Patents by Inventor Aditya Chopra
Aditya Chopra 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: 11303347Abstract: Aspects of the subject disclosure may include, for example, receiving an RF signal having a carrier wave component operating at a carrier frequency within a millimeter wave spectrum and an information component based on a phase modulation of the carrier wave component. The received RF signal is divided into first and second signal portions that remain in phase with respect to each other. The first signal portion is delayed by one symbol period of the phase modulation and combined with the second signal portion to obtain a combined output signal. An in-phase portion of the combined output signal is detected via a non-linear energy detector, wherein an amplitude of the first detected signal corresponds to the in-phase portion of the received RF signal. The first combined output signal includes information of the information component. Other embodiments are disclosed.Type: GrantFiled: November 24, 2020Date of Patent: April 12, 2022Assignees: AT&T INTELLECTUAL PROPERTY I, L.P., UNIVERSITY OF NOTRE DAME DU LACInventors: Ralf Bendlin, Aditya Chopra, Bertrand Martyn Hochwald, Nicholas Joseph Estes, Jonathan David Chisum, Kang Gao
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Patent number: 11296804Abstract: An example device may include at least three phased array antennas controllable to provide respective receive beams steerable in azimuth and elevation, where faces of the phased array antennas are arranged to provide a receive beam coverage 360 degrees in azimuth, and at least three radio frequency front ends to receive channel sounding waveforms from a fifth generation base station of a cellular network via the respective receive beams and to generate baseband signals from the channel sounding waveforms. The device may include a processing system including at least one processor in communication with the radio frequency front ends to steer the respective receive beams via instructions to the radio frequency front ends, receive the baseband signals from the radio frequency front ends, determine a plurality of measurements of at least one wireless channel parameter based upon the baseband signals, and record locations and spatial orientation information for the measurements.Type: GrantFiled: September 16, 2019Date of Patent: April 5, 2022Assignee: AT&T Intellectual Property I, L.P.Inventors: Aditya Chopra, Arunabha Ghosh, Saeed Ghassemzadeh, Salam Akoum, Xiaoyi Wang
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Patent number: 11296742Abstract: Aspects of the subject disclosure may include, for example, receiving, by a first radio module at a first location, a wireless MIMO signal, to obtain a first received RF signal. The wireless MIMO signal includes information originating at a remote MIMO transmitter and conveyed via a wireless channel. An envelope of the first received RF signal is detected by the first radio module without requiring a local oscillator, to obtain a first baseband signal. The first baseband signal may be filtered and/or amplified, after which it is compared to a reference value to obtain a first digital signal that is provided to a digital processor. The digital processor also obtains a second digital signal from a second radio module receiving the wireless MIMO signal at a second location and determines an estimate of the information originating at the remote MIMO transmitter according to the first and second digital signals. Other embodiments are disclosed.Type: GrantFiled: August 7, 2020Date of Patent: April 5, 2022Assignees: AT&T Intellectual Property I, L.P., University of Notre Dame du LacInventors: Ralf Bendlin, Jonathan David Chisum, Nicholas Joseph Estes, Bertrand Martyn Hochwald, Aditya Chopra
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Publication number: 20220060995Abstract: Various embodiments disclosed herein provide for a power control system in a multi-hop integrated access and backhaul network. In the multi-hop integrated access and backhaul network, a donor node can communicate with user equipment devices and relay nodes that have varying power levels; and to avoid receiving uplink transmissions with varying power levels which can impact automatic gain control systems and lower overall throughput, the power control system can manage the power levels of the relay node in order to reduce the difference in power levels. The power control system can schedule relay node devices to transmit uplink transmissions alongside user equipment devices that have a high signal strength; schedule relay nodes and user equipment devices to separate symbols within a time slot; and/or perform closed loop power control management at the relay node to reduce the power level for an uplink transmission.Type: ApplicationFiled: November 3, 2021Publication date: February 24, 2022Inventors: Aditya Chopra, Arunabha Ghosh, Thomas Novlan, Andrew Thornburg, Xiaoyi Wang, Ralf Bendlin
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Patent number: 11240843Abstract: The disclosed subject matter is directed towards a clear channel assessment procedure based on a common preamble, such as for use with 3GPP and IEEE 802.11 technologies, or any other radio technology, including for use in the 6 GHz band. Detection of the common preamble is based on detecting known sequences in signal part, which can be detected without decoding the preamble's payload (channel) part to determine an ongoing transmission's duration. If an ongoing transmission is detected, subsequent energy detection monitoring is performed to determine when transmission ends, which can use a different energy detection threshold from what is used in the initial clear channel assessment's energy detection. The technology facilitates the usage of different sampling rates by different radio technologies that work concurrently in the same unlicensed band, by correlating a received preamble with a stored preamble that accounts for deterministic distortions arising from the different sampling rates.Type: GrantFiled: July 2, 2019Date of Patent: February 1, 2022Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Ralf Bendlin, Arunabha Ghosh, Aditya Chopra
