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    Process and device for synchronization and codegroup identification in CDMA cellular communication systens
    3.
    发明公开
    Process and device for synchronization and codegroup identification in CDMA cellular communication systens 有权
    用于CDMA蜂窝通信系统的同步和Kodengruppe的识别的方法和装置

    公开(公告)号：EP1422832A1

    公开(公告)日：2004-05-26

    申请号：EP02425619.0

    申请日：2002-10-11

    Applicant: STMicroelectronics S.r.l.

    Inventor： Pappalardo, Francesco ,  Avellone, Giuseppe ,  Salurso, Elena ,  Galluzzo, Agostino

    IPC: H04B1/707

    CPC classification number: H04B1/70735 ,  H04B1/708 ,  H04B1/7083 ,  H04B2201/70702 ,  H04B2201/70707

    Abstract: To obtain frame synchronization and identify the cell codegroup in a cellular communication system (such as a system based upon the standard 3GPP FDD), there are available the synchronization codes (SSCH) organized in chips or letters transmitted at the beginning of respective slots. Slot synchronization is obtained previously in a first step of the operation of cell search. During a second step, there are acquired, by means of correlation (10) or fast Hadamard transform, the energy values corresponding to the respective individual letters with reference to the possible starting positions of the corresponding frame within the respective slot. Operating in a serial way (24) at the end of acquisition of the aforesaid energy values of the individual letters, or else operating in parallel, the energies of the corresponding words are determined. Of these eneriges only the maximum word-energy value and the information for the corresponding starting position are stored in a memory structure (22). Said maximum value and said starting position identify, respectively, the cell codes and the frame synchronization sought. A preferential application is in mobile communication systems based upon standards such as UMTS, CDMA2000, IS95, or WBCDMA.

    Abstract translation: 以获得帧同步并识别在蜂窝通信系统中的小区的代码组（搜索作为基于标准的3GPP FDD系统），存在可在芯片或字母反式组织的同步码（SSCH）在respectivement槽的开端mitted。 时隙同步在小区搜索的手术的第一步先前获得的。 在第二步骤期间，存在被获取，通过相关性（10）的装置或几乎阿达玛变换，该能量值对应于与参考respectivement时隙内的对应的帧的可能的开始位置的respectivement单个字母。 在采集单个字母的上述能量值的所述端以串行方式（24）操作时，或者在并行操作中，对应的字的能量是确定性的开采。 论文eneriges的唯一的最大字能量值和相应的起始位置的信息被存储在存储器结构（22）。 所述最大值和所述起始位置确定，分别为小区的代码以及所寻求的帧同步。 以优惠的应用是在基于标准的移动通信系统：诸如UMTS，CDMA2000，IS95，WBCDMA码或。

    A process for generating codes for CDMA communications, system and computer program
    4.
    发明公开
    A process for generating codes for CDMA communications, system and computer program 有权
    Verfahren，系统与计算机程序zur Erzeugung von CodesfürCDMA-Nachrichtenübertragung

    公开(公告)号：EP1343265A1

    公开(公告)日：2003-09-10

    申请号：EP02425130.8

    申请日：2002-03-07

    Applicant: STMicroelectronics S.r.l.

    Inventor： Loiacono, Daniele ,  Messina, Ettore ,  Avellone, Giuseppe ,  Galluzzo, Agostino

