Patents by Inventor Bhaskar Ramamurthi
Bhaskar Ramamurthi 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: 20190044600Abstract: Embodiments herein provides a method and system for beam steering in a Multiple Input Multiple Output (MIMO) system. The method comprising determining a precoder matrix based on at least one of an inter-antenna element spacing controlled based on a selection of a number of antenna elements at the transmitter and a location of at least one receiver; and steering a transmit beam using the precoder matrix towards the at least one receiver. Yet another embodiments proposes the method and system for steering the at least one optimal receive beam or optimal sub-receive beam towards the at least one transmitter based on at least one of a Channel Quality Indication (CQI), a Channel State Information (CSI), and a location.Type: ApplicationFiled: October 6, 2018Publication date: February 7, 2019Inventors: Jeniston Deviraj Klutto Milleth, Chandrasekaran Mohandoss, Sendilramkumar Devar, Thulasiram Jonna, Abhijeet Masal, Bhaskar Ramamurthi
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Patent number: 10122426Abstract: Embodiments herein provide a method for beam steering in a Multiple Input Multiple Output (MIMO) system. The method includes steering a transmit beam using a precoder matrix determined based on a plurality of parameters, wherein the transmit beam is formed using at least one of a weight of each antenna element, a number of antenna elements, and an inter-antenna element spacing.Type: GrantFiled: July 7, 2016Date of Patent: November 6, 2018Assignees: CENTRE OF EXCELLENCE IN WIRELESS TECHNOLOGY, INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Jeniston Deviraj Klutto Milleth, Chandrasekaran Mohandoss, Sendilramkumar Devar, Thulasiram Jonna, Abhijeet Masal, Bhaskar Ramamurthi
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Publication number: 20180199371Abstract: Embodiments herein provide a method and system for managing Grant-free data transmission in a radio communication network. The proposed method includes composing, by a Base Station (BS), a Select Signal (SS) for a transceiver device, where the SS is configured to control a grant-free data transmission from the transceiver device. Further, the proposed method includes transmitting, by the BS, the SS to the transceiver device. Further, the proposed method includes receiving, by a transceiver device, the SS from the BS. Further, the proposed method includes decoding, by the transceiver device, the SS and furthermore, the proposed method includes controlling, by the transceiver device, a data transmission by one of activating the grant-free data transmission from the transceiver device in response to successful decoding of the SS, and deactivating the grant-free data transmission from the transceiver device in response to unsuccessful decoding of the SS.Type: ApplicationFiled: January 6, 2018Publication date: July 12, 2018Inventors: Nithin Srinivasan, Dhivagar Baskaran, Chandrasekaran Mohandoss, Sunil Kaimalettu, Jeniston Deviraj Klutto Milleth, Bhaskar Ramamurthi
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Patent number: 9923706Abstract: The embodiments herein provide a method for In Band Full Duplex (IBFD) communication in a radio network including at least one IBFD node, at least one first non-IBFD User Equipment (UE) and at least one second non-IBFD UE. The method includes transmitting by the at least one IBFD node a first signal to the at least one first non-IBFD UE over a forward channel, and receiving by the at least one IBFD node a second signal from the at least one second non-IBFD UE over the same forward channel simultaneously, where the second signal includes at least one of a pilot signal, Channel State Information (CSI), and control information, where the forward channel is orthogonal to a reverse channel in at least one of time, frequency, space, and code.Type: GrantFiled: July 15, 2016Date of Patent: March 20, 2018Assignees: CENTRE OF EXCELLENCE IN WIRELESS TECHNOLOGY, INDIAN INSTITUTE OF TECHNOLOGY, MADRASInventors: Ankit Sharma, Jeniston Deviraj Klutto Milleth, Radha Krishna Ganti, Sunil Kaimalettu, Bhaskar Ramamurthi
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Patent number: 9843409Abstract: Embodiments herein provide a Multiple-Input Multiple-Output (MIMO) method for a communication system in general, and more particularly to an Orthogonal Frequency Division Multiplexing (OFDM) based communication system to serve more than one receivers on the same resources. The method includes selecting, by a transmitter, a plurality of precoder matrices for a plurality of receivers from a predefined codebook of precoders, where the plurality of precoder matrices is dynamically cycled within an allocated resource. Further, the method includes transmitting, by the transmitter, a symbol vector precoded with the plurality of precoder matrices over MIMO channel associated with the plurality of receivers.Type: GrantFiled: May 11, 2016Date of Patent: December 12, 2017Assignees: CENTRE OF EXCELLENCE IN WIRELESS TECHNOLOGY, INDIAN INSTITUTE OF TECHNOLOGY, MADRASInventors: Jeniston Deviraj Klutto Milleth, Chandrasekaran Mohandoss, Sendilramkumar Devar, Thulasiram Jonna, Abhijeet Masal, Bhaskar Ramamurthi
