Patents by Inventor Alan Gatherer

Alan Gatherer 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: 8396058
    Abstract: In one form of the invention, a process of sending real-time information from a sender computer (103) to a receiver computer (105) coupled to the sender computer (103) by a packet network (100) wherein packets (111,113) sometimes become lost, includes steps of directing (441) packets (111) containing the real-time information from the sender computer (103) by at least one path (119) in the packet network (100) to the receiver computer (105), and directing packets (113) containing information dependent on the real-time information from the sender computer (103) by at least one path diversity path (117) in the packet network (100) to the same receiver computer (105).
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: March 12, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Stephen J. Perkins, Alan Gatherer, Krishnasamy Anandakumar, Alan V. McCree, Vishu Viswanathan
  • Patent number: 8134996
    Abstract: The present invention provides a method of operating a base station transmitter. In one embodiment, the method includes providing a cellular downlink synchronization signal having primary and secondary portions, wherein the primary portion is common for all cells and the secondary portion is cell-specific and transmitting the cellular downlink synchronization signal. In another embodiment, the method includes providing a cellular downlink synchronization signal having primary and secondary portions wherein the primary portion employs a corresponding one of a plurality of different primary signals allocated to adjoining transmission cells. The method also includes further providing cell-specific information in the secondary portion and transmitting the cellular downlink synchronization signal. The present invention also provides a method of operating user equipment.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: March 13, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Eko N. Onggosanusi, Anand G. Dabak, Timothy M. Schmidl, Alan Gatherer
  • Patent number: 8107420
    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: Grant
    Filed: February 20, 2008
    Date of Patent: January 31, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Timothy M. Schmidl, Alan Gatherer, Anand G. Dabak
  • Publication number: 20110211573
    Abstract: In one form of the invention, a process of sending real-time information from a sender computer (103) to a receiver computer (105) coupled to the sender computer (103) by a packet network (100) wherein packets (111,113) sometimes become lost, includes steps of directing (441) packets (111) containing the real-time information from the sender computer (103) by at least one path (119) in the packet network (100) to the receiver computer (105), and directing packets (113) containing information dependent on the real-time information from the sender computer (103) by at least one path diversity path (117) in the packet network (100) to the same receiver computer (105).
    Type: Application
    Filed: May 5, 2011
    Publication date: September 1, 2011
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Stephen J. Perkins, Alan Gatherer, Krishanasamy Anandakumar, Alan V. McCree, Vishu Viswanathan
  • Patent number: 7961758
    Abstract: In one form of the invention, a process of sending real-time information from a sender computer (103) to a receiver computer (105) coupled to the sender computer (103) by a packet network (100) wherein packets (111,113) sometimes become lost, includes steps of directing (441) packets (111) containing the real-time information from the sender computer (103) by at least one path (119) in the packet network (100) to the receiver computer (105), and directing packets (113) containing information dependent on the real-time information from the sender computer (103) by at least one path diversity path (117) in the packet network (100) to the same receiver computer (105).
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: June 14, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Stephen J. Perkins, Alan Gatherer, Krishnasamy Anandakumar, Alan V. McCree, Vishu Viswanathan
  • Publication number: 20110112606
    Abstract: An integrated circuit (IC) chip (100) expanded to nerve fiber (602) growth in the third dimension by through-silicon via-holes (TSV) (131), with an electrically conductive inner sidewall (303) having a roughness (303a) suitable for supporting the growing fiber and conductive connections (210) to the circuitry (101). The TSVs are fabricated parallel to each other and may be arrayed in regular patterns. The chip, provided with a pad (230) for contacting a nerve end and attaching a neuron, acts as a permanent protective sheath for the parallel growing fibers. Nerve fiber growth is stimulated by combining in the chip electrical and magnetic pulses and neurotrophic factors (603); continuous communication with external monitors is provided. The IC provides each TSV with a signal generator, electric and magnetic field generator, power source, potential sensor, and transceiver.
    Type: Application
    Filed: November 12, 2009
    Publication date: May 12, 2011
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Alan Gatherer, Walter H. Schroen
  • Publication number: 20100091800
    Abstract: In one form of the invention, a process of sending real-time information from a sender computer (103) to a receiver computer (105) coupled to the sender computer (103) by a packet network (100) wherein packets (111,113) sometimes become lost, includes steps of directing (441) packets (111) containing the real-time information from the sender computer (103) by at least one path (119) in the packet network (100) to the receiver computer (105), and directing packets (113) containing information dependent on the real-time information from the sender computer (103) by at least one path diversity path (117) in the packet network (100) to the same receiver computer (105).
    Type: Application
    Filed: December 15, 2009
    Publication date: April 15, 2010
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Stephen J. Perkins, Alan Gatherer, Krishnasamy Anandakumar, Alan V. McCree, Vishu Viswanathan
  • Patent number: 7693062
    Abstract: In one form of the invention, a process of sending real-time information from a sender computer (103) to a receiver computer (105) coupled to the sender computer (103) by a packet network (100) wherein packets (111,113) sometimes become lost, includes steps of directing (441) packets (111) containing the real-time information from the sender computer (103) by at least one path (119) in the packet network (100) to the receiver computer (105), and directing packets (113) containing information dependent on the real-time information from the sender computer (103) by at least one path diversity path (117) in the packet network (100) to the same receiver computer (105).
