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    SATELLITE COMMUNICATION SYSTEM UTILIZING LOW DENSITY PARITY CHECK CODES
    12.
    发明申请
    SATELLITE COMMUNICATION SYSTEM UTILIZING LOW DENSITY PARITY CHECK CODES 有权
    卫星通信系统利用低密度奇偶校验码

    公开(公告)号：US20110126076A1

    公开(公告)日：2011-05-26

    申请号：US12967894

    申请日：2010-12-14

    申请人： Mustafa Eroz ,  Feng-Wen Sun ,  Lin-Nan Lee ,  Dan Fraley

    发明人： Mustafa Eroz ,  Feng-Wen Sun ,  Lin-Nan Lee ,  Dan Fraley

    IPC分类号： H03M13/11 ,  G06F11/10

    CPC分类号： H03M13/1137 ,  H03M13/1165 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/19 ,  H03M13/255 ,  H03M13/2906 ,  H03M13/356 ,  H03M13/6505 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/007

    摘要： An approach for reliably communicating over a satellite in support of a communication service including, for example, as direct broadcast satellite and data service, is disclosed. An input message is encoded, yielding a structured Low Density Parity Check (LDPC) coded message. The coded message is modulated according to a high order modulation scheme that has a signal constellation representing more than two symbols per signaling point—e.g., 8-PSK (Phase Shift Keying) and 16-QAM (Quadrature Amplitude Modulation). The system includes a transmitter configured to propagate the modulated signal over the satellite. The above approach is particularly applicable to bandwidth constrained communication systems requiring high data rates.

    摘要翻译： 公开了一种用于通过卫星可靠地通信以支持包括例如直接广播卫星和数据服务在内的通信服务的方法。 编码输入消息，产生结构化的低密度奇偶校验（LDPC）编码消息。 编码消息根据高阶调制方案进行调制，该高阶调制方案具有每个信令点（例如8-PSK（相移键控）和16-QAM（正交幅度调制））多于两个符号的信号星座。 该系统包括被配置成通过卫星传播调制信号的发射机。 上述方法特别适用于需要高数据速率的带宽受限通信系统。

    Code design and implementation improvements for low density parity check codes for multiple-input multiple-output channels
    13.
    发明授权
    Code design and implementation improvements for low density parity check codes for multiple-input multiple-output channels 有权
    用于多输入多输出通道的低密度奇偶校验码的代码设计和实现改进

    公开(公告)号：US07725802B2

    公开(公告)日：2010-05-25

    申请号：US11201796

    申请日：2005-08-11

    申请人： Mustafa Eroz ,  Lin-Nan Lee ,  Feng-Wen Sun

    发明人： Mustafa Eroz ,  Lin-Nan Lee ,  Feng-Wen Sun

    IPC分类号： H03M13/00

    CPC分类号： H03M13/1185 ,  H03M13/1137 ,  H03M13/152 ,  H03M13/2906 ,  H04B7/02 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0625

    摘要： Methods and systems for designing LDPC codes are disclosed. A method in accordance with the present invention comprises configuring a plurality (M) of parallel accumulation engines, accumulating a first information bit at a first set of specific parity bit addresses using the accumulation engines, increasing a parity bit address for each of the parity bit addresses by a pre-determined offset for each new information bit, accumulating subsequent information bits at parity bit addresses offset from the parity bit addresses by a pre-determined offset until an M+1 information bit is reached, accumulating the next M information bits at a second set of specific parity bit addresses using the parallel accumulation engines, increasing a parity bit address for each member of the second set of parity bit addresses by the pre-determined offset for each new information bit; and repeating accumulating and increasing the addresses until the information bits are exhausted.

