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31. 发明授权

US06925587B2 Turbo code interleaver with near optimal performance 有权
标题翻译： Turbo码交织器具有接近最佳性能
公开(公告)号：US06925587B2
公开(公告)日：2005-08-02
申请号：US10024834
申请日：2001-12-19
申请人： Mustafa Eroz , A. Roger Hammons, Jr. , Feng-Wen Sun
发明人： Mustafa Eroz , A. Roger Hammons, Jr. , Feng-Wen Sun
IPC分类号： G06F12/16 , B22D13/00 , C22F1/04 , C22F1/043 , C22F1/047 , C22F1/05 , C22F1/057 , H03M13/27 , H03M13/29
CPC分类号： H03M13/271 , H03M13/2735 , H03M13/2746 , H03M13/276 , H03M13/2767 , H03M13/2771 , H03M13/2789 , H03M13/2957
摘要： A method of interleaving blocks of indexed data of varying length is disclosed. The method includes the steps of: providing a set of basic Interleavers comprising a family of one or more permutations of the indexed data and having a variable length; selecting one of the basic Interleavers based upon a desired Interleaver length L; and adapting the selected basic Interleaver to produce an Interleaver having the desired Interleaver length L.
摘要翻译：公开了一种交织具有不同长度的索引数据块的方法。该方法包括以下步骤：提供一组基本交错器，其包括索引数据的一个或多个排列的族并具有可变长度; 基于所需的交织器长度L选择基本交织器之一; 并且使所选择的基本交织器适配以产生具有期望的交织器长度L的交织器。

32. 发明授权

US06862706B2 Method for a general near optimal turbo code trellis termination 有权
标题翻译：一般近似最优turbo码格局终止的方法
公开(公告)号：US06862706B2
公开(公告)日：2005-03-01
申请号：US10023509
申请日：2001-12-18
申请人： Mustafa Eroz , A. Roger Hammons, Jr.
发明人： Mustafa Eroz , A. Roger Hammons, Jr.
IPC分类号： G06F11/10 , H03M13/00 , H03M13/23 , H03M13/27 , H03M13/29 , H03M13/41 , H04L1/00
CPC分类号： H03M13/6362 , H03M13/2903 , H03M13/2993 , H03M13/2996 , H03M13/4123
摘要： A method of terminating two or more constituent encoders of a turbo encoder employing a turbo code, comprising the step of: generating tail input bits at each of two or more constituent encoders, including deriving the tail input bits from each of the two or more constituent encoders separately from a contents of shift registers within each of the two or more constituent encoders, after an encoding of information bits by the two or more constituent encoders; puncturing one or more tail output bits such that 1/R output tail bits are transmitted for each of a plurality of trellis branches, wherein R is a turbo code rate employed by the turbo encoder during an information bit transmission. In yet another variation, the step of puncturing the tail output bits further comprises the step of: transmitting, during trellis termination, the tail output bits, only if they are sent from an output branch of one of the two or more constituent encoders that are used during information bit transmission.
摘要翻译：一种终止采用turbo码的turbo编码器的两个或更多个组成编码器的方法，包括以下步骤：在两个或更多个组成编码器中的每一个处产生尾部输入位，包括从两个或更多个成分中的每一个导出尾部输入位在两个或多个组成编码器对信息比特进行编码之后，与两个或更多个组成编码器中的每一个中的移位寄存器的内容分开编码; 对一个或多个尾部输出位进行穿孔，使得对于多个网格分支中的每一个发送1 / R个输出尾比特，其中R是在信息比特传输期间由turbo编码器采用的turbo码率。在另一个实施例中，打孔尾部输出位的步骤还包括以下步骤：在网格终止期间，仅在从两个或更多个组成编码器之一的输出分支发送尾部输出位时发送尾部输出位，在信息位传输期间使用。

