公开(公告)号：US09634693B2

公开(公告)日：2017-04-25

申请号：US13248900

申请日：2011-09-29

Applicant: Eran Pisek ,  Shadi Abu-Surra ,  Thomas M. Henige

Inventor： Eran Pisek ,  Shadi Abu-Surra ,  Thomas M. Henige

IPC: H03M13/00 ,  H03M13/31 ,  H03M13/03 ,  H03M13/11

CPC classification number: H03M13/31 ,  H03M13/033 ,  H03M13/1137 ,  H03M13/114 ,  H03M13/116 ,  H03M13/118

Abstract: An apparatus and method decode LDPC code. The apparatus includes a memory and a number of LDPC processing elements. The memory is configured to receive a LDPC codeword having a length equal to a lifting factor times a base LDPC code length, wherein the lifting factor is greater than one. The number of LDPC processing elements configured to decode the LDPC codeword, wherein each of the number of LDPC processing elements decode separate portions of the LDPC codeword.

公开(公告)号：US09100052B2

公开(公告)日：2015-08-04

申请号：US14033229

申请日：2013-09-20

Applicant: Eran Pisek

Inventor： Eran Pisek

IPC: H03M13/00 ,  H03M13/25 ,  H03M13/03 ,  H03M13/11 ,  H03M13/41

CPC classification number: H03M13/256 ,  H03M13/033 ,  H03M13/1154 ,  H03M13/116 ,  H03M13/41

Abstract: A low-density parity check (LDPC) encoding method for increasing constraint length includes determining a LDPC code block H-matrix including a systematic submatrix (Hsys) of input systematic data and a parity check submatrix (Hpar) of parity check bits. The method includes diagonalizing the parity check submatrix (Hpar). The method includes identifying a set of rows of the H-matrix that form a complete set of the input systematic data. The method includes selecting an input bit granularity (γ) and encoding latency. The method further includes obtaining a quasi-cyclic LDPC (QC-LDPC) convolutional code H-Matrix. Further, the method includes combining the set of rows into a single row.

Abstract translation: 用于增加约束长度的低密度奇偶校验（LDPC）编码方法包括确定包括输入系统数据的系统子矩阵（Hsys）和奇偶校验位的奇偶校验子矩阵（Hpar）的LDPC码块H矩阵。 该方法包括对齐奇偶校验子矩阵（Hpar）。 该方法包括识别形成输入系统数据的完整集合的一组H矩阵的行。 该方法包括选择输入比特粒度（γ）和编码等待时间。 该方法还包括获得准循环LDPC（QC-LDPC）卷积码H-Matrix。 此外，该方法包括将该组行组合成单个行。

公开(公告)号：US20140223254A1

公开(公告)日：2014-08-07

申请号：US14033229

申请日：2013-09-20

Applicant: Eran Pisek

Inventor： Eran Pisek

IPC: H03M13/25

CPC classification number: H03M13/256 ,  H03M13/033 ,  H03M13/1154 ,  H03M13/116 ,  H03M13/41

Abstract: A low-density parity check (LDPC) encoding method for increasing constraint length includes determining a LDPC code block H-matrix including a systematic submatrix (Hsys) of input systematic data and a parity check submatrix (Hpar) of parity check bits. The method includes diagonalizing the parity check submatrix (Hpar). The method includes identifying a set of rows of the H-matrix that form a complete set of the input systematic data. The method includes selecting an input bit granularity (γ) and encoding latency. The method further includes obtaining a quasi-cyclic LDPC (QC-LDPC) convolutional code H-Matrix. Further, the method includes combining the set of rows into a single row.

Abstract translation: 用于增加约束长度的低密度奇偶校验（LDPC）编码方法包括确定包括输入系统数据的系统子矩阵（Hsys）和奇偶校验位的奇偶校验子矩阵（Hpar）的LDPC码块H矩阵。 该方法包括对齐奇偶校验子矩阵（Hpar）。 该方法包括识别形成输入系统数据的完整集合的一组H矩阵的行。 该方法包括选择输入比特粒度（γ）和编码等待时间。 该方法还包括获得准循环LDPC（QC-LDPC）卷积码H-Matrix。 此外，该方法包括将该组行组合成单个行。

公开(公告)号：US08627166B2

公开(公告)日：2014-01-07

申请号：US13306747

申请日：2011-11-29

Applicant: Shadi Abu-Surra ,  Thomas M. Henige ,  Eran Pisek ,  Zhouyue Pi

Inventor： Shadi Abu-Surra ,  Thomas M. Henige ,  Eran Pisek ,  Zhouyue Pi

IPC: H03M13/00

CPC classification number: H03M13/618 ,  H03M13/033 ,  H03M13/036 ,  H03M13/1137 ,  H03M13/116 ,  H03M13/6516

Abstract: A method constructs a family of low-density-parity-check (LDPC) codes. The method includes identifying a code rate for an LDPC code in the family, identifying a protograph for the LDPC code, and constructing a base matrix for the LDPC code. The base matrix is constructed by replacing each zero in the protograph with a ‘−1’, selecting a corresponding value for an absolute shift for each one in the protograph based on constraining a number of relative shifts per column of the LDPC code to one and increasing a size of a smallest cycle in a graph of the LDPC code, and replacing each one in the protograph with the corresponding value.

