公开(公告)号：US09467200B2

公开(公告)日：2016-10-11

申请号：US12404251

申请日：2009-03-13

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： H04B1/707 ,  H04J13/00 ,  H04J13/18 ,  H04W52/26

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.

公开(公告)号：US08326213B2

公开(公告)日：2012-12-04

申请号：US12186485

申请日：2008-08-05

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。

公开(公告)号：US08199847B2

公开(公告)日：2012-06-12

申请号：US11879607

申请日：2007-07-18

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

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

IPC分类号： H03C5/00 ,  H03D5/00 ,  H03K7/10 ,  H03K9/10

CPC分类号： H04L27/3488 ,  H04L27/183

摘要： A method and apparatus for providing an asymmetrical backwards compatible communications signal that is capable of being decoded by QPSK and OQPSK receivers as well as PSK and QAM receivers is provided. The invention comprises a timing error accumulator coupled to a first bit stream. The first bit stream includes content that is common to the QPSK/OQPSK receiver and to the PSK/QAM receiver. A phase error accumulator is coupled to a second bit stream and adjusts the phase of symbols in the second bit stream. A phase and timing error compensator is coupled to the phase error accumulator and the timing error accumulator and adjusts the first and second bit streams received from the phase error accumulator and the timing error accumulator in order to reduce timing and phase errors. A higher order modulator coupled to the phase- and timing error compensator is also provided. The higher order modulator processes the first and second bit streams to provide the asymmetrical backwards compatible signal.

摘要翻译： 提供一种提供能够被QPSK和OQPSK接收机以及PSK和QAM接收机解码的不对称向后兼容通信信号的方法和装置。 本发明包括耦合到第一位流的定时误差累加器。 第一比特流包括对于QPSK / OQPSK接收机和PSK / QAM接收机是共同的内容。 相位误差累加器被耦合到第二比特流并且调整第二比特流中的符号的相位。 相位和定时误差补偿器耦合到相位误差累加器和定时误差累加器，并调整从相位误差累加器和定时误差累加器接收的第一和第二比特流，以减少定时和相位误差。 还提供耦合到相位和定时误差补偿器的较高阶调制器。 高阶调制器处理第一和第二比特流以提供不对称的向后兼容信号。

公开(公告)号：US08179781B2

公开(公告)日：2012-05-15

申请号：US11999561

申请日：2007-12-06

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

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

IPC分类号： H04J11/00 ,  H04B3/20

CPC分类号： H04J13/004 ,  H04J13/0077 ,  H04W52/26

摘要： A method and apparatus for encoding data for transmission in a communication system provides increased efficiency in bandwidth utilization through higher data rates, lower error rates, lower power levels, and/or increased capacity. A set of orthogonal codes is partitioned into subsets. The data to be transmitted is partitioned into packets of bit sequences, each of which is mapped to an orthogonal code in an assigned subset. The number of members in a particular subset is determined by the relative transmission requirements of the data signal the subset will be used to encode.

摘要翻译： 用于在通信系统中对用于传输的数据进行编码的方法和装置通过更高的数据速率，更低的误码率，更低的功率水平和/或增加的容量来提高带宽利用率。 一组正交码被划分成子集。 要发送的数据被划分成比特序列的分组，每个比特序列被映射到所分配的子集中的正交码。 特定子集中的成员数量由子组将用于编码的数据信号的相对传输要求确定。

公开(公告)号：US08145980B2

公开(公告)日：2012-03-27

申请号：US11938110

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： H03M13/00 ,  H03M13/03

CPC分类号： H04L1/005 ,  H03M13/1102 ,  H03M13/1111 ,  H03M13/112 ,  H03M13/1137 ,  H03M13/1165 ,  H03M13/15 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/255 ,  H03M13/2906 ,  H03M13/356 ,  H03M13/6362 ,  H03M13/6583 ,  H04H40/90 ,  H04L1/0057 ,  H04L1/006 ,  H04L27/20 ,  H04L27/34 ,  H04L27/36

摘要： An approach is provided for transmitting messages using low density parity check (LDPC) codes. Input messages are encoded according to a structured parity check matrix that imposes restrictions on a sub-matrix of the parity check matrix to generate LDPC codes. The LDPC codes are transmitted over a radio communication system (e.g., satellite network), wherein a receiver communicating over the radio communication system is configured to iteratively decode the received LDPC codes according to a signal constellation associated with the LDPC codes. The receiver is configured to iteratively regenerating signal constellation bit metrics after one or more decoding iterations.