33. 发明授权

US06675348B1 Turbo-like forward error correction encoder and decoder with improved weight spectrum and reduced degradation in the waterfall performance region 有权
标题翻译： Turbo式前向误差校正编码器和解码器，具有改进的重量谱和降低瀑布性能区域的降级
公开(公告)号：US06675348B1
公开(公告)日：2004-01-06
申请号：US09636789
申请日：2000-08-11
申请人： A. Roger Hammons, Jr. , Hehsam El Gamal
发明人： A. Roger Hammons, Jr. , Hehsam El Gamal
IPC分类号： H03M1303
CPC分类号： H03M13/296 , H03M13/2945 , H03M13/2978
摘要： An encoder, decoder, method of encoding, and method of decoding which preserves the turbo coder performance in the waterfall region, while improving upon performance in the error asymptote region, by applying a parser or other similar element to the input bit stream. The parser assigns input bits to a subset of constituent encoders in a pseudo-random fashion. The parsing strategy breaks up input sequences producing low Hamming weight error events, thereby improving the weight spectrum and asymptotic performance of the code, while not impacting waterfall region performance. The parser or other similar element may also strengthen the weight spectrum without adversely affecting convergence of a corresponding decoder.
摘要翻译：编码器，解码器，编码方法和解码方法，通过将解析器或其它类似元件应用于输入比特流，同时改善了误差渐近区域中的性能，从而保持了瀑布区域中的turbo编码器性能。解析器以伪随机方式将输入位分配给组成编码器的子集。解析策略打破了产生低汉明重量误差事件的输入序列，从而提高了码的重量谱和渐近性能，同时不影响瀑布区的性能。解析器或其他类似元素还可以加强权重谱，而不会不利地影响对应解码器的收敛。

34. 发明授权

US06487251B1 System and method for performing combined multi-rate convolutional coding 有权
标题翻译：用于执行组合多速率卷积编码的系统和方法
公开(公告)号：US06487251B1
公开(公告)日：2002-11-26
申请号：US09386053
申请日：1999-08-30
申请人： Yezdi Antia , Zhen-Liang Shi , A. Roger Hammons, Jr. , Olga Ritterbush
发明人： Yezdi Antia , Zhen-Liang Shi , A. Roger Hammons, Jr. , Olga Ritterbush
IPC分类号： H04L2701
CPC分类号： H04L1/0068 , H04L1/0041 , H04L1/007 , H04L1/08
摘要： A system and method for establishing an integrated forward error correction (FEC) scheme to perform multi-rate encoding on different priority data bits of a channel access message transmitted on a random access channel between devices of a communications network, such as between an access terminal and a base station of a satellite-based communications network. The channel access message includes a first data group representing first information and a second data group representing second information, which is transmitted between an access terminal and a base station in a satellite-based communications network. The system and method encodes the second data group at an encoding rate to provide a second encoded data group, and encodes the first data group at the same encoding rate to provide a first encoded data group. The encoding of the first and second data groups is performed by a single encoder, such as a rate ¼ convolutional encoder. The second encoded data group is transmitted from the access terminal to the base over a random access channel. The second encoded data group further can be punctured during transmission to in effect decrease its coding rate, for example, to rate ½ coding. The first encoded data group is transmitted from the access terminal to the base station, and is then retransmitted from the access terminal to the base station to in effect increase the rate of coding of the first encoded data group to, for example, ⅛ coding. At the base station, a combiner/demodulator combines the transmitted and retransmitted first encoded data group, and the combined first encoded data groups and the second encoded data group are then decoded by a decoder.
摘要翻译：一种用于建立综合前向纠错（FEC）方案的系统和方法，用于对通信网络的设备之间在诸如接入终端之间的随机接入信道上发送的信道接入消息的不同优先级数据比特执行多速率编码以及基于卫星的通信网络的基站。信道接入消息包括表示第一信息的第一数据组和表示在基于卫星的通信网络中的接入终端和基站之间传输的第二信息的第二数据组。该系统和方法以编码速率对第二数据组进行编码以提供第二编码数据组，并以相同的编码速率对第一数据组进行编码以提供第一编码数据组。第一和第二数据组的编码由单个编码器执行，例如速率¼卷积编码器。第二编码数据组通过随机接入信道从接入终端发送到基站。第二编码数据组在传输期间还可以被打孔，从而实际上降低了其编码率，例如，对1/2编码进行速率估计。第一编码数据组从接入终端发送到基站，然后从接入终端重传到基站，实际上将第一编码数据组的编码速率提高到例如1/8 编码。在基站，组合器/解调器组合发送和重传的第一编码数据组，然后由解码器解码组合的第一编码数据组和第二编码数据组。

