Patents by Inventor Thomas J. Kolze

Thomas J. Kolze 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: 8169926
    Abstract: Enhanced channel changing within multi-channel communication systems. A CMTS directs channel changing of a CM, sometimes between upstream data bursts. Logical channels, part of a single frequency channel, may be used, and the channel changing may be performed between those logical channels. Multiple upstream burst profiles and/or modulation densities may be used providing high degrees of robustness, fidelity, and throughput and allowing great channel flexibility. A CM may be switched between channels without losing transmitter capability. Even if some throughput rate may be sacrificed during the channel changing, the CM will still be able to continue data throughput. Then, the new channel may then undergo the initialization and ranging processes thereby enabling greater throughput on that new channel. After undergoing the initialization and ranging processes, the new channel will then be a fully equivalent member of the CM communication system.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventors: Thomas J. Kolze, Bruce J. Currivan
  • Publication number: 20120076193
    Abstract: Provided is a method and system for estimating distortion in a communications channel including an adaptive equalizer. The method includes determining one or more adaptive filter coefficients associated with a signal passed through the equalizer. The method also includes estimating un-equalized channel distortion based upon the determined adaptive filter coefficients.
    Type: Application
    Filed: December 2, 2011
    Publication date: March 29, 2012
    Applicant: Broadcom Corporation
    Inventors: Thomas J. Kolze, Bruce J. Currivan
  • Patent number: 8107355
    Abstract: Systems and methods are disclosed for detecting and mitigating temporary high-level impairments, in a communications channel, and subsequently, mitigating the deleterious effects of the dynamic impairments. The system includes a transmitter and a receiver. The transmitter is adapted to transmit at least one set of modulated signals. The receiver is adapted to receive the at least one set of modulated signals and mitigate temporary high-level impairment in the at least one set of modulated signals using at least one error vector received during the temporary high-level impairment.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: January 31, 2012
    Assignee: Broadcom Corporation
    Inventor: Thomas J. Kolze
  • Patent number: 8094676
    Abstract: A single carrier cable modem can be initialized on multiple channels. By initializing a cable modem on more than one channel, the error rate performance of short data packets in cable modems in an impulsive noise environment is improved. The advantage of low symbol rate transmission for short packets in an impulse noise environment is achieved without sacrificing burst capacity at a cable modem and without the complexity of transmitting multiple symbol waveforms simultaneously at a cable modem.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: January 10, 2012
    Assignee: Broadcom Corporation
    Inventor: Thomas J Kolze
  • Patent number: 8073081
    Abstract: Systems and methods are disclosed for detecting temporary high level impairments, such as noise or interference, for example, in a communications channel, and subsequently, mitigating the deleterious effects of the dynamic impairments. In one embodiment, a preliminary decision is made on at least one signal transmitted over the communications channel. The at least one signal is remodulated and the impairment is determined using the at least one remodulate signal.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: December 6, 2011
    Assignee: Broadcom Corporation
    Inventor: Thomas J. Kolze
  • Patent number: 8073086
    Abstract: Provided is a method and system for estimating distortion in a communications channel including an adaptive equalizer. The method includes determining one or more adaptive filter coefficients associated with a signal passed through the equalizer. The method also includes estimating un-equalized channel distortion based upon the determined adaptive filter coefficients.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: December 6, 2011
    Assignee: Broadcom Corporation
    Inventors: Thomas J. Kolze, Bruce J. Currivan
  • Publication number: 20110286473
    Abstract: Signal processing under attenuated transmission conditions. Within an orthogonal signal space, the number of orthogonal signals that are used to transmit information from a transmitter to a receiver is reduced and the transmitted power of each of the now remaining orthogonal signals is modified; this may involve increasing the power of all of the remaining orthogonal signals equally or alternatively modifying them individually. The same modulation used before the reduction may also be used afterwards; within communication systems having multiple transmitter-receiver paths, this will ensure that the communication system's throughput and efficiency will remain unchanged even when one (or more) transmitter-receiver paths are highly attenuated. In addition, robust mode operation is provided for ranging and registering of transmitter devices when entering the communication system.
    Type: Application
    Filed: May 29, 2011
    Publication date: November 24, 2011
    Applicant: BROADCOM CORPORATION
    Inventors: Bruce J. Currivan, Thomas J. Kolze, Daniel H. Howard, Gottfried Ungerboeck
  • Publication number: 20110227768
    Abstract: Imbalance and distortion cancellation for composite analog to digital converter (ADC). Such an ‘ADC’ is implemented using two or more ADCs may be employed for sampling (e.g., quantizing, digitizing, etc.) of an analog (e.g., continuous time) signal in accordance with generating a digital (e.g., discrete time) signal. Using at least two ADCs allows for the accommodation and sampling of various signals having a much broader dynamic range without suffering degradation in signal to noise ratio (SNR). Generally, the signal provided via at least one of the paths corresponding to at least one of the respective ADCs is scaled (e.g., attenuated), so that the various ADCs effectively sample signals of different magnitudes. The ADCs may respectively correspond to different magnitude and/or power levels (e.g., high power, lower power, any intermediary power level, etc.). Various implementations of compensation may be performed along the various paths corresponding to the respective ADCs.
    Type: Application
    Filed: May 29, 2011
    Publication date: September 22, 2011
    Applicant: BROADCOM CORPORATION
    Inventors: Thomas J. Kolze, Bruce J. Currivan, Ramon Gomez, Loke Tan, Lin He
  • Patent number: 8009075
    Abstract: A method and apparatus is disclosed to extend a dynamic input range of an analog to digital converter (ADC). A composite ADC may include one or more ADCs. The one or more ADCs compare a signal metric of an analog input signal to quantization levels to produce intermediate digital output signals using one or more non-clipping input values. The composite ADC may select among the one or more intermediate digital output signals based on the signal metric of the analog input signal to produce a final digital output.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: August 30, 2011
    Assignee: Broadcom Corporation
    Inventors: Bruce J. Currivan, Thomas J. Kolze, Lin He, Loke Tan, Ramon Gomez, Francesco Gatta
  • Publication number: 20110135044
    Abstract: A filter settings generation operation includes sampling a communication channel to produce a sampled signal. The sampled signal is spectrally characterized across a frequency band of interest to produce a spectral characterization of the sampled signal. This spectral characterization may not include a signal of interest. The spectral characterization is then modified to produce a modified spectral characterization. Filter settings are then generated based upon the modified spectral characterization. Finally, the communication channel is filtered using the filter settings when the signal of interest is present on the communication channel. In modifying the spectral characterization, pluralities of spectral characteristics of the spectral characterization are independently modified to produce the modified spectral characterization. Modifications to the spectral characterization may be performed in the frequency domain and/or the time domain.
    Type: Application
    Filed: February 14, 2011
    Publication date: June 9, 2011
    Applicant: BROADCOM CORPORATION
    Inventors: Thomas J. Kolze, Bruce J. Currivan, Jonathan S. Min, Eric Ojard, James Chi Thi, Daniel Howard
  • Patent number: 7952502
    Abstract: Imbalance and distortion cancellation for composite analog to digital converter (ADC). Such an ‘ADC’ is implemented using two or more ADCs may be employed for sampling (e.g., quantizing, digitizing, etc.) of an analog (e.g., continuous time) signal in accordance with generating a digital (e.g., discrete time) signal. Using at least two ADCs allows for the accommodation and sampling of various signals having a much broader dynamic range without suffering degradation in signal to noise ratio (SNR). Generally, the signal provided via at least one of the paths corresponding to at least one of the respective ADCs is scaled (e.g., attenuated), so that the various ADCs effectively sample signals of different magnitudes. The ADCs may respectively correspond to different magnitude and/or power levels (e.g., high power, lower power, any intermediary power level, etc.). Various implementations of compensation may be performed along the various paths corresponding to the respective ADCs.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: May 31, 2011
    Assignee: Broadcom Corporation
    Inventors: Thomas J. Kolze, Bruce J. Currivan, Ramon Gomez, Loke Tan, Lin He
  • Patent number: 7953170
    Abstract: Signal processing under attenuated transmission conditions. Within an orthogonal signal space, the number of orthogonal signals that are used to transmit information from a transmitter to a receiver is reduced and the transmitted power of each of the now remaining orthogonal signals is modified; this may involve increasing the power of all of the remaining orthogonal signals equally or alternatively modifying them individually. The same modulation used before the reduction may also be used afterwards; within communication systems having multiple transmitter-receiver paths, this will ensure that the communication system's throughput and efficiency will remain unchanged even when one (or more) transmitter-receiver paths are highly attenuated. In addition, robust mode operation is provided for ranging and registering of transmitter devices when entering the communication system.
    Type: Grant
    Filed: May 3, 2009
    Date of Patent: May 31, 2011
    Assignee: Broadcom Corporation
    Inventors: Bruce J. Currivan, Thomas J. Kolze, Daniel H. Howard, Gottfried Ungerboeck
  • Patent number: 7941710
    Abstract: A system and method are used to provide uncorrelated code hopping in a communications system. A shift register receives data. The shift register is clocked to shift the data. A scaler performs a scaling operation on the data with a numerical value of active codes. A truncator truncates the scaled data to its seven most significant bits to produce a pseudo random hop number. A code matrix shifter circularly shifts the active codes in a code matrix based on the pseudo random hop number to produce a circularly shifted code. A transmitter transmits the circularly shifted code.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: May 10, 2011
    Assignee: Broadcom Corporation
    Inventors: Bruce J. Currivan, Thomas J. Kolze, Kevin L. Miller, Richard S. Prodan, Jonathan S. Min
  • Patent number: 7916816
    Abstract: Hardware allocation techniques are described for use in a multi-channel communication environment. The techniques may be used to reduce the number of gates needed for processing and/or to improve the efficiency and/or speed of a communication system. For example, resources that are under-utilized may be removed or allocated to another operation or user. In an exemplary implementation, a receiver includes a plurality of signal processing modules corresponding to respective channels and a hardware allocation module. The hardware allocation module allocates resources in the signal processing modules based on utilization of at least one of the resources.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: March 29, 2011
    Assignee: Broadcom Corporation
    Inventors: Bruce J. Currivan, Thomas J. Kolze, Loke K. Tan, Hanli Zou, Jonathan S. Min
  • Publication number: 20110072330
    Abstract: Modified error distance decoding. In certain communication systems, multiple signals (e.g., which may be viewed as being codewords, groups/sets of bits or symbols, etc.) can be commonly affected by such deleterious phenomenon as burst noise when traversing a communication channel (e.g., from a transmitter communication device to a receiver communication device). In such instances, a test error pattern may be identified which covers those affected bits (or symbols) among at least two respective signals (e.g., all of the respective signals or any subset thereof). Various respective test error patterns may be employed, each having a different respective weight, to the desired group of signals (e.g., codewords, groups/sets of bits or symbols, etc.). As such, more than one possible estimate of each respective signal may be generated. A variety of selection operations may be employed when more than one possible estimate exists (e.g., random selection, that estimate with minimum distance, etc.).
    Type: Application
    Filed: November 26, 2010
    Publication date: March 24, 2011
    Applicant: BROADCOM CORPORATION
    Inventor: Thomas J. Kolze
  • Publication number: 20110063148
    Abstract: Imbalance and distortion cancellation for composite analog to digital converter (ADC). Such an ‘ADC’ is implemented using two or more ADCs may be employed for sampling (e.g., quantizing, digitizing, etc.) of an analog (e.g., continuous time) signal in accordance with generating a digital (e.g., discrete time) signal. Using at least two ADCs allows for the accommodation and sampling of various signals having a much broader dynamic range without suffering degradation in signal to noise ratio (SNR). Generally, the signal provided via at least one of the paths corresponding to at least one of the respective ADCs is scaled (e.g., attenuated), so that the various ADCs effectively sample signals of different magnitudes. The ADCs may respectively correspond to different magnitude and/or power levels (e.g., high power, lower power, any intermediary power level, etc.). Various implementations of compensation may be performed along the various paths corresponding to the respective ADCs.
