Patents by Inventor Timothy Schmidl

Timothy Schmidl 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: 20230291436
    Abstract: A system and method for enhanced channel hopping sequence is described. A pseudo random channel hopping sequence is redistributed using certain system specific parameters for separating adjacent transmission channels within a predetermined number of consecutive transmission channel numbers in the random channel hopping sequence to improve inter-channel interference between adjacent transmission channels.
    Type: Application
    Filed: May 22, 2023
    Publication date: September 14, 2023
    Inventors: Kumaran VIJAYASANKAR, Timothy SCHMIDL, Ramanuja VEDANTHAM
  • Patent number: 11700033
    Abstract: A system and method for enhanced channel hopping sequence is described. A pseudo random channel hopping sequence is redistributed using certain system specific parameters for separating adjacent transmission channels within a predetermined number of consecutive transmission channel numbers in the random channel hopping sequence to improve inter-channel interference between adjacent transmission channels.
    Type: Grant
    Filed: May 11, 2021
    Date of Patent: July 11, 2023
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Kumaran Vijayasankar, Timothy Schmidl, Ramanuja Vedantham
  • Patent number: 11405042
    Abstract: In described examples, a method of operating a transceiver with a transmitter and a receiver includes generating a frequency reference. In the transmitter: A phase locked loop (PLL) generates a first voltage controlled oscillator (VCO) control voltage responsive to the frequency reference. A VCO in the transmitter generates a transmitter VCO signal responsive to the first VCO control voltage, and the PLL is locked to the transmitter VCO signal. In the receiver: A signal is received. A receiver VCO generates a receiver VCO signal responsive to the first or a second VCO control voltage. The receiver VCO signal is multiplied by the received signal to generate an I component, and by the received signal phase shifted by 90° to generate a Q component. The second VCO control signal is generated responsive to the I component and the Q component.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: August 2, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Salvatore Luciano Finocchiaro, Timothy Schmidl, Tolga Dinc, Gerd Schuppener, Siraj Akhtar, Swaminathan Sankaran, Baher Haroun
  • Publication number: 20210266034
    Abstract: A system and method for enhanced channel hopping sequence is described. A pseudo random channel hopping sequence is redistributed using certain system specific parameters for separating adjacent transmission channels within a predetermined number of consecutive transmission channel numbers in the random channel hopping sequence to improve inter-channel interference between adjacent transmission channels.
    Type: Application
    Filed: May 11, 2021
    Publication date: August 26, 2021
    Inventors: Kumaran VIJAYASANKAR, Timothy SCHMIDL, Ramanuja VEDANTHAM
  • Publication number: 20210203331
    Abstract: In described examples, a method of operating a transceiver with a transmitter and a receiver includes generating a frequency reference. In the transmitter: A phase locked loop (PLL) generates a first voltage controlled oscillator (VCO) control voltage responsive to the frequency reference. A VCO in the transmitter generates a transmitter VCO signal responsive to the first VCO control voltage, and the PLL is locked to the transmitter VCO signal. In the receiver: A signal is received. A receiver VCO generates a receiver VCO signal responsive to the first or a second VCO control voltage. The receiver VCO signal is multiplied by the received signal to generate an I component, and by the received signal phase shifted by 90° to generate a Q component. The second VCO control signal is generated responsive to the I component and the Q component.
    Type: Application
    Filed: December 31, 2019
    Publication date: July 1, 2021
    Inventors: Salvatore Luciano Finocchiaro, Timothy Schmidl, Tolga Dinc, Gerd Schuppener, Siraj Akhtar, Swaminathan Sankaran, Baher Haroun
  • Patent number: 11005524
    Abstract: A system and method for enhanced channel hopping sequence is described. A pseudo random channel hopping sequence is redistributed using certain system specific parameters for separating adjacent transmission channels within a predetermined number of consecutive transmission channel numbers in the random channel hopping sequence to improve inter-channel interference between adjacent transmission channels.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: May 11, 2021
    Assignee: Texas Instruments Incorporated
    Inventors: Kumaran Vijayasankar, Timothy Schmidl, Ramanuja Vedantham
  • Publication number: 20200212957
    Abstract: A system and method for enhanced channel hopping sequence is described. A pseudo random channel hopping sequence is redistributed using certain system specific parameters for separating adjacent transmission channels within a predetermined number of consecutive transmission channel numbers in the random channel hopping sequence to improve inter-channel interference between adjacent transmission channels.
