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    Reverse link correlation filter in wireless communication systems
    81.
    发明申请
    Reverse link correlation filter in wireless communication systems 有权
    无线通信系统中的反向链路相关滤波器

    公开(公告)号：US20010030990A1

    公开(公告)日：2001-10-18

    申请号：US09738934

    申请日：2000-12-15

    申请人： TANTIVY Communications Inc.

    发明人： Antoine J. Rouphael ,  John E. Hoffmann ,  George Rodney Nelson JR. ,  Samir K. Patel ,  James A. Proctor JR. ,  Daniel I. Riley

    IPC分类号： H04K001/00 ,  H04B015/00 ,  H04L027/30

    CPC分类号： H04B1/707 ,  H04B1/7105 ,  H04B1/712 ,  H04B2201/70703 ,  H04B2201/70705 ,  H04B2201/7071

    摘要： A single, common correlation filter (CF) core is provided in a wireless system using CDMA. A plurality of channels with different data rates are provided in the wireless system. The channels provided in the wireless system include the access channel, the maintenance channel, and the traffic channel in which information (e.g., pilot or data symbols or both) is transmitted at the tier 1, tier 2 and tier 3 rates. The data rate for transmitting the information is programmable by digital signal processor (DSP). A user-unique code, such as a PN code, is applied to the information being transmitted in the channels of the wireless system. The information is QPSK modulated and transmitted in any one of the channels at any data rate. The transmitted information is correlated at the smallest data rate (i.e., the tier 1 rate) in the correlation filter (CF) of the wireless system by time multiplexing delayed versions of the PN code to the correlation filter core. The correlated information is then demultiplexed and pilot aided QPSK demodulated. The demodulated information is summed at the proper integer multiple of the tier 1 rate to achieve the tier 2 and tier 3 rates. The three strongest multipaths (in terms of the received power) are selected in a window or time period for optimal information recovery. Furthermore, three outputs from the demodulated information can be provided and combined for temporal diversity. Spatial diversity is achieved by providing a plurality of antennas at each receiver and a single, common correlation filter at each of the plurality of antennas of the receivers in the wireless system.

    摘要翻译： 在使用CDMA的无线系统中提供单个公共相关滤波器（CF）核。 在无线系统中提供具有不同数据速率的多个信道。 在无线系统中提供的信道包括接入信道，维护信道和业务信道，信道（例如，导频或数据符号或两者）以层1，层2和层3速率被传输。 用于传输信息的数据速率可由数字信号处理器（DSP）编程。 诸如PN码的用户唯一码被应用于在无线系统的频道中发送的信息。 该信息以任何数据速率在任何一个信道中进行QPSK调制和传输。 所发送的信息通过将PN码的延迟版本时间复用到相关滤波器核心，以无线系统的相关滤波器（CF）中的最小数据速率（即，层1速率）相关。 然后将相关信息解复用并进行导频辅助QPSK解调。 解调信息以1级速率的适当整数倍相加，以实现2级和3级速率。 在窗口或时间段中选择三个最强的多路径（以接收功率计），以获得最佳信息恢复。 此外，可以提供来自解调信息的三个输出并将其组合用于时间分集。 通过在每个接收机处提供多个天线以及在无线系统中的接收机的多个天线的每个天线处提供单个公共相关滤波器来实现空间分集。

    Wireless communication device and method of predicting a frame rate in a CDMA communication system
    82.
    发明申请
    Wireless communication device and method of predicting a frame rate in a CDMA communication system 失效
    无线通信装置及CDMA通信系统中的帧速率预测方法

    公开(公告)号：US20010004356A1

    公开(公告)日：2001-06-21

    申请号：US09730545

    申请日：2000-12-07

    申请人： NEC CORPORATION

    发明人： Ulrich Faber

    IPC分类号： H04B007/216

    CPC分类号： H04B1/7087 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/709 ,  H04B2201/70705

    摘要： In a method of controlling a searcher used in a wireless communication device supplied with a sequence of baseband reception data signals divisible into a sequence of frames, a current frame and preceding frames are selected which satisfy a first relationship. A current and preceding frame rates are statistically processed to obtain frequencies of combinations of the current and the preceding frame rates and to store the frequencies. The first relationship is determined by a difference between a processing time of correlators and the like and a delay time of a delay unit. A next frame search rate judgement portion statistically processes frequencies of combinations of the current and the preceding frame rates so as to calculate a next frame rate candidate in accordance with the first relationship. The next frame rate is predicted by using the next frame rate candidate with reference to a second relationship similar to the first relationship.

    摘要翻译： 在控制在被提供有可分为帧序列的基带接收数据信号序列的无线通信装置中使用的搜索器的方法中，选择满足第一关系的当前帧和先前帧。 统计处理当前和前一帧速率以获得当前帧和前一帧速率的组合的频率并存储频率。 第一关系由相关器的处理时间等与延迟单元的延迟时间之间的差确定。 下一帧搜索率判断部分统计处理当前帧和前一帧速率的组合的频率，以便根据第一关系计算下一个帧速率候选。 参考与第一关系类似的第二关系，通过使用下一个帧速率候选来预测下一个帧速率。

    Method and apparatus for rate determination in a communication system
    83.
    发明授权
    Method and apparatus for rate determination in a communication system 失效
    通信系统中速率确定的方法和装置

