Patents by Inventor Anand Kannan

Anand Kannan 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).

  • Publication number: 20140365377
    Abstract: A method of authorizing a transaction involves a computer server authenticating a payment cardholder from a cardholder credential, and receiving a request from a communications terminal to initiate an online transaction with the server. The server communicates with a database of clusters, each uniquely associated with a respective cardholder and identifying an authentication card and a partial payment card number. The server requests an authentication credential from the terminal in response to determining that the requested transaction possesses a high risk of fraud. The server receives the requested authentication credential, and uses the cardholder and authentication credentials to locate the authentication card uniquely associated with the cardholder and the authentication credential in the database. The authentication credential has fewer digits than the account number of the located authentication card.
    Type: Application
    Filed: June 10, 2014
    Publication date: December 11, 2014
    Inventors: Hisham SALAMA, Lauren Van Heerden, Ian Sundberg, Anand Kannan, Orin Del Vecchio
  • Patent number: 8611445
    Abstract: A wireless transceiver includes a receiver and a transmitter, the receiver and transmitter implemented to have multiple receive and transmit channels respectively, to provide multiple-input multiple-output (MIMO) capability. In an embodiment, the transceiver is implemented to include two transmit channels and two receive channels. Some blocks/circuitry of each of the receive and transmit channels are implemented with reduced area and current consumption, with a corresponding increase in noise. In a single-input single-output (SISO) mode of operation, the receiver combines the output of both the receive channels to compensate for the increase in noise due to the implementation with smaller area and lower current consumption. Similarly, the transmitter combines the output of both the transmit channels to compensate for the increase in noise. The transceiver operates with no signal degradation in SISO mode, and with a small degradation in signal quality in the MIMO mode.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: December 17, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Gireesh Rajendran, Anand Kannan, Krishnaswamy Thiagarajan
  • Patent number: 8604974
    Abstract: An electronic circuit separates frequency-overlapped GLONASS and GPS overlapped in an approximately 4 MHz passband. The circuit uses a multiple-path analog-to-digital converter circuit (ADC). A sampling rate circuit is coupled to concurrently operate the analog-to-digital converter circuit at a sampling rate between about 60 Msps and about 80 Msps. A digital processing circuit includes storage defining complex de-rotation and low pass filtering. The digital processing circuit is fed by the analog-to-digital converter circuit and is operable A) to establish an access rate and respective distinct phase increments for the complex de-rotation, B) to execute the complex de-rotation by combinations of trigonometric multiplications using the distinct phase increments approximately concurrently and C) to execute the low pass filtering on the complex de-rotation resulting at the access rate and respective distinct phase increments, thus delivering GPS and Glonass signals separated from each other.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: December 10, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Saravana Kumar Ganeshan, Bijoy Bhukania, Anand Kannan
  • Publication number: 20130229306
    Abstract: A wireless receiver for multiple frequency bands reception includes a single receive radio frequency (RF) circuit (160, 170) having an RF bandpass substantially confined to encompass at least two non-overlapped such frequency bands at RF, a single in-phase and quadrature (approximately I, Q) pair of intermediate frequency (IF) sections (120I, 120Q) having an IF passband, and a mixer circuit (110) including an in-phase and quadrature (I,Q) pair of mixers (110I, 110Q) fed by said RF circuit (160, 170) and having a local oscillator (100) with in-phase and quadrature outputs coupled to said mixers (110I, 110Q) respectively, said mixer circuit (110) operable to inject and substantially overlap the at least two non-overlapped frequency bands with each other into the IQ IF sections (120I, 120Q) in the IF passband, the IF passband substantially confined to a bandwidth encompassing the thereby-overlapped frequency bands.