    Type: Application
    Filed: March 10, 2020
    Publication date: July 2, 2020
    Inventors: Kumaran VIJAYASANKAR, Timothy SCHMIDL, Ramanuja VEDANTHAM
  • Patent number: 10594360
    Abstract: A system and method for enhanced channel hopping sequence is described. A pseudo random channel hopping sequence is redistributed using certain system specific parameters for separating adjacent transmission channels within a predetermined number of consecutive transmission channel numbers in the random channel hopping sequence to improve inter-channel interference between adjacent transmission channels.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: March 17, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Kumaran Vijayasankar, Timothy Schmidl, Ramanuja Vedantham
  • Publication number: 20160344443
    Abstract: A system and method for enhanced channel hopping sequence is described. A pseudo random channel hopping sequence is redistributed using certain system specific parameters for separating adjacent transmission channels within a predetermined number of consecutive transmission channel numbers in the random channel hopping sequence to improve inter-channel interference between adjacent transmission channels.
    Type: Application
    Filed: December 29, 2015
    Publication date: November 24, 2016
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: KUMARAN VIJAYASANKAR, TIMOTHY SCHMIDL, RAMANUJA VEDANTHAM
  • Patent number: 8331215
    Abstract: This invention is a transmission scheme for multi-ACK/NAK and SRI in TDD. The described scheme enables using DAI as pure counter. QPSK is adopted as the modulation scheme in this invention which guarantees satisfactory detection performance. Link level simulations show that the event of one DL grant pass followed by three consecutive DL grant misses is of low probability.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: December 11, 2012
    Assignee: Texas Instruements Incorporated
    Inventors: Zukang Shen, Tarik Muharemovic, Timothy Schmidl
  • Publication number: 20100329194
    Abstract: This invention is a transmission scheme for multi-ACK/NAK and SRI in TDD. The described scheme enables using DAI as pure counter. QPSK is adopted as the modulation scheme in this invention which guarantees satisfactory detection performance. Link level simulations show that the event of one DL grant pass followed by three consecutive DL grant misses is of low probability.
    Type: Application
    Filed: July 14, 2009
    Publication date: December 30, 2010
    Applicant: Texas Instruments Incorporated
    Inventors: Zukang Shen, Tarik Muharemovic, Timothy Schmidl
  • Patent number: 7668564
    Abstract: Embodiments of the invention provide embodiments of the invention provide and method, network entity and user equipment for slow uplink power control of user equipment in a wireless communication system by responding to a long term control metric that is derived from an uplink channel metric over a plurality of transmission instances and a set of performance criteria. A method for slow uplink power control in accordance with and embodiment of the invention measures at least one uplink channel metric for user equipment and then determines an appropriate transmit power for the user equipment by using a control metric derived from the uplink channel metric corresponding to a plurality of transmission instances for the user equipment.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: February 23, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Eko N. Onggosanusi, Timothy A. Schmidl, Aris Papasakellariou, Anand Dabak
  • Patent number: 7660229
    Abstract: Embodiments of the invention provide method and apparatus for generating a structure in an orthogonal frequency division multiplexing OFDM communication system having a transmitter with one or more transmitting antennas. The method includes composing a frame with a time domain and a frequency domain. The frame has a transmission time interval in the time domain and occupies a bandwidth in the frequency domain. The transmission time interval has multiple orthogonal frequency division multiplexing symbols. A pilot signal is located from a transmitting antenna into two non-consecutive orthogonal frequency division multiplexing symbols of the frame.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: February 9, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Aris Papasakellariou, Timothy A Schmidl, Eko N Onggosanusi, Anand Dabak
  • Patent number: 7565111
    Abstract: A receiver (MST) for use in a modulated communications system wherein data is communicated in a time-slotted format. The receiver comprises circuitry (22) for providing samples of a group of data from the time-slotted format and circuitry (46, 42) for determining a first set of channel estimates in response to a first set of the samples. The receiver also comprises circuitry (30) for first predicting decisions for data in the group of data in response to the first set of channel estimates and circuitry (46, 42) for determining a second set of channel estimates in response to the predicted decisions. Lastly, the circuitry for predicting is further for second predicting decisions for data in the group of data in response to the second set of channel estimates.