Abstract translation: 一种方法构建了一系列低密度奇偶校验（LDPC）码。 该方法包括识别该系列中的LDPC码的码率，识别LDPC码的原型图，以及构造LDPC码的基本矩阵。 基本矩阵是通过用“-1”代替原型图中的每个零来构造的，基于将每个LDPC码的相对位移数量约束为1，为了对原型图中的每一个选择相应的绝对位移值， 增加LDPC码的图形中的最小周期的大小，并将原型图中的每一个替换为相应的值。

公开(公告)号：US08606259B2

公开(公告)日：2013-12-10

申请号：US11655471

申请日：2007-01-19

Applicant: Thirumalarao Voonna ,  Jasmin Oz ,  Eran Pisek ,  Thomas M. Henige

Inventor： Thirumalarao Voonna ,  Jasmin Oz ,  Eran Pisek ,  Thomas M. Henige

IPC: H04W24/00

CPC classification number: H04B17/0085

Abstract: A method for testing a software-defined radio (SDR) device is provided. The method includes configuring the SDR device for a first standard. A first test is performed on the SDR device under the first standard. Test data for the first test is received from the SDR device. A switching time for configuring the SDR device for the first standard is determined based on the test data for the first test.

Abstract translation: 提供了一种用于测试软件定义无线电（SDR）设备的方法。 该方法包括为第一标准配置SDR设备。 在第一个标准的SDR设备上执行第一个测试。 从SDR设备接收第一次测试的测试数据。 基于第一测试的测试数据来确定用于配置用于第一标准的SDR设备的切换时间。

公开(公告)号：US08495476B2

公开(公告)日：2013-07-23

申请号：US12962324

申请日：2010-12-07

Applicant: Shadi Abu-Surra ,  Sridhar Rajagopal ,  Eran Pisek

Inventor： Shadi Abu-Surra ,  Sridhar Rajagopal ,  Eran Pisek

IPC: G06F11/00

CPC classification number: H03M13/2936 ,  H03M5/145 ,  H03M13/1515 ,  H03M13/2707 ,  H03M13/6356 ,  H03M13/6362 ,  H04B10/116 ,  H04L1/0042 ,  H04L1/0047 ,  H04L1/0057 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071

Abstract: A transmitter is capable of performing both Galois Field (GF) (16) and GF (256) encoding in a visual light communication system. The transmitter includes a GF (256) encoder. The transmitter also includes a first bit mapper configured to map a first number of bits to a second number of bits. The Galois Field (256) encoder is configured to receive and encode the second number of bits. The transmitter also includes a second bit mapper configured to map the second number of bits to the first number of bits. The transmitter also includes an interleaver unit that can pad bits based on a frame size and puncture the bits after interleaving and prior to transmission.

Abstract translation: 发射机能够在视觉光通信系统中执行Galois Field（GF）（16）和GF（256）编码。 发射机包括一个GF（256）编码器。 发射机还包括配置成将第一比特数映射到第二比特数的第一比特映射器。 伽罗瓦域（256）编码器被配置为接收和编码第二位数。 发射机还包括配置成将第二位数映射到第一位数的第二位映射器。 发射机还包括交织器单元，其可以基于帧大小来填充比特，并且在交织之后和发送之前对比特进行穿孔。

公开(公告)号：US20120240001A1

公开(公告)日：2012-09-20

申请号：US13306747

申请日：2011-11-29

Applicant: Shadi Abu-Surra ,  Thomas M. Henige ,  Eran Pisek ,  Zhouyue Pi

Inventor： Shadi Abu-Surra ,  Thomas M. Henige ,  Eran Pisek ,  Zhouyue Pi

IPC: H03M13/05 ,  G06F11/10

CPC classification number: H03M13/618 ,  H03M13/033 ,  H03M13/036 ,  H03M13/1137 ,  H03M13/116 ,  H03M13/6516

Abstract: A method constructs a family of low-density-parity-check (LDPC) codes. The method includes identifying a code rate for an LDPC code in the family, identifying a protograph for the LDPC code, and constructing a base matrix for the LDPC code. The base matrix is constructed by replacing each zero in the protograph with a ‘−1’, selecting a corresponding value for an absolute shift for each one in the protograph based on constraining a number of relative shifts per column of the LDPC code to one and increasing a size of a smallest cycle in a graph of the LDPC code, and replacing each one in the protograph with the corresponding value.