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: April 6, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Stephen J. Perkins, Alan Gatherer, Krishanasamy Anandakumar, Alan V. McCree, Vishu Viswanathan
  • Patent number: 7634019
    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: Grant
    Filed: August 22, 2006
    Date of Patent: December 15, 2009
    Assignee: Texas Instruments Incorporated
    Inventors: Anand G. Dabak, Mohammed Nafie, Timothy M. Schmidl, Alan Gatherer
  • Patent number: 7457381
    Abstract: Multipath relative channel estimations for weighting maximal ratio combining of RAKE detectors in wireless communication systems uses maximal eigenvectors of covariance matrices of path signals. Estimates for close-in and outlying sets of symbols provides linear time change channel estimation.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: November 25, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Srinath Hosur, Alan Gatherer, Eko N. Onggosanusi
  • Patent number: 7450672
    Abstract: An apparatus and method for transmitting and receiving a bit stream. On the transmission side, coded bits (Y.sub.t) and an interleaved version of the coded bits (X.sub.t) are separately modulated and transmitted. On the reception side, a priori output probabilities produced by a probability generator (34) are combined (112) and then input to a SISO decoder (111). Combined a posteriori output probabilities (115) produced by the SISO decoder are split (113) and then fed back to the probability generator.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: November 11, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Alan Gatherer, Tarik Muharemovic, Everest W. Huang, Srinath Hosur
  • 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: 7400608
    Abstract: The interference cancellation (IC) system (500) includes a plurality of IC units, for which IC is applied. Each IC unit has its spread spectrum code generator, delay devices, correlators or matched filters (MF), spreading circuits and subtracting and adding devices. The IC process in accordance with the invention includes using a bank of MF to despread the received signal at every time instant corresponding to every identified multipath of every user's transmitted signal. Based on the despread signals, an initial decision for the present information symbol of every user can be made using a single-user receiver such as, for example, the conventional Rake receiver or an equalizer. Based on the initial decisions, IC regenerates the multipath signals for each user using timed versions of the spread spectrum code, the delays of the multipaths, and the corresponding channel medium estimates.
    Type: Grant
    Filed: January 11, 2005
    Date of Patent: July 15, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Aris Papasakellariou, Alan Gatherer
  • Patent number: 7386326
    Abstract: A programmable co-processor system comprising a datapath, a microprogram, and a microcontroller is provided. The datapath includes one or more datapath elements operable to receive input signals. The microprogram memory includes a microprogram operable to control the datapath in order to process the input signals. The microcontroller is operable to modify the microprogram based on a modification command.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: June 10, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Vijay Sundararajan, Sriram Sundararajan, Alan Gatherer
  • Patent number: 7372825
    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: Grant
    Filed: June 28, 2000
    Date of Patent: May 13, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Timothy M. Schmidl, Alan Gatherer, Anand G. Dabak
  • Publication number: 20080019350
    Abstract: The present invention provides a method of operating a base station transmitter. In one embodiment, the method includes providing a cellular downlink synchronization signal having primary and secondary portions, wherein the primary portion is common for all cells and the secondary portion is cell-specific and transmitting the cellular downlink synchronization signal. In another embodiment, the method includes providing a cellular downlink synchronization signal having primary and secondary portions wherein the primary portion employs a corresponding one of a plurality of different primary signals allocated to adjoining transmission cells. The method also includes further providing cell-specific information in the secondary portion and transmitting the cellular downlink synchronization signal. The present invention also provides a method of operating user equipment.
    Type: Application
    Filed: July 21, 2006
    Publication date: January 24, 2008
    Inventors: Eko N. Onggosanusi, Anand G. Dabak, Timothy M. Schmidl, Alan Gatherer
  • Patent number: 7280585
    Abstract: This invention provide parallel interference cancellation for wireless communication base stations. Received user inputs symbols are spread by means of pseudo-noise sequences to form user input chip vectors. These are added together and interpreted to form chip vectors of interference samples. These chip vectores are despread to form interference output symbols by pseudo-noise sequences. The interference output signals are subtracted from the received user input symbols to obtain a first estimate of transmitted symbols. This process may be continued for two or more iterations to obtain better interference cancellation.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: October 9, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Sundararajan Sriram, Alan Gatherer
  • Patent number: 7180955
    Abstract: Parallel concatenated trellis-coding modulation is accomplished by producing coded bits (21) from uncoded bits and also producing an interleaved version (22) of the coded bits from the uncoded bits. A first coded bits-to-signal mapping (mapping 1) is applied to the coded bits to produce a first output signal (S11), and a second coded bits-to-signal mapping (mapping 2) is applied to the interleaved version of the coded bits to produce a second output signal (S22), wherein the second coded bits-to-signal mapping differs from the first coded bits-to-signal mapping.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: February 20, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Eko N. Onggosanusi, Alan Gatherer
  • Patent number: 7164704
    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: Grant
    Filed: January 24, 2000
    Date of Patent: January 16, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Anand G. Dabak, Mohammed Nafie, Timothy M. Schmidl, Alan Gatherer
  • Patent number: 7154958
    Abstract: A wireless communication network (10) includes a wireless transmitter having a plurality of antennas (AT11, AT12). The transmitter includes for each of a plurality of different user channels (Dn), circuitry (22n) for providing a plurality of groups of symbols in a first symbol group sequence (D1n). Each of the plurality of different user channels includes circuitry (241n) for forming a first modulated symbol group sequence for the user channel by modulating the symbols in the first symbol group sequence with a unique code that corresponds to the user channel and distinguishes the user channel from each other of the plurality of different user channels and circuitry (261) for combining the first modulated symbol group sequences for transmission by a first antenna (AT11). Each of the plurality of different user channels includes circuitry (22n) for forming a second symbol group sequence (D2n) by time reversing symbols in at least some of the groups of symbols.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: December 26, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Anand G. Dabak, Eko N. Onggosanusi, Timothy M Schmidl, Alan Gatherer