Patents by Inventor Alexandre Pierrot
Alexandre Pierrot 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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Publication number: 20240113917Abstract: Methods, systems, and devices for wireless communications are described. A wireless device may receive an assignment of a set of resources associated with a channel where the set of resources includes a first subset of resources allocated for data transmission and a second subset of resources allocated for a reference signal. The wireless device may generate multiple channel estimations per layer of the channel and perform a refinement operation utilizing the estimations to generate a channel estimation associated with multiple layers. Each iteration of the refinement operation may include generating respective gradients associated with each per layer channel estimation; generating a current set of values of a latent variable; and modifying the channel estimations.Type: ApplicationFiled: September 23, 2022Publication date: April 4, 2024Inventors: Kumar Pratik, Arash Behboodi, Pouriya Sadeghi, Tharun Adithya Srikrishnan, Alexandre Pierrot, Joseph Binamira Soriaga, Supratik Bhattacharjee
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Publication number: 20240113919Abstract: Methods, systems, and devices for wireless communications are described. A wireless device may receive an assignment of a set of resources associated with a channel, where the set of resources includes a first subset of resources allocated for data transmission and a second subset of resources allocated for a reference signal. The wireless device may generate, from the reference signal in accordance with a minimum mean square estimation (MMSE) operation, a first set of multiple channel estimations per layer of the channel. The wireless device may generate, in accordance with a nonlinear two-dimensional interpolation of the channel, a second set of multiple channel estimations per layer of the channel and may perform a refinement operation utilizing the estimations to generate a channel estimation associated with multiple layers.Type: ApplicationFiled: September 21, 2023Publication date: April 4, 2024Inventors: Kumar PRATIK, Arash BEHBOODI, Pouriya SADEGHI, Tharun Adithya SRIKRISHNAN, Alexandre PIERROT, Joseph Binamira SORIAGA, Gautham HARIHARAN, Supratik BHATTACHARJEE
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Publication number: 20230239016Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a signal. The UE may measure the signal to explore one or more inactive ranks or inactive precoders. The UE may transmit, based at least in part on the measuring, a report that includes channel state information for at least one of the one or more inactive ranks or inactive precoders. Numerous other aspects are described.Type: ApplicationFiled: January 21, 2022Publication date: July 27, 2023Inventors: Navin Dunichand ANWANI, Supratik BHATTACHARJEE, Pouriya SADEGHI, Sanaz BARGHI, Gautham HARIHARAN, Ashutosh Vinod AGRAWAL, Alexandre PIERROT, Ali KOOCHAKZADEH
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Patent number: 11152953Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a first device may transmit a signal to a second device including a number of error detection bits interleaved with a number of information bits. The second device may use the error detection bits to determine if the signal was received correctly, where each error detection bit may be associated with a set of information bits. The second device may progressively decode the signal and continuously perform an error detection calculation based on a first set of information bits associated with a first error detection bit. Based on the error detection calculation, the second device may calculate an expected error detection bit corresponding to the first error detection bit. The second device may compare the first error detection bit to the expected error detection bit. Other aspects and features are also claimed and described.Type: GrantFiled: February 28, 2020Date of Patent: October 19, 2021Assignee: QUALCOMM INCORPORATEDInventors: Afshin Haftbaradaran, Ming Ta Lin, Shravan Kumar Reddy Garlapati, Alessandro Risso, Alexandre Pierrot, Harsha Narasimha Acharya, Subramanya Rao, Li Zhang