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Publication number: 20170353342Abstract: Embodiments herein provide an OFDMA method for performing OFDM based communication in a wireless communication system. The OFDMA method includes splitting a carrier bandwidth into a number of subbands and modulating resource units in each of the subbands with data symbols in a parallel manner Further, multiplexing the resource units by transforming each of the modulated resource units through a plurality of unitary transformations at a stage. Further, generating an output by performing a parallel to serial conversion of the transformed resource units. Further, the OFDMA method includes generating an OFDM signal by multiplexing an output from at least one of the previous stage to another stage by transforming the output through a unitary transformation for a defined number of times. Furthermore, the OFDMA method includes transmitting the OFDM signal over a wireless channel in the wireless network system.Type: ApplicationFiled: June 5, 2017Publication date: December 7, 2017Inventors: Dhivagar Baskaran, Jeniston Deviraj Klutto Milleth, Sunil Kaimalettu, Navinnath Palanisamy, Bhaskar Ramamurthi
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Patent number: 9722712Abstract: A communication network comprising of at least one remote base station; and a plurality of antenna ports connected to the at least one remote base station; wherein the remote base station controls the plurality of antenna ports. The remote base station is configured for defining mutually exclusive entry and exit points for the antenna ports in at least one of time; or frequency. Also, disclosed herein is a communication network comprising of at least one network controller and at least one base station, wherein the network controller is configured for assigning entry and exit points for each base station.Type: GrantFiled: May 9, 2012Date of Patent: August 1, 2017Assignee: Centre of Excellence in Wireless TechnologyInventors: Kiran Kumar Kuchi, Bhaskar Ramamurthi, Jeniston Deviraj Klutto Milleth, Sivakishore Reddy Yerrapareddy, Sunil Kaimalettu, Naga Sekhar Suruvu, Dhivagar Baskaran, Giridhar Krishnamurthi, Padmanabhan Madampu Suryasarman
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Patent number: 9661643Abstract: Cognitive interference management in Cellular wireless network with relays and micro/pico/femto cells operated in distributed scheduling mode. A cellular system may use RS to improve capacity or for coverage extension. ARS relays the signals between BS 104 and MS by using wireless links between BS-RS and RS-MS during both downlink and uplink transmissions. Embodiments herein disclose a mechanism to explicitly indicate to the MS whether the MAC management messages sent by the BS to the MS are to inform it to perform scanning for interference measurement. Also, disclosed herein is a mechanism to explicitly indicate to the BS whether the message sent by the MS is related to interference measurement.Type: GrantFiled: March 18, 2015Date of Patent: May 23, 2017Assignee: CENTRE OF EXCELLENCE IN WIRELESS TECHNOLOGYInventors: Sheetal Kalyani, Sunil Kaimalettu, Rajet Krishnan, Nadeem Akhtar, Jeniston Deviraj Klutto Milleth, Kiran Kumar Kuchi, Bhaskar Ramamurthi
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Patent number: 9641237Abstract: The embodiments herein disclose an indoor personal relay which has a wireless interface with the BS, which is effective in both cost and technology terms. The indoor personal relay, as disclosed herein is an estimate and forward relay. The relay 101 as disclosed herein does not perform any additional channel decoding/encoding on the data that it receives from the UE or BS. Embodiments disclosed herein enable the relevant UEs to have a high SINR link with the relay. This, in turn, translates to a better effective link quality between the UE and BS and higher indoor rates, which otherwise may have been not as good as a consequence of poor direct link between the UE and the BS. This relay is effectively transparent to the UE. The deployment of relays also implies minimal impact on UE IOT.Type: GrantFiled: April 30, 2015Date of Patent: May 2, 2017Assignee: Centre of Excellence in Wireless TechnologyInventors: Nadeem Akhtar, Rajet Krishnan, Sheetal Kalyani, Sunil Kaimalettu, Bhaskar Ramamurthi
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Publication number: 20170026094Abstract: Embodiments herein provide a method for beam steering in a Multiple Input Multiple Output (MIMO) system. The method includes steering a transmit beam using a precoder matrix determined based on a plurality of parameters, wherein the transmit beam is formed using at least one of a weight of each antenna element, a number of antenna elements, and an inter-antenna element spacing.Type: ApplicationFiled: July 7, 2016Publication date: January 26, 2017Inventors: Jeniston Deviraj Klutto Milleth, Chandrasekaran Mohandoss, Sendilramkumar Devar, Thulasiram Jonna, Abhijeet Masal, Bhaskar Ramamurthi