    Type: Grant
    Filed: October 18, 2004
    Date of Patent: July 21, 2009
    Assignee: Texas Instruments Incorporated
    Inventors: Eko Onggosanusi, Anand Dabak, Timothy Schmidl
  • Publication number: 20080170638
    Abstract: A wireless communication system (10). The system comprises transmitter circuitry (BST1) comprising circuitry for transmitting a plurality of frames to a receiver in a first cell (Cell 1). Each of the plurality of frames comprises a bit group (22), and the bit group uniquely distinguishes the first cell from a second cell (Cell 2) adjacent the first cell. The transmitter circuitry further comprises circuitry (54) for inserting a bit sequence into the bit group. The bit sequence is selected from a plurality of bit sequences (S1-SK) such that successive transmissions by the transmitter circuitry comprise a cycle of successive ones of the plurality of bit sequences.
    Type: Application
    Filed: February 20, 2008
    Publication date: July 17, 2008
    Inventors: Timothy Schmidl, Alan Gatherer, Anand G. Dabak
  • Patent number: 7369523
    Abstract: A method described evaluates the pilot-to-data power ratio based on the values of the demodulated data at the output of a receiver such as a conventional maximal ratio combiner or an equalizer receiver. Since the data are not scaled to their particular decision grid, their distribution and statistics deviate from the ones defined by the known decision grid. Measuring these deviations of the statistics, the pilot-to-data power ratio and the appropriate demodulated data scaling can be accurately determined. Subsequent data processing may then commence.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: May 6, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Aris Papasakellariou, Timothy Schmidl, Anand Dabak
  • Publication number: 20080089455
    Abstract: System and method for interference cancellation in a digital wireless communications system. A preferred embodiment comprises sampling a received signal wherein the received signal is real-valued, rotating the sampled received signal by a specified amount, extracting in-phase and quadrature phase streams from the rotated, sampled received signal, applying an interference suppression filter and combining the filtered streams. The output of the combining operation can be de-correlated (by whitening) if there is excessive correlation.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 17, 2008
    Inventors: Eko Onggosanusi, Anand Dabak, Timothy Schmidl
  • Patent number: 7289570
    Abstract: A wireless system (e.g., Bluetooth, WCDMA, etc.) with multiple antenna communication channel eigenvector weighted transmissions including possibly differing order symbol constellations for differing eigenvectors. Comparison of maximizations of minimum received symbol distances provides for selection of eigenvector combinations and symbol constellations.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: October 30, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Timothy Schmidl, Mohammed Nafie, Anand G. Dabak
  • Publication number: 20070104151
    Abstract: Embodiments of the invention provide methods for maximizing the bandwidth utilization in the uplink of a communication system supporting time division multiplexing between unicast and multicast/broadcast communication modes during transmission time intervals in the downlink of a communication system. This is accomplished by multiplexing at least unicast control signaling for UL scheduling assignments in TTIs supporting the multicast/broadcast communication mode. Moreover, multiplexing of unicast control signaling can also be accomplished by splitting a symbol of the multicast/broadcast TTI into two shorter symbols with the first of these two shorter symbols carrying at least unicast control signaling and the second of these shorter symbols carrying multicast/broadcast signaling.
    Type: Application
    Filed: October 31, 2006
    Publication date: May 10, 2007
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Aris Papasakellariou, Timothy Schmidl, Eko Onggosanusi, Anand Dabak
  • Publication number: 20070004465
    Abstract: Embodiments of the invention provide method and structure for boosting pilot signal power relative to data signal power. The velocity of user equipment is obtained. The velocity measurement is used in determining the transmission power of the pilot signal and applying the increase to a plurality of pilots and decreasing the data signal power by a proportional amount.
    Type: Application
    Filed: June 29, 2006
    Publication date: January 4, 2007
    Inventors: Aris Papasakellariou, Timothy Schmidl, Eko Onggosanusi, Anand Dabak, Tarik Muharemovic