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: 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
  • Publication number: 20060291581
    Abstract: Closed loop multiple-antenna wireless communications system with antenna weights determined by maximizing a composite channel signal-to-interference-plus-noise ratio minimum. Multiplexed symbol streams over subsets of antennas enhance throughput.
    Type: Application
    Filed: August 30, 2006
    Publication date: December 28, 2006
    Inventors: Eko Onggosanusi, Anand Dabak, Timothy Schmidl
  • Publication number: 20060286995
    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: Application
    Filed: June 20, 2006
    Publication date: December 21, 2006
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Eko Onggosanusi, Timothy Schmidl, Aris Papasakellariou, Anand Dabak
  • Publication number: 20060285484
    Abstract: Embodiments of the invention provide method and apparatus for generating a structure in an orthogonal frequency division multiplexing communication system having a transmitter with a least one transmitting antenna, said method comprising; composing a frame with a time domain and a frequency domain, wherein the frame has a transmission time interval in the time domain and locating a pilot signal, having pilot power level, from a first at least one antenna into two orthogonal frequency division multiplexing symbols of said frame.
    Type: Application
    Filed: June 19, 2006
    Publication date: December 21, 2006
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Aris Papasakellariou, Timothy Schmidl, Eko Onggosanusi, Anand Dabak
  • Publication number: 20060280143
    Abstract: A communication circuit (28) is designed with a signal processing circuit (370) arranged to produce a first plurality of data signals and receive a second plurality of data signals. A transmit circuit (364) is coupled to receive the first plurality of data signals and transmit each data signal of the first plurality of data signals on a respective transmit frequency in a predetermined sequence of transmit frequencies. A receive circuit (362) is coupled to receive each data signal of the second plurality of data signals from a remote transmitter on the respective transmit frequency in the predetermined sequence. The receive circuit applies the second plurality of data signals to the signal processing circuit.
    Type: Application
    Filed: August 22, 2006
    Publication date: December 14, 2006
    Inventors: Anand Dabak, Mohammed Nafie, Timothy Schmidl, Alan Gatherer
  • Publication number: 20060250941
    Abstract: A method of transmitting a wireless signal (FIGS. 3A-3C) is disclosed. A data stream is divided (306) into a first data stream and a second data stream. The first data stream is encoded (300) at a first data rate. The second data stream is encoded (320) at a second data rate different from the first data rate. A first part of the encoded first data stream is transmitted from a first transmit antenna (308). A second part of the encoded first data stream is transmitted from a second transmit antenna (312).
    Type: Application
    Filed: May 5, 2006
    Publication date: November 9, 2006
    Inventors: Eko Onggosanusi, Anand Dabak, Timothy Schmidl, Badri Varadarajan
  • Patent number: 7133435
    Abstract: A method for reducing multiple access interference (MAI) in a code division multiple access (CDMA) spread spectrum receiver assigned a number of codes which also despreads the received signal with the remaining codes of the same spreading factor. For forward link transmission with orthogonal codes, as in 3GPP and 3GPP2, interferers using larger spreading factors than the one used by the referenced mobile will have codes that are formed from the orthogonal codes of the same spreading factor as the multicodes corresponding to the referenced mobile. As a consequence, in a multipath environment, the output of a despreader using any of these remaining orthogonal codes will provide an estimate of the composite interference attributed to signals, if any, using codes that partly comprise the corresponding orthogonal code. No decisions are made for the previous despreader's output because it corresponds to a sum of interferers with unknown powers.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: November 7, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Aris Papasakellariou, Anand Dabak, Timothy Schmidl, Eko Onggosanusi
  • Publication number: 20060215795
    Abstract: Interference cancellation/suppression by a wide band radio (100) includes the steps of searching for all narrow band interferer signals such as Bluetooth signals (502). Communicating with the detected Bluetooth piconets (504). Estimating when the Bluetooth signals will occur (506) using the information received during step (504) . And using a suppression technique in association with the estimations as to when/where the interfering signals will occur in order to counter the interfering signal(s). In an alternate embodiment, both the narrow band (304) and wide band (302) signals are stored (306). Then the one or more narrow band Bluetooth signal(s) (304) and decoded (308) and subtracted (308) from the wide band packet prior to it being decoded (312).
    Type: Application
    Filed: May 10, 2006
    Publication date: September 28, 2006
    Applicant: Texas Instruments Incorporated
    Inventors: Mohammed Nafie, Timothy Schmidl, Anand Dabak
  • Publication number: 20060187876
    Abstract: A method of power saving for a wireless transceiver (FIGS. 1 and 2) is disclosed. The transceiver has an active power mode (504) and a reduced power mode (510). The transceiver is operated in the reduced power mode (510) and monitors transmissions from a remote wireless transmitter while in the reduced power mode. The transceiver identifies a transmission from the remote wireless transmitter by a transceiver identity included in the transmission (FIG. 6, UE identification). The transceiver transitions to the active power mode (512) in response to identifying the transmission.
    Type: Application
    Filed: February 22, 2006
    Publication date: August 24, 2006
    Inventors: Timothy Schmidl, Eko Onggosanusi, Anand Dabak, Aris Papasakellariou