摘要翻译： 提供了一种使用低密度奇偶校验（LDPC）码传输消息的方法。 根据对奇偶校验矩阵的子矩阵施加限制以生成LDPC码的结构化奇偶校验矩阵对输入消息进行编码。 LDPC码通过无线电通信系统（例如，卫星网络）发送，其中通过无线电通信系统通信的接收机被配置为根据与LDPC码相关联的信号星座对所接收的LDPC码进行迭代解码。 接收机被配置为在一个或多个解码迭代之后迭代地再生信号星座位度量。

公开(公告)号：US08102947B2

公开(公告)日：2012-01-24

申请号：US12498968

申请日：2009-07-07

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： H03D3/00

CPC分类号： H03M13/13 ,  H03M13/1137 ,  H03M13/1165 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/255 ,  H03M13/2906 ,  H03M13/2927 ,  H03M13/6306 ,  H04L1/0041 ,  H04L1/0057 ,  H04L1/0071 ,  H04L27/186 ,  H04L27/2053

摘要： An approach is provided for bit labeling of a signal constellation. A transmitter generates encoded signals using, according to one embodiment, a structured parity check matrix of a Low Density Parity Check (LDPC) code. The transmitter includes an encoder for transforming an input message into a codeword represented by a plurality of set of bits. The transmitter includes logic for mapping non-sequentially (e.g., interleaving) one set of bits into a higher order constellation (Quadrature Phase Shift Keying (QPSK), 8-PSK, 16-APSK (Amplitude Phase Shift Keying), 32-APSK, etc.), wherein a symbol of the higher order constellation corresponding to the one set of bits is output based on the mapping.

摘要翻译： 提供了一种用于信号星座的位标记的方法。 根据一个实施例，发射机使用低密度奇偶校验（LDPC）码的结构奇偶校验矩阵来生成编码信号。 发射机包括用于将输入消息变换成由多个位组表示的码字的编码器。 发射机包括用于将一组比特的非顺序（例如，交织）映射成更高阶的星座（正交相移键控（QPSK），8-PSK，16-APSK（振幅相移键控），32-APSK， 等等），其中基于该映射输出对应于该一组比特的较高阶星座的符号。

公开(公告)号：US08069393B2

公开(公告)日：2011-11-29

申请号：US12355694

申请日：2009-01-16

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： H03M13/00

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。

公开(公告)号：US07864869B2

公开(公告)日：2011-01-04

申请号：US10961124

申请日：2004-10-08

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： H04B14/04

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。

公开(公告)号：US07770089B2

公开(公告)日：2010-08-03

申请号：US11805616

申请日：2007-05-24

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： H03M13/00

CPC分类号： H03M13/255 ,  H03M13/118 ,  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 a rate 3/5 code, the approach provides a degree profile that yields reduced memory requirements for storage of the edge values without significantly affecting the performance with respect to an “unmodified” rate 3/5 code. The relevant parameters for the reduced memory LDPC codes are as follows: q=72, nldpc=64800, kldpc=nBCH=38880, kBCH=38688. 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。 对于速率为3/5的代码，该方法提供了一个程度分布，可以减少存储边缘值的内存需求，而不会显着影响“未修改”速率3/5代码的性能。 减少存储器LDPC码的相关参数如下：q = 72，nldpc = 64800，kldpc = nBCH = 38880，kBCH = 38688。 上述方法在卫星数字视频广播业务中具有特殊应用。

公开(公告)号：US20100192038A1

公开(公告)日：2010-07-29

申请号：US12753528

申请日：2010-04-02

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： H03M13/05 ,  G06F11/10

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 of parallel accumulation engines, a number of the plurality of parallel accumulation engines equal to M, accumulating a first information bit at a first set of specific parity bit addresses using the plurality of parallel accumulation engines, increasing a parity bit address for each member of the first set of specific parity bit addresses by a pre-determined offset for each new information bit, accumulating subsequent information bits at parity bit addresses that are offset from the specific 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 plurality of parallel accumulation engines, increasing a parity bit address for each member of the second set of specific 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并行累积引擎，多个并行累加引擎中的多个等于M，使用多个并行累加累积第一组特定奇偶校验位地址处的第一信息位 引擎，通过针对每个新信息位的预定偏移增加第一组特定奇偶校验位地址的每个成员的奇偶校验位地址，在与特定奇偶校验位地址偏移的奇偶校验位地址处累积后续信息比特 预定的偏移量直到达到M + 1信息位，使用多个并行累积引擎在第二组特定奇偶校验位地址累积下一个M个信息位，增加第二组的每个成员的奇偶校验位地址 特定奇偶校验位地址由每个新信息位的预定偏移量; 并重复累积和增加地址直到信息位耗尽。