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    Improved random access preamble coding for initiation of wireless mobile communications sessions
    1.
    发明授权
    Improved random access preamble coding for initiation of wireless mobile communications sessions 有权

    公开(公告)号：EP1505739B1

    公开(公告)日：2018-09-19

    申请号：EP04026290.9

    申请日：2000-06-09

    申请人： Texas Instruments Incorporated

    发明人： Dabak, Anand G.

    IPC分类号： H04J13/00 ,  H04J13/10

    CPC分类号： H04J13/102 ,  H04B2201/70701 ,  H04J13/0048 ,  H04J2013/0037

    摘要： A wireless communications network, including a base station (10) and wireless units (UE), is disclosed. The wireless units (UE) request a connection with the base station (10) by the transmission of a preamble within time slots designated by the base station (10). The disclosed preambles are Walsh Hadamard code symbols, repeated a number of times so as to have the same length as a cell-specific scrambling code. The wireless unit (UE) requesting a connection pseudo-randomly selects a time slot from those available, and one of the Walsh Hadamard code symbols, replicates the code symbol into a spread interleaved bitstream, scrambles this bitstream and transmits it to the base station (10). Upon receipt, the base station (10) applies the incoming bitstream to a matched filter (98) to descramble the signal, following which the symbol is de-interleaved by way of a sequence of delay lines (100). Despreaders (102) generate each bit of the symbol from corresponding taps of the delay lines (100), and the symbol is applied to a correlator (104, 126, 136) to determine the transmitted preamble.

    WIRELESS TRANSMITTER AND RECEIVER
    2.
    发明授权
    WIRELESS TRANSMITTER AND RECEIVER 有权
    无线发射机和接收机

    公开(公告)号：EP1172944B1

    公开(公告)日：2018-02-21

    申请号：EP01000269.9

    申请日：2001-07-04

    申请人： Texas Instruments Incorporated

    发明人： Dabak, Anand G. ,  Onggosanusi, Eko N. ,  Schmidl, Timothy M. ,  Gatherer, Alan

    IPC分类号： H04B7/08 ,  H04B1/707 ,  H04B7/06 ,  H04L1/06

    CPC分类号： H04L1/0631 ,  H04B1/7115 ,  H04B7/0613 ,  H04J13/00 ,  H04J13/0048 ,  H04L1/0065 ,  H04L1/0071 ,  H04L1/0618

    摘要： A wireless communication network (10) comprising a wireless transmitter (12). The transmitter comprises a plurality of antennas (AT1 1 , AT1 2 ), wherein each of the plurality of antennas is operable for transmitting signals. The transmitter also comprises, for each of a plurality of different user channels ( D n ), circuitry (22 n ) for providing a plurality of groups of symbols in a first symbol group sequence ( D �¢ n 1 ). The transmitter also comprises, for each of the plurality of different user channels, circuitry ( 24 �¢ n 1 ) for forming a first modulated symbol group sequence for the user channel by modulating the symbols in the first symbol group sequence for the user channel with a unique code that corresponds to the user channel and distinguishes the user channel from each other of the plurality of different user channels and circuitry (26 1 ) for combining the first modulated symbol group sequences and providing them for transmission by a first antenna (AT1 1 ). The transmitter also comprises, for each of the plurality of different user channels, circuitry (22 n ) for forming a second symbol group sequence ( D �¢ n 2 ) by re-ordering the groups of symbols in the first symbol group sequence and further by time reversing symbols in at least some of the groups of symbols. Also for each of the plurality of different user channels, the transmitter comprises circuitry ( 24 �¢ n 2 ) for forming a second modulated symbol group sequence for the user channel by modulating the symbols in the second symbol group sequence for the user channel with a unique code that corresponds to the user and distinguishes the user from each other of the plurality of different user channels. Finally, the transmitter comprises circuitry (26 2 ) for combining the second modulated symbol group sequences and providing them for transmission by the second antenna (AT1 2 ).

    Improved random access preamble coding for initiation of wireless mobile communications sessions
    6.
    发明公开
    Improved random access preamble coding for initiation of wireless mobile communications sessions 有权
    改进Zufallszugriffspräambelkodierung启动无线移动通信会话

    公开(公告)号：EP1505739A2

    公开(公告)日：2005-02-09

    申请号：EP04026290.9

    申请日：2000-06-09

    申请人： Texas Instruments Incorporated

    发明人： Dabak, Anand G.

