Patents by Inventor Adrian Paul Robinson

Adrian Paul Robinson 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: 7221720
    Abstract: A DVB-T receiver includes a channel equalizer, a metric assignment and demapping circuit, a Viterbi decoder and an outer Reed-Solomon decoder. The metric assignment and demapping circuit includes a soft-decision quantising arrangement which provides confidence values for the Viterbi decoder. The quantising arrangement receives a control input from channel state indication (CSI) measurement circuitry. A further channel state indication is obtained on a symbol-by-symbol basis. This is compared an average obtained over a few symbols, to detect impulsive interference, and applied as part of the control for the soft-decision quantiser. A signal derived from the further channel state indication is also applied to the erasures input of the Reed-Solomon decoder.
    Type: Grant
    Filed: May 2, 2002
    Date of Patent: May 22, 2007
    Assignee: British Brodcasting Corporation
    Inventor: Adrian Paul Robinson
  • Patent number: 6628730
    Abstract: An apparatus for demodulating digital video broadcast signals comprising data modulated on a plurality of spaced carrier frequencies, comprising a transform circuit and a timing synchronization circuit. The transform circuit may be configured to analyze digital sample values. The timing synchronization circuit may be configured to synchronize the transform circuit with symbol periods of the broadcast signal. The timing synchronization circuit may be further configured to operate in (i) a first mode for analyzing the digital sample values over a relatively wide timing range to establish synchronization and (ii) a second mode for analyzing the digital sample values over a relatively narrow range about a synchronization point.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: September 30, 2003
    Assignee: LSI Logic Corporation
    Inventors: Jonathan Highton Stott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Lauret Regis, Jean-Marc Guyot
  • Publication number: 20020186797
    Abstract: A DVB-T receiver includes a channel equalizer (110), a metric assignment and demapping circuit (112), an inner interleaver (122), a Viterbi decoder (124), an outer interleaver (126) and an outer or Reed-Solomon decoder (128). The metric assignment and demapping circuit (112) includes a soft-decision quantizing arrangement (224, 226) which provides confidence values for the Viterbi decoder. The quantizing arrangement receives a control input from channel state indication (CSI) measurement circuitry (240, 260, 280).
    Type: Application
    Filed: May 2, 2002
    Publication date: December 12, 2002
    Inventor: Adrian Paul Robinson
  • Patent number: 6320627
    Abstract: A demodulator suitable for implementation in a single chip for demodulating digital video broadcast signals comprising data modulated on a multiplicity of spaced carrier frequencies, wherein an input broadcast signal is converted to a frequency sufficiently low to enable analog digital conversion of the signal, the demodulator comprising analog to digital conversion means (20) for converting the broadcast signal to a series of digital samples, real to complex conversion means (22) for converting each digital sample to a complex number value, Fourier transform means (24) for analyzing the complex number values to provide a series of signal values for each carrier frequency, frequency control means (9, 38), comprising means responsive to the output of said Fourier Transform means for producing a signal for controlling the frequency of the signal formed by said complex number values, and signal processing means for receiving the signal values and providing an output for decoding, the signal processing means incl
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: November 20, 2001
    Assignee: LSI Logic Corporation
    Inventors: Jonathan Highton Scott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Regis Lauret, Jean-Marc Guyot
  • Patent number: 6320915
    Abstract: Improved synchronization of OFDM signals is achieved. A controlled oscillator (8) provides clock pulses to derive complex samples of an input signal which are applied both to a fast Fourier transform (5) for data recovery and to a synchronization unit (9). The synchronization unit generates the complex product XY* of the input and the delayed input, which is applied to a high-pass filter (30) to suppress frequencies below the symbol frequency. The filter output is applied through a symbol comb filter (40) to an adaptive slicer (50) which determines the larger magnitude of the real and imaginary components of the signal. A pulse processor (60) generates a single pulse at the leading edge of the symbol pulse which is applied to a symbol counter (70). The symbol counter includes two count stages arranged to lock in quickly and yet be variable to accomodate different guard intervals in the OFDM signal.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: November 20, 2001
    Inventors: Jonathan Hghton Stott, Adrian Paul Robinson, Christopher Keith Perry Clark
  • Patent number: 6320917