    公开(公告)号：US5878098A

    公开(公告)日：1999-03-02

    申请号：US672155

    申请日：1996-06-27

    申请人： Michael M. Wang ,  Fuyun Ling ,  Terry M. Schaffner

    发明人： Michael M. Wang ,  Fuyun Ling ,  Terry M. Schaffner

    IPC分类号： H04B1/74 ,  H03M13/23 ,  H03M13/41 ,  H04B17/00 ,  H04J13/00 ,  H04L1/00 ,  H04L27/00

    CPC分类号： H04L1/0054 ,  H03M13/3961 ,  H03M13/41 ,  H04L1/0046 ,  H04B2201/70705

    摘要： A method of determining a rate associated with a received signal including the steps of detecting the received signal (40); decoding the received signal at a first rate, determining a first path metric associated with the first rate, decoding the received signal at a second rate, and determining a second path metric associated with the second rate (44); calculating a plurality of discriminant functions based on the first and second path metrics (46); comparing at least one of the plurality of discriminant functions to a first predetermined value (48); and selecting one of the first and second rates as a determined rate based on the comparison.

    摘要翻译： 一种确定与接收信号相关联的速率的方法，包括检测接收信号的步骤; 以第一速率对接收到的信号进行解码，确定与第一速率相关联的第一路径度量，以第二速率解码接收到的信号，以及确定与第二速率相关联的第二路径度量（44）。 基于所述第一和第二路径量度（46）计算多个判别函数; 将所述多个判别函数中的至少一个与第一预定值（48）进行比较; 并且基于所述比较来选择所述第一和第二速率中的一个作为确定的速率。

    Variable rate communication method and a variable rate communication system
    85.
    发明授权
    Variable rate communication method and a variable rate communication system 失效
    可变速率通信方法和可变速率通信系统

    公开(公告)号：US5627845A

    公开(公告)日：1997-05-06

    申请号：US271668

    申请日：1994-07-07

    申请人： Nobuo Asano ,  Osamu Kato

    发明人： Nobuo Asano ,  Osamu Kato

    IPC分类号： H03M13/41 ,  H03M13/23 ,  H04J3/22 ,  H04L1/00 ,  H04L1/08 ,  H04L25/02 ,  H04L29/08 ,  G06F11/10

    CPC分类号： H04L1/0046 ,  H04J3/22 ,  H04L1/0054 ,  H04L1/08 ,  H04L25/0262 ,  H04B2201/70705

    摘要： In variable bit rate communications in which the information rate changes at B/2.sup.n (where n is 0 or a positive integer) in each frame when the maximum information rate is B, at the transmitter side, information data is convolution coded in order to carry out an error correction of the information data, and when n.gtoreq.1, coded data is repeatedly transmitted by (2.sup.n -1) times. At the receiver side, the information rate is detected from the transmission data that has been received, and when carrying out Viterbi decoding, an information rate is estimated by utilizing the repetition characteristics of the data, so that the coded data is Viterbi decoded for only the estimated bit rate, to thereby restrict an increase in the power consumption of mobile terminal units that are driven by batteries.

    摘要翻译： 在最大信息速率为B时，在每帧中B / 2n（其中n为0或正整数）的信息速率变化的可变比特率通信中，在发送方，信息数据被卷积编码以便携带 输出信息数据的纠错，当n> / = 1时，通过（2n-1）次重复发送编码数据。 在接收侧，从接收到的发送数据中检测出信息速率，当进行维特比解码时，利用数据的重复特性来估计信息速率，使编码数据仅被维特比解码 估计的比特率，从而限制由电池驱动的移动终端单元的功耗的增加。

    CONVOLUTIONALLY ENCODING AND DECODING MULTIPLE DATA STREAMS
    90.
    发明申请
    CONVOLUTIONALLY ENCODING AND DECODING MULTIPLE DATA STREAMS 审中-公开
    多变量编码和解码多个数据流

    公开(公告)号：US20120063490A1

    公开(公告)日：2012-03-15

    申请号：US13300007

    申请日：2011-11-18

    申请人： John D. Kaewell, JR.

    发明人： John D. Kaewell, JR.

    IPC分类号： H04B1/707

    CPC分类号： H04L1/006 ,  H03M13/256 ,  H03M13/4107 ,  H03M13/4169 ,  H03M13/6502 ,  H04B1/707 ,  H04B2201/70703 ,  H04B2201/70705 ,  H04L1/0009 ,  H04L1/0046 ,  H04L1/0052 ,  H04L1/0054 ,  H04L1/08

    摘要： A plurality of data streams are convolutionally encoded. Each convolutionally encoded data stream has a particular data rate. The particular data rate of each data stream is adjusted so that an adjusted data rate of that data stream matches a data rate of a CDMA transmission. When the particular data rate of one of the data streams is below the data rate of the CDMA transmission, data of the one data stream is repeated to match the data rate of the CDMA transmission. The adjusted data rate data streams is transmitted as the CDMA transmission. The adjusted data streams are transmitted together in the CDMA transmission and the CDMA transmission is quadrature modulated.

    摘要翻译： 多个数据流被卷积编码。 每个卷积编码的数据流具有特定的数据速率。 调整每个数据流的特定数据速率，使得该数据流的经调整的数据速率与CDMA传输的数据速率相匹配。 当其中一个数据流的特定数据速率低于CDMA传输的数据速率时，重复一个数据流的数据以匹配CDMA传输的数据速率。 经调整的数据速率数据流作为CDMA传输被发送。 经调整的数据流在CDMA传输中一起发送，并且CDMA传输被正交调制。