    IPC: H04J13/02

    CPC classification number: H04J13/105 ,  H04J13/0025

    Abstract: In order to generate the main scrambling code of order N and the secondary scrambling code of order K within the set identified by the primary scrambling code of order N, a first m-sequence and a second m-sequence are generated using Fibonacci linear feedback shift registers (LFSRs). Then said first m-sequence and said second m-sequence are modulo-2 added so as to form the I branch of said primary scrambling code. A first T-bit masking word and a second T-bit masking word of rank 0 (X0-MASK, Y0-MASK) are generated that correspond to the polynomial time shifts (X0 (D), Y0 (D)), and the intermediate taps of the X and y registers respectively chosen by means of said masking words (X0-MASK, Y0-MASK) are modulo-2 added so as to generate a third sequence and a fourth sequence which are modulo-2 added together to form the Q branch of said primary scrambling code. With the choice, starting from the least significant Kmax bits of the register X, of the K-th intermediate tap corresponding to the secondary scrambling code of order K within said set identified by the primary scrambling code of order N, a fifth sequence is generated, which, modulo-2 added to said second sequence, forms the I branch of said secondary scrambling code. By modulo-2 summing the intermediate taps of the register X masked by means of the aforesaid first masking word of rank N (XN-MASK), a sixth sequence is generated, which, modulo-2 added to the aforesaid fourth sequence, forms the Q branch of the secondary scrambling code.

    Abstract translation: 为了产生N阶的主扰码和由次序N的主扰码识别的集合内的次序K的次扰码，使用斐波纳契线性反馈移位生成第一m序列和第二m序列 寄存器（LFSR）。 然后，所述第一m序列和所述第二m序列被加模，以便形成所述主扰码的I分支。 生成对应于多项式时移（X0（D），Y0（D））的第0个（X0-MASK，Y0-MASK）的第一T位屏蔽字和第二T位屏蔽字， 分别通过所述掩蔽字（X0-MASK，Y0-MASK）选择的X和Y寄存器的中间抽头被加模，以便产生模2加在一起形成的第三序列和第四序列 所述主扰码的Q分支。 通过选择，从寄存器X的最低有效Kmax位开始，对应于由次序N的主扰码识别的所述集合内的次序K的次级扰频码的第K个中间抽头，产生第五个序列 ，其中添加到所述第二序列的模2形成所述辅助扰码的I分支。 通过模2对由N（XN-MASK）的上述第一掩蔽字掩蔽的寄存器X的中间抽头进行求和，产生第六序列，其中加上前述第四序列的模2形成 Q分支的二次扰码。

    Signal transmission method using antenna diversity and corresponding apparatus
    9.
    发明公开
    Signal transmission method using antenna diversity and corresponding apparatus 有权
    信号传输系统

    公开(公告)号：EP1505757A1

    公开(公告)日：2005-02-09

    申请号：EP03425535.6

    申请日：2003-08-05

    Applicant: STMicroelectronics S.r.l.

    Inventor： Serratore, Alberto ,  Avellone, Giuseppe ,  Rimi, Francesco ,  Piazzese, Nicolo Ivan ,  Galluzzo, Agostino

    IPC: H04L1/06

    CPC classification number: H04L1/0071 ,  H04L1/0618

    Abstract: Encoded digital symbols (S 1 S 2 S 3 S 4 ) are transmitted via a first pair of antennas (Tx1, Tx2) and at least one second pair of antennas (Tx3, Tx4). The sets of symbols used for the transmission via the second pair of antennas (Tx3, Tx4) are re-ordered temporally (S 3 S 4 S 1 S 2 ) into subsets of symbols with respect to the symbols used for the first pair of antennas (Tx1, Tx2). For the first pair of antennas (Tx1, Tx2) there is used a signal subjected to encoding with a code-division-multiple-access code (CDMA) and subjected to spreading with a spreading code (c 1 ), and, likewise, for the second pair or pairs of antennas (Tx3, Tx4) there are used signals subjected to encoding with respective code-division-multiple-access code (CDMA) and subjected to spreading with a respective spreading code (c 2 ). At least one between the respective code-division-multiple-access code (CDMA) and the respective spreading code (c 2 ) used for the transmission via the second pair of antennas (Tx3, Tx4) is different from the code-division-multiple-access code (CDMA) and from the spreading code (c 1 ) used for the transmission via the first pair of antennas (Tx1, Tx2). The solution can be extended to the use of a plurality of second pairs of antennas in transmission and/or to the use of a plurality of antennas in reception.

