Patents by Inventor Jonathan Highton Stott
Jonathan Highton Stott 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).
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Patent number: 6999594Abstract: An RF active deflector is described for use with orthogonal frequency division multiplex signals. An input antenna receives an RF input signal and an output antenna transmits an RF signal on substantially the same frequency as the input signal. An amplification path between the input antