Stmicroelectronics S.r.l.

Stmicroelectronics N.v.

Stmicroelectronics S.a.

Ettore Messina

Friedbert Berens

Giuseppe Avellone

Agostino Galluzzo

Daniele Lo Iacono

Elena Salurso

Miguel Kirsch

Alberto Serratore

Stéphane Tanrikulu

Nicolò Ivan Piazzese

Laurent Chalard

Maristella Frazzetto

Stèphane Erkan Tanrikulu

Giuseppe Lippolis

Alessandro Lattuca

Nicolo Ivan Piazzese

A method and a system for the acquisition and tracking of BOC(m,n) modulated codes, m/n equal to an integer, in which a correlation function is calculated of the BOC(m,n) modulated code received from a remote transmitter with a code wlocally generated at a receiver terminal according to one from the following the relationships:(&#x3c4;)=(&#x3c4;)&#x2212;(&#x3c4;/2)&#x2212;(&#x3c4;/2)](&#x3c4;)=(&#x3c4;)&#x2212;(&#x3c4;/2)&#x2212;(&#x3c4;/2)](&#x3c4;)=(&#x3c4;)&#x2212;(&#x3c4;/4)+(&#x3c4;/4)](&#x3c4;)=(&#x3c4;)&#x2212;(&#x3c4;/4)+(&#x3c4;/4)](&#x3c4;)=[(&#x3c4;/4)+(&#x3c4;/4)](&#x3c4;)=[(&#x3c4;/2)&#x2212;(&#x3c4;/2)]

Method and system for resolving the acquisition ambiguity and the problem of false lock in tracking BOC(m,n) modulated signals, particularly for satellite positioning/navigation systems

A method for detecting an eventual channel intended to a designated user equipment among n channels received by the designated user equipment during a given duration, each channel received during the duration carrying encoded data masked with an identifier associated to a user equipment. The method includes a selecting phase having a demasking step demasking the received masked encoded data of each channel with the identifier of the designated user equipment, a decoding step decoding the demasked encoded data of each channel to obtain a set of digital decoded data for each channel, a calculating step calculating, from each set of digital decoded data, a global information representative of a confidence in digital data received on the physical channel, and a detecting step detecting the channel from all the global information.

Method and system for blindly detecting a discontinuously transmitted shared channel, in particular blind high speed shared control channels detection

A device for decoding an incident FEC encoded packet of data within an ARQ scheme. The device includes a processor or processing means for performing successive decoding processes of successive intermediate FEC code encoded packets related to the incident FEC code encoded packet. The processor or processing means includes a FEC decoder. The processor or processing means included a determination unit or determination means for determining initial decoding conditions from the FEC code decoding result concerning the preceding intermediate FEC code encoded packet and from the current intermediate FEC code encoded packet, and the FEC decoder is for performing the current FEC code decoding using the initial decoding conditions.

Method and device for decoding packets of data within a hybrid ARQ scheme

A method for automatic gain control of an output signal generated from an input signal includes measuring power of the output signal. Measuring power of the output signal includes setting at least one power threshold, measuring a rate of crossing of the at least one power threshold by the output signal over an observation window, and deriving from the rate of crossing a measured power of the output signal. The method further includes providing a reference power, subtracting the measured power from the reference power to obtain an error signal, and mixing the input signal with the error signal. An analog-to-digital conversion is performed on a result of the mixing to obtain a gain-controlled output signal.

Method for automatic gain control, for instance in a telecommunication system, device and computer program product therefor

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. The first m-sequence and the second m-sequence are modulo-2 added to form the I branch of the primary scrambling code. A first T-bit masking word and a second T-bit masking word of rankare generated that correspond to the polynomial time shifts, and the intermediate taps of the X and y registers respectively chosen by the masking words 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 the primary scrambling code. 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 the set identified by the primary scrambling code of order N, a fifth sequence is generated, which, modulo-2 added to the second sequence, forms the I branch of the secondary scrambling code. By modulo-2 summing the intermediate taps of the register X masked by the first masking word of rank N, a sixth sequence is generated, which, modulo-2 added to the fourth sequence, forms the Q branch of the secondary scrambling code.

Process for generating codes for CDMA communications, system and computer program product therefor

A method is provided for decoding a turbo-code encoded signal in a receiver. According to the method, the signal is received from a transmission channel, and the signal is digitally turbo-code decoded. Additionally, a quality information representative of conditions of the channel state estimation is dynamically determined, and the quality information is dynamically compared with a predetermined criteria for defining good or bad estimation conditions. A Maximum-A-Posteriori algorithm in the logarithmic domain is dynamically selected for good estimation conditions, or an approximation of the Maximum-A-Posteriori algorithm in the logarithmic domain is dynamically selected for bad estimation conditions. Also provided is a receiver that implements such a decoding method.

Method of decoding a turbo-code encoded signal in a receiver and corresponding receiver

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.

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Crozet, France

Ettore Messina