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Patent number: 11239877Abstract: Aspects of the subject disclosure may include, for example, generating multiple digital reference pulses synchronously to a master oscillator, selectively switching the multiple digital reference pulses, and providing the switched pulses to multiple radio modules operating within a millimeter wave spectrum. For each radio module, counting cycles of an adjustable LO output signal occurring between consecutive pulses of the switched digital reference pulses, determining a difference between the count value and a reference value, and adjusting the adjustable LO according to the difference. A resulting corrected LO signal is synchronized to the master oscillator. Other embodiments are disclosed.Type: GrantFiled: November 24, 2020Date of Patent: February 1, 2022Assignees: AT&T INTELLECTUAL PROPERTY I, L.P., UNIVERSITY OF NOTRE DAME DU LACInventors: Aditya Chopra, Ralf Bendlin, Nicholas Joseph Estes, Kang Gao, Bertrand Martyn Hochwald, Jonathan David Chisum
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Patent number: 11228381Abstract: An example method may include a processing system of a channel sounding receiver having a processor receiving from a base station, at a location, a channel sounding waveform via a plurality of carriers, sampling the channel sounding waveform via the plurality of carriers to generate a plurality of per-carrier time domain sample sets, and processing the plurality of per-carrier time domain sample sets via a plurality of discrete Fourier transform modules to provide a plurality of per-carrier frequency domain sample sets. The method may further include the processing system aligning the plurality of per-carrier frequency domain sample sets in gain and phase to provide a combined frequency domain sample set and measuring a channel property at the location based upon the combined frequency domain sample set.Type: GrantFiled: January 27, 2020Date of Patent: January 18, 2022Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Aditya Chopra, Saeed Ghassemzadeh, Arunabha Ghosh, Ralf Bendlin, Salam Akoum, SaiRamesh Nammi, Thomas Novlan, Xiaoyi Wang
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Patent number: 11197246Abstract: Various embodiments disclosed herein provide for power control system in a multi-hop integrated access and backhaul network. In a multi-hop integrated access and backhaul network a donor node can communicate with user equipment devices and relay nodes that have varying power levels, and to avoid receiving uplink transmissions with varying power levels which can impact automatic gain control systems and lower overall throughput, the power control system disclosed herein can manage the power levels of the relay node in order to reduce the difference in power levels. In one embodiment, the power control system can schedule relay node devices to transmit uplink transmissions alongside UE devices that have a high signal strength. In another embodiment, the power control system can schedule relay nodes and UE devices to separate symbols within a time slot.Type: GrantFiled: August 2, 2018Date of Patent: December 7, 2021Assignee: AT&T Intellectual Property I, L.P.Inventors: Aditya Chopra, Arunabha Ghosh, Thomas Novlan, Andrew Thornburg, Xiaoyi Wang, Ralf Bendlin
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Publication number: 20210367812Abstract: In one example, a processing system of a mobile channel sounding transmitter including at least one processor may establish a wireless side link between the mobile channel sounding transmitter and a channel sounding receiver, transmit, to the channel sounding receiver, a wireless synchronization signal via the wireless side link, and transmit at least one channel sounding waveform in accordance with the wireless synchronization signal. In another example, a processing system of a channel sounding receiver including at least one processor may establish a wireless side link between a mobile channel sounding transmitter and the channel sounding receiver, obtain, from the mobile channel sounding transmitter, a wireless synchronization signal via the wireless side link, and obtain, from the mobile channel sounding transmitter, at least one channel sounding waveform in accordance with the wireless synchronization signal.Type: ApplicationFiled: August 2, 2021Publication date: November 25, 2021Inventors: Aditya Chopra, Saeed Ghassemzadeh, Arunabha Ghosh, Andrew Thornburg
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Publication number: 20210321371Abstract: The technologies described herein are generally directed toward communicating determined contention levels of resource pools to UEs enabling the UEs to select from available resource pools. According to an embodiment, a system can comprise a processor and a memory that can store executable instructions that, when executed by the processor, facilitate performance of operations. The operations can include assigning determined contention levels to respective ones of a group of resource pools. The operations can further include communicating, to a user equipment device, the determined contention levels, enabling the user equipment device to select a resource pool of the group of resource pools based on the determined contention levels.Type: ApplicationFiled: June 25, 2021Publication date: October 14, 2021Inventors: Xiaoyi Wang, Salam Akoum, Aditya Chopra, Andrew Thornburg, Milap Majmundar, Thomas Novlan, Ralf Bendlin
