Patents by Inventor Supratik Bhattacharjee

Supratik Bhattacharjee 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: 8781437
    Abstract: This disclosure provides systems, methods and apparatus for providing transmission power limit back-off for Specific Absorption Rate (SAR) compliance. In one aspect, a method implemented in a wireless communication apparatus is provided. The method includes receiving an indication of at least one operating mode indicative of a proximity and an orientation of at least one transmitting antenna of the wireless communication apparatus. The method further includes determining a power transmission characteristic based on the determined operating mode and at least one of a radio access technology type, a band-class, a transmission configuration, an uplink channel, a traffic state, and a radio access technology transmission state used by the wireless communication apparatus, or any combination thereof.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: July 15, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Francis Ming-Meng Ngai, John A. Forrester, Anshul Pandey, Supratik Bhattacharjee, Rema Vaidyanathan, Brian Michael George, Zhu Ji
  • Patent number: 8756477
    Abstract: Methods, apparatus and articles of manufacture are disclosed that provide for early termination based on transport block fail for acknowledgement bundling in time division duplex. In one embodiment, a method for operating a communication device is provided. In this embodiment, the communication device decodes a downlink subframe that is part of a bundle of subframes. If it detects a CRC failure in the subframe, it inhibits decoding of at least one other subframe in the bundle if present and reports the failure to the sending node. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. Therefore, it is to be understood that it should not be used to interpret or limit the scope or the meaning of the claims.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: June 17, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Raghu N Challa, Thomas B Wilborn, Supratik Bhattacharjee
  • Publication number: 20140155010
    Abstract: Certain aspects of the present disclosure provide ordering techniques for a Successive Interference Cancellation (SIC) receiver which may be used to robustly choose a correct stream for first decode under varying data rates, SNR and mobile propagation conditions in Multiple Input Multiple Output (MIMO) systems. The SIC ordering techniques discussed in the disclosure include SNR and/or Rate based information theoretic approach. For example, the SIC receiver may evaluate an SNR based or RATE-based information theoretic metric for the MIMO streams and choose one stream with a higher value of the metric for decoding first. A speculative single code block based approach is may also be used for selecting a stream for first decode, by leveraging the presence of per code block Cyclic Redundancy Check (CRC) and the lack of time diversity in LTE systems.
    Type: Application
    Filed: December 5, 2012
    Publication date: June 5, 2014
    Applicant: QUALCOMM INCORPORATED
    Inventors: Supratik Bhattacharjee, Brian Clarke Banister
  • Patent number: 8699361
    Abstract: A method for handling out-of-synchronization (SYNC) includes generating a plurality of combination sets of transport channels utilized by a communication device. The method also includes selecting, based on a window-based parameter, a highest-ranking combination set of transport channels out of the plurality of combination sets of transport channels. The highest-ranking combination set of transport channels excludes one or more out-of-SYNC transport channels. The method further comprises providing, to a window-based data processing unit, data packets from transport channels in the highest-ranking combination set of transport channels, without providing data packets from the one or more out-of-SYNC transport channels to the window-based data processing unit. Apparatus and machine-readable media for out-of-SYNC avoidance and/or detection are also provided.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: April 15, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Samson Jim, Sanjay Kenchareddy, Supratik Bhattacharjee, Vivek Ramachandran, Tim T. Liou
  • Patent number: 8670734
    Abstract: Methods and apparatus for determining a reference sequence and timing based on normalized correlations are described. One example method generally includes receiving, at a first antenna of an apparatus, a first signal comprising a reference sequence; receiving, at a second antenna of the apparatus, a second signal comprising the same reference sequence; sampling the first and second signals to form first and second signal sequences; correlating the first and second signal sequences with each of one or more candidate sequences for the reference sequence using normalization; and determining the reference sequence and timing for the first and second signals based on the normalized correlations.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: March 11, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Shivratna Giri Srinivasan, Raghu Narayan Challa, Supratik Bhattacharjee, Brian Clarke Banister
  • Publication number: 20140064108
    Abstract: Apparatus and method for wireless communication in a wireless communication network that includes receiving a signal from a network and measuring a minimum bandwidth of the received signal for a measurement region by shifting the measurement region of the signal based on a frequency offset and rotating the measurement region of the signal.