    IPC分类号： H04B1/707

    CPC分类号： H04J13/102 ,  H04B2201/70701 ,  H04J13/0048 ,  H04J2013/0037

    摘要： A wireless communications network, including a base station (10) and wireless units (UE), is disclosed. The wireless units (UE) request a connection with the base station (10) by the transmission of a preamble within time slots designated by the base station (10). The disclosed preambles are Walsh Hadamard code symbols, repeated a number of times so as to have the same length as a cell-specific scrambling code. The wireless unit (UE) requesting a connection pseudo-randomly selects a time slot from those available, and one of the Walsh Hadamard code symbols, replicates the code symbol into a spread interleaved bitstream, scrambles this bitstream and transmits it to the base station (10). Upon receipt, the base station (10) applies the incoming bitstream to a matched filter (98) to descramble the signal, following which the symbol is de-interleaved by way of a sequence of delay lines (100). Despreaders (102) generate each bit of the symbol from corresponding taps of the delay lines (100), and the symbol is applied to a correlator (104, 126, 136) to determine the transmitted preamble.

    摘要翻译： 一种无线通信网络，包括基站（10）和无线单元（UE）是游离缺失盘。 无线单元（UE）请求与所述基站（10）通过所述基站（10）指定的时隙内的前同步码的传输的连接。 盘的前同步码游离缺失是沃尔什Hadamard码符号，重复许多次，以便具有相同的长度作为特定于小区的加扰码。 无线单元（UE）请求连接伪随机地选择从那些可用的时隙，和沃尔什Hadamard码符号中的一个，复制码符号成蔓延交错比特流，加扰这个比特流，并将其发送到基站（ 10）。 在接收后，基站（10）适用于所述输入比特流，以匹配滤波器（98），以解扰该信号，随后通过延迟线（100）的序列的方式将符号解交织。 解扩器（102）生成所述符号的每个比特从对应的延迟线（100）的抽头，和符号被施加到相关器（104，126，136），以确定的矿反式mitted前导码。

    Multiuser detection for wireless communications systems in the presence of Interference
    7.
    发明公开
    Multiuser detection for wireless communications systems in the presence of Interference 有权
    Gegenwart von Inteferenz的MehrbenutzerdetektionfürdrahtloseÜbertragungssysteme

    公开(公告)号：EP1492288A2

    公开(公告)日：2004-12-29

    申请号：EP04102920.8

    申请日：2004-06-23

    申请人： TEXAS INSTRUMENTS INCORPORATED

    发明人： Onggosanusi, Eko N. ,  Schmidl, Timothy M. ,  Dabak, Anand G.

    IPC分类号： H04L25/02 ,  H04B1/10

    CPC分类号： H04L25/0204 ,  H04L25/0228 ,  H04L25/0244

    摘要： System and method for detecting transmissions from multiple users in a digital wireless communications system in the presence of interference. A preferred embodiment comprises derotating a received signal (510) by a specified amount, determining channel estimates (515), which can include the determination of the number of users (interferers plus a desired user), and extracting information (520) transmitted by the desired user from the received signal. Successive and parallel multiuser detection schemes are provided for extracting the information from the received signal.

    摘要翻译： 该方法涉及将接收到的信号消除特定量，确定信道估计并检测干扰源的存在。 通过使用多用户检测单元从接收到的信号中提取由期望用户发送的信息。 接收到的信号以给定的采样率进行采样并以符号速率发送。 采样率高于符号率。 还包括用于包括耦合到信号输入的采样单元的接收机的独立权利要求。

    Improved random access preamble coding for initiation of wireless mobile communications sessions
    10.
    发明公开
    Improved random access preamble coding for initiation of wireless mobile communications sessions 有权
    建设无线移动通信链路直接Zuggrifspräambel的改进的编码

    公开(公告)号：EP1059818A3

    公开(公告)日：2002-02-13

    申请号：EP00304918.6

    申请日：2000-06-09

    申请人： Texas Instruments Incorporated

    发明人： Dabak, Anand G.

    IPC分类号： H04Q7/32 ,  H04B1/707 ,  H04Q7/38 ,  H04B7/26

    CPC分类号： H04J13/0048 ,  H04B1/707 ,  H04B1/709 ,  H04L7/041 ,  H04W76/10

    摘要： A wireless communications network, including a base station (10) and wireless units (UE), is disclosed. The wireless units (UE) request a connection with the base station (10) by the transmission of a preamble within time slots designated by the base station (10). The disclosed preambles are Walsh Hadamard code symbols, repeated a number of times so as to have the same length as a cell-specific scrambling code. The wireless unit (UE) requesting a connection pseudo-randomly selects a time slot from those available, and one of the Walsh Hadamard code symbols, replicates the code symbol into a spread interleaved bitstream, scrambles this bitstream and transmits it to the base station (10). Upon receipt, the base station (10) applies the incoming bitstream to a matched filter (98) to descramble the signal, following which the symbol is de-interleaved by way of a sequence of delay lines (100). Despreaders (102) generate each bit of the symbol from corresponding taps of the delay lines (100), and the symbol is applied to a correlator (104, 126, 136) to determine the transmitted preamble.