,  H03M13/6544

摘要： Methods and apparatus are provided for utilizing early stopping rules for non-binary turbo codes. Data can be received from a channel and decoded using a non-binary turbo code to generate extrinsic information and a posteriori information. The generated extrinsic information can be evaluated using an early stopping rule. A hard decision on a value of the received data can be made using the a posteriori information if the early stopping rule is satisfied.

摘要翻译： 提供了用于利用非二进制turbo码的早期停止规则的方法和装置。 可以从信道接收数据并使用非二进制turbo码进行解码，以生成外在信息和后验信息。 生成的外在信息可以使用早期停止规则进行评估。 如果满足早期停止规则，则可以使用后验信息对接收到的数据的值进行硬判决。

公开(公告)号：US08374293B1

公开(公告)日：2013-02-12

申请号：US13484043

申请日：2012-05-30

申请人： Jungwon Lee ,  Sayandev Mukherjee ,  Adina Matache

发明人： Jungwon Lee ,  Sayandev Mukherjee ,  Adina Matache

IPC分类号： H03D1/00

CPC分类号： H04W24/00 ,  H04B7/10 ,  H04B17/327 ,  H04L27/2601

摘要： Signal power of a received signal, which has a plurality of preamble sequences associated with sub-carrier signals received from a plurality of sub-carriers, in a cellular Orthogonal Frequency Division Multiplexing system may be estimated by estimating as power for at least one preamble sequence of a signal received at a selected receive antenna. The preamble sequence is associated with a base station and a set of sub-carriers. A differential received signal developed for one of the set of sub-carriers is correlated with a normalized differential transmit signal for the preamble sequence, and the estimate of the power for the at least one preamble sequence is extracted based on the correlation.

摘要翻译： 在蜂窝正交频分复用系统中，具有与从多个子载波接收的子载波信号相关联的多个前导码序列的接收信号的信号功率可以通过估计作为至少一个前同步码序列的功率来估计 在选定的接收天线处接收的信号。 前导序列与基站和一组子载波相关联。 对于一组子载波中的一个发展的差分接收信号与用于前导码序列的归一化差分发送信号相关，并且基于相关性提取至少一个前导序列的功率估计。