    Type: Application
    Filed: August 30, 2012
    Publication date: March 6, 2014
    Applicant: QUALCOMM Incorporated
    Inventors: Supratik Bhattacharjee, Brian C. Banister
  • Patent number: 8660097
    Abstract: Methods and apparatus for service continuity in a communication network. A method includes receiving a service in a first network coverage area, detecting entry into a second coverage area, acquiring control signaling information of the second coverage area in response to entering into the second coverage area, establishing traffic channels in the second coverage area while the service is received from the first coverage area, and switching to receive the service on the traffic channels in the second coverage area so that service disruption is minimized. Another method includes receiving a service in a first network coverage area, acquiring control signaling information associated with other coverage areas while in the first coverage area, detecting entry into a second coverage area, establishing traffic channels in the second coverage area, and switching to receive the service on the traffic channels in the second coverage area so that service disruption is minimized.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: February 25, 2014
    Assignee: Qualcomm Incorporated
    Inventors: Sanjay Kenchareddy, Vivek Venkatesh Ramachandran, Daniel Amerga, Supratik Bhattacharjee
  • Publication number: 20140022909
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus determines whether a channel quality indicator (CQI) is to be reported during any one of x subframes immediately after a start of a next on-duration, an on-duration being a duration over which a downlink control channel is monitored every discontinuous reception (DRX) cycle, and x being a number of subframes used to generate a CQI report, schedules a wake-up time for reporting the CQI when the CQI is to be reported during any one of the x subframes immediately after the start of the next on-duration, and reports the CQI based on a reference subframe. The CQI may be based on a last subframe of a previous DRX cycle active time, and reported at a first subframe of the next on-duration.
    Type: Application
    Filed: March 7, 2013
    Publication date: January 23, 2014
    Applicant: QUALCOMM Incorporated
    Inventors: Hisham A. MAHMOUD, Supratik BHATTACHARJEE, Brian Clarke BANISTER
  • Publication number: 20130272218
    Abstract: Certain aspects of the present disclosure relate to methods and apparatus for Channel Quality Indicator (CQI) reporting after resumption of Long Term Evolution (LTE) after a temporary suspension. In certain aspects, in order to minimize performance penalty to LTE on resumption after an LTE tune away for example to service a different Radio Access Technology, information available from before the LTE tune away may be used in addition to one or more additional parameters for determining how to perform LTE CQI calculation/update after tuning back to LTE. In certain aspects, a decision regarding whether a User Equipment (UE) reports a CQI based on channel conditions before the LTE tune away or reports a CQI based on channel conditions after tuning back to LTE may be based on a value of the Doppler estimate, a time duration of the LTE tune away, or a combination thereof.
    Type: Application
    Filed: March 6, 2013
    Publication date: October 17, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Shengshan Cui, Brandon Allen Burdge, Shivratna Giri Srinivasan, Brian Clarke Banister, Supratik Bhattacharjee, Raghu Narayan Challa
  • Publication number: 20130267221
    Abstract: Techniques for making measurements of cells in a wireless network are disclosed. In an aspect, cells to be measured are arranged into groups with different priorities. Groups with higher priority include stronger cells, which are measured more frequently and/or with more filtering to improve measurement accuracy. In one design, a user entity determines a plurality of groups of cells to make measurements. Each group includes at least one cell, and the plurality of groups have different priorities. The user entity determines a measurement interval for each of the plurality of groups of cells, with higher priority groups having shorter measurement intervals. The user entity schedules each cell in each group for measurement at least once (e.g., once) within the measurement interval for that group. The user entity makes measurements for the plurality of groups of cells based on the measurement interval for each group.
    Type: Application
    Filed: April 9, 2012
    Publication date: October 10, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Shivratna Giri Srinivasan, Supratik Bhattacharjee, Brian Clarke Banister, Udayan Murli Bhawnani
  • Patent number: 8554251
    Abstract: An apparatus and method for processing signals are disclosed. The apparatus may include a transceiver configured to receive a first paging signal during a first cycle, a memory, and a processor configured to store the received first paging signal in the memory, to switch the transceiver to an off state after the first paging signal is stored in the memory, and to process the stored first paging signal while the transceiver is in the off state.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: October 8, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Supratik Bhattacharjee, Joseph C. Chan, Brian C. Banister, Shivratna G. Srinivasan
  • Publication number: 20130155883
    Abstract: Techniques for performing a frequency scan to detect wireless systems operating on frequency channels with variable bandwidths are disclosed. In one aspect, a user equipment (UE) performs a frequency scan for a plurality of frequency channels and measures the received power of each frequency channel based on a center frequency and a bandwidth of the frequency channel. The UE identifies candidate frequency channels for acquisition based on the results of the frequency scan. In another aspect, a frequency scan of a band is performed by partitioning the band into multiple segments, measuring received powers of subcarriers or raster frequencies within each segment, and concatenating received powers of subcarriers or raster frequencies for all segments. A frequency scan is then performed based on the concatenated results for the multiple segments.
