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    System and method for Viterbi decoding on encrypted data
    1.
    发明授权
    System and method for Viterbi decoding on encrypted data 有权
    用于加密数据维特比解码的系统和方法

    公开(公告)号：US06760438B1

    公开(公告)日：2004-07-06

    申请号：US09345419

    申请日：1999-07-01

    申请人： Yan Hui ,  Karl D. Mann

    发明人： Yan Hui ,  Karl D. Mann

    IPC分类号： H04L900

    CPC分类号： H04L1/006 ,  H04L1/0041 ,  H04L1/0054 ,  H04L1/0065 ,  H04L1/0071 ,  H04L9/065 ,  H04L2001/0098 ,  H04L2209/046 ,  H04L2209/34

    摘要： A system and method for Viterbi decoding on encrypted data is disclosed. At the receiver, maximum likelihood decoding is performed based on received input in the encryption domain. When selecting a path from one stage of a Viterbi decoding trellis to the next, a local metric may be associated with each of the possible paths based on Euclidean distance between a received symbol and a path state. The path state is determined by encrypting the binary path state. An overall metric is associated with each state equivalent to a sum of local path metrics along a survivor path of selected paths. At the end of the Viterbi decoding trellis, a decoded and decrypted bit sequence is obtained by tracing back in a conventional manner.

    摘要翻译： 公开了一种用于对加密数据进行维特比解码的系统和方法。 在接收机处，基于加密域中的接收输入执行最大似然解码。 当从维特比解码网格的一个级到下一级的路径选择时，本地度量可以基于接收到的符号和路径状态之间的欧氏距离与每个可能的路径相关联。 通过加密二进制路径状态来确定路径状态。 总体度量与相当于所选路径的幸存路径的本地路径量度的总和的每个状态相关联。 在维特比解码网格结束时，通过以常规方式追溯来获得解码和解密的比特序列。

    System and method for decryption in the symbol domain
    2.
    发明授权
    System and method for decryption in the symbol domain 失效
    用于在符号域中解密的系统和方法

    公开(公告)号：US6035040A

    公开(公告)日：2000-03-07

    申请号：US953763

    申请日：1997-10-17

    申请人： Karl D. Mann ,  Yan Hui

    发明人： Karl D. Mann ,  Yan Hui

    IPC分类号： H04K1/02 ,  H04L9/18 ,  H04L9/28

    CPC分类号： H04K1/02

    摘要： A method of decrypting data comprising encrypting bit-wise data, using a first plural bit mask, modulating the data into symbol format, and transmitting the symbol format data to a receiving apparatus, in a receiving apparatus, rotating a current received symbol sample by an amount equal to one of (i) its difference in phase from an immediately preceding received symbol sample toward the phase of the immediately preceding received symbol sample phase, and (ii) by an amount equal to estimated carrier phase towards zero phase, generating a second bit mask subset derived from values of the first bit mask, comprising plural bits for each symbol, reflecting the rotated symbol by a phase defined by the plural bits to form a symbol which is devoid of encryption, and providing the symbol devoid of encryption to a soft-decision decoder.

    摘要翻译： 一种对数据进行解密的方法，包括：在接收装置中，使用第一多位掩码，将数据调制为符号格式，并将符号格式数据发送到接收装置，将当前接收到的符号样本转换为 数量等于（i）其相对于紧接在前的接收符号样本相对于紧接在前的接收符号采样相位的相位的差异中的一个，以及（ii）等于估计的载波相位朝向零相位的量，产生第二 从第一位掩码的值导出的位掩码子集，其包括每个符号的多个比特，通过由多个比特定义的相位反射旋转的符号，以形成没有加密的符号，并将缺少加密的符号提供给 软判决解码器。

    Method and apparatus for load shedding in a TDMA packet data system
    3.
    发明授权
    Method and apparatus for load shedding in a TDMA packet data system 失效
    TDMA分组数据系统中负载脱落的方法和装置

    公开(公告)号：US6111867A

    公开(公告)日：2000-08-29

    申请号：US989821

    申请日：1997-12-12

    申请人： Karl D. Mann ,  Shamim Akbar Rahman ,  Kamel M. Shaheen

    发明人： Karl D. Mann ,  Shamim Akbar Rahman ,  Kamel M. Shaheen

    IPC分类号： H04W72/04 ,  H04B7/212 ,  H04Q7/20

    CPC分类号： H04W72/02 ,  H04W48/16 ,  H04W72/0486

    摘要： A system implements a method of allocating a mobile communications device, such as a mobile end station, to packet channels, such as packet control channels within a cell. A mobile communications device identifies for access a packet channel by executing an algorithm, such as a hashing algorithm. The mobile communications device then reads a loading message broadcast for that packet channel. If the loading message indicates to the mobile communications device that another packet channel or PCCH should be sought, the mobile communications device tunes to a beacon frequency and reads information for each packet channel or PCCH broadcast at the beacon frequency. The mobile then tunes to a suitable channel. The processing to select a suitable channel is accomplished in the mobile communications device, thereby relieving other system elements, such as the mobile data base station (MDBS) from carrying out that processing and reducing the information traffic on overloaded channels.

