公开(公告)号：EP1499014B1

公开(公告)日：2010-03-17

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

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\; ，\mathop{\mathrm{image}}$$

公开(公告)号：EP1505757B1

公开(公告)日：2008-07-09

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

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。