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Patent number: 11147069Abstract: Aspects of the subject disclosure may include, for example, a base station that includes a phased array antenna system and a MIMO antenna system. The MIMO antenna system may receive sounding signals sent by user equipment (UE) and determine angular location information for each UE. The angular location information may be used by the phased array antenna system to create antenna beams. The angular location information may also be used to schedule communications with multiple UEs in common beams. Other embodiments are disclosed.Type: GrantFiled: March 5, 2021Date of Patent: October 12, 2021Assignee: AT&T Intellectual Property I, L.P.Inventors: Aditya Chopra, Andrew Thornburg, Saeed Ghassemzadeh
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Publication number: 20210313688Abstract: A wireless channel sounding system may include a wireless channel sounding transmitter having at least two radio frequency front ends coupled to at least two phased array antennas to generate at least two radio frequency channel sounding waveforms from at least two baseband signals, the at least two phased array antennas each controllable to provide a respective transmit beam that is steerable in azimuth and elevation, and that comprises one of the at least two radio frequency channel sounding waveforms, where faces of the at least two phased array antennas are arranged to provide a transmit beam coverage over 360 degrees in azimuth, and a first processing system including at least one processor, in communication with the at least two radio frequency front ends, to provide the at least two baseband signals and steer the respective transmit beams via instructions to the at least two radio frequency front ends.Type: ApplicationFiled: June 21, 2021Publication date: October 7, 2021Inventors: Saeed Ghassemzadeh, Aditya Chopra, Arunabha Ghosh, Andrew Thornburg
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Patent number: 11140577Abstract: Facilitating energy-efficient wireless communications for advanced networks (e.g., 4G, 5G, and beyond) with low-resolution digital-to-analog converters is provided herein. Operations of a system can comprise determining first values. Respective values of the first values can be digital samples of transmission and reception chains determined based on symbols transformed from bits. The operations can also comprise facilitating a quantization of the first values resulting in second values. Facilitating the quantization can be based on a cost function associated with processing the first values. Further, the operations can comprise outputting the second values as a continuous time signal over antennas of a base station device. The second values can comprise fewer values than the first values.Type: GrantFiled: October 1, 2020Date of Patent: October 5, 2021Assignee: AT&T Intellectual Property I, L.P.Inventors: Ralf Bendlin, Arunabha Ghosh, Aditya Chopra
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Publication number: 20210297973Abstract: The described technology is generally directed towards over the air synchronization of network nodes. In general, the techniques disclosed herein can be implemented by a first base station node device and a second base station node device. A wireless backhaul connection between the base station node devices allows the first base station node device to connect to a core network via the second base station node device. The techniques disclosed herein can be implemented as a protocol including communications back and forth between the base station node devices, which enables measurement of communication delays such as propagation delays and processing delays. The base station node devices can then use the measured communication delays to better synchronize clocks used to time radio frequency transmissions.Type: ApplicationFiled: June 10, 2021Publication date: September 23, 2021Inventors: Ralf Bendlin, Aditya Chopra, Thomas Novlan, Milap Majmundar
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Patent number: 11121896Abstract: Aspects of the subject disclosure may include, for example, receiving a radio frequency (RF) signal having a carrier wave component that operates at a carrier frequency within a millimeter wave spectrum. The RF signal also includes an information component based on a phase shift keying (PSK) modulation of the carrier wave component. A local oscillator (LO) signal is obtained, which includes an LO frequency that approximates the carrier frequency. The received RF signal and the LO signal are combined without using signal multiplication to obtain a first combined output signal. The first combined output signal being detected via a non-linear energy detector to obtain a first detected signal. The first output signal includes information of the information component. Other embodiments are disclosed.Type: GrantFiled: November 24, 2020Date of Patent: September 14, 2021Assignees: AT&T Intellectual Property I, L.P., University of Notre Dame du LacInventors: Ralf Bendlin, Aditya Chopra, Bertrand Martyn Hochwald, Nicholas Joseph Estes, Jonathan David Chisum, Kang Gao