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Publication number: 20210273651Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a first device may transmit a signal to a second device including a number of error detection bits interleaved with a number of information bits. The second device may use the error detection bits to determine if the signal was received correctly, where each error detection bit may be associated with a set of information bits. The second device may progressively decode the signal and continuously perform an error detection calculation based on a first set of information bits associated with a first error detection bit. Based on the error detection calculation, the second device may calculate an expected error detection bit corresponding to the first error detection bit. The second device may compare the first error detection bit to the expected error detection bit. Other aspects and features are also claimed and described.Type: ApplicationFiled: February 28, 2020Publication date: September 2, 2021Inventors: Afshin Haftbaradaran, Ming Ta Lin, Shravan Kumar Reddy Garlapati, Alessandro Risso, Alexandre Pierrot, Harsha Narasimha Acharya, Subramanya Rao, Li Zhang
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TECHNIQUES FOR DECODING DOWNLINK CONTROL INFORMATION WITH DIFFERENT SIZES IN WIRELESS COMMUNICATIONS
Publication number: 20210028886Abstract: Aspects described herein relate to decoding downlink control information (DCI) based on multiple DCI sizes. A first hypothesis of multiple hypotheses for decoding a communication received in a control channel search space, wherein the multiple hypotheses are based on different corresponding DCI sizes can be determined. The communication received in the control channel search space can be decoded based on the first hypothesis. For each of the multiple hypotheses and based on the different corresponding DCI sizes, information bits can be extracted from the communication as decoded. For each extracting of the information bits, cyclic redundancy check (CRC) can be performed based on one of the different corresponding DCI sizes to determine whether extracting of the information bits yields DCI.Type: ApplicationFiled: July 25, 2019Publication date: January 28, 2021Inventors: Alexandre PIERROT, Hari SANKAR, Shravan Kumar Reddy GARLAPATI, Afshin HAFTBARADARAN, Alessandro RISSO, Jae Ho RYU, Ashok MANTRAVADI -
Techniques for decoding downlink control information with different sizes in wireless communications
Patent number: 10887053Abstract: Aspects described herein relate to decoding downlink control information (DCI) based on multiple DCI sizes. A first hypothesis of multiple hypotheses for decoding a communication received in a control channel search space, wherein the multiple hypotheses are based on different corresponding DCI sizes can be determined. The communication received in the control channel search space can be decoded based on the first hypothesis. For each of the multiple hypotheses and based on the different corresponding DCI sizes, information bits can be extracted from the communication as decoded. For each extracting of the information bits, cyclic redundancy check (CRC) can be performed based on one of the different corresponding DCI sizes to determine whether extracting of the information bits yields DCI.Type: GrantFiled: July 25, 2019Date of Patent: January 5, 2021Assignee: QUALCOMM IncorporatedInventors: Alexandre Pierrot, Hari Sankar, Shravan Kumar Reddy Garlapati, Afshin Haftbaradaran, Alessandro Risso, Jae Ho Ryu, Ashok Mantravadi -
Patent number: 10880878Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may identify a hash value index associated with searching for a physical downlink control channel. The hash value index may be identified based at least in part on an index of an interval of a plurality of intervals within a periodicity. The user equipment may configure, based at least in part on the hash value index, a hash function associated with determining the hash value. Numerous other aspects are provided.Type: GrantFiled: February 13, 2019Date of Patent: December 29, 2020Assignee: QUALCOMM IncorporatedInventors: Huilin Xu, Heechoon Lee, Jing Sun, Alexandre Pierrot
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Patent number: 10700829Abstract: Certain aspects of the present disclosure generally relate to techniques for combining a plurality of decision metrics of a scrambled payload in a 5G wireless communications system. For example, in some cases, combining decision metrics of a scrambled payload may generally involve receiving a first payload at a receiver that was scrambled both before and after encoding, generating a second payload at the receiver with selectively set payload mask bits, and using the selectively-set payload mask bits in the second payload to descramble the first payload.Type: GrantFiled: February 5, 2019Date of Patent: June 30, 2020Assignee: Qualcomm IncorporatedInventors: Shravan Kumar Reddy Garlapati, Afshin Haftbaradaran, Alessandro Risso, Alexandre Pierrot, Chinmay Vaze, Hari Sankar, Li Zhang
