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18 条记录 (耗时 0.026 秒)

    Adaptive sectorization in a spread spectrum communication system
    1.
    发明授权
    Adaptive sectorization in a spread spectrum communication system 失效
    扩频通信系统中的自适应扇区化

    公开(公告)号：US5621752A

    公开(公告)日：1997-04-15

    申请号：US265664

    申请日：1994-06-23

    申请人： Franklin P. Antonio ,  Klein S. Gilhousen ,  Jack K. Wolf ,  Ephraim Zehavi

    发明人： Franklin P. Antonio ,  Klein S. Gilhousen ,  Jack K. Wolf ,  Ephraim Zehavi

    IPC分类号： H01Q3/24 ,  H01Q3/26 ,  H04B1/7085 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/26 ,  H04L1/06 ,  H04W16/28 ,  H04B15/00 ,  H04K1/00 ,  H04L27/30

    CPC分类号： H04W16/28 ,  H04B1/7085 ,  H04B1/712 ,  H04B1/7117

    摘要： A system and method for adaptively sectorizing channel resources within a digital cellular communication system is disclosed herein. The system includes an antenna arrangement for providing at least first and second electromagnetic beams for receiving a first information signal transmitted by a specific one of a plurality of users, thereby generating first and second received signals. A first set of beam-forming signals are then generated from the first and second received signals. A demodulating receiver is provided for demodulating at least first and second beam-forming signals included within the first set of beam-forming signals, thereby producing first and second demodulated signals. The system further includes a tracking network for tracking multipath information signals, received from various positions and angles of incidence, based on comparison of the first and second demodulated signals.

    摘要翻译： 本文公开了一种用于在数字蜂窝通信系统内自适应地划分信道资源的系统和方法。 该系统包括用于提供至少第一和第二电磁波束的天线装置，用于接收由多个用户中的特定一个用户发送的第一信息信号，从而产生第一和第二接收信号。 然后从第一和第二接收信号产生第一组波束形成信号。 解调接收机被提供用于解调包括在第一组波束形成信号内的至少第一波束形成信号和第二波束形成信号，从而产生第一和第二解调信号。 基于第一和第二解调信号的比较，系统还包括用于跟踪从各种位置和入射角接收的多路径信息信号的跟踪网络。

    Trellis encoder and decoder based upon punctured rate 1/2 convolutional codes
    3.
    发明授权
    Trellis encoder and decoder based upon punctured rate 1/2 convolutional codes 失效
    网格编码器和解码器基于穿孔率+ E，fra 1/2 + EE卷积码

    公开(公告)号：US5633881A

    公开(公告)日：1997-05-27

    申请号：US368738

    申请日：1995-01-04

    申请人： Ephraim Zehavi ,  Jack K. Wolf

    发明人： Ephraim Zehavi ,  Jack K. Wolf

    IPC分类号： H03M13/25 ,  H04L1/00 ,  G06F11/10

    CPC分类号： H04L1/0068 ,  H03M13/25 ,  H03M13/256 ,  H03M13/3961 ,  H03M13/6362 ,  H04L1/0054 ,  H04L1/0059 ,  H04L1/006

    摘要： An encoder for encoding data as trellis coded data and a decoder for decoding the trellis coded data. The encoder uses a rate 1/2 convolutional encoder punctured to a rate k/n to produce n symbols from k input bits. The symbols are converted by a converter to sets of p symbols and provided to an interleaver. In the interleaver certain ones of the symbols are delayed. Symbol sets are output from the interleaver to a 2.sup.P -ary modem for modulation and transmission. The decoder uses a modem for providing from the modulated data sets of p symbols. A deinterleaver delays certain ones of the symbols to achieve time alignment of the originally interleaved symbols. The sets of time aligned symbols are provided to metric calculators for computing signal metrics which are provided to a converter for providing n sets of metrics to a metric decoder. The metric decoder computes from the n sets of metrics an estimate of the encoded k data bits.

