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    QUADRIPHASE SPREADING CODES IN CODE DIVISION MULTIPLE ACCESS COMMUNICATIONS
    1.
    发明申请
    QUADRIPHASE SPREADING CODES IN CODE DIVISION MULTIPLE ACCESS COMMUNICATIONS 审中-公开
    代码段中的四分之一扩展代码多路访问通信

    公开(公告)号：WO99066645A2

    公开(公告)日：1999-12-23

    申请号：PCT/SE1999/001040

    申请日：1999-06-11

    IPC: H04B1/707 ,  H04B7/26 ,  H04J13/00 ,  H04J13/10 ,  H04Q7/38 ,  H04B1/00

    CPC classification number: H04B1/707 ,  H04B7/2628 ,  H04J13/105 ,  H04J2013/0037

    Abstract: (57) Abstract Optimal code sequences are generated for use in spreading and de-spreading functions in a code division multiple access (CDMA) communications system. In particular, a family of quadriphase spreading codes is employed that provides a maximal number of spreading codes to achieve a high capacity in the CDMA communications system while at the same time having a minimal peak cross-correlation between any two spreading codes within that family to ensure cross-correlation interference is kept at or below acceptable levels. That optimal quadriphase spreading code family is the S(2) family of four phase code sequences of length L = 2 , where m is an integer greater than or equal to 5. The size of the S(2) family of quaternary spreading codes is (L + 2)(L + 1) , and the maximum cross-correlation is 1 + 4 2ROOT (L + 1). The spreading codes are preferably allocated to base stations using specific code subsets of the S(2) family having the same cross-correlation properties of the S(0) and/or S(1) family of codes. Spreading codes are advantageously extended by one or more code symbols as necessary or otherwise desirable. For example, to support variable transmission rate services, it is desirable to employ spreading codes whose length may be expressed as an integer multiple of each spreading factor in the mobile communications system. Since individual spreading codes have a length of 2 1, one code symbol is added to the generated spreading code.

    Abstract translation: （57）摘要生成用于码分多址（CDMA）通信系统中的扩展和解扩功能的最优码序列。 特别地，采用一系列四相扩展码，其提供最大数量的扩展码以在CDMA通信系统中实现高容量，同时在该系列内的任何两个扩展码之间具有最小的峰值互相关 确保互相关干扰保持在或低于可接受的水平。 该最佳四相扩展码族是长度为L = 2 的四相码序列的S（2）族，其中m是大于或等于5的整数.S（2）族的大小 四分之一扩展码为（L + 2）（L + 1）<2>，最大互相关为1 + 4 2ROOT（L + 1）。 扩展码优选地使用具有S（0）和/或S（1）码系的相同互相关性质的S（2）族的特定码子集来分配给基站。 扩展码有利地由一个或多个代码符号扩展，根据需要或其他方面的需要。 例如，为了支持可变传输速率业务，期望采用在移动通信系统中其长度可以表示为每个扩展因子的整数倍的扩展码。 由于各个扩展码的长度为2×1，所以在生成的扩展码中加上一个码元。

    SIGNAL TRANSMITTING METHOD, TRANSMITTER, RECEIVER, AND SPREAD-SPECTRUM CODE SYNCHRONIZING METHOD FOR MOBILE COMMUNICATION SYSTEM
    3.
    发明申请
    SIGNAL TRANSMITTING METHOD, TRANSMITTER, RECEIVER, AND SPREAD-SPECTRUM CODE SYNCHRONIZING METHOD FOR MOBILE COMMUNICATION SYSTEM 审中-公开
    信号传输方法，发射机，接收机和用于移动通信系统的传播频谱同步方法

    公开(公告)号：WO1997033400A1

    公开(公告)日：1997-09-12

    申请号：PCT/JP1997000657

    申请日：1997-03-04

    Applicant: NTT MOBILE COMMUNICATIONS NETWORK INC. ,  HIGUCHI, Kenichi ,  SAWAHASHI, Mamoru ,  ADACHI, Fumiyuki ,  OHNO, Koji ,  HIGASHI, Akihiro

    Inventor： NTT MOBILE COMMUNICATIONS NETWORK INC.

    IPC: H04J13/00

    CPC classification number: H04B1/70756 ,  H04B1/70755 ,  H04B1/708 ,  H04B1/7083 ,  H04B2201/70702 ,  H04J13/16 ,  H04J2013/0037

    Abstract: The spread-spectrum code synchronizing speed of a down control channel is improved. The spectra of a control channel information signal and each communication channel information signal are spread by using different first spread-spectrum codes having the repetitive periods of information symbol periods from each first spread-spectrum code (short code) generating section (11). Then only the spectrum of the control channel information signal is spread by using third spread-spectrum codes which are complex conjugation of a common long code (second spread-spectrum code) to be spread from a third spread-spectrum code (complex conjugate code of a long code mask section) generating section (12). Thereafter, the signals of all channels are added at an adequate timing by an adder (13), the spectrum of the output of the adder (B) is spread by using second spread-spectrum codes from a second spread-spectrum code generating section (14), and the spread-spectrum signal is outputted as a spread modulated signal.