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Publication number: 20210273656Abstract: Aspects of the subject disclosure may include, for example, obtaining a received channel-encoded data block having information bits, a transmitted error-check value, and redundant code bits. The redundant code bits correspond to a channel code applied to the received channel-encoded data block prior to transmission via a communication channel. A channel code type is identified and responsive to it being systematic, the information bits and the transmitted error-check value are obtained without decoding according to the channel code. The received channel-encoded data block is checked according to the transmitted error-check value to obtain a result. Responsive to the result not indicating an error, extracting the information bits without decoding the received channel-encoded data block according to the channel code. Responsive to the result indicating an error, decoding the received channel-encoded data block according to the channel code to obtain decoded information bits. Other embodiments are disclosed.Type: ApplicationFiled: April 27, 2021Publication date: September 2, 2021Applicant: AT&T Intellectual Property I, L.P.Inventors: Sairamesh Nammi, Arunabha Ghosh, Aditya Chopra, Saeed Ghassemzadeh
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Patent number: 11082265Abstract: In one example, a processing system of a mobile channel sounding transmitter including at least one processor may establish a wireless side link between the mobile channel sounding transmitter and a channel sounding receiver, transmit, to the channel sounding receiver, a wireless synchronization signal via the wireless side link, and transmit at least one channel sounding waveform in accordance with the wireless synchronization signal. In another example, a processing system of a channel sounding receiver including at least one processor may establish a wireless side link between a mobile channel sounding transmitter and the channel sounding receiver, obtain, from the mobile channel sounding transmitter, a wireless synchronization signal via the wireless side link, and obtain, from the mobile channel sounding transmitter, at least one channel sounding waveform in accordance with the wireless synchronization signal.Type: GrantFiled: July 31, 2019Date of Patent: August 3, 2021Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Aditya Chopra, Saeed Ghassemzadeh, Arunabha Ghosh, Andrew Thornburg
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Patent number: 11071091Abstract: The technologies described herein are generally directed toward communicating determined contention levels of resource pools to user equipments enabling the user equipments to select from available resource pools. According to an embodiment, a system can comprise a processor and a memory that can store executable instructions that, when executed by the processor, facilitate performance of operations. The operations can include assigning determined contention levels to respective ones of a group of resource pools. The operations can further include communicating, to a user equipment device, the determined contention levels, enabling the user equipment device to select a resource pool of the group of resource pools based on the determined contention levels.Type: GrantFiled: January 10, 2019Date of Patent: July 20, 2021Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Xiaoyi Wang, Salam Akoum, Aditya Chopra, Andrew Thornburg, Milap Majmundar, Thomas Novlan, Ralf Bendlin
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Patent number: 11064449Abstract: The described technology is generally directed towards over the air synchronization of network nodes. In general, the techniques disclosed herein can be implemented by a first base station node device and a second base station node device. A wireless backhaul connection between the base station node devices allows the first base station node device to connect to a core network via the second base station node device. The techniques disclosed herein can be implemented as a protocol including communications back and forth between the base station node devices, which enables measurement of communication delays such as propagation delays and processing delays. The base station node devices can then use the measured communication delays to better synchronize clocks used to time radio frequency transmissions.Type: GrantFiled: August 16, 2019Date of Patent: July 13, 2021Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Ralf Bendlin, Aditya Chopra, Thomas Novlan, Milap Majmundar
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Patent number: 11043742Abstract: A wireless channel sounding system may include a wireless channel sounding transmitter having at least two radio frequency front ends coupled to at least two phased array antennas to generate at least two radio frequency channel sounding waveforms from at least two baseband signals, the at least two phased array antennas each controllable to provide a respective transmit beam that is steerable in azimuth and elevation, and that comprises one of the at least two radio frequency channel sounding waveforms, where faces of the at least two phased array antennas are arranged to provide a transmit beam coverage over 360 degrees in azimuth, and a first processing system including at least one processor, in communication with the at least two radio frequency front ends, to provide the at least two baseband signals and steer the respective transmit beams via instructions to the at least two radio frequency front ends.Type: GrantFiled: July 31, 2019Date of Patent: June 22, 2021Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Saeed Ghassemzadeh, Aditya Chopra, Arunabha Ghosh, Andrew Thornburg