    摘要翻译： 用于将数据编码为网格编码数据的编码器和用于解码网格编码数据的解码器。 编码器使用从速率k / n穿过的速率+ E，fra 1/2 + EE卷积编码器，从k个输入位产生n个符号。 符号由转换器转换成p个符号的集合并提供给交织器。 在交织器中某些符号被延迟。 符号集从交织器输出到用于调制和传输的2P型调制解调器。 解码器使用调制解调器从p符号的调制数据集中提供。 解交织器延迟某些符号以实现原始交织符号的时间对准。 将时间对齐符号的集合提供给度量计算器，用于计算提供给转换器的信号度量，以向度量解码器提供n组度量。 度量解码器从n个度量值计算编码的k个数据比特的估计。

    Trellis encoder and decoder based upon punctured rate ½ convolutional codes
    5.
    再颁专利
    Trellis encoder and decoder based upon punctured rate ½ convolutional codes 有权
    网格编码器和解码器基于穿孔率½卷积码

    公开(公告)号：USRE38010E1

    公开(公告)日：2003-02-25

    申请号：US09305328

    申请日：1999-05-04

    申请人： Ephraim Zehavi ,  Jack K. Wolf

    发明人： Ephraim Zehavi ,  Jack K. Wolf

    IPC分类号： G06F1110

    CPC分类号： H04L1/0068 ,  H03M13/25 ,  H03M13/256 ,  H03M13/3961 ,  H03M13/6362 ,  H04L1/0054 ,  H04L1/0059 ,  H04L1/006

    摘要： An encoder for encoding data as trellis coded data and a decoder for decoding the trellis coded data. The encoder uses a rate ½ convolutional encoder punctured to a rate k/n to produce n symbols from k input bits. The symbols are converted by a converter to sets of p symbols and provided to an interleaver. In the interleaver certain ones of the symbols are delayed. Symbol sets are output from the interleaver to a 2P-ary modem for modulation and transmission. The decoder uses a modem for providing from the modulated data sets of p symbols. A deinterleaver delays certain ones of the symbols to achieve time alignment of the originally interleaved symbols. The sets of time aligned symbols are provided to metric calculators for computing signal metrics which are provided to a converter for providing n sets of metrics to a metric decoder. The metric decoder computes from the n sets of metrics an estimate of the encoded k data bits.

    摘要翻译： 用于将数据编码为网格编码数据的编码器和用于解码网格编码数据的解码器。 编码器使用以比特率k / n打比的速率1/2卷积编码器从k个输入比特产生n个符号。 符号由转换器转换成p个符号的集合并提供给交织器。 在交织器中某些符号被延迟。 符号集从交织器输出到用于调制和传输的2P型调制解调器。 解码器使用调制解调器从p符号的调制数据集中提供。 解交织器延迟某些符号以实现原始交织符号的时间对准。 将时间对齐符号的集合提供给度量计算器，用于计算提供给转换器的信号度量，以向度量解码器提供n组度量。 度量解码器从n个度量值计算编码的k个数据比特的估计。

    TAIL-BITING CONVOLUTIONAL DECODING
    8.
    发明申请
    TAIL-BITING CONVOLUTIONAL DECODING 失效
    尾随转换解码

    公开(公告)号：US20110280345A1

    公开(公告)日：2011-11-17

    申请号：US12778605

    申请日：2010-05-12

    申请人： Dung N. Doan ,  Jack K. Wolf ,  Yongbin Wei

    发明人： Dung N. Doan ,  Jack K. Wolf ,  Yongbin Wei

    IPC分类号： H04L27/06

    CPC分类号： H03M13/413 ,  H03M13/6525

    摘要： Methods and apparatuses for enhanced processing of received channels in a mobile communications system is described. Particularly, convolutionally encoded tail biting data in a mobile communications system is efficiently decoding by replicating the received encoded signal N times, where N equals a number of iterations. A Viterbi decoding algorithm is applied and a most likely survivor path is obtained. The ensuing decoding window is set as a fixed decoding window and placed at a mid-section of the most likely survivor path. Simulations have shown codeword accuracy to be comparable to MLSE with less complexity. A high degree of accuracy has been obtained for N=3.