    Abstract translation: 改善了下行控制信道的扩频码同步速度。 通过使用具有来自每个第一扩频码（短码）产生部分（11））的具有信息符号周期的重复周期的不同的第一扩频码，扩展控制信道信息信号和每个通信信道信息信号的频谱。 那么只有控制信道信息信号的频谱通过使用第三扩频码来扩展，第三扩频码是从第三扩频码（第二扩频码）的复共轭 长码掩码部分）生成部分（12）。 此后，通过加法器（13）在适当的定时添加所有信道的信号，加法器（B）的输出的频谱通过使用来自第二扩频码生成部分的第二扩频码 14），扩频信号作为扩展调制信号输出。

    OVERSAMPLED CHANNEL RESPONSE IDENTIFICATION
    5.
    发明申请
    OVERSAMPLED CHANNEL RESPONSE IDENTIFICATION 审中-公开
    超声波通道响应识别

    公开(公告)号：WO2008059406A1

    公开(公告)日：2008-05-22

    申请号：PCT/IB2007/054535

    申请日：2007-11-08

    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  CHERUBINI, Giovanni ,  ELEFTHERIOU, Evangelos, S. ,  HUTCHINS, Robert, Allen ,  JAQUETTE, Glen, Alan ,  OELCER, Sedat

    Inventor： CHERUBINI, Giovanni ,  ELEFTHERIOU, Evangelos, S. ,  HUTCHINS, Robert, Allen ,  JAQUETTE, Glen, Alan ,  OELCER, Sedat

    IPC: G11B20/10 ,  H04L25/03

    CPC classification number: G11B20/10009 ,  G11B20/10046 ,  G11B20/10212 ,  H04B1/7085 ,  H04J2013/0037 ,  H04L25/0212 ,  H04L25/03038

    Abstract: Methods, apparatus and computer programs are provided for multiplication-free identification of the impulse response of an oversampled data channel (3). An input ( a ) comprising a pseudo-random binary sequence of L symbols is supplied to the channel (3) at a symbol rate of 1/T. A channel output ( z ) is produced by sampling a channel output signal corresponding to the input (a) with a sampling interval T s = (q/p)T, where q and p are relative prime integers with q P(j)) are produced from the channel output ( z ) by selecting, for each polyphase sequence ( P(j)) , every p th sample of the channel output ( z ), with a phase shift of one sample between successive polyphase sequences ( p(j) ). A decimated binary sequence ( b ) is produced by selecting every q th symbol of the channel input ( a ). Each polyphase sequence ( p(j) ) is correlated with the decimated binary sequence ( b ), the two possible binary values being of equal magnitude and opposite sign for the correlation. The correlation results are accumulated to produce a correlated output sequence ( c(j) ) for that polyphase sequence (p(j) ). The samples of the correlated output sequences ( c(j) ) are then interleaved in phase order of the corresponding polyphase sequences ( p(j) ) to produce the impulse response of the channel.

    Abstract translation: 提供了方法，装置和计算机程序，用于对过采样数据信道（3）的脉冲响应进行无乘法识别。 包含L个符号的伪随机二进制序列的输入（a）以符号率1 / T提供给信道（3）。 通过以采样间隔T（t / p）T对与输入（a）相对应的通道输出信号进行采样来产生通道输出（z），其中q和p是相对第一整数 对于q 个符号来产生抽取的二进制序列（b）。 每个多相序列（p（j））与抽取的二进制序列（b）相关，两个可能的二进制值相等，相关的符号相反。 累积相关结果以产生该多相序列（p（j））的相关输出序列（c（j））。 然后，相关输出序列（c（j））的样本以对应的多相序列（p（j））的相位顺序进行交织，以产生信道的脉冲响应。

    INTERMITTENT CALIBRATOR
    6.
    发明申请
    INTERMITTENT CALIBRATOR 审中-公开

    公开(公告)号：WO01054308A1

    公开(公告)日：2001-07-26

    申请号：PCT/JP2001/000119

    申请日：2001-01-12

    IPC: H01Q3/26 ,  H04B7/08 ,  H04B7/26 ,  H04B17/00 ,  H04J13/00 ,  H04W16/28 ,  H04W24/00 ,  H04W88/08 ,  H04J13/04

    CPC classification number: H04B1/707 ,  H04B17/21 ,  H04B2201/70701 ,  H04J2013/0037

    Abstract: A base station (101) receives a communication signal subjected to spectrum spreading with a spreading code unique to the signal and transmitted from a mobile station unit (110), and CAL signals each subjected to spectrum spreading with a spreading code unique to the CAL signal, transmitted from a CAL radio signal generator (120) for a predetermined time for each unit frame, and multiplexed in the same frequency band. A/D convering/despreading sections (106, 107) extract the communication signal and the CAL signal from the received signal. A calibrating section (108) performs calibration using the CAL signals parallel with communication using the communication signal. An array synthesizing/signal processing section (109) demodulates the communication signal using the calibration results.

