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    Variable packet lengths for high packet data rate communications
    3.
    发明授权
    Variable packet lengths for high packet data rate communications 有权
    用于高分组数据速率通信的可变分组长度

    公开(公告)号：US07280562B2

    公开(公告)日：2007-10-09

    申请号：US10368887

    申请日：2003-02-18

    申请人： Nagabhushana Sindhushayana ,  Rashid A. Attar ,  Ramin Rezaiifar

    发明人： Nagabhushana Sindhushayana ,  Rashid A. Attar ,  Ramin Rezaiifar

    IPC分类号： H04J3/24

    CPC分类号： H04L12/5602 ,  H04L63/162

    摘要： Method and apparatus for variable length Physical Layer (PL) packet generation. Multiple Security Layer (SL) packets may be multiplexed into a single PL packet to increase efficiency, wherein the SL packets may have variable lengths. In one embodiment, different format SL packets for different users are combined into capsules that form the PL packet. Shorter packets are for users in poor channel conditions or requiring smaller amounts of data due to the applications and the accompanying Quality of Service (QoS) requirements. In one embodiment, a modified Preamble structure provides for Unicast or multi-user packets. Alternate embodiment provides modified Rate Sets, a mechanism for identifying ACK from a single-user packet or a multiplexed packet (delayed ACK). ON/OFF keying for ACK channel v/s bi-polar keying used in IS-856, and/or multi-valued interpretation of DRC.

    摘要翻译： 用于可变长度物理层（PL）分组生成的方法和装置。 多个安全层（SL）分组可以被多路复用到单个PL分组中以提高效率，其中SL分组可以具有可变长度。 在一个实施例中，用于不同用户的不同格式的SL分组被组合成形成PL分组的胶囊。 由于应用程序和随附的服务质量（QoS）要求，较短的数据包对于信道状况较差的用户或要求较少量的数据。 在一个实施例中，经修改的前导码结构提供单播或多用户分组。 替代实施例提供修改的速率集合，用于从单用户分组或复用分组（延迟ACK）识别ACK的机制。 IS-856中使用的ACK通道v / s双极键控的ON / OFF键控和/或DRC的多值解释。

    Rate-compatible LDPC codes
    4.
    发明授权
    Rate-compatible LDPC codes 有权
    速率兼容LDPC码

    公开(公告)号：US07702986B2

    公开(公告)日：2010-04-20

    申请号：US10299374

    申请日：2002-11-18

    申请人： Bjorn A. Bjerke ,  John W. Ketchum ,  Nagabhushana Sindhushayana ,  Jay Rod Walton

    发明人： Bjorn A. Bjerke ,  John W. Ketchum ,  Nagabhushana Sindhushayana ,  Jay Rod Walton

    IPC分类号： H03M13/00

    CPC分类号： H04L1/0057 ,  H03M13/11 ,  H03M13/6393

    摘要： Method and apparatus for generating codewords with variable length and redundancy from a single Low-Density Parity-Check (LDPC) code with variable length input words. A mother code for encoding data words is generated based on a parity-check matrix, wherein the mother code is adjusted to reflect the size of the data word to be encoded. A generator matrix applies the mother code to data words to produce codewords for transmission. In one embodiment, a reduction criteria is determined and the size of the generator matrix reduced in response. The corresponding parity-check matrix is applied at the receiver for decoding the received codeword.

    摘要翻译： 用于从具有可变长度输入字的单个低密度奇偶校验（LDPC）码生成具有可变长度和冗余的码字的方法和装置。 基于奇偶校验矩阵生成编码数据字的母码，其中调整母码以反映要编码的数据字的大小。 生成矩阵将母码应用于数据字以产生用于传输的码字。 在一个实施例中，确定减少准则并且响应地减小发电机矩阵的尺寸。 在接收机处应用相应的奇偶校验矩阵对接收的码字进行解码。

    METHOD AND APPARATUS FOR COMPUTING SOFT DECISION INPUT METRICS TO A TURBO DECODER
    5.
    发明申请
    METHOD AND APPARATUS FOR COMPUTING SOFT DECISION INPUT METRICS TO A TURBO DECODER 有权
    用于计算软件决策输入度量到涡轮解码器的方法和装置

    公开(公告)号：US20090323846A1

    公开(公告)日：2009-12-31

    申请号：US12111513

    申请日：2008-04-29

    申请人： Nagabhushana Sindhushayana

    发明人： Nagabhushana Sindhushayana

    IPC分类号： H04L5/12

    CPC分类号： H04L1/005 ,  H03M13/2957 ,  H03M13/3927 ,  H03M13/3961 ,  H03M13/6325 ,  H03M13/6337 ,  H03M13/65 ,  H04L1/0066 ,  H04L25/067 ,  H04L27/22 ,  H04L27/38

    摘要： A method and apparatus for computing soft decision input metrics to a turbo decoder includes circuits associated with eight-ary phase shift keyed (8PSK) modulation and sixteen-ary quadrature amplitude modulation (16QAM). In both implementations log-likelihood ratio (LLR) metrics on code symbols are estimated as products of various constant values and various combinations of the in-phase and quadrature components of a demodulated soft decision. In the implementation associated with the 16QAM modulation scheme, an estimate of the carrier-signal-to-interference (C/I) ratio is also used to estimate some of the LLR metrics. Estimates of the LLR metrics may also be obtained in association with generalized square QAM and M-ary PSK modulation schemes including, e.g., 64QAM, 256QAM, and 16PSK.