    摘要翻译： 描述了用于移动通信系统中的接收信道的增强处理的方法和装置。 特别地，在移动通信系统中卷积编码的尾巴数据通过复制所接收的编码信号N次而有效地进行解码，其中N等于迭代次数。 应用维特比解码算法，获得最可能的幸存路径。 随后的解码窗口被设置为固定解码窗口并且被放置在最可能的幸存路径的中间部分。 仿真结果表明，码字精度与MLSE相当，复杂度较低。 对于N = 3，获得了高度的准确度。

    Method and apparatus for resolving phase ambiguities in trellis coded modulated data
    9.
    发明授权
    Method and apparatus for resolving phase ambiguities in trellis coded modulated data 失效
    用于解决TRELLIS编码调制数据中相位优化的方法和装置

    公开(公告)号：US5233630A

    公开(公告)日：1993-08-03

    申请号：US695397

    申请日：1991-05-03

    申请人： Jack K. Wolf

    发明人： Jack K. Wolf

    IPC分类号： H03M13/25 ,  H03M13/41 ,  H04L27/18

    CPC分类号： H03M13/256 ,  H03M13/25 ,  H03M13/41 ,  H04L27/186

    摘要： A codec for resolving transmission phase ambiguities in the M-ary PSK modulation of trellis coded data. A trellis encoder uses a differential encoder and a convolutional encoder, along with multiplexed differential encoders, to generate from sets of input data bits corresponding phase point values for use in M-ary PSK carrier modulation. A trellis decoder uses a Viterbi decoder and a differential decoder, along with multiplexed differential decoders, to produce estimates of the original input data bits from the received signal sector value.

    摘要翻译： 用于解决网格编码数据的M-ary PSK调制中的传输相位模糊的编解码器。 网格编码器使用差分编码器和卷积编码器以及多路复用差分编码器，从用于M-ary PSK载波​​调制的对应相位值的输入数据位组中产生。 网格解码器使用维特比解码器和差分解码器以及多路复用差分解码器，以从接收的信号扇区值产生原始输入数据比特的估计。

    Method and an apparatus for use of codes in multicast transmission
    10.
    发明授权
    Method and an apparatus for use of codes in multicast transmission 有权
    多播传输中使用代码的方法和装置

    公开(公告)号：US08656246B2

    公开(公告)日：2014-02-18

    申请号：US09835903

    申请日：2001-04-16

    申请人： Nagabhushana T. Sindhushayana ,  Jack K. Wolf

    发明人： Nagabhushana T. Sindhushayana ,  Jack K. Wolf

    IPC分类号： H03M13/00

    CPC分类号： H04L12/1877 ,  H04L1/0045 ,  H04L1/0065 ,  H04L1/0068 ,  H04L12/189 ,  H04L2001/0093 ,  H04W4/06 ,  H04W28/06

    摘要： A method and apparatus for multicasting of a multi-packet message are disclosed. Data to be transmitted as a message are divided into N sets, each set being encoded to generate encoded data. A set of parity bits is separated from each of the N sets of encoded data. The N sets of separated parity bits are encoded by a systematic code with a predetermined distance S across the N sets, resulting in N′ parity-bit packets. The N′ parity-bit packets are encoded with a code that is selected so that each receiving station decodes the N′ parity-bit packets with a high probability. The N-packet message, comprising the N sets of encoded data less the separated bits, and the N′ packets are multicasted. If less than S packets of the N-packet message fail to decode at a receiving station, the receiving station recovers all N packets using the N′ packets.

    摘要翻译： 公开了一种用于组播多分组消息的方法和装置。 作为消息传送的数据被划分为N组，每组被编码以产生编码数据。 一组奇偶校验位与N组编码数据中的每一个分离。 N组分离的奇偶校验位由跨越N组的预定距离S的系统代码编码，导致N个奇偶校验位分组。 N个奇偶校验位分组用选择的代码编码，使得每个接收站以高概率解码N个奇偶校验位分组。 包括N组编码数据少于分离比特的N分组消息和N'分组被多播。 如果N-packet消息中的S包少于在接收站解码，则接收站使用N'包恢复所有N个包。