Abstract translation: 一种方法构建了一系列低密度奇偶校验（LDPC）码。 该方法包括识别该系列中的LDPC码的码率，识别LDPC码的原型图，以及构造LDPC码的基本矩阵。 基本矩阵是通过用“-1”代替原型图中的每个零来构造的，基于将每个LDPC码的相对位移数量约束为1，为了对原型图中的每一个选择相应的绝对位移值， 增加LDPC码的图形中的最小周期的大小，并将原型图中的每一个替换为相应的值。

公开(公告)号：US20120084625A1

公开(公告)日：2012-04-05

申请号：US13248900

申请日：2011-09-29

Applicant: Eran Pisek ,  Shadi Abu-Surra ,  Thomas M. Henige

Inventor： Eran Pisek ,  Shadi Abu-Surra ,  Thomas M. Henige

IPC: H03M13/00 ,  G06F11/08

CPC classification number: H03M13/31 ,  H03M13/033 ,  H03M13/1137 ,  H03M13/114 ,  H03M13/116 ,  H03M13/118

Abstract: An apparatus and method decode LDPC code. The apparatus includes a memory and a number of LDPC processing elements. The memory is configured to receive a LDPC codeword having a length equal to a lifting factor times a base LDPC code length, wherein the lifting factor is greater than one. The number of LDPC processing elements configured to decode the LDPC codeword, wherein each of the number of LDPC processing elements decode separate portions of the LDPC codeword.

Abstract translation: 一种解码LDPC码的装置和方法。 该装置包括存储器和多个LDPC处理元件。 存储器被配置为接收长度等于提升因子乘以基本LDPC码长度的LDPC码字，其中提升因子大于1。 被配置为对LDPC码字进行解码的LDPC处理单元的数量，其中，所述多个LDPC处理单元中的每一个解码所述LDPC码字的分离部分。

公开(公告)号：US08032811B2

公开(公告)日：2011-10-04

申请号：US11715202

申请日：2007-03-07

Applicant: Thomas M. Henige ,  Eran Pisek

Inventor： Thomas M. Henige ,  Eran Pisek

IPC: H03M13/03

CPC classification number: H03M13/2764 ,  H03M13/2753 ,  H03M13/2957 ,  H03M13/6508

Abstract: An almost regular permutation (ARP) interleaver and method generate interleaved indices in a sequential fashion based on a process in which each interleaved index is a function of an adjacent index. Based on the data block size (N) for a received data block and a constant (C) for the ARP interleaver, a plurality of interleaved indices is generated. For one embodiment in which the interleaved indices are generated in forward sequence, the adjacent interleaved index is the immediately previous index, P(j−1), and each interleaved index (P(j)) is generated based on incrementing the previous interleaved index (P(j−1)) by an incremental value k(i), where j represents a non-interleaved index between 0 and N−1, i represents a modulo-C counter index that corresponds to j, k(i) represents the i-th value of a set of incremental values associated with N and C.

Abstract translation: 几乎常规排列（ARP）交织器和方法基于其中每个交织索引是相邻索引的函数的过程以顺序方式产生交错索引。 基于接收数据块的数据块大小（N）和用于ARP交织器的常数（C），生成多个交织索引。 对于其中以正向序列生成交织索引的一个实施例，相邻交织索引是紧接在前的索引P（j-1），并且每个交织索引（P（j））是基于递增先前的交织索引 （P（j-1））乘以增量值k（i），其中j表示0和N-1之间的非交织索引，i表示对应于j的模C计数器索引，k（i）表示 与N和C相关联的一组增量值的第i个值。

公开(公告)号：US20110047433A1

公开(公告)日：2011-02-24

申请号：US12855442

申请日：2010-08-12

Applicant: Shadi Abu-Surra ,  Eran Pisek ,  Zhouyue Pi

Inventor： Shadi Abu-Surra ,  Eran Pisek ,  Zhouyue Pi

IPC: H03M13/11 ,  G06F11/10

CPC classification number: H04L1/0057 ,  H03M13/033 ,  H03M13/036 ,  H03M13/1137 ,  H03M13/116 ,  H03M13/1165 ,  H03M13/118 ,  H03M13/6362 ,  H03M13/6516 ,  H03M13/6525 ,  H03M13/6544 ,  H04L1/005

Abstract: A family of low density parity check (LDPC) codes is generated based on a mother code having a highest code rate. The low density parity check (LDPC) codes include a codeword size of at least 1344. The LDPC codes also include a plurality of parity bits in a lower triangular form. The mother code is constructed by: selecting m number of rows and n number of columns; setting maximum column weights and row weights; designing a protograph matrix based on the set column weights and row weights and selected m and n; and selecting circulant blocks based on the protograph matrix.

Abstract translation: 基于具有最高码率的母码生成低密度奇偶校验（LDPC）码族。 低密度奇偶校验（LDPC）码包括至少1344的码字大小。LDPC码还包括下三角形形式的多个奇偶校验位。 母码由以下构成：选择m行和n列; 设置最大列权重和行权重; 基于设置的列权重和行权重设计原型矩阵，并选择m和n; 并根据原型矩阵选择循环块。