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Patent number: 10470143Abstract: A method for communication includes obtaining a timing signal from a timing synchronization reference source, computing a system frame number (SFN)—direct frame number (DFN) offset, creating a timing fingerprint using the timing signal and the SFN-DFN offset, the timing fingerprint also comprising additional timing information, entering the timing fingerprint into a database, continually updating the timing fingerprint, determining whether the timing signal remains within a threshold, if the timing signal exceeds the threshold, iterating the timing fingerprint, verifying the timing fingerprint to determine whether there is a timing inconsistency between a most recent timing fingerprint and current time, if the timing fingerprint is verified, using the SFN-DFN offset to derive current DFN timing to decode a sidelink control information (SCI) communication, and if the SCI communication is decoded, using the timing signal for communicating over a sidelink communication channel.Type: GrantFiled: March 13, 2018Date of Patent: November 5, 2019Assignee: QUALCOMM IncorporatedInventors: Michael Corley, Arvind Vardarajan Santhanam, Scott Hoover, Aamod Khandekar, Subramanya Rao, Prabhu Kandasamy, Alexandre Pierrot
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Publication number: 20190289561Abstract: A method for communication includes obtaining a timing signal from a timing synchronization reference source, computing a system frame number (SFN)-direct frame number (DFN) offset, creating a timing fingerprint using the timing signal and the SFN-DFN offset, the timing fingerprint also comprising additional timing information, entering the timing fingerprint into a database, continually updating the timing fingerprint, determining whether the timing signal remains within a threshold, if the timing signal exceeds the threshold, iterating the timing fingerprint, verifying the timing fingerprint to determine whether there is a timing inconsistency between a most recent timing fingerprint and current time, if the timing fingerprint is verified, using the SFN-DFN offset to derive current DFN timing to decode a sidelink control information (SCI) communication, and if the SCI communication is decoded, using the timing signal for communicating over a sidelink communication channel.Type: ApplicationFiled: March 13, 2018Publication date: September 19, 2019Inventors: Michael CORLEY, Arvind Vardarajan SANTHANAM, Scott HOOVER, Aamod KHANDEKAR, Subramanya RAO, Prabhu KANDASAMY, Alexandre PIERROT
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Publication number: 20190261326Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may identify a hash value index associated with searching for a physical downlink control channel. The hash value index may be identified based at least in part on an index of an interval of a plurality of intervals within a periodicity. The user equipment may configure, based at least in part on the hash value index, a hash function associated with determining the hash value. Numerous other aspects are provided.Type: ApplicationFiled: February 13, 2019Publication date: August 22, 2019Inventors: Huilin Xu, Heechoon Lee, Jing Sun, Alexandre Pierrot
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Publication number: 20190253213Abstract: Certain aspects of the present disclosure generally relate to techniques for combining a plurality of decision metrics of a scrambled payload in a 5G wireless communications system. For example, in some cases, combining decision metrics of a scrambled payload may generally involve receiving a first payload at a receiver that was scrambled both before and after encoding, generating a second payload at the receiver with selectively set payload mask bits, and using the selectively-set payload mask bits in the second payload to descramble the first payload.Type: ApplicationFiled: February 5, 2019Publication date: August 15, 2019Inventors: Shravan Kumar Reddy GARLAPATI, Afshin HAFTBARADARAN, Alessandro RISSO, Alexandre PIERROT, Chinmay VAZE, Hari SANKAR, Li ZHANG
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Publication number: 20160072531Abstract: The various embodiments include methods and apparatuses for canceling nonlinear interference during concurrent communication of multi-technology wireless communication devices. Nonlinear interference may be estimated using a support vector regression interference filter by generating one or more aggressor kernels, augmenting the one or more kernels by weight factors, and executing a regression function of the augmented components, to produce an estimated jammer signals. At an output layer, estimated jammer signals may be linearly combined to produce an estimated nonlinear interference used to cancel the nonlinear interference of a victim signal.Type: ApplicationFiled: September 9, 2015Publication date: March 10, 2016Inventors: Farrokh ABRISHAMKAR, Alexandre Pierrot, Sheng-Yuan Tu