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    System and method for providing variable security level in a wireless communication system
    6.
    发明申请
    System and method for providing variable security level in a wireless communication system 有权
    在无线通信系统中提供可变安全级别的系统和方法

    公开(公告)号：US20070140494A1

    公开(公告)日：2007-06-21

    申请号：US11241429

    申请日：2005-09-30

    申请人： Akinlolu Kumoluyi ,  Alexander Reznik ,  Guodong Zhang ,  Prabhakar Chitrapu ,  Sung-Hyuk Shin ,  Yingming Tsai

    发明人： Akinlolu Kumoluyi ,  Alexander Reznik ,  Guodong Zhang ,  Prabhakar Chitrapu ,  Sung-Hyuk Shin ,  Yingming Tsai

    IPC分类号： H04K1/00

    CPC分类号： H04W12/08 ,  H04L9/088 ,  H04L63/04 ,  H04L63/105 ,  H04L63/1441 ,  H04L63/20 ,  H04L2209/80 ,  H04W12/04 ,  H04W12/12

    摘要： A system and method for providing variable security levels in a wireless communication network. The present invention optimizes the often conflicting demands of highly secure wireless communications and high speed wireless communications. According to a preferred embodiment of the present invention, various security sensors are scanned to determine the likely presence of an intruder within a predetermined trust zone. If an intruder is likely present, the security level is changed to the highest setting, and consequently a lower data rate, while the intruder is identified. If the identified intruder is in fact a trusted node, the security level is returned to a lower setting. If the identified intruder is not a trusted node, the security level is maintained at an elevated state while the intruder is within the trust zone.

    摘要翻译： 一种用于在无线通信网络中提供可变安全级别的系统和方法。 本发明优化了高度安全的无线通信和高速无线通信的经常冲突的需求。 根据本发明的优选实施例，扫描各种安全传感器以确定入侵者在预定信任区域内的可能存在。 如果入侵者可能存在，则安全级别将更改为最高设置，从而更低的数据速率，同时入侵者被识别。 如果识别的入侵者实际上是可信节点，那么安全级别将返回到较低的设置。 如果识别的入侵者不是可信节点，则入侵者在信任区域内时，安全级别保持在升高的状态。

    Method and apparatus for securing wireless communications
    8.
    发明申请
    Method and apparatus for securing wireless communications 审中-公开
    用于确保无线通信的方法和装置

    公开(公告)号：US20070053325A1

    公开(公告)日：2007-03-08

    申请号：US11409668

    申请日：2006-04-24

    申请人： Sung-Hyuk Shin ,  Yogendra Shah ,  Prabhakar Chitrapu ,  Alain Briancon

    发明人： Sung-Hyuk Shin ,  Yogendra Shah ,  Prabhakar Chitrapu ,  Alain Briancon

    IPC分类号： H04B7/216

    CPC分类号： H04K1/00

    摘要： A method and apparatus for securing wireless communications are disclosed. A watermark message is encoded to watermark message symbols. A cover message is encoded to cover message symbols. The watermark message symbols are then overlaid onto the cover message symbols to generate a watermark-embedded cover message in a physical layer. The watermark message symbols have a substantially lower amplitude than the cover message symbols. Thus, the watermark message introduces small perturbation around the constellation points of the cover message symbols. The watermark message symbol may span or spread over a plurality of cover message symbols and may be encrypted with a secret key. The watermark message is used for improving receiver performance by transmitting additional information or for security enhancement purposes. The watermarking function may be selectively turned on and off.

    摘要翻译： 公开了一种用于确保无线通信的方法和装置。 水印消息被编码为水印消息符号。 封面信息被编码以覆盖消息符号。 然后将水印消息符号覆盖到封面消息符号上，以在物理层中生成嵌入水印的封面消息。 水印消息符号具有比覆盖消息符号大得多的幅度。 因此，水印消息在覆盖消息符号的星座点周围引入小的扰动。 水印消息符号可以覆盖多个封面消息符号并且可以用秘密密钥加密。 水印消息用于通过发送附加信息或为了安全增强目的来改善接收机性能。 可以选择性地打开和关闭水印功能。

    METHOD AND APPARATUS FOR IMPROVED SPATIAL TEMPORAL TURBO CHANNEL CODING (STTCC) USING EIGEN-BEAMFORMING
    10.
    发明申请
    METHOD AND APPARATUS FOR IMPROVED SPATIAL TEMPORAL TURBO CHANNEL CODING (STTCC) USING EIGEN-BEAMFORMING 失效
    用于改进空间波纹通道编码（STTCC）的方法和装置使用EIGEN-BEAMFORMING

    公开(公告)号：US20070291868A1

    公开(公告)日：2007-12-20

    申请号：US11760266

    申请日：2007-06-08

    申请人： Robert Olesen ,  Sung-Hyuk Shin

    发明人： Robert Olesen ,  Sung-Hyuk Shin

    IPC分类号： H04L1/02

    CPC分类号： H04L1/0041 ,  H04B7/0434 ,  H04B7/0478 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0066 ,  H04L1/06

    摘要： The present invention is a method and apparatus for improving the performance of spatial temporal turbo channel coding (STTCC) used in multiple-input multiple-output (MIMO) wireless communication systems called eigen-STTCC (E-STTCC) that employs eigen-beamforming to make use of orthogonal eigen streams in the MIMO channel. Singular value decomposition (SVD) is applied to the channel matrix producing a linear precoding matrix containing the orthonormal basis for the eigen streams. In a first embodiment, the turbo encoded codeword containing concatenated systematic and parity bits is precoded with the linear precoding matrix such that the systematic bits are transmitted over the eigen streams with highest power. In a second embodiment, the codeword is made up of interleaved systematic bits and parity bits prior to eigen beamform preceding, effectively interleaving the systematic and data bits spatially over the eigen streams. In an alternate embodiment, the data stream is interleaved at the input to the encoder.

    摘要翻译： 本发明是一种用于改善在称为特征STTCC（E-STTCC）的多输入多输出（MIMO）无线通信系统中使用的空间时间turbo信道编码（STTCC）的性能的方法和装置，其使用特征波束形成 利用MIMO信道中的正交本征流。 将奇异值分解（SVD）应用于产生包含本征流的正交基的线性预编码矩阵的信道矩阵。 在第一实施例中，包含连接的系统和奇偶校验位的turbo编码码字用线性预编码矩阵进行预编码，使得系统比特在具有最高功率的本征流上传输。 在第二实施例中，码字由在本征波束形成之前的交织的系统比特和奇偶校验位组成，有效地将系统和数据比特空间地交织在本征流上。 在替代实施例中，数据流在编码器的输入处交错。