Patents by Inventor Lisa Meilhac
Lisa Meilhac 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: 11496343Abstract: A method for decoding an RF signal bearing a sequence of transmitted symbols modulated by CPM. The method includes, at the receiver: estimating model parameters {h, ?, ?0} among which h characterizes a modulation index, ? characterizes a carrier frequency offset and ?0 characterizes an initial phase offset, and detecting received symbols corresponding to said transmitted symbols of the sequence, wherein, at time nT where T is a symbol duration, the parameters {h, ?, ?0} are estimated by solving a system of three linear equations whose: three unknowns {?(n), {circumflex over (?)}(n), {circumflex over (?)}0(n)} are respectively function of said model parameters {h, ?, ?0}, and coefficients {B(n), C(n), D(n), F(n), G(n), H(n), v1(n), v2(n), v3(n)} are computed in a recursive way in function of: a sequence of symbols {ân} corresponding to the sequence of transmitted symbols up to time nT, and measured phases {?k} of samples {yk} of the RF signal received from time (n?1)T to time nT.Type: GrantFiled: September 7, 2021Date of Patent: November 8, 2022Assignee: RIVIERAWAVESInventors: Ahmad Bazzi, Lisa Meilhac
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Patent number: 11303310Abstract: It is provided a method designed, for OFDM-based communication systems, to slightly modify the signal to be emitted before the power amplifier input of the transmitter. The guiding idea is that the minimal IBO value for which the slightly modified signal still fulfills the standard requirements is inferior to the smallest IBO value for which the transmitted signal still meets the standard requirements in terms of EVM and spectral mask without implementing the proposed method.Type: GrantFiled: November 18, 2020Date of Patent: April 12, 2022Assignee: RIVIERA WAVES SASInventors: Lisa Meilhac, Ahmad Bazzi
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Publication number: 20220078057Abstract: The invention relates to a method for decoding an RF signal bearing a sequence of transmitted symbols modulated by CPM. The method comprises, at the receiver (1): Estimating model parameters {h, ?, ?0} among which h characterizes a modulation index, ? characterizes a carrier frequency offset and ?0 characterizes an initial phase offset, and Detecting received symbols corresponding to said transmitted symbols of the sequence, wherein, at time nT where T is a symbol duration, the parameters {h, ?, ?0} are estimated by solving a system of three linear equations whose: a. three unknowns {?(n), {circumflex over (?)}(n), {circumflex over (?)}0(n)}, are respectively function of said model parameters {h, ?, ?0}, and b. coefficients {B(n), C(n), D(n), F(n), G(n), H(n), v1(n), v2(n), v3(n)} are computed in a recursive way in function of: iii. a sequence of symbols {ân} corresponding to the sequence of transmitted symbols up to time nT, and iv.Type: ApplicationFiled: September 7, 2021Publication date: March 10, 2022Inventors: Ahmad BAZZI, Lisa MEILHAC
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Publication number: 20210152199Abstract: It is provided a method designed, for OFDM-based communication systems, to slightly modify the signal to be emitted before the power amplifier input of the transmitter. The guiding idea is that the minimal IBO value for which the slightly modified signal still fulfills the standard requirements is inferior to the smallest IBO value for which the transmitted signal still meets the standard requirements in terms of EVM and spectral mask without implementing the proposed method.Type: ApplicationFiled: November 18, 2020Publication date: May 20, 2021Inventors: Lisa MEILHAC, Ahmad BAZZI
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Patent number: 10686500Abstract: A method for obtaining a steering matrix Q to be applied for MU-MIMO transmission of data for a MU-MIMO communication system which comprises at least a transmitter comprising at least NTX=2 transmit antennas and K=2 receivers with each dth receiver comprising NRX(d) receive antennas, respectively, wherein ?d NRX(d)?NTX. The method is implemented at the level of the transmitter. The obtained steering matrix Q to be applied for DL-MU-MIMO transmission allows of supporting extended configurations of a DL-MU-MIMO communication system and allows of improving significantly the quality of subsequent DL-MU-MIMO transmissions, when the number of receive antennas ?d NRX(d) is larger than the number NTX of transmit antennas.Type: GrantFiled: November 13, 2018Date of Patent: June 16, 2020Assignee: RIVIERAWAVES (RW)Inventors: Lisa Meilhac, Ahmad Bazzi
