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：DE60322049D1

公开(公告)日：2008-08-21

申请号：DE60322049

申请日：2003-08-05

Applicant: ST MICROELECTRONICS SRL

Inventor： SERRATORE ALBERTO ,  AVELLONE GIUSEPPE ,  RIMI FRANCESCO ,  PIAZZESE NICOLO IVAN ,  GALLUZZO AGOSTINO

IPC: H04L1/06 ,  H04L1/00

Abstract: Encoded digital symbols (S1 S2 S3 S4 ) 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 (S3 S4 S1 S2 ) 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 (c1), 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 (c2). At least one between the respective code-division-multiple-access code (CDMA) and the respective spreading code (c2) 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 (c1) 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.

公开(公告)号：DE60306894T2

公开(公告)日：2007-02-15

申请号：DE60306894

申请日：2003-05-07

Applicant: ST MICROELECTRONICS SRL

Inventor： RIMI FRANCESCO ,  PAPPALARDO FRANCESCO ,  AVELLONE GIUSEPPE ,  GALLUZZO AGOSTINO

IPC: H04B1/707

Abstract: In order to execute the cell-search procedure in a cellular communication system (such as a system based upon the 3GPP TDD standard), there are available identification codes for the second step (slot synchronization) and for the third step (identification of the scrambling codes). Said identification codes are identified by means of a process of correlation with the received signal and are used for obtaining from a correspondence table the parameters for the execution of the second step (CD) or of the third step (SCR). The correspondence table is stored in a reduced form by means of the identification, according to rules of symmetry and redundancy, of subtables designed to generate the entire table by means of appropriate combination operations. The search procedure in the correspondence table thus reduced is conveniently modified by means of the introduction of said combination operations. A preferential application is in mobile communication systems based upon standards, such as UMTS, CDMA2000, IS95 or WBCDMA.

公开(公告)号：DE60306894D1

公开(公告)日：2006-08-31

申请号：DE60306894

申请日：2003-05-07

Applicant: ST MICROELECTRONICS SRL

Inventor： RIMI FRANCESCO ,  PAPPALARDO FRANCESCO ,  AVELLONE GIUSEPPE ,  GALLUZZO AGOSTINO

IPC: H04B1/707

Abstract: In order to execute the cell-search procedure in a cellular communication system (such as a system based upon the 3GPP TDD standard), there are available identification codes for the second step (slot synchronization) and for the third step (identification of the scrambling codes). Said identification codes are identified by means of a process of correlation with the received signal and are used for obtaining from a correspondence table the parameters for the execution of the second step (CD) or of the third step (SCR). The correspondence table is stored in a reduced form by means of the identification, according to rules of symmetry and redundancy, of subtables designed to generate the entire table by means of appropriate combination operations. The search procedure in the correspondence table thus reduced is conveniently modified by means of the introduction of said combination operations. A preferential application is in mobile communication systems based upon standards, such as UMTS, CDMA2000, IS95 or WBCDMA.

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.