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：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