    Type: Application
    Filed: March 26, 2013
    Publication date: September 5, 2013
    Applicant: Texas Instruments Incorporated
    Inventors: Saravana Kumar Ganeshan, Bijoy Bhukania, Anand Kannan
  • Patent number: 8427366
    Abstract: A wireless receiver for multiple frequency bands reception includes a single receive radio frequency (RF) circuit (160, 170) having an RF bandpass substantially confined to encompass at least two non-overlapped such frequency bands at RF, a single in-phase and quadrature (approximately I, Q) pair of intermediate frequency (IF) sections (120I, 120Q) having an IF passband, and a mixer circuit (110) including an in-phase and quadrature (I,Q) pair of mixers (110I, 110Q) fed by said RF circuit (160, 170) and having a local oscillator (100) with in-phase and quadrature outputs coupled to said mixers (110I, 110Q) respectively, said mixer circuit (110) operable to inject and substantially overlap the at least two non-overlapped frequency bands with each other into the IQ IF sections (120I, 120Q) in the IF passband, the IF passband substantially confined to a bandwidth encompassing the thereby-overlapped frequency bands.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: April 23, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Saravana Kumar Ganeshan, Bijoy Bhukania, Anand Kannan
  • Publication number: 20120076241
    Abstract: A wireless transceiver includes a receiver and a transmitter, the receiver and transmitter implemented to have multiple receive and transmit channels respectively, to provide multiple-input multiple-output (MIMO) capability. In an embodiment, the transceiver is implemented to include two transmit channels and two receive channels. Some blocks/circuitry of each of the receive and transmit channels are implemented with reduced area and current consumption, with a corresponding increase in noise. In a single-input single-output (SISO) mode of operation, the receiver combines the output of both the receive channels to compensate for the increase in noise due to the implementation with smaller area and lower current consumption. Similarly, the transmitter combines the output of both the transmit channels to compensate for the increase in noise. The transceiver operates with no signal degradation in SISO mode, and with a small degradation in signal quality in the MIMO mode.
    Type: Application
    Filed: September 29, 2010
    Publication date: March 29, 2012
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Gireesh Rajendran, Anand Kannan, Krishnaswamy Thiagarajan
  • Patent number: 8120417
    Abstract: A filter circuit includes a differential amplifier circuit to provide a number of poles including a dominant pole, and a feedback circuit to feed a portion of an output of the differential amplifier circuit to an input of the differential amplifier circuit. The feedback circuit includes a feedback resistor and a feedback capacitor to provide a controllable increase in an order of a transfer function of the filter circuit along with non-dominant poles of the differential amplifier circuit coupled in parallel with the feedback resistor. Coefficients of a transfer function of the differential amplifier circuit are forced to substantially depend solely on one or more of a plurality of passive circuit elements, the feedback resistor, and the feedback capacitor to control a dependence of the transfer function of the filter circuit on a gain of the differential amplifier circuit and poles of the differential amplifier circuit.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: February 21, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Anand Kannan, Ranjit Kumar Guntreddi, Karthikeyan Reddy
  • Publication number: 20120026039
    Abstract: A wireless receiver for multiple frequency bands reception includes a single receive radio frequency (RF) circuit (160, 170) having an RF bandpass substantially confined to encompass at least two non-overlapped such frequency bands at RF, a single in-phase and quadrature (approximately I, Q) pair of intermediate frequency (IF) sections (120I, 120Q) having an IF passband, and a mixer circuit (110) including an in-phase and quadrature (I,Q) pair of mixers (110I, 110Q) fed by said RF circuit (160, 170) and having a local oscillator (100) with in-phase and quadrature outputs coupled to said mixers (110I, 110Q) respectively, said mixer circuit (110) operable to inject and substantially overlap the at least two non-overlapped frequency bands with each other into the IQ IF sections (120I, 120Q) in the IF passband, the IF passband substantially confined to a bandwidth encompassing the thereby-overlapped frequency bands. Other receivers, circuits.
    Type: Application
    Filed: October 4, 2010
    Publication date: February 2, 2012
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Saravana Kumar Ganeshan, Bijoy Bhukania, Anand Kannan
  • Publication number: 20110012678
    Abstract: A filter circuit includes a differential amplifier circuit to provide a number of poles including a dominant pole, and a feedback circuit to feed a portion of an output of the differential amplifier circuit to an input of the differential amplifier circuit. The feedback circuit includes a feedback resistor and a feedback capacitor to provide a controllable increase in an order of a transfer function of the filter circuit along with non-dominant poles of the differential amplifier circuit coupled in parallel with the feedback resistor. Coefficients of a transfer function of the differential amplifier circuit are forced to substantially depend solely on one or more of a plurality of passive circuit elements, the feedback resistor, and the feedback capacitor to control a dependence of the transfer function of the filter circuit on a gain of the differential amplifier circuit and poles of the differential amplifier circuit.
    Type: Application
    Filed: July 22, 2009
    Publication date: January 20, 2011
    Inventors: ANAND KANNAN, Ranjit Kumar Guntreddi, Karthikeyan Reddy
  • Patent number: 7352821
    Abstract: A method and apparatus reduces error in a communication system that includes multiple orthogonal subcarriers by suppressing a subcarrier in a transmitting communication device and by equalizing a received signal in a receiving communication device. Subcarrier suppression is based on a determination of a signal quality metric with respect to each subcarrier or is based on a determination of excessive signal power overdriving an amplifier of the receiving communication device. Equalization of the received signal is based on an equalization function that reduces a multipath delay introduced to the transmitted signal when the multipath delay exceeds a tolerable multipath delay.
