Patents by Inventor Eric Alliot
Eric Alliot has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9350415Abstract: Process of a finger assignment in a rake receiver for a wireless communication device comprising the following steps: —detection (21) of a pilot (CPICH) and the comparison of its energy according to a first threshold value; —detection (22), on the basis of said first threshold value, of a first significant path; —assignment (23) of said first significant path to a first finger of the rake receiver; —determination (24) of an observation window; —application (25) of a second threshold value, distinct and lower than said first value, for the detection of secondary paths; —rake fingers assignment to secondary paths detected.Type: GrantFiled: March 11, 2010Date of Patent: May 24, 2016Assignee: ST-ERICSSON SAInventors: Pierre Demaj, Fabrizio Tomatis, Eric Alliot
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Patent number: 9306783Abstract: Method of data processing for selectively activating, at a mobile station, a mode of communication related to VAMOS-2 technology. The method includes the steps of: receiving a first signal of a first subchannel, the first signal containing a first training sequence, and receiving a second signal of a second subchannel, the second signal containing a second training sequence, the second signal being orthogonally multiplexed with respect to the first signal, and using the first training sequence and the second training sequence to: determine a value of a parameter defining a ratio between the first subchannel power and the second subchannel power, and determine a signal to noise ratio estimation, and determine, using the parameter value and the signal to noise estimation, whether the mode of communication has to be activated.Type: GrantFiled: October 4, 2012Date of Patent: April 5, 2016Assignee: ST-ERICSSON SAInventors: Marc Soler, Eric Alliot
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Patent number: 9225469Abstract: A method for determining a length of a message block of k bits from a length candidate set, comprising steps of: —Selecting (401) a length candidate (N) among the set; —Decoding (402) a received frame to form a decoded sequence that includes a message of a length equal to the length candidate (N), by a Viterbi decoder; —Calculating (402) a Viterbi variable (S(N)) for this candidate (N), —Comparing (403) the Viterbi variable with a threshold (?), —Repeating the selecting (401), decoding (402) and calculating (402) steps if said Viterbi variable (S(N)) is greater than the threshold (?) and if there exists an unselected length candidate among the set; —If the Viterbi variable is greater than a best value (Sbest), updating this best value to the Viterbi variable and updating a best length (Nend) to this candidate; —Wherein the threshold (?) is initially set to a value determined according to the conditions of reception of the receiver.Type: GrantFiled: June 26, 2013Date of Patent: December 29, 2015Assignee: ST-ERICSSON SAInventor: Eric Alliot
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Publication number: 20150172000Abstract: A method for determining a length of a message block of k bits from a length candidate set, comprising steps of: —Selecting (401) a length candidate (N) among the set; —Decoding (402) a received frame to form a decoded sequence that includes a message of a length equal to the length candidate (N), by a Viterbi decoder; —Calculating (402) a Viterbi variable (S(N)) for this candidate (N), —Comparing (403) the Viterbi variable with a threshold (?), —Repeating the selecting (401), decoding (402) and calculating (402) steps if said Viterbi variable (S(N)) is greater than the threshold (?) and if there exists an unselected length candidate among the set; —If the Viterbi variable is greater than a best value (Sbest), updating this best value to the Viterbi variable and updating a best length (Nend) to this candidate; —Wherein the threshold (?) is initially set to a value determined according to the conditions of reception of the receiver.Type: ApplicationFiled: June 26, 2013Publication date: June 18, 2015Inventor: Eric Alliot
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Publication number: 20140315534Abstract: Method of data processing for selectively activating, at a mobile station (1, 2), a mode of communication related to VAMOS-2 technology, the method comprising the steps of:—receiving a first signal of a first subchannel (C1), the first signal containing a first training sequence (mwant), and receiving a second signal of a second subchannel (C2), the second signal containing a second training sequence (mosc), the second signal being orthogonally multiplexed with respect to the first signal,—using the first training sequence and the second training sequence to:—determine a value of a parameter (?) defining a ratio between the first subchannel power and the second subchannel power, and—determine a signal to noise ratio estimation, and—determining, using the parameter value and the signal to noise estimation, whether the said mode of communication has to be activated.Type: ApplicationFiled: October 4, 2012Publication date: October 23, 2014Inventors: Marc Soler, Eric Alliot
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Patent number: 8831078Abstract: Method for identifying within an incident signal at least one frequency communication channel, the incident signal being received on a wireless apparatus, comprising determining a power spectral density (PSD) of that incident signal and identifying the at least one channel from the PSD. The PSD determination comprises storing temporal samples of the incident signal received during a predetermined duration and performing a first Discrete Fourier Transform (DFT) processing on the stored samples.Type: GrantFiled: December 1, 2010Date of Patent: September 9, 2014Assignee: Ericsson Modems SAInventors: Eric Alliot, Mark Wallis, Issam Toufik