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Publication number: 20170019238Abstract: The embodiments herein provide a method for In Band Full Duplex (IBFD) communication in a radio network including at least one IBFD node, at least one first non-IBFD User Equipment (UE) and at least one second non-IBFD UE. The method includes transmitting by the at least one IBFD node a first signal to the at least one first non-IBFD UE over a forward channel, and receiving by the at least one IBFD node a second signal from the at least one second non-IBFD UE over the same forward channel simultaneously, where the second signal includes at least one of a pilot signal, Channel State Information (CSI), and control information, where the forward channel is orthogonal to a reverse channel in at least one of time, frequency, space, and code.Type: ApplicationFiled: July 15, 2016Publication date: January 19, 2017Inventors: Ankit Sharma, Jeniston Deviraj Klutto Milleth, Radha Krishna Ganti, Sunil Kaimalettu, Bhaskar Ramamurthi
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Publication number: 20160337156Abstract: Embodiments herein provide a Multiple-Input Multiple-Output (MIMO) method for a communication system in general, and more particularly to an Orthogonal Frequency Division Multiplexing (OFDM) based communication system to serve more than one receivers on the same resources. The method includes selecting, by a transmitter, a plurality of precoder matrices for a plurality of receivers from a predefined codebook of precoders, where the plurality of precoder matrices is dynamically cycled within an allocated resource. Further, the method includes transmitting, by the transmitter, a symbol vector precoded with the plurality of precoder matrices over MIMO channel associated with the plurality of receivers.Type: ApplicationFiled: May 11, 2016Publication date: November 17, 2016Inventors: Jeniston Deviraj Klutto Milleth, Chandrasekaran Mohandoss, Sendilram Kumar, Thulasiram Jonna, Abhijeet Masal, Bhaskar Ramamurthi
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Publication number: 20160173208Abstract: A communication network comprising of at least one remote base station; and a plurality of antenna ports connected to the at least one remote base station; wherein the remote base station controls the plurality of antenna ports. The remote base station is configured for defining mutually exclusive entry and exit points for the antenna ports in at least one of time; or frequency. Also, disclosed herein is a communication network comprising of at least one network controller and at least one base station, wherein the network controller is configured for assigning entry and exit points for each base station.Type: ApplicationFiled: May 9, 2012Publication date: June 16, 2016Applicants: Centre of Excellence in Wireless Technology, Indian Institute ofTechnology Madras, Indian Institute of Technology HyderabadInventors: Kiran Kumar Kuchi, Bhaskar Ramamurthi, Jeniston Deviraj Klutto Milleth, Sivakishore Reddy Yerrapareddy, Sunil Kaimalettu, Naga Sekhar Suruvu, Dhivagar Baskaran, Giridhar Krishnamurthi, Padmanabhan Madampu Suryasarman
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Patent number: 9338038Abstract: Embodiments herein disclose an Interference Cancelling Block Modulation (ICBM), a new open-loop precoding scheme where each transmitter is assigned with a predetermined precoder which facilitates interference cancellation at the receivers. Only a finite set of precoders will be used, and they will be assigned to each transmitter in a pre-determined manner. Usually, interfering transmitters located adjacent to each other will have different precoders, and the same precoder can be reused by non-adjacent transmitters. The precoders are represented by N×K matrices and they expand the symbols in time and/or frequency by a factor of N/K while providing precoded sequences with low cross-correlation properties.Type: GrantFiled: April 11, 2011Date of Patent: May 10, 2016Inventors: Krishnamurthy Giridhar, Vinoth Nagarajan, Ayyar Arun Balavenkatasubramanian, Bhaskar Ramamurthi, Devar Sendilramkumar S, Ganesh V., Kuchi Kiran Kumar
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Patent number: 9312978Abstract: Embodiments disclosed herein reduce interference at pilot symbols and also enable good interference measurements by using a combination pilot tones and null tones along with null tones. In this type of system, the receivers estimate the channel state information without any strong interference from the neighboring transmitters, and at the same time it can also measure either the individual interference channel states or the interference covariances from the silent periods. It uses these measurements thus obtained to calculate the post processing SINR, and then compute and report the wideband and subband CQIs to the transmitter. The groups of transmitters are reused in geographically separated region using a frequency reuse structure. In a preferred implementation, pilot signal is precoded using a multi-antenna precoder. The precoder may be same for pilot and data.Type: GrantFiled: April 12, 2015Date of Patent: April 12, 2016Assignee: Centre of Excellence in Wireless TechnologyInventors: Kiran Kumar Kuchi, Jeniston Deviraj Klutto Milleth, Vinod Ramaswamy, Baskaran Dhivagar, Dileep Manisseri Kalathil, Krishnamurthi Giridhar, Bhaskar Ramamurthi, Padmanabhan Madampu Suryasarman, Geordie George, Prasanth Karunakaran, Yerrapareddy Sivakishore Reddy