    Abstract translation: 编码的数字符号（S1 S2 S3 S4）经由第一对天线（Tx1，Tx2）和至少一个第二对天线（Tx3，Tx4）发送。 用于经由第二对天线（Tx3，Tx4）的传输的符号组在时间上被重新排序（S3 S4 S1 S2）成相对于用于第一对天线（Tx1，Tx2）的符号的符号子集 ）。 对于第一对天线（Tx1，Tx2），使用经码分多址（CDMA）进行编码并经扩频（c1）进行扩频的信号，同样地，对于 第二对或第二对天线（Tx3，Tx4）使用经过编码的各个码分多址（CDMA）信号，并用相应的扩展码（c2）进行扩频。 用于经由第二对天线（Tx3，Tx4）发送的各个码分多址（CDMA）和各扩频码（c2）中的至少一个不同于码分多址 接入码（CDMA）和用于经由第一对天线（Tx1，Tx2）发送的扩展码（c1）。 解决方案可以扩展到在传输中使用多个第二对天线和/或在接收中使用多个天线。

    A method for automatic gain control, for instance in a telecommunication system, device and computer program therefor
    10.
    发明公开
    A method for automatic gain control, for instance in a telecommunication system, device and computer program therefor 有权
    一种用于自动增益控制的方法，例如，在电信系统中，装置和计算机程序为此

    公开(公告)号：EP1499014A1

    公开(公告)日：2005-01-19

    申请号：EP03354064.2

    申请日：2003-07-15

    Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics S.A.

    Inventor： Messina, Ettore ,  Piazzese, Nicolo Ivan ,  Lippolis, Giuseppe ,  Salurso, Elena ,  Serratore, Alberto ,  Galluzzo, Agostino

    IPC: H03G3/00

    CPC classification number: H03G3/3052 ,  H03G3/3036 ,  H03M1/185

    Abstract: A method for automatic gain control, e.g. in a receiver for a mobile telecommunication system comprises the operations of:

    mixing (13) a received signal (S in ) with an error signal ( P err , P f );
    performing an analog-to-digital conversion (14) on the result of said mixing operation, in order to obtain a controlled output signal ( x(t) , S out );
    measuring (25) the power ( P meas ) of said controlled output signal (x(t), S out );
    subtracting the measured power (P meas ) from a reference power ( P ref ) in order to obtain said error signal ( P err , P f ).

    According to the proposed method the operation of measuring the power of the controlled output signal ( x(t) , S out ) comprises:

    setting at least a power threshold ( T h ;T h1 , T h2 , T h3 );
    measuring (27) a rate of crossings of said power threshold ( T h ; T h1 , T h2 , T h3 ) by said controlled output signal ( x(t) , S out ) in a given observation window;
    deriving (29) from said number of crossings the measured power value ( P meas , σ 2=1 ).

    The proposed method is particularly suitable for application in receivers of mobile telecommunication systems based on CDMA (Code Division Multiple Access), but also for mobile telecommunication system according to GSM, UMTS, CDMA2000, IS95 o WBCDMA standards and satellite telecommunication systems.

    Abstract translation: 一种用于自动增益控制，E.G.方法 在混合（13）的接收信号（SIN）在误差信号（PERR，PF）;：在一种用于移动电信系统中的接收器包括的操作 在执行模拟 - 数字上混合所述外科手术，以获得一个控制输出信号的结果转换（14）（X（t），S OUT）; 测量（25）的功率的所述受控的输出信号（Pmeas）（X（t），S OUT）; 为了减去参考功率（县）所测得的功率（Pmeas）以获得所述误差信号（PERR，PF）。 。根据测量运算受控输出信号的功率（X（t）的，SOUT）包括所提出的方法：设置至少一个功率阈值（Th时，Th1细胞，TH2，TH3）; 测量（27）一（Th时，Th1细胞，TH2，TH3）所述功率阈值的交叉点由所述受控的输出信号速率（X（t），S out）的一个给定的观察窗; 来自所述号码的交叉测量功率值的（Pmeas，西格玛2 = 1）导出（29）。 所提出的方法特别适合于在基于CDMA（码分多址）移动电信系统的接收器应用，该但是对于移动电信系统雅丁到GSM，UMTS，CDMA2000，IS-95öWBCDMA码标准和卫星通信系统 ，

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