    摘要翻译： 公开了用于设计LDPC码的方法和系统。 根据本发明的方法包括配置多个（M）并行累积引擎，使用累积引擎在第一组特定奇偶校验位地址处累积第一信息比特，增加每个奇偶校验位的奇偶校验位地址 通过对于每个新信息位的预定偏移量来寻址，将奇偶校验位地址的后续信息位累积到从奇偶校验位地址偏移预定偏移量直到达到M + 1个信息位，将下一个M个信息位累加在 使用并行累积引擎的第二组特定奇偶校验位地址，为每个新信息比特增加第二组奇偶校验位地址的每个成员的预定偏移量的奇偶校验位地址; 并重复累积和增加地址直到信息位耗尽。

    METHOD AND SYSTEM FOR PROVIDING SCRAMBLED CODED MULTIPLE ACCESS (SCMA)
    15.
    发明申请
    METHOD AND SYSTEM FOR PROVIDING SCRAMBLED CODED MULTIPLE ACCESS (SCMA) 审中-公开
    提供编码多路访问（SCMA）的方法和系统

    公开(公告)号：US20090028324A1

    公开(公告)日：2009-01-29

    申请号：US12056144

    申请日：2008-03-26

    申请人： Mustafa Eroz ,  Lin-Nan Lee ,  Lakshmi Iyer ,  Neal Becker

    发明人： Mustafa Eroz ,  Lin-Nan Lee ,  Lakshmi Iyer ,  Neal Becker

    IPC分类号： H04L9/00

    CPC分类号： H03M13/2957 ,  H03M13/2903

    摘要： A multiple access scheme is described. A first bit stream is scrambled from a first terminal according to a first scrambling signature. A second bit stream is scrambled from a second terminal according to a second scrambling signature, wherein the first bit stream and the second bit stream are encoded using a low rate code. The first scrambling signature and the second scrambling signature are assigned, respectively, to the first terminal and the second terminal to provide a multiple access scheme.

    摘要翻译： 描述多址方案。 根据第一加扰签名从第一终端对第一比特流进行加扰。 根据第二加扰签名从第二终端对第二比特流进行加扰，其中使用低速率码对第一比特流和第二比特流进行编码。 分别将第一加扰签名和第二加扰签名分配给第一终端和第二终端以提供多址方案。

    Method and system for providing long and short block length low density parity check (LDPC) codes
    16.
    发明授权
    Method and system for providing long and short block length low density parity check (LDPC) codes 有权
    提供长和短块长度低密度奇偶校验（LDPC）码的方法和系统

    公开(公告)号：US07483496B2

    公开(公告)日：2009-01-27

    申请号：US11938071

    申请日：2007-11-09

    申请人： Mustafa Eroz ,  Feng-Wen Sun ,  Lin-Nan Lee

    发明人： Mustafa Eroz ,  Feng-Wen Sun ,  Lin-Nan Lee

    IPC分类号： H04L27/00

    CPC分类号： H03M13/1165 ,  H03M13/1137 ,  H03M13/152 ,  H03M13/2906

    摘要： An approach is provided for generating Low Density Parity Check (LDPC) codes. An LDPC encoder generates a LDPC code with an outer Bose Chaudhuri Hocquenghem (BCH) code. For 1/3 rate, the relevant parameters are as follows: q=120, nldpc=64,800, kldpc=nBCH=21600, kBCH=21408 (12 bit error correcting BCH). For 1/4 rate, the LDPC code has the following relevant parameters: q=135, nldpc=64,800, kldpc=nBCH=16200, kBCH=16008 (12 bit error correcting BCH). For 2/5 rate, the following parameters exist: q=108, nldpc=64800, kldpc=nBCH=25920, kBCH=25728 (12 bit error correcting BCH). The above approach has particular application in digital video broadcast services over satellite.