35. 发明授权

US06430722B1 Forward error correction scheme for data channels using universal turbo codes 有权
标题翻译：使用通用turbo码的数据通道的前向纠错方案
公开(公告)号：US06430722B1
公开(公告)日：2002-08-06
申请号：US09235582
申请日：1999-01-22
申请人： Mustafa Eroz , A. Roger Hammons, Jr.
发明人： Mustafa Eroz , A. Roger Hammons, Jr.
IPC分类号： G06F1110
CPC分类号： H03M13/2957 , H03M13/036 , H03M13/2789 , H03M13/2903 , H03M13/6362 , H03M13/6381 , H04L1/0066 , H04L1/0069
摘要： A method of providing forward error correction for data services uses a parallel concatenated convolutional code which is a Turbo Code comprising a plurality of constituent encoders wherein a plurality of data block sizes are used in conjunction with said Turbo Code. A variation uses the method in a cellular radio system. Another variation uses the method in both forward and reverse links of a cellular radio system.
摘要翻译：提供用于数据业务的前向纠错的方法使用并行级联卷积码，其是包括多个构成编码器的Turbo码，其中多个数据块大小与所述Turbo码结合使用。变体使用蜂窝无线电系统中的方法。另一种变型使用蜂窝无线电系统的正向和反向链路中的方法。

36. 发明授权

US07779329B2 Method for a general near optimal turbo code trellis termination 有权
公开(公告)号：US07779329B2
公开(公告)日：2010-08-17
申请号：US11980921
申请日：2007-10-31
申请人： Mustafa Eroz , A. Roger Hammons, Jr.
发明人： Mustafa Eroz , A. Roger Hammons, Jr.
IPC分类号： H03M13/29 , H03M13/35
CPC分类号： H03M13/6362 , H03M13/2903 , H03M13/2993 , H03M13/2996 , H03M13/4123
摘要： A method of terminating two or more constituent encoders of a turbo encoder employing a turbo code, comprising the step of: generating tail input bits at each of two or more constituent encoders, including deriving the tail input bits from each of the two or more constituent encoders separately from a contents of shift registers within each of the two or more constituent encoders, after an encoding of information bits by the two or more constituent encoders; puncturing one or more tail output bits such that 1/R output tail bits are transmitted for each of a plurality of trellis branches, wherein R is a turbo code rate employed by the turbo encoder during an information bit transmission. In yet another variation, the step of puncturing the tail output bits further comprises the step of: transmitting, during trellis termination, the tail output bits, only if they are sent from an output branch of one of the two or more constituent encoders that are used during information bit transmission.

37. 发明授权

US07536624B2 Sets of rate-compatible universal turbo codes nearly optimized over various rates and interleaver sizes 有权
公开(公告)号：US07536624B2
公开(公告)日：2009-05-19
申请号：US11036477
申请日：2005-01-14
申请人： Mustafa Eroz , A. Roger Hammons, Jr.
发明人： Mustafa Eroz , A. Roger Hammons, Jr.
IPC分类号： H03M13/23 , H03M13/27 , H03M13/29 , H03M13/35
CPC分类号： H03M13/2957 , H03M13/258 , H03M13/6312 , H03M13/6381 , H04L1/005 , H04L1/0066 , H04L1/0069
摘要： A method and apparatus for Turbo encoding uses a set of rate-compatible Turbo Codes optimized at high code rates and derived from a universal constituent code. The Turbo Codes have rate-compatible puncturing patterns. The method comprises: encoding a signal at a first and second encoder using a best rate 1/2 constituent code universal with higher code rates, the first encoder and the second encoder each producing a respective plurality of parity bits for each information bit; puncturing the respective plurality of parity bits at each encoder with a higher rate best puncturing patterns; and puncturing the respective plurality of parity bits at each encoder with a lower rate best puncturing pattern. In a variation, the best rate 1/2 constituent code represents a concatenation of polynomials 1+D2+D3 (octal 13) and 1+D+D3 (octal 15), D a data bit. A Turbo Encoder is provided which has hardware to implement the method.