    摘要翻译： 系统实现将诸如移动终端站的移动通信设备分配给诸如小区内的分组控制信道的分组信道的方法。 移动通信设备通过执行诸如散列算法的算法来标识用于访问分组信道。 然后，移动通信设备读取用于该分组信道的加载消息广播。 如果加载消息向移动通信设备指示应该寻求另一分组信道或PCCH，则移动通信设备调谐到信标频率，并且以信标频率读取每个分组信道或PCCH广播的信息。 移动台然后调谐到合适的频道。 在移动通信设备中完成选择合适的信道的处理，从而减轻诸如移动数据基站（MDBS）的其他系统元件的执行，并减少重载信道上的信息流量。

    Method and apparatus for transmitting real-time data in multi-access systems
    4.
    发明授权
    Method and apparatus for transmitting real-time data in multi-access systems 有权
    用于在多址系统中传输实时数据的方法和装置

    公开(公告)号：US07027989B1

    公开(公告)日：2006-04-11

    申请号：US09465318

    申请日：1999-12-17

    申请人： Indranil Bob Tapadar ,  Karl D. Mann ,  Chung-Cheung C. Chu ,  Pierre P. Gendron

    发明人： Indranil Bob Tapadar ,  Karl D. Mann ,  Chung-Cheung C. Chu ,  Pierre P. Gendron

    IPC分类号： G10L21/04

    CPC分类号： H04L12/66 ,  G10L19/00 ,  G10L25/78

    摘要： The invention provides a method and apparatus for transmitting real-time data in a multi-access system which eliminates clipping of the data while reducing transmission delays. The invention can be incorporated in any multi-access system where transmission resources are allocated when there is information to transmit. In a preferred embodiment, the invention is incorporated in a multi-access wireless system for the upstream transmission of voice from a mobile station to a base station. Each speech segment received at the mobile is shortened by appropriate editing and buffered until transmission. By editing and buffering speech segments as they are received, clipping can be eliminated while reducing transmission delays.

    摘要翻译： 本发明提供一种用于在多址系统中发送实时数据的方法和装置，其消除了在减少传输延迟的同时减少数据。 当存在要发送的信息时，本发明可以被并入到其中分配传输资源的任何多址系统中。 在优选实施例中，本发明被并入用于语音从移动站到基站的上行传输的多址无线系统中。 通过适当的编辑缩短在移动台处接收到的每个语音段，直到传输。 通过在接收到语音段时进行编辑和缓冲，可以减少削波，同时减少传输延迟。

    Mobile speed estimation for digital cellular radio systems
    5.
    发明授权
    Mobile speed estimation for digital cellular radio systems 有权
    数字蜂窝无线电系统的移动速度估计

    公开(公告)号：US06370357B1

    公开(公告)日：2002-04-09

    申请号：US09217064

    申请日：1998-12-21

    申请人： Chengshan Xiao ,  Karl D. Mann ,  Jan C. Olivier

    发明人： Chengshan Xiao ,  Karl D. Mann ,  Jan C. Olivier

    IPC分类号： H04B1700

    CPC分类号： G01S11/10 ,  G01S11/06 ,  H04W36/04

    摘要： For a hierarchical mobile cellular communications system comprising a plurality of microcells and overlaid macrocells, a method is disclosed for estimating the speed of a mobile. The speed estimate assists in the assignment of slow-moving mobiles to microcells and fast-moving mobiles to macrocells, thus keeping the cellular system in optimum utilization. The method first calculates a power signal of the received signals. The power signal is then filtered and decimated. The speed of a mobile is estimated from a determination of the offset autocorrelation of the filtered and decimated power signal.