    摘要翻译： 用于向turbo解码器计算软判决输入度量的方法和装置包括与八进相移键控（8PSK）调制和十六进制正交幅度调制（16QAM）相关联的电路。 在两种实现中，代码符号上的对数似然比（LLR）度量被估计为解调软判决的各种常数值和同相和正交分量的各种组合的乘积。 在与16QAM调制方案相关的实现中，载波信号对干扰（C / I）比的估计也用于估计一些LLR度量。 还可以与包括例如64QAM，256QAM和16PSK的广义正​​方形QAM和M元PSK调制方案相关联地获得LLR度量的估计。

    Method and apparatus for computing soft decision input metrics to a turbo decoder
    6.
    发明授权
    Method and apparatus for computing soft decision input metrics to a turbo decoder 有权
    用于向turbo解码器计算软判决输入度量的方法和装置

    公开(公告)号：US07173974B2

    公开(公告)日：2007-02-06

    申请号：US10600889

    申请日：2003-06-20

    申请人： Nagabhushana Sindhushayana

    发明人： Nagabhushana Sindhushayana

    IPC分类号： H04L5/12

    CPC分类号： H04L1/005 ,  H03M13/2957 ,  H03M13/3927 ,  H03M13/3961 ,  H03M13/6325 ,  H03M13/6337 ,  H03M13/65 ,  H04L1/0066 ,  H04L25/067 ,  H04L27/22 ,  H04L27/38

    摘要： A method and apparatus for computing soft decision input metrics to a turbo decoder includes circuits associated with eight-ary phase shift keyed (8PSK) modulation and sixteen-ary quadrature amplitude modulation (16QAM). In both implementations log-likelihood ratio (LLR) metrics on code symbols are estimated as products of various constant values and various combinations of the in-phase and quadrature components of a demodulated soft decision. In the implementation associated with the 16QAM modulation scheme, an estimate of the carrier-signal-to-interference (C/I) ratio is also used to estimate some of the LLR metrics. Estimates of the LLR metrics may also be obtained in association with generalized square QAM and M-ary PSK modulation schemes including, e.g., 64QAM, 256QAM, and 16PSK.

    摘要翻译： 用于向turbo解码器计算软判决输入度量的方法和装置包括与八进相移键控（8PSK）调制和十六进制正交幅度调制（16QAM）相关联的电路。 在两种实现中，代码符号上的对数似然比（LLR）度量被估计为解调软判决的各种常数值和同相和正交分量的各种组合的乘积。 在与16QAM调制方案相关的实现中，载波信号对干扰（C / I）比的估计也用于估计一些LLR度量。 还可以与包括例如64QAM，256QAM和16PSK的广义正​​方形QAM和M元PSK调制方案相关联地获得LLR度量的估计。

    Method and apparatus for expanded data rate control indices in a wire less communication system
    9.
    发明申请
    Method and apparatus for expanded data rate control indices in a wire less communication system 有权
    无线通信系统中扩展数据速率控制指标的方法和装置

    公开(公告)号：US20070022396A1

    公开(公告)日：2007-01-25

    申请号：US11483269

    申请日：2006-07-06

    申请人： Rashid Attar ,  Nagabhushana Sindhushayana

    发明人： Rashid Attar ,  Nagabhushana Sindhushayana

    IPC分类号： G06F17/50 ,  H04B7/00

    CPC分类号： H04W28/22

    摘要： In one embodiment, the patent application comprises an apparatus, method and means for expanding DRC indices comprising assigning multiple DRC covers to at least one sector. In another embodiment, the apparatus, method and means for expanding DRC indices further comprises creating an expanded DRC indices list, sending a mapping of DRC covers to the expanded DRC indices list to an access terminal, and using the mapping to determine a sector and DRC index from the DRC indices list on requests for transmission from the access terminal.

    摘要翻译： 在一个实施例中，专利申请包括用于扩展DRC索引的装置，方法和装置，包括将多个DRC覆盖分配给至少一个扇区。 在另一个实施例中，用于扩展DRC索引的装置，方法和装置还包括创建扩展的DRC索引列表，向接入终端发送DRC覆盖映射到扩展的DRC索引列表，并且使用映射来确定扇区和DRC 来自DRC索引列表的从接入终端发送的请求的索引。