    Abstract translation: 基站（101）利用信号特有的扩频码从移动站单元（110）接收经过频谱扩展的通信信号，并且对每个经过频谱扩展的CAL信号以对CAL信号特有的扩展码进行接收 从每个单位帧从CAL无线电信号发生器（120）发送预定时间，并在相同的频带中多路复用。 A / D收敛/解扩部分（106,107）从接收到的信号中提取通信信号和CAL信号。 校准部（108）使用与使用通信信号的通信并行的CAL信号进行校准。 阵列合成/信号处理部（109）使用校准结果对通信信号进行解调。

    CONCATENATED CODES FOR SPREAD SPECTRUM COMMUNICATION
    7.
    发明申请
    CONCATENATED CODES FOR SPREAD SPECTRUM COMMUNICATION 审中-公开
    用于传播频谱通信的编码

    公开(公告)号：WO99033212A1

    公开(公告)日：1999-07-01

    申请号：PCT/IE1998/000110

    申请日：1998-12-18

    IPC: H04B1/707 ,  H04J13/00 ,  H04J13/10 ,  H04J14/00

    CPC classification number: H04B1/707 ,  H04J13/004 ,  H04J13/107 ,  H04J14/005 ,  H04J2013/0037

    Abstract: Spread spectrum communication techniques and applications using signature sequences are described to reduce the effects of certain transmission impairments such as co-channel interference, multiple access interference and intersymbol interference. Signature sequences with structured properties are obtained by generating cosets from a seed set of sequences, constructing a subset of sequences by concatenating the sequences of a coset and constructing a full set of sequences by concatenating the subsets of sequences.

    Abstract translation: 描述使用签名序列的扩频通信技术和应用，以减少某些传输损伤的影响，例如同信道干扰，多址干扰和符号间干扰。 具有结构特征的签名序列通过从种子序列集合生成陪集来获得，通过连接陪集的序列并通过连接序列子集来构建整组序列来构建序列的子集。

    APPARATUS AND METHOD FOR GENERATING MULTIPLE SCRAMBLING CODES IN ASYNCHRONOUS MOBILE COMMUNICATION SYSTEM
    9.
    发明申请
    APPARATUS AND METHOD FOR GENERATING MULTIPLE SCRAMBLING CODES IN ASYNCHRONOUS MOBILE COMMUNICATION SYSTEM 审中-公开
    用于在异步移动通信系统中生成多个屏蔽码的装置和方法

    公开(公告)号：WO01022636A1

    公开(公告)日：2001-03-29

    申请号：PCT/KR2000/001062

    申请日：2000-09-22

    IPC: H03K3/84 ,  H04B1/707 ,  H04B7/26 ,  H04J11/00 ,  H04J13/10 ,  H04L7/00 ,  H04W4/00 ,  H04W16/14 ,  H04B1/69

    CPC classification number: H04J13/12 ,  H04B1/707 ,  H04B2201/70703 ,  H04J13/0044 ,  H04J2013/0037

    Abstract: An apparatus and method for generating multiple scrambling codes in an asynchronous mobile communication system. In a scrambling code generating apparatus for generating a current scrambling code and a compressed mode scrambling code for compressed mode transmission in a base station device having a spreader for spreading an input data sequence with one of a plurality of OVSF codes and a scrambler for scrambling the spread data sequence with a primary scrambling code used as a default or one of a plurality of secondary scrambling codes according to the number of mobile stations in communication, a first feedback linear shift register generates an m-sequence from first predetermined initial bits, a second feedback linear shift register generates another m-sequence from second predetermined initial bits, a first adder generates the current scrambling code by adding the outputs of the first and second linear feedback shift registers, a second adder adds the output of the second linear feedback register and an m-sequence one bit delayed from the output of the first linear feedback register, and a third adder adds the output of the second linear feedback register and an m-sequence two bits delayed from the output of the first linear feedback register. Here, the compressed mode scrambling code is one of the outputs of the second and third adders and provided to the scrambler to scramble the spread data sequence.

    Abstract translation: 一种用于在异步移动通信系统中产生多个扰码的装置和方法。 在用于产生用于压缩模式传输的当前扰码的扰码产生装置和具有用于使用多个OVSF码中的一个扩展输入数据序列的扩展器的基站装置和用于扰频 第一反馈线性移位寄存器根据第一预定初始位产生m序列，第二预定初始位产生m序列，第二反向线性移位寄存器根据在通信中的移动站的数量， 反馈线性移位寄存器从第二预定初始位产生另一个m序列，第一加法器通过将第一和第二线性反馈移位寄存器的输出相加来产生当前扰码，第二加法器将第二线性反馈寄存器的输出和 从第一线性反馈寄存器的输出延迟一位的m序列，以及thi 第r个加法器将第二个线性反馈寄存器的输出和从第一个线性反馈寄存器的输出延迟的m序列两位相加。 这里，压缩模式扰频码是第二和第三加法器的输出之一，并且提供给加扰器以加扰扩展数据序列。

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