    Type: Application
    Filed: September 11, 2012
    Publication date: June 20, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Supratik Bhattacharjee, Shivratna G. Srinivasan, Brian C. Banister, Hisham Mahmoud
  • Patent number: 8456996
    Abstract: A method for wireless communication is disclosed that includes receiving a plurality of sets of transport blocks, each set of transport blocks associated with a radio link from a plurality of radio links in soft combining; performing a filtering operation of block errors in the plurality of radio links; and removing one or more radio links from the plurality of radio links in soft combining based on the filtering operation. An apparatus and processing system for performing the method are also disclosed.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: June 4, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Supratik Bhattacharjee, Rajiv Nambiar
  • Patent number: 8451964
    Abstract: Certain aspects of the present disclosure propose an interference cancellation method based on the sub-blocks inside a block. For example, in the long term evolution (LTE) standard, the sub-blocks may be code blocks and the blocks may be transport block.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: May 28, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Thomas B. Willborn, Supratik Bhattacharjee
  • Publication number: 20130070728
    Abstract: Certain aspects of the present disclosure relate to techniques for improving a circuit-switched fallback (CSFB) user experience. In aspects, methods and systems for autonomously returning a user equipment (UE) from a 2G (2nd generation)/3G (3rd generation) network to an LTE (Long Term Evolution) network are provided. The UE may store a flag to note whether a current circuit switched (CS) call in the 2G/3G network is a result of a CSFB. The UE, in response to detecting a termination of the current CS call in the 2G/3G network and determining that the terminated call was a CSFB call (e.g., from the status of the flag), may trigger a mobility mechanism to autonomously return the UE to the LTE network.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 21, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Bhupesh Manoharlal Umatt, Krishna Rao Mandadapu, Srinivasa Prasad Vangaru, Sathish Krishnamoorthy, Supratik Bhattacharjee, Joe Thomas, Thomas Klingenbrunn, Shyamal Ramachandran
  • Publication number: 20120270592
    Abstract: This disclosure provides systems, methods and apparatus for providing transmission power limit back-off for Specific Absorption Rate (SAR) compliance. In one aspect, a method implemented in a wireless communication apparatus is provided. The method includes receiving an indication of at least one operating mode indicative of a proximity and an orientation of at least one transmitting antenna of the wireless communication apparatus. The method further includes selecting from a plurality of transformations associated with the at least one operating mode. The method further includes applying a selected transformation to adjust a relationship between a power transmission level of a first transmitter and a power transmission level of a second transmitter. The method further includes determining a target power transmission level of the first transmitter based on the adjusted relationship and a current power transmission level of the second transmitter.
    Type: Application
    Filed: March 2, 2012
    Publication date: October 25, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Francis Ming-Meng Ngai, John A. Forrester, Anshul Pandey, Supratik Bhattacharjee, Rema Vaidyanathan, Brian Michael George, Zhu Ji
  • Publication number: 20120270519
    Abstract: This disclosure provides systems, methods and apparatus for providing transmission power limit back-off for Specific Absorption Rate (SAR) compliance. In one aspect, a method implemented in a wireless communication apparatus is provided. The method includes receiving an indication of at least one operating mode indicative of a proximity and an orientation of at least one transmitting antenna of the wireless communication apparatus. The method further includes determining a power transmission characteristic based on the determined operating mode and at least one of a radio access technology type, a band-class, a transmission configuration, an uplink channel, a traffic state, and a radio access technology transmission state used by the wireless communication apparatus, or any combination thereof.
    Type: Application
    Filed: March 2, 2012
    Publication date: October 25, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Francis Ming-Meng Ngai, John A. Forrester, Anshul Pandey, Supratik Bhattacharjee, Rema Vaidyanathan, Brian Michael George, Zhu Ji
  • Publication number: 20120195249
    Abstract: A method includes determining, at a receiving station, a modified capability for maintaining reception of a service while supporting a broadcast service. The modified capability is a modification of a capability associated with the service. The method further includes communicating an indication of the modified capability to a transmitting station.
    Type: Application
    Filed: January 31, 2012
    Publication date: August 2, 2012
    Inventors: Supratik Bhattacharjee, Nathan E. Tenny, Sanjay Kenchareddy
  • Patent number: 8144662
    Abstract: An apparatus and method for maintaining information during neighbor list updates comprising acquiring information of a first plurality of GSM neighbor cells; recording and keeping the information for a time period T; receiving a second plurality of GSM neighbor cells; comparing the second plurality of GSM neighbor cells with the first plurality of GSM cells in the record; if a GSM neighbor cell from the second plurality of GSM neighbor cells is not in the record, gathering information pertaining to the GSM neighbor cell; and if at least one GSM neighbor cell from the second plurality of GSM neighbor cells is in the record, determining if the age of the information pertaining to the at least one GSM neighbor cell is less than the time period T and if less than T, locating the at least one GSM neighbor cell.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: March 27, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Helen Jun Xing, Muhammad Khawar R. Khan, Rami H. Alnatsheh, Ramesh Chandra Chirala, Supratik Bhattacharjee
  • Patent number: 8139542
    Abstract: Cell timing is detected by first trying to detect a target handover cell through detecting a primary synchronization channel (P-SCH) followed by a common pilot channel (CPICH). If that fails, N number of retrials is performed using a full-window search on the CPICH. The full-window CPICH search is performed blindly, without any slot timing information from the P-SCH. Performance is improved while maintaining the benefits of faster acquisition methods in good channel conditions. The full-window search is more time consuming, but takes advantage of the stronger CPICH transmission. In good channel conditions, a mobile device can proceed quickly with the normal method of timing acquisition. With failure, the mobile device can switch to the longer search which has a higher probability of successfully completing the hard handover procedure. The overall effect is a higher success rate of hard handovers without a uniform increase of time spent in cell timing acquisition.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: March 20, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Brian Dong, Messay Amerga, Supratik Bhattacharjee, Xiaoming Zhu