Patents by Inventor Damien Castelain

Damien Castelain 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).

  • Patent number: 11240086
    Abstract: The present invention concerns a method and device for transferring, by an emitter, a flow of samples to a receiver through a wireless interface using Single-Carrier Frequency Division Multiple Access. The emitter: —selects consecutive blocks of M samples of the flow of samples, —modulates each selected block, —selects, for each modulated block, half of the modulated block located in the center of the modulated block, —selects, with a M/2 sample shift, consecutive blocks of M samples, —modulates each selected block with the shift, —selects, for each modulated block with the shift, half of the modulated block with the shift located in the center of the modulated block with the shift, —forms a stream composed of one in two half ordered modulated blocks and, between two half ordered modulated blocks, one half ordered modulated block with the shift, —transfers the formed stream.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: February 1, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien Castelain
  • Publication number: 20210306196
    Abstract: The present invention concerns a method and device for transferring, by an emitter, a flow of samples to a receiver through a wireless interface using Single-Carrier Frequency Division Multiple Access. The emitter: —selects consecutive blocks of M samples of the flow of samples, —modulates each selected block, —selects, for each modulated block, half of the modulated block located in the center of the modulated block, —selects, with a M/2 sample shift, consecutive blocks of M samples, —modulates each selected block with the shift, —selects, for each modulated block with the shift, half of the modulated block with the shift located in the center of the modulated block with the shift, —forms a stream composed of one in two half ordered modulated blocks and, between two half ordered modulated blocks, one half ordered modulated block with the shift, —transfers the formed stream.
    Type: Application
    Filed: September 6, 2019
    Publication date: September 30, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien CASTELAIN
  • Patent number: 10756941
    Abstract: The method: extracts symbols at pilot positions from the received stream of symbols, estimates noise variances at pilot positions, determines a rough channel estimation from the symbols extracted at pilot positions, determines weighting coefficients from the estimated noise variances, weights the rough channel estimation by the determined weighting coefficients, filters the weighted rough channel estimation using predetermined coefficients, at least one predetermined coefficient being different from the other predetermined coefficients, the predetermined coefficients being determined for a constant noise variance, determines normalization coefficients from the determined weighting coefficients and predetermined filter coefficients, normalizes the filtered weighted rough channel estimation using the determined normalization coefficients.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: August 25, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Damien Castelain, Yuji Matsuki
  • Publication number: 20200252256
    Abstract: The method: extracts symbols at pilot positions from the received stream of symbols, estimates noise variances at pilot positions, determines a rough channel estimation from the symbols extracted at pilot positions, determines weighting coefficients from the estimated noise variances, weights the rough channel estimation by the determined weighting coefficients, filters the weighted rough channel estimation using predetermined coefficients, at least one predetermined coefficient being different from the other predetermined coefficients, the predetermined coefficients being determined for a constant noise variance, determines normalization coefficients from the determined weighting coefficients and predetermined filter coefficients, normalizes the filtered weighted rough channel estimation using the determined normalization coefficients.
    Type: Application
    Filed: July 6, 2017
    Publication date: August 6, 2020
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Damien CASTELAIN, Yuji MATSUKI
  • Patent number: 10511410
    Abstract: The present invention concerns a method and device for demodulating received symbols using a turbo-demodulation scheme comprising an iterative channel equalization and wherein an iterative channel decoder is used in the turbo-demodulation scheme, characterized in that the iterative channel decoder performs a first iterative process named iterative decoding process, the turbo-demodulation performing a second iterative process named iterative demodulation and decoding process, at each iteration of the second iterative process, the iterative channel decoder executing plural iterations in order to decode bits from which symbols are derived from. The iterative channel decoder: —memorizes at the end of the iterations of the first iterative process, the variables used internally by the iterative channel decoder, —reads the memorized variables at the following iteration of the second iterative process.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: December 17, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien Castelain
  • Patent number: 10454502
    Abstract: The present invention concerns a method and device for demodulating received symbols using a turbo-demodulation scheme comprising an iterative MIMO decoder and wherein an iterative channel decoder is used in the turbo-demodulation scheme, wherein the iterative channel decoder performs a first iterative process named iterative decoding process, the turbo-demodulation performing a second iterative process named iterative demodulation and decoding process, at each iteration of the second iterative process, the iterative channel decoder executing plural iterations in order to decode bits from which symbols are derived from. The iterative channel decoder: memorizes at the end of the iterations of the first iterative process, the variables used internally by the iterative channel decoder, reads the memorized variables at the following iteration of the second iterative process.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: October 22, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien Castelain
  • Patent number: 10382068
    Abstract: The present invention concerns a method and device for demodulating received symbols using a turbo-demodulation scheme comprising an iterative de-mapping and wherein an iterative channel decoder is used in the turbo-demodulation scheme, characterized in that the iterative channel decoder performs a first iterative process named iterative decoding process, the turbo-demodulation performing a second iterative process named iterative demodulation and decoding process, at each iteration of the second iterative process, the iterative channel decoder executing plural iterations in order to decode bits from which symbols are derived from, and wherein the iterative channel decoder: memorizes at the end of the iterations of the first iterative process, the variables used internally by the iterative channel decoder, reads the memorized variables at the following iteration of the second iterative process.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: August 13, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventor: Damien Castelain
  • Publication number: 20190052289
    Abstract: The present invention concerns a method and device for demodulating received symbols using a turbo-demodulation scheme comprising an iterative de-mapping and wherein an iterative channel decoder is used in the turbo-demodulation scheme, characterized in that the iterative channel decoder performs a first iterative process named iterative decoding process, the turbo-demodulation performing a second iterative process named iterative demodulation and decoding process, at each iteration of the second iterative process, the iterative channel decoder executing plural iterations in order to decode bits from which symbols are derived from, and wherein the iterative channel decoder: memorizes at the end of the iterations of the first iterative process, the variables used internally by the iterative channel decoder, reads the memorized variables at the following iteration of the second iterative process.