    摘要翻译： 提供了一种用于生成低密度奇偶校验（LDPC）码的方法。 LDPC编码器生成具有外部Bose Chaudhuri Hocquenghem（BCH）码的LDPC码。 对于1/3速率，相关参数如下：q = 120，nldpc = 64,800，kldpc = nBCH = 21600，kBCH = 21408（12位纠错BCH）。 对于1/4速率，LDPC码具有以下相关参数：q = 135，nldpc = 64,800，kldpc = nBCH = 16200，kBCH = 16008（12位纠错BCH）。 对于2/5速率，存在以下参数：q = 108，nldpc = 64800，kldpc = nBCH = 25920，kBCH = 25728（12位纠错BCH）。 上述方法在卫星数字视频广播业务中具有特殊应用。

    Encoding low density parity check (LDPC) codes through an LDPC decoder
    17.
    发明授权
    Encoding low density parity check (LDPC) codes through an LDPC decoder 有权
    通过LDPC解码器对低密度奇偶校验（LDPC）码进行编码

    公开(公告)号：US07430396B2

    公开(公告)日：2008-09-30

    申请号：US10883338

    申请日：2004-07-01

    申请人： Feng-Wen Sun ,  Mustafa Eroz ,  Lin-Nan Lee

    发明人： Feng-Wen Sun ,  Mustafa Eroz ,  Lin-Nan Lee

    IPC分类号： H04H1/00 ,  H03M13/00

    CPC分类号： H03M13/1102 ,  H03M13/2957

    摘要： An approach is providing for supporting broadcast transmission of low density parity check (LDPC) coded signals. A receiver includes a decoder configured to decode an LDPC signal to output a decoded signal. The decoder is further configured to operate as an encoder; as such, interference cancellation can be implemented by the encoder re-encoded the received decoded signal. The above approach has particular applicability to satellite broadcast systems.

    摘要翻译： 一种方法是提供支持低密度奇偶校验（LDPC）编码信号的广播传输。 接收机包括：解码器，被配置为解码LDPC信号以输出解码信号。 解码器还被配置为作为编码器操作; 因此，干扰消除可以由编码器重新编码接收的解码信号来实现。 上述方法对卫星广播系统具有特别的适用性。

    Method and apparatus for orthogonally overlaying variable chip rate spread spectrum signals
    20.
    发明申请
    Method and apparatus for orthogonally overlaying variable chip rate spread spectrum signals 有权
    用于正交叠加可变码片速率扩频信号的方法和装置

    公开(公告)号：US20080137766A1

    公开(公告)日：2008-06-12

    申请号：US12009275

    申请日：2008-01-17

    申请人： Feng-Wen Sun ,  Lin-Nan Lee ,  Khalid Karimullah

    发明人： Feng-Wen Sun ,  Lin-Nan Lee ,  Khalid Karimullah

    IPC分类号： H04L23/02

    CPC分类号： H04B1/707 ,  H04J13/0048 ,  H04J13/18 ,  H04W52/26

    摘要： A system and method for transmitting wideband signals via a radio communication system adapted for transmitting narrow-band signals is described. A base station is used to transmit and receive a plurality of relatively narrow-band and a plurality of relatively wideband signals. The electromagnetic spectrum available to the plurality of narrow-band signals is selectively shared with the electromagnetic spectrum available to the wideband signals by systematically separating the orthogonal codes and the carrier frequencies used for transmission. The prefixes of the orthogonal codes are preferably mutually exclusive and the carrier frequencies are preferably separated by an offset. The offset may be substantially equal to an integer multiple of the narrow-band signal's chip rate. Alternatively, the offset may be substantially equal to an odd multiple of one half the narrow-band signal's chip rate in which case every other bit of the orthogonally encoded data is inverted.

    摘要翻译： 描述了经由适于发送窄带信号的无线电通信系统发送宽带信号的系统和方法。 基站用于发送和接收多个相对窄带和多个相对宽带的信号。 可用于多个窄带信号的电磁频谱通过系统地分离用于传输的正交码和载波频率，与宽带信号可用的电磁频谱选择性共享。 正交码的前缀优选地是互斥的，并且载波频率优选地被偏移分开。 偏移量可以基本上等于窄带信号的码片速率的整数倍。 或者，偏移可以基本上等于窄带信号的码片速率的一半的奇数倍，在这种情况下，正交编码数据的每隔一位被反转。