38. 发明授权

US07415076B2 Method and system for utilizing space-time codes for block fading channels 有权
标题翻译：用于空闲时间码用于块衰落信道的方法和系统
公开(公告)号：US07415076B2
公开(公告)日：2008-08-19
申请号：US11504898
申请日：2006-08-16
申请人： Hesham El-Gamal , A. Roger Hammons, Jr.
发明人： Hesham El-Gamal , A. Roger Hammons, Jr.
IPC分类号： H04B7/02
CPC分类号： H04L1/0059 , H04L1/0071 , H04L1/0606 , H04L1/0618 , H04L1/0637 , H04L27/18
摘要： A communication system for transmitting encoded signals over a communication channel is disclosed. The system includes a transmitter, which has a source that is configured to output a message signal, and an encoder that is configured to generate a code word in response to the message signal. The code word is based upon a stacking construction that is generalized for the communication channel. The communication channel is characterized as a multi-input multi-output (MIMO) block fading channel. The transmitter also includes a modulator that is configured to modulate the code word for transmission over the communication channel. Further, the transmitter includes a plurality of transmit antennas that are configured to transmit the modulated code word over the communication channel. The system also includes a receiver, which has a plurality of receive antennas. The receiver is configured to receive the transmitted code word via the plurality of receive antennas.
摘要翻译：公开了一种用于通过通信信道发送编码信号的通信系统。该系统包括发射机，其具有被配置为输出消息信号的源和被配置为响应于该消息信号产生码字的编码器。代码字基于通信用于通信信道的堆叠结构。通信信道被表征为多输入多输出（MIMO）块衰落信道。发射机还包括调制器，其被配置为调制用于通过通信信道传输的码字。此外，发射机包括被配置为通过通信信道发送调制码字的多个发射天线。该系统还包括具有多个接收天线的接收机。接收机被配置为经由多个接收天线接收所发送的码字。

39. 发明授权

US07042956B2 Method and system for utilizing space-time codes for block fading channels 有权
公开(公告)号：US07042956B2
公开(公告)日：2006-05-09
申请号：US10011831
申请日：2001-11-05
申请人： Hesham El-Gamal , A. Roger Hammons, Jr.
发明人： Hesham El-Gamal , A. Roger Hammons, Jr.
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04L1/0059 , H04L1/0071 , H04L1/0606 , H04L1/0618 , H04L1/0637 , H04L27/18
摘要： A communication system for transmitting encoded signals over a communication channel is disclosed. The system includes a transmitter, which has a source that is configured to output a message signal, and an encoder that is configured to generate a code word in response to the message signal. The code word is based upon a stacking construction that is generalized for the communication channel. The communication channel is characterized as a multi-input multi-output (MIMO) block fading channel. The transmitter also includes a modulator that is configured to modulate the code word for transmission over the communication channel. Further, the transmitter includes a plurality of transmit antennas that are configured to transmit the modulated code word over the communication channel. The system also includes a receiver, which has a plurality of receive antennas. The receiver is configured to receive the transmitted code word via the plurality of receive antennas.

40. 发明授权

US07012967B2 Method of generating space-time codes for generalized layered space-time architectures 有权
公开(公告)号：US07012967B2
公开(公告)日：2006-03-14
申请号：US10430002
申请日：2003-05-06
申请人： A. Roger Hammons, Jr. , Hasham El Gamal
发明人： A. Roger Hammons, Jr. , Hasham El Gamal
IPC分类号： H04B7/02
CPC分类号： H04L1/0059 , H04L1/065
摘要： Space-time codes for use with layered architectures with arbitrary numbers of antennas are provided such as rate k/n convolutional codes (e.g., rates higher than or equal to 1/n where n is the number of transmit antennas). Convolutional codes for layered space-time architectures are generated using matrices over the ring F[[D]] of formal power series in variable D.

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