    Type: Application
    Filed: September 15, 2016
    Publication date: February 14, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien CASTELAIN
  • Publication number: 20180234208
    Abstract: The present invention concerns a method and device for demodulating received symbols using a turbo-demodulation scheme comprising an iterative channel equalization and wherein an iterative channel decoder is used in the turbo-demodulation scheme, characterized in that the iterative channel decoder performs a first iterative process named iterative decoding process, the turbo-demodulation performing a second iterative process named iterative demodulation and decoding process, at each iteration of the second iterative process, the iterative channel decoder executing plural iterations in order to decode bits from which symbols are derived from. The iterative channel decoder: memorizes at the end of the iterations of the first iterative process, the variables used internally by the iterative channel decoder, reads the memorized variables at the following iteration of the second iterative process.
    Type: Application
    Filed: September 15, 2016
    Publication date: August 16, 2018
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien CASTELAIN
  • Publication number: 20180226998
    Abstract: The present invention concerns a method and device for demodulating received symbols using a turbo-demodulation scheme comprising an iterative MIMO decoder and wherein an iterative channel decoder is used in the turbo-demodulation scheme, wherein the iterative channel decoder performs a first iterative process named iterative decoding process, the turbo-demodulation performing a second iterative process named iterative demodulation and decoding process, at each iteration of the second iterative process, the iterative channel decoder executing plural iterations in order to decode bits from which symbols are derived from. The iterative channel decoder: memorizes at the end of the iterations of the first iterative process, the variables used internally by the iterative channel decoder, reads the memorized variables at the following iteration of the second iterative process.
    Type: Application
    Filed: August 31, 2016
    Publication date: August 9, 2018
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien CASTELAIN
  • Patent number: 9735997
    Abstract: The present invention concerns a method for correcting a frequency shift on symbols received by a receiver, each symbol being composed of N samples and of a cyclic prefix of a predetermined number ? samples, the ? samples being a copy of ? samples of the N samples. The receiver: —calculates for each symbol, a correlation between at most the ? samples of the cyclic prefix and the at most ? samples among the last samples, —averages the correlations over a number of symbols and determines one smooth frequency shift estimation for each averaged correlation, —calculates an exponential from the smooth frequency shift estimation, delays the received symbols by a delay, —multiplies the exponential by the delayed received symbols.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: August 15, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien Castelain
  • Patent number: 9614634
    Abstract: The present invention concerns a method for cancelling a narrow band interference in a single carrier signal. The method comprises the steps executed by a receiver of: receiving the single carrier signal and transforming the single carrier signal into received symbols, transforming the received symbols from the time domain to the frequency domain into received symbols in the frequency domain, determining a signal and thermal noise power estimation based on the received symbol powers in the frequency domain, estimating variances of the narrow hand interference from the signal and thermal noise power estimation and the received symbol powers in the frequency domain, equalizing the received symbols in the frequency domain or symbols derived from the received symbols in the frequency domain taking into account the estimate of the variances of the narrow band interference.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: April 4, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien Castelain
  • Patent number: 9363129
    Abstract: A method for decoding differentially modulated received symbols, the differentially modulated received symbols corresponding to a transmission of a differentially modulated version of a codeword out of a set of possible codewords, the received symbols being transferred onto resources of a channel, the resources being equally spaced. A receiver, for each possible codeword: obtains a vector of differentially demodulated symbols by differentially demodulating the differentially modulated received symbols obtained by combining two consecutive differentially modulated received symbols; calculates the product of each differentially demodulated symbol by the conjugate of the element of the codeword having the same rank within the codeword as the differentially demodulated received symbol; calculates the sum of the products; decodes the vector of differentially demodulated symbols by selecting the codeword for which the sum of the products is the maximum.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: June 7, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Damien Castelain, Cristina Ciochina
  • Patent number: 9331755
    Abstract: A method and device for transferring OFDM symbols representative of at least a first and a second stream from a source including a first number of antenna to at least one receiver. The source demultiplexes the first stream to extract at least one first pilot sequence and first data and the second stream to extract at least one second pilot sequence and second data, multiplies the at least one first pilot sequence and first data by a first coefficient, the at least one second pilot sequence and second data by a second coefficient different from the first coefficient, sums first multiplied data and second multiplied data, multiplexes the sum, the at least one first and second multiplied pilot sequences to form the OFDM symbols, and transfers the OFDM symbols.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: May 3, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Damien Castelain, Cristina Ciochina