    Type: Grant
    Filed: January 5, 2006
    Date of Patent: April 1, 2008
    Assignee: Nokia Corporation
    Inventors: Anand Kannan, Tamer Kadous
  • Publication number: 20070253642
    Abstract: The invention relates to a method and apparatus that uses an R-tree's vector data as a mechanism for query and retrieval of raster data in conjunction with or instead of the vector data. The invention relates to a method of storing, indexing and retrieving raster data comprising: storing raster data, storing vector data, and indexing said raster data and said vector data with same index information.
    Type: Application
    Filed: April 27, 2006
    Publication date: November 1, 2007
    Inventors: Arthur Berrill, Anand Kannan
  • Patent number: 7154941
    Abstract: Apparatus, and an associated method, for operating upon data communicated during operation of a communication system. A vector processor is provided for a modem (MOdulator/DEModulator), and the modem functionality is effectuated through the execution of algorithms at the vector processor. The algorithms are vectorized and stored at a memory device. The algorithms are accessed and provided to parallel processing devices of the vector processor and are executed thereat. The modifiability and scalability of the modem is significantly improved relative to conventional modem devices.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: December 26, 2006
    Assignee: Nokia Corporation
    Inventors: Anand Kannan, Gang Xu, Sridhar Rajagopal
  • Patent number: 7054375
    Abstract: A method and apparatus reduces error in a communication system that includes multiple orthogonal subcarriers by suppressing a subcarrier in a transmitting communication device and by equalizing a received signal in a receiving communication device. Subcarrier suppression is based on a determination of a signal quality metric with respect to each subcarrier or is based on a determination of excessive signal power overdriving an amplifier of the receiving communication device. Equalization of the received signal is based on an equalization function that reduces a multipath delay introduced to the transmitted signal when the multipath delay exceeds a tolerable multipath delay.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: May 30, 2006
    Assignee: Nokia Corporation
    Inventors: Anand Kannan, Tamer Kadous
  • Publication number: 20060109925
    Abstract: A method and apparatus reduces error in a communication system that includes multiple orthogonal subcarriers by suppressing a subcarrier in a transmitting communication device and by equalizing a received signal in a receiving communication device. Subcarrier suppression is based on a determination of a signal quality metric with respect to each subcarrier or is based on a determination of excessive signal power overdriving an amplifier of the receiving communication device. Equalization of the received signal is based on an equalization function that reduces a multipath delay introduced to the transmitted signal when the multipath delay exceeds a tolerable multipath delay.
    Type: Application
    Filed: January 5, 2006
    Publication date: May 25, 2006
    Applicant: Nokia Corporation
    Inventors: Anand Kannan, Tamer Kadous
  • Publication number: 20060017626
    Abstract: An antenna module for use with a mobile telecommunication device such as a mobile phone. The antenna module includes an antenna element and, preferably, an RF (radio frequency) chain having receive circuitry and perhaps an analog-to-digital converter or other electrical components. Transmit circuitry may be present as well. The antenna module has a housing, in one or more parts, for supporting these components, and a jack through which power and data links can be formed. The jack may provide a means for adjusting the antenna so that its orientation relative to the mobile phone antenna may be altered.
    Type: Application
    Filed: July 12, 2004
    Publication date: January 26, 2006
    Inventors: Anand Kannan, Tejas Bhatt
  • Publication number: 20040001535
    Abstract: Apparatus, and an associated method, for operating upon data communicated during operation of a communication system. A vector processor is provided for a modem (MOdulator/DEModulator), and the modem functionality is effectuated through the execution of algorithms at the vector processor. The algorithms are vectorized and stored at a memory device. The algorithms are accessed and provided to parallel processing devices of the vector processor and are executed thereat. The modifiability and scalability of the modem is significantly improved relative to conventional modem devices.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 1, 2004
    Inventors: Anand Kannan, Gang Xu, Sridhar Rajagopal
  • Publication number: 20020122499
    Abstract: A method and apparatus reduces error in a communication system that includes multiple orthogonal subcarriers by suppressing a subcarrier in a transmitting communication device and by equalizing a received signal in a receiving communication device. Subcarrier suppression is based on a determination of a signal quality metric with respect to each subcarrier or is based on a determination of excessive signal power overdriving an amplifier of the receiving communication device. Equalization of the received signal is based on an equalization function that reduces a multipath delay introduced to the transmitted signal when the multipath delay exceeds a tolerable multipath delay.
    Type: Application
    Filed: December 22, 2000
    Publication date: September 5, 2002
    Inventors: Anand Kannan, Tamer A. Kadous