    Abstract: Apparatus for demodulating digital video broadcast signals with an improved automatic frequency control comprises data modulated on a multiplicity of spaced carrier frequencies, including: analog to digital conversion device for providing a series of digital samples of the broadcast signal, Fourier Transform for analysing the samples to provide a series of data signal values for each carrier frequency signal processing devices for processing the series of data signal values including the phase-error-correcting, and automatic frequency control device for controlling the frequency of the signals input to the Fourier Transform Processor, wherein the automatic frequency control device includes coarse frequency control unit for controlling the frequency in terms of increments of the carrier spacing frequency, and fine frequency control unit for controlling the frequency for values less than a single carrier spacing frequency interval, wherein the coarse frequency unit includes recursive of filtering for assessing
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: November 20, 2001
    Assignee: LSI Logic Corporation
    Inventors: Jonathan Highton Stott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Regis Lauret, Jean-Marc Guyot
  • Patent number: 6240146
    Abstract: An apparatus for demodulating a digital video broadcast signal comprising data modulated on a multiplicity of spaced carrier frequencies. A transform device may analyze the digital broadcast signal to provide a series of symbol values for each of the multiplicity of carrier frequencies. An automatic frequency control device may control the frequency of the series of symbol values in dependence on a common phase error signal from the series of symbol values. First and second common phase error correction (CPE) devices may receive common phase error signals, for correcting the signal values from the transform device. A channel equalization device may compensate for communication channel impairments for receiving directly the phase error corrected signals from the first CPE device.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: May 29, 2001
    Assignee: LSI Logic Corporation
    Inventors: Jonathan Highton Stott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Lauret Regis, Jean-Marc Guyot
  • Patent number: 6205188
    Abstract: A demodulator suitable for implementation in a single chip for demodulating digital video broadcast signals including data modulated on a multiplicity of spaced carrier frequencies, wherein an input broadcast signal is converted to a frequency sufficiently low to enable analog to digital conversion of the signal, converter for converting the broadcast signal to a series of digital samples in complex format, transformer for analyzing the digital sample values to provide a series of data symbol values for each carrier frequency and signal processor including channel equalizer for receiving the signal values and providing an output for decoding, automatic frequency controller for controlling the frequencies of the digital sampling signals applied to the transformer, and timing synchronizer for synchronizing the transformer with the symbol periods of the broadcast signal, including correlator for receiving the digital signal values and including a delay having a time period equal to the active symbol period, and
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: March 20, 2001
    Assignee: LSI Logic Corporation
    Inventors: Jonathan Highton Stott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Lauret Regis, Jean-Marc Guyot
  • Patent number: 6137847
    Abstract: A demodulator suitable for implementation in a single chip for demodulating digital video broadcast signals including data modulated on a multiplicity of spaced carrier frequencies, wherein an input broadcast signal is converted to a frequency sufficiently low to enable analog digital conversion of the signal. The demodulator includes an analog to digital converter for converting the broadcast signal to a series of digital samples; a real to complex converter for converting each digital sample to a complex number value; Fourier transformer for analyzing the complex number values to provide a series of data symbol values for each carrier frequency; a signal processor for receiving the data symbol values and providing an output for decoding; and a timing synchronizer for synchronizing the Fourier transformer with the symbol periods of the broadcast signal.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: October 24, 2000
    Assignee: LSI Logic Corporation
    Inventors: Jonathan Highton Stott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Lauret Regis, Jean-Marc Guyot
  • Patent number: 6130922
    Abstract: Apparatus for demodulating digital video broadcast signals with an improved mechanism for automatic frequency control including data modulated on a multiplicity of spaced carrier frequencies. The apparatus includes an analog to digital converter for providing a series of digital samples of the broadcast signal, a Fourier Transformer for analyzing the samples to provide a series of data signal values for each carrier frequency, signal processor for processing the series of data signal values including the phase-error-correcter, and automatic frequency controller for controlling the frequency of the signals input to the Fourier Transformer. The automatic frequency controller includes coarse frequency controller for controlling the frequency in terms of increments of the carrier spacing frequency, and fine frequency controller for controlling the frequency for values less than a single carrier spacing frequency interval.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: October 10, 2000
    Assignee: LSI Logic Corporation
    Inventors: Jonathan Highton Stott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Lauret Regis, Jean-Marc Guyot