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Patent number: 9225575Abstract: Precoding for multiple transmission streams in multiple antenna systems. Disclosed herein is a general method that transmits signal from multiple antennas using a one/two dimensional precoder. This precoder is fixed in a given resource block (RB) or slot, which is composed of P subcarriers and Q OFDM symbols (where the values for P and Q are greater than or equal to 1). The precoder in each resource block may take same or different values, which span the two dimensional time-frequency grid. The precoder is chosen as a function of either logical frequency index or physical frequency index of the RB.Type: GrantFiled: June 9, 2015Date of Patent: December 29, 2015Assignee: Center of Excellence in Wireless TechnologyInventors: Kiran Kumar Kuchi, Deviraj Klutto Milleth Jeniston, Vinod Ramaswamy, Baskaran Dhivagar, Krishnamurthi Giridhar, Bhaskar Ramamurthi, Dileep Manisseri Kalathil, Padmanabhan Madampu Suryasarman
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Publication number: 20150271003Abstract: Precoding for multiple transmission streams in multiple antenna systems. Disclosed herein is a general method that transmits signal from multiple antennas using a one/two dimensional precoder. This precoder is fixed in a given resource block (RB) or slot, which is composed of P subcarriers and Q OFDM symbols (where the values for P and Q are greater than or equal to 1). The precoder in each resource block may take same or different values, which span the two dimensional time-frequency grid. The precoder is chosen as a function of either logical frequency index or physical frequency index of the RB.Type: ApplicationFiled: June 9, 2015Publication date: September 24, 2015Inventors: Kiran Kumar Kuchi, Deviraj Klutto Milleth Jeniston, Vinod Ramaswamy, Baskaran Dhivagar, Krishnamurthi Giridhar, Bhaskar Ramamurthi, Dileep Manisseri Kalathil, Padmanabhan Madampu Suryasarman
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Publication number: 20150236777Abstract: The embodiments herein disclose an indoor personal relay which has a wireless interface with the BS, which is effective in both cost and technology terms. The indoor personal relay, as disclosed herein is an estimate and forward relay. The relay 101 as disclosed herein does not perform any additional channel decoding/encoding on the data that it receives from the UE or BS. Embodiments disclosed herein enable the relevant UEs to have a high SINR link with the relay. This, in turn, translates to a better effective link quality between the UE and BS and higher indoor rates, which otherwise may have been not as good as a consequence of poor direct link between the UE and the BS. This relay is effectively transparent to the UE. The deployment of relays also implies minimal impact on UE IOT.Type: ApplicationFiled: April 30, 2015Publication date: August 20, 2015Applicant: Centre of Excellence in Wireless TechnologyInventors: Nadeem Akhtar, Rajet Krishnan, Sheetal Kalyani, Sunil Kaimalettu, Bhaskar Ramamurthi
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Publication number: 20150215063Abstract: Embodiments disclosed herein reduce interference at pilot symbols and also enable good interference measurements by using a combination pilot tones and null tones along with null tones. In this type of system, the receivers estimate the channel state information without any strong interference from the neighboring transmitters, and at the same time it can also measure either the individual interference channel states or the interference covariances from the silent periods. It uses these measurements thus obtained to calculate the post processing SINR, and then compute and report the wideband and subband CQIs to the transmitter. The groups of transmitters are reused in geographically separated region using a frequency reuse structure. In a preferred implementation, pilot signal is precoded using a multi-antenna precoder. The precoder may be same for pilot and data.Type: ApplicationFiled: April 12, 2015Publication date: July 30, 2015Applicant: Centre of Excellence in Wireless TechnologyInventors: Kiran Kumar Kuchi, Jeniston Deviraj Klutto Milleth, Vinod Ramaswamy, Baskaran Dhivagar, Dileep Manisseri Kalathil, Krishnamurthi Giridhar, Bhaskar Ramamurthi, Padmanabhan Madampu Suryasarman, Geordie George, Prasanth Karunakaran, Yerrapareddy Sivakishore Reddy
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Patent number: 9083399Abstract: Precoding for multiple transmission streams in multiple antenna systems. Disclosed herein is a general method that transmits signal from multiple antennas using a one/two dimensional precoder. This precoder is fixed in a given resource block (RB) or slot, which is composed of P subcarriers and Q OFDM symbols (where the values for P and Q are greater than or equal to 1). The precoder in each resource block may take same or different values, which span the two dimensional time-frequency grid. The precoder is chosen as a function of either logical frequency index or physical frequency index of the RB.Type: GrantFiled: June 18, 2009Date of Patent: July 14, 2015Assignee: Centre of Excellence in Wireless TechnologyInventors: Kiran Kumar Kuchi, Deviraj Klutto Milleth Jeniston, Vinod Ramaswamy, Baskaran Dhivagar, Krishnamurthi Giridhar, Bhaskar Ramamurthi, Dileep Manisseri Kalathil, Padmanabhan Madampu Suryasarman