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Publication number: 20190149201Abstract: A method for obtaining a steering matrix Q to be applied for MU-MIMO transmission of data for a MU-MIMO communication system which comprises at least a transmitter comprising at least NTX=2 transmit antennas and K=2 receivers with each dth receiver comprising NRX(d) receive antennas, respectively, wherein ?d NRX(d)?NTX. The method is implemented at the level of the transmitter. The obtained steering matrix Q to be applied for DL-MU-MIMO transmission allows of supporting extended configurations of a DL-MU-MIMO communication system and allows of improving significantly the quality of subsequent DL-MU-MIMO transmissions, when the number of receive antennas ?d NRX(d) is larger than the number NTX of transmit antennas.Type: ApplicationFiled: November 13, 2018Publication date: May 16, 2019Inventors: Lisa MEILHAC, Ahmad BAZZI
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Patent number: 9680709Abstract: A method for determining the bandwidth of an incoming frame in a wireless local area network (WLAN), includes the following steps, executed at least by a processor, upon reception of a first plurality of samples representative of a first signal of the frame received at a primary WLAN channel, and of a second plurality of samples of the frame representative of a second signal of the frame received at a secondary WLAN channel: computing at least a correlation of a sample among the first plurality of samples with a sample among the second plurality of samples; if the correlation exceeds a threshold then setting a receiver mode to a first bandwidth otherwise setting a receiver mode to a second bandwidth. A device for setting the bandwidth of a receiver for a wireless local area network and a system integrating such device are also described.Type: GrantFiled: November 14, 2014Date of Patent: June 13, 2017Assignee: RIVIERAWAVES (RW)Inventors: Lisa Meilhac, Cedric Vandeburie
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Publication number: 20150139008Abstract: A method for determining the bandwidth of an incoming frame in a wireless local area network (WLAN), includes the following steps, executed at least by a processor, upon reception of a first plurality of samples representative of a first signal of the frame received at a primary WLAN channel, and of a second plurality of samples of the frame representative of a second signal of the frame received at a secondary WLAN channel: computing at least a correlation of a sample among the first plurality of samples with a sample among the second plurality of samples; if the correlation exceeds a threshold then setting a receiver mode to a first bandwidth otherwise setting a receiver mode to a second bandwidth. A device for setting the bandwidth of a receiver for a wireless local area network and a system integrating such device are also described.Type: ApplicationFiled: November 14, 2014Publication date: May 21, 2015Applicant: RIVIERAWAVES (RW)Inventors: Lisa MEILHAC, Cedric VANDEBURIE
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Patent number: 8526515Abstract: A method and system for link quality metric based antenna selection for transceiver are disclosed. In one embodiment, a method for selecting an antenna from multiple antennas associated with a receiver, includes receiving multi-carrier modulated signals via a currently active antenna of the receiver, and estimating a predicted packet error rate (PER) associated with a current receive path of the receiver. The current receive path is used to process the multi-carrier modulated signals. The method further includes selecting a next antenna from the multiple antennas for forming a next receive path of the receiver based on the predicted PER and a packet error history associated with at least one previous receive path.Type: GrantFiled: October 10, 2008Date of Patent: September 3, 2013Assignee: Wipro LimitedInventors: Antoine Calando, Franck Fleter, Tobias Jensen-Lindstrøm, Shashi Kant, Lisa Meilhac, Joachim Wehinger