  • Patent number: 9173112
    Abstract: In a wireless communication system a frame composed of plural single carrier orthogonal frequency division multiplex symbols is transferred between a source and a receiver. The frame includes at least one hybrid symbol which is composed of at least one pilot sequence which is mapped on one subcarrier in two of at least a part of subcarriers on which the hybrid symbol is mapped and of discrete Fourier transformed data which are mapped on at least subcarriers comprised between two subcarriers on which the at least one pilot sequence is mapped. The at least one pilot sequence has the property that the variations of amplitudes obtained after performing a discrete Fourier transform over the at least one pilot sequence are limited. The frame also includes other symbols composed of discrete Fourier transformed data only.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: October 27, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien Castelain
  • Publication number: 20150280760
    Abstract: The present invention concerns a method for cancelling a narrow band interference in a single carrier signal, characterized in that the method comprises the steps executed by a receiver of: receiving the single carrier signal and transforming the single carrier signal into received symbols, transforming the received symbols from the time domain to the frequency domain into received symbols in the frequency domain, determining a threshold based on the received symbols in the frequency domain, truncating the amplitudes of the received symbols in the frequency domain at the determined threshold, performing a channel estimation based on the truncated received symbols in the frequency domain.
    Type: Application
    Filed: March 4, 2015
    Publication date: October 1, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien CASTELAIN
  • Publication number: 20150280848
    Abstract: The present invention concerns a method for cancelling a narrow band interference in a single carrier signal. The method comprises the steps executed by a receiver of: receiving the single carrier signal and transforming the single carrier signal into received symbols, transforming the received symbols from the time domain to the frequency domain into received symbols in the frequency domain, determining a signal and thermal noise power estimation based on the received symbol powers in the frequency domain, estimating variances of the narrow hand interference from the signal and thermal noise power estimation and the received symbol powers in the frequency domain, equalizing the received symbols in the frequency domain or symbols derived from the received symbols in the frequency domain taking into account the estimate of the variances of the narrow band interference.
    Type: Application
    Filed: March 4, 2015
    Publication date: October 1, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien CASTELAIN
  • Publication number: 20150244555
    Abstract: The present invention concerns a method for correcting a frequency shift on symbols received by a receiver, each symbol being composed of N samples and of a cyclic prefix of a predetermined number ? samples, the ? samples being a copy of ? samples of the N samples. The receiver: —calculates for each symbol, a correlation between at most the ? samples of the cyclic prefix and the at most ? samples among the last samples, —averages the correlations over a number of symbols and determines one smooth frequency shift estimation for each averaged correlation, —calculates an exponential from the smooth frequency shift estimation, —delays the received symbols by a delay, —multiplies the exponential by the delayed received symbols.
    Type: Application
    Filed: August 26, 2013
    Publication date: August 27, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Damien Castelain
  • Patent number: 9060383
    Abstract: A method for deciding if a telecommunication device has to be switched in an operating mode which is different from the operating mode in which the telecommunication is operating. In an operating mode, the telecommunication device relays signals transferred between a terminal and an access node which handles the terminal. In another operating mode, the telecommunication device handles the terminal. The method includes: determining, from obtained information, if a predetermined event occurs, and if the predetermined event occurs, deciding that a handover of the terminal has to be conducted between the access node and the telecommunication device, and deciding that the telecommunication device has to switch in an operating mode which is different from the operating mode in which the telecommunication is operating.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: June 16, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Herve Bonneville, Loic Brunel, Damien Castelain, Nicolas Gresset, David Mottier
  • Patent number: 9036726
    Abstract: A method for increasing the amount of information bits comprised in a symbol transferred by a source to at least one receiver. The symbol is representative of a modulated base sequence obtained by encoding a sequence of base bits selected by the source and by modulating the encoded selected sequence. The modulated base sequence has fixed points. The source encodes the selected sequence of base bits and a sequence of supplementary bits, obtains a modulated base sequence by modulating the encoded selected sequence of base bits, obtains a modulated altering sequence by modulating the sequence of supplementary bits, alters the modulated base sequence by modifying at least a part of the values of its fixed points using the modulated altering sequence in order to obtain a modulated altered sequence, and transfers the modulated altered sequence under the form of an altered symbol.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: May 19, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Damien Castelain, Cristina Ciochina