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).
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Publication number: 20140365377Abstract: 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: ApplicationFiled: June 10, 2014Publication date: December 11, 2014Inventors: Hisham SALAMA, Lauren Van Heerden, Ian Sundberg, Anand Kannan, Orin Del Vecchio
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Patent number: 8611445Abstract: 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: GrantFiled: September 29, 2010Date of Patent: December 17, 2013Assignee: Texas Instruments IncorporatedInventors: Gireesh Rajendran, Anand Kannan, Krishnaswamy Thiagarajan
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Patent number: 8604974Abstract: 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: GrantFiled: March 26, 2013Date of Patent: December 10, 2013Assignee: Texas Instruments IncorporatedInventors: Saravana Kumar Ganeshan, Bijoy Bhukania, Anand Kannan
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Publication number: 20130229306Abstract: 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: ApplicationFiled: March 26, 2013Publication date: September 5, 2013Applicant: Texas Instruments IncorporatedInventors: Saravana Kumar Ganeshan, Bijoy Bhukania, Anand Kannan
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Patent number: 8427366Abstract: 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: GrantFiled: October 4, 2010Date of Patent: April 23, 2013Assignee: Texas Instruments IncorporatedInventors: Saravana Kumar Ganeshan, Bijoy Bhukania, Anand Kannan
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Publication number: 20120076241Abstract: 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: ApplicationFiled: September 29, 2010Publication date: March 29, 2012Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Gireesh Rajendran, Anand Kannan, Krishnaswamy Thiagarajan
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Patent number: 8120417Abstract: 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: GrantFiled: July 22, 2009Date of Patent: February 21, 2012Assignee: Texas Instruments IncorporatedInventors: Anand Kannan, Ranjit Kumar Guntreddi, Karthikeyan Reddy
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Publication number: 20120026039Abstract: 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: ApplicationFiled: October 4, 2010Publication date: February 2, 2012Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Saravana Kumar Ganeshan, Bijoy Bhukania, Anand Kannan
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Publication number: 20110012678Abstract: 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: ApplicationFiled: July 22, 2009Publication date: January 20, 2011Inventors: ANAND KANNAN, Ranjit Kumar Guntreddi, Karthikeyan Reddy
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Patent number: 7352821Abstract: 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: GrantFiled: January 5, 2006Date of Patent: April 1, 2008Assignee: Nokia CorporationInventors: Anand Kannan, Tamer Kadous
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Publication number: 20070253642Abstract: 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: ApplicationFiled: April 27, 2006Publication date: November 1, 2007Inventors: Arthur Berrill, Anand Kannan
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Patent number: 7154941Abstract: 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: GrantFiled: June 28, 2002Date of Patent: December 26, 2006Assignee: Nokia CorporationInventors: Anand Kannan, Gang Xu, Sridhar Rajagopal
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Patent number: 7054375Abstract: 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: GrantFiled: December 22, 2000Date of Patent: May 30, 2006Assignee: Nokia CorporationInventors: Anand Kannan, Tamer Kadous
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Publication number: 20060109925Abstract: 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: ApplicationFiled: January 5, 2006Publication date: May 25, 2006Applicant: Nokia CorporationInventors: Anand Kannan, Tamer Kadous
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Publication number: 20060017626Abstract: 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: ApplicationFiled: July 12, 2004Publication date: January 26, 2006Inventors: Anand Kannan, Tejas Bhatt
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Publication number: 20040001535Abstract: 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: ApplicationFiled: June 28, 2002Publication date: January 1, 2004Inventors: Anand Kannan, Gang Xu, Sridhar Rajagopal
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Publication number: 20020122499Abstract: 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: ApplicationFiled: December 22, 2000Publication date: September 5, 2002Inventors: Anand Kannan, Tamer A. Kadous