    Type: Application
    Filed: November 18, 2010
    Publication date: March 17, 2011
    Applicant: BROADCOM CORPORATION
    Inventors: Thomas J. Kolze, Bruce J. Currivan, Ramon Gomez, Loke Tan, Lin He
  • Patent number: 7889821
    Abstract: A filter settings generation operation includes sampling a communication channel to produce a sampled signal. The sampled signal is spectrally characterized across a frequency band of interest to produce a spectral characterization of the sampled signal. This spectral characterization may not include a signal of interest. The spectral characterization is then modified to produce a modified spectral characterization. Filter settings are then generated based upon the modified spectral characterization. Finally, the communication channel is filtered using the filter settings when the signal of interest is present on the communication channel. In modifying the spectral characterization, pluralities of spectral characteristics of the spectral characterization are independently modified to produce the modified spectral characterization. Modifications to the spectral characterization may be performed in the frequency domain and/or the time domain.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: February 15, 2011
    Assignee: Broadcom Corporation
    Inventors: Thomas J. Kolze, Bruce J. Currivan, Jonathan S. Min, Eric J. Ojard, James Chi Thi, Daniel H. Howard
  • Publication number: 20110022925
    Abstract: A method of transmitting data in a cable modem system includes the steps of encoding the data using forward error correction. The data is then encoded with Turbo encoding. The data is then sent to a modulation scheme. The data is then transmitted over a cable channel. The data is then demodulated. The data is then decoded using a Turbo decoder. An inverse of the forward error correction is then applied to the data.
    Type: Application
    Filed: July 26, 2010
    Publication date: January 27, 2011
    Applicant: Broadcom Corporation
    Inventors: Ravi BHASKARAN, Bruce J. Currivan, Thomas J. Kolze, Ba-Zhong Shen
  • Patent number: 7856049
    Abstract: A cable modem communication system includes a plurality of Cable Modems (CMs), a CM network segment, and a Cable Modem Termination System (CMTS). The CMTS segregates the plurality of CMs into a first group of CMs with which standard registering and ranging operations are performed and a second group of CMs with which attenuated transmission registering and ranging operations are performed. Each CM of the first group of CMs operable to perform registering and ranging operations by transmitting a ranging burst of a first format. Each CM of the second group of CMs operable to perform registering and ranging operations by transmitting a ranging burst of a second format that differs from the ranging burst of the first format. The CMTS may include a rake receiver that receives and demodulates a plurality of multi-path copies of the ranging burst of the second format.
    Type: Grant
    Filed: November 13, 2004
    Date of Patent: December 21, 2010
    Assignee: Broadcom Corporation
    Inventors: Bruce J. Currivan, Richard S. Prodan, Niki R. Pantelias, Thomas J. Kolze
  • Publication number: 20100272447
    Abstract: Signal detection for optical transmitters in networks with optical combining. Presented herein is a multi-faceted means for performing electrical to optical conversion such as in an optical transmitter as implemented within a communication system including at least some optical communication links therein. The turning on and turning off of a light source (e.g., a laser diode (LD), a light emitting diode (LED), and/or other component that performs electrical to optical conversion) is performed in accordance with a number of operational parameters. Some communication systems include multiple optical links (e.g., multiple fiber-optic links) from multiple transmitters that connect to a common receiver. In addition, some optical transmitters include multiple electrical links (e.g., multiple electrical communication links) from multiple communication devices that connect thereto.
    Type: Application
    Filed: April 22, 2010
    Publication date: October 28, 2010
    Applicant: BROADCOM CORPORATION
    Inventors: Thomas J. Kolze, Victor T. Hou, Bruce J. Currivan