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Patent number: 8295327Abstract: The invention is directed towards a method and apparatus for estimating a noise variance in a receiver of a code multiplex telecommunications system with orthogonal spreading codes, wherein respective real and imaginary parts of a sum and a difference of two estimated symbols having substantially same amplitudes are determined, and then respective minimum energy components of the determined real and imaginary parts of the sum and difference are determined. The respective minimum energy components are finally combined to obtain the noise variance. Thereby, noise variance can be estimated simply based on addition and comparison operations, which reduces complexity and processing load.Type: GrantFiled: May 10, 2007Date of Patent: October 23, 2012Assignee: ST-Ericsson SAInventors: Ahmet Bastug, Eric Alliot
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Publication number: 20120236919Abstract: Method for identifying within an incident signal at least one frequency communication channel, said incident signal being received on a wireless apparatus, comprising determining a power spectral density (PSD) of that incident signal and identifying said at least one channel from said PSD. The said PSD determination comprises storing temporal samples of said incident signal received during a predetermined duration and performing a first Discrete Fourier Transform (DFT) processing on said stored samples.Type: ApplicationFiled: December 1, 2010Publication date: September 20, 2012Applicants: ST-ERICSSON SA, ST-ERICSSON (FRANCE) SASInventors: Eric Alliot, Mark Wallis, Issam Toufik
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Publication number: 20120002706Abstract: Process of a finger assignment in a rake receiver for a wireless communication device comprising the following steps:—detection (21) of a pilot (CPICH) and the comparison of its energy according to a first threshold value;—detection (22), on the basis of said first threshold value, of a first significant path;—assignment (23) of said first significant path to a first finger of the rake receiver;—determination (24) of an observation window;—application (25) of a second threshold value, distinct and lower than said first value, for the detection of secondary paths;—rake fingers assignment to secondary paths detected.Type: ApplicationFiled: March 11, 2010Publication date: January 5, 2012Inventors: Pierre Demaj, Fabrizio Tomatis, Eric Alliot
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Patent number: 7835261Abstract: The invention relates to a mobile communication apparatus (200) comprising a receiver (203), a derotator (206), a demodulator (208) and a processor (212). The receiver (203) is connected to the derotator (206), the derotator (206) to the demodulator (208), and the controller (212) to the receiver (203), derotator (206) and demodulator (208). The derotator (206) comprises means for processing Primary Common Control Physical Channel during Space Time coding based Transmit Diversity transmission mode, pilot symbols, symbols during closed loop transmission modes, and means for outputting symbols to the demodulator in a temporal ordered sequence. The means are connected in series for enabling a universal derotator. A method for derotation is provided, comprising the steps of processing P-CCPCH during STTD transmission mode (1002), processing pilot symbols (1004), processing symbols during closed loop transmission modes (1006), and outputting symbols in a temporal ordered sequence (1008).Type: GrantFiled: December 14, 2004Date of Patent: November 16, 2010Assignee: NXP B.V.Inventors: Eric Alliot, Rodolfo Verzegnassi
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Publication number: 20100142657Abstract: A method and associated module for selection of a maximum peak in a correlation signal corresponding to the correlation between a code periodically transmitted by a transmitter, and an input signal received by a receiver on a radio channel, includes a selection criteria which is the time recurrence of the same position of peaks of correlation, taking into account a margin around the peak position compensating for a drift due to a frequency offset between the receiver and the transmitter.Type: ApplicationFiled: October 9, 2007Publication date: June 10, 2010Inventors: Eric Alliot, Fabrizio Tomatis
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Publication number: 20100027589Abstract: The invention is directed towards a method and apparatus for estimating a noise variance in a receiver of a code multiplex telecommunications system with orthogonal spreading codes, wherein respective real and imaginary parts of a sum and a difference of two estimated symbols having substantially same amplitudes are determined, and then respective minimum energy components of the determined real and imaginary parts of the sum and difference are determined. The respective minimum energy components are finally combined to obtain the noise variance. Thereby, noise variance can be estimated simply based on addition and comparison operations, which reduces complexity and processing load.Type: ApplicationFiled: May 10, 2007Publication date: February 4, 2010Inventors: Ahmet Bastug, Eric Alliot
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Publication number: 20070104251Abstract: The invention relates to a mobile communication apparatus (200) comprising a receiver (203), a derotator (206), a demodulator (208) and a processor (212). The receiver (203) is connected to the derotator (206), the derotator (206) to the demodulator (208), and the controller (212) to the receiver (203), derotator (206) and demodulator (208). The derotator (206) comprises means for processing Primary Common Control Physical Channel during Space Time coding based Transmit Diversity transmission mode, pilot symbols, symbols during closed loop transmission modes, and means for outputting symbols to the demodulator in a temporal ordered sequence. The means are connected in series for enabling a universal derotator. A method for derotation is provided, comprising the steps of processing P-CCPCH during STTD transmission mode (1002), processing pilot symbols (1004), processing symbols during closed loop transmission modes (1006), and outputting symbols in a temporal ordered sequence (1008).Type: ApplicationFiled: December 14, 2004Publication date: May 10, 2007Inventors: Eric Alliot, Rodolfo Verzegnassi