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Publication number: 20100091891Abstract: A method and system for link quality metric based antenna selection for transceiver are disclosed. In one embodiment, a method for selecting an antenna from multiple antennas associated with a receiver, includes receiving multi-carrier modulated signals via a currently active antenna of the receiver, and estimating a predicted packet error rate (PER) associated with a current receive path of the receiver. The current receive path is used to process the multi-carrier modulated signals. The method further includes selecting a next antenna from the multiple antennas for forming a next receive path of the receiver based on the predicted PER and a packet error history associated with at least one previous receive path.Type: ApplicationFiled: October 10, 2008Publication date: April 15, 2010Applicant: WIPRO LIMITEDInventors: ANTOINE CALANDO, Franck Fleter, Tobias Jensen-Lindstrom, Shashi Kant, Lisa Meilhac, Joachim Wehinger
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Patent number: 7539167Abstract: The invention relates to a spread spectrum receiver for receiving and decoding an input signal r(k) consisting of a sequence of chips and a method for carrier frequency offset compensation in such a spread spectrum receiver.Type: GrantFiled: January 5, 2006Date of Patent: May 26, 2009Assignee: NewLogic Technologies GmbHInventors: Lisa Meilhac, Jonathan Adlard
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Publication number: 20070073796Abstract: The invention relates to a method and apparatus for computing a 2N-point Fourier transform, direct or inverse, out of a 2N-sample input sequence. According to the invention, a signal processing method and apparatus is provided that makes use of an existing N-point FFT processor as well as other blocks such as a CORDIC or a filter to compute the 2N-point FFT.Type: ApplicationFiled: September 18, 2006Publication date: March 29, 2007Applicant: NEWLOGIC TECHNOLOGIES AGInventors: Lisa Meilhac, Alain Chiodini
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Publication number: 20060171361Abstract: The invention relates to a spread spectrum receiver for receiving and decoding an input signal r(k) consisting of a sequence of chips and a method for carrier frequency offset compensation in such a spread spectrum receiver.Type: ApplicationFiled: January 5, 2006Publication date: August 3, 2006Inventors: Lisa Meilhac, Jonathan Adlard
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Patent number: 7079052Abstract: The present invention relates to a method of source decoding of a variable-length codeword sequence, the decoding being based on an associated codeword table. It is characterized in that it comprises the steps of: creating a tree with tree-paths (T-PTH) and branches (B), decoding a received sequence (SQr), the step comprising the sub-steps of: extending the best tree-paths (BT_PTH) in the tree by computing first cumulative metrics (CM_LPTH) of the succeeding branches (B), selecting the codewords (CWDi) corresponding to the best tree-paths (BT_PTH), and saving corresponding data in paths (PTH), the corresponding data comprising second cumulative metrics (CM_STCK), reordering the saved paths (PTH) in accordance with their second cumulative metrics (CM_STCK), testing a priori conditions on top path (TOP_PTH), and if they are verified, outputting said top path, or otherwise returning to the extension sub-step.Type: GrantFiled: November 13, 2002Date of Patent: July 18, 2006Assignee: Koninklijke Philips Electronics N.V.Inventors: Catherine Lamy, Lisa Meilhac
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Publication number: 20050011365Abstract: The present invention relates to a transmission system for transmitting source application data units to a destination application via a network comprising a plurality of network protocol stacks. Such a transmission system provides a solution for transmitting additional information from a layer of a first network protocol stack to a layer of a second network protocol stack, without disturbing the way in which ordinary streams are processed.Type: ApplicationFiled: December 6, 2002Publication date: January 20, 2005Inventors: Catherine Lamy, Sandrine Merigeault, Lisa Meilhac
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Publication number: 20040259098Abstract: The present invention relates to a method of source decoding of a variable-length codeword sequence, said decoding being based on an associated codeword table.Type: ApplicationFiled: May 7, 2004Publication date: December 23, 2004Inventors: Catherine Lamy, Lisa Meilhac