公开(公告)号：DE602006020153D1

公开(公告)日：2011-03-31

申请号：DE602006020153

申请日：2006-12-12

Applicant: ST MICROELECTRONICS SRL

Inventor： AVELLONE GIUSEPPE ,  FRAZZETTO MARISTELLA ,  MESSINA ETTORE

IPC: G01S19/30 ,  H04B1/707

公开(公告)号：DE60331728D1

公开(公告)日：2010-04-29

申请号：DE60331728

申请日：2003-07-15

Applicant: ST MICROELECTRONICS SA ,  ST MICROELECTRONICS SRL

Inventor： MESSINA ETTORE ,  PIAZZESE NICOLO IVAN ,  LIPPOLIS GIUSEPPE ,  SALURSO ELENA ,  SERRATORE ALBERTO ,  GALLUZZO AGOSTINO

IPC: H03G3/00 ,  H03G3/20 ,  H03M1/18

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 (Sin) with an error signal (Perr, Pf); performing an analog-to-digital conversion (14) on the result of said mixing operation, in order to obtain a controlled output signal (x(t), Sout); measuring (25) the power (Pmeas) of said controlled output signal (x(t), Sout); subtracting the measured power (Pmeas) from a reference power (Pref) in order to obtain said error signal (Perr, Pf). According to the proposed method the operation of measuring the power of the controlled output signal (x(t), Sout) comprises: setting at least a power threshold (Th;Th1, Th2, Th3); measuring (27) a rate of crossings of said power threshold (Th; Th1, Th2, Th3) by said controlled output signal (x(t), Sout) in a given observation window; deriving (29) from said number of crossings the measured power value (Pmeas, sigma 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.

公开(公告)号：DE60211846D1

公开(公告)日：2006-07-06

申请号：DE60211846

申请日：2002-03-07

Applicant: ST MICROELECTRONICS SRL

Inventor： LO IACONO DANIELE ,  MESSINA ETTORE ,  AVELLONE GIUSEPPE ,  GALLUZZO AGOSTINO

IPC: H04J13/00 ,  H04J13/10

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.

公开(公告)号：ITTO20000871A1

公开(公告)日：2002-03-15

申请号：ITTO20000871

申请日：2000-09-15

Applicant: ST MICROELECTRONICS SRL

Inventor： LATTUCA ALESSANDRO ,  AVELLONE GIUSEPPE ,  MESSINA ETTORE ,  GALLUZZO AGOSTINO

IPC: C06F20060101 ,  H04B7/216 ,  H04J13/00 ,  H04J13/12 ,  H04K1/00 ,  H04L9/00

Abstract: The device can be used for generating, in the framework of a CDMA communications terminal, both Walsh-Hadamard channeling codes and OVSF channeling codes. The device comprises a code generator preferably configured for generating Walsh-Hadamard codes. When the device is used for generating Walsh-Hadamard codes, the corresponding index values, applied to an input of the device, are sent to the input of the code generator. Generation of OVSF codes envisages, instead, that the corresponding indices, sent to an input of the device, undergo mapping, which enables generation, starting from the OVSF code, of the corresponding index identifying a string of symbols that is identical within the Walsh-Hadamard code. In this way each string of OVSF code symbols is generated, so producing, by means of the code generator, the generation of the identical string of symbols included in the Walsh-Hadamard code.

公开(公告)号：IT1320651B1

公开(公告)日：2003-12-10

申请号：ITTO20000871

申请日：2000-09-15

Applicant: ST MICROELECTRONICS SRL

Inventor： LATTUCA ALESSANDRO ,  AVELLONE GIUSEPPE ,  MESSINA ETTORE ,  GALLUZZO AGOSTINO

IPC: C06F20060101 ,  H04B7/216 ,  H04J13/00 ,  H04J13/12 ,  H04K1/00 ,  H04L9/00

Abstract: The device can be used for generating, in the framework of a CDMA communications terminal, both Walsh-Hadamard channeling codes and OVSF channeling codes. The device comprises a code generator preferably configured for generating Walsh-Hadamard codes. When the device is used for generating Walsh-Hadamard codes, the corresponding index values, applied to an input of the device, are sent to the input of the code generator. Generation of OVSF codes envisages, instead, that the corresponding indices, sent to an input of the device, undergo mapping, which enables generation, starting from the OVSF code, of the corresponding index identifying a string of symbols that is identical within the Walsh-Hadamard code. In this way each string of OVSF code symbols is generated, so producing, by means of the code generator, the generation of the identical string of symbols included in the Walsh-Hadamard code.

公开(公告)号：ITTO20000871D0

公开(公告)日：2000-09-15

申请号：ITTO20000871

申请日：2000-09-15

Applicant: ST MICROELECTRONICS SRL

Inventor： LATTUCA ALESSANDRO ,  AVELLONE GIUSEPPE ,  MESSINA ETTORE ,  GALLUZZO AGOSTINO

IPC: C06F20060101 ,  H04B7/216 ,  H04J13/00 ,  H04J13/12 ,  H04K1/00 ,  H04L9/00

Abstract: The device can be used for generating, in the framework of a CDMA communications terminal, both Walsh-Hadamard channeling codes and OVSF channeling codes. The device comprises a code generator preferably configured for generating Walsh-Hadamard codes. When the device is used for generating Walsh-Hadamard codes, the corresponding index values, applied to an input of the device, are sent to the input of the code generator. Generation of OVSF codes envisages, instead, that the corresponding indices, sent to an input of the device, undergo mapping, which enables generation, starting from the OVSF code, of the corresponding index identifying a string of symbols that is identical within the Walsh-Hadamard code. In this way each string of OVSF code symbols is generated, so producing, by means of the code generator, the generation of the identical string of symbols included in the Walsh-Hadamard code.