    摘要翻译： 对于包括多个微小区和重叠的宏小区的分级移动蜂窝通信系统，公开了一种用于估计移动台的速度的方法。 速度估计有助于将缓慢移动的移动站分配给微小区和快速移动的移动站到宏小区，从而保持蜂窝系统的最佳利用。 该方法首先计算接收信号的功率信号。 然后对功率信号进行滤波和抽取。 从确定滤波和抽取的功率信号的偏移自相关来估计移动台的速度。

    Performing handoff of a mobile station between different types of wireless network controllers
    6.
    发明授权
    Performing handoff of a mobile station between different types of wireless network controllers 有权
    在不同类型的无线网络控制器之间执行移动台的切换

    公开(公告)号：US08577370B1

    公开(公告)日：2013-11-05

    申请号：US12028511

    申请日：2008-02-08

    申请人： Karl D. Mann ,  Michael Pate ,  Vijay Kesavarapu ,  Sandra L. Foster ,  Azeem Ahmad ,  Henry Lee ,  Jiangbin Yang ,  Eric W. Parsons

    发明人： Karl D. Mann ,  Michael Pate ,  Vijay Kesavarapu ,  Sandra L. Foster ,  Azeem Ahmad ,  Henry Lee ,  Jiangbin Yang ,  Eric W. Parsons

    IPC分类号： H04W36/00 ,  H04W24/00 ,  H04W4/00 ,  H04M1/00

    CPC分类号： H04W36/0066 ,  H04W36/0094

    摘要： To perform handoff of a mobile station from a source wireless network controller of one wireless access technology to a target wireless network controller of a different wireless access technology, a first message for initiating a handoff is sent from the source wireless network controller to the target wireless network controller. The source wireless network controller receives, from the target wireless network controller, a second message responsive to the first message, where the second message contains information to enable identification of cell segments neighboring the target wireless network controller for which signal strength measurements are to be performed. In response to the second message, signal strength measurements made by the mobile station are received by the target wireless network controller.

    摘要翻译： 为了执行移动站从一个无线接入技术的源无线网络控制器切换到不同无线接入技术的目标无线网络控制器，用于发起切换的第一消息从源无线网络控制器发送到目标无线 网络控制器 源无线网络控制器从目标无线网络控制器接收响应于第一消息的第二消息，其中第二消息包含信息以使得能够识别邻近目标无线网络控制器的信元强度测量将被执行的小区段 。 响应于第二消息，移动台进行的信号强度测量由目标无线网络控制器接收。

    Transmitted signal power control in cellular communications systems
    9.
    发明授权
    Transmitted signal power control in cellular communications systems 有权
    蜂窝通信系统中的传输信号功率控制

    公开(公告)号：US06418137B1

    公开(公告)日：2002-07-09

    申请号：US09210364

    申请日：1998-12-14

    申请人： Chandra Sekhar Bontu ,  Shavantha Kularatna ,  N. Gamini Senarath ,  Karl D. Mann ,  Peter Anthony Barany

    发明人： Chandra Sekhar Bontu ,  Shavantha Kularatna ,  N. Gamini Senarath ,  Karl D. Mann ,  Peter Anthony Barany

    IPC分类号： H04B7212

    CPC分类号： H04W52/367 ,  H04W52/24 ,  H04W52/362

    摘要： A base station produces a power control bit dependent on SNR (signal-to-noise ratio) determined for each time slot of a signal received from a remote station of a cellular communications system. If the SNR exceeds an upper threshold by an upper threshold margin, the power control bit is a binary 0 and the upper threshold margin is increased; if the SNR is below a lower threshold by a lower threshold margin, the power control bit is a binary 1 and the lower threshold margin is increased; and otherwise the power control bit alternates its binary value for successive time slots and setting the threshold margins are reset. In the remote station, the power control bits are accumulated by a bidirectional counter and the transmitted signal power is only changed up or down in response to the count exceeding a respective threshold. The process can also or instead be used for the opposite transmission direction, and provides fast power control using a single bit per time slot in a manner that is tolerant of errors in the transmitted power control bits.

    摘要翻译： 基站产生取决于从蜂窝通信系统的远程站接收的信号的每个时隙确定的SNR（信噪比）的功率控制位。 如果SNR超过上限阈值上限阈值，则功率控制位为二进制0，上限阈值增加; 如果SNR低于阈值下限阈值，则功率控制位为二进制1，下限阈值增加; 否则功率控制位会对连续时隙交替其二进制值，并且设置阈值余量被重置。 在远程站中，功率控制位由双向计数器累积，并且响应于超过相应阈值的计数，发送的信号功率仅被上升或下降。 该过程也可以或替代地用于相反的传输方向，并且以容纳发射功率控制位中的错误的方式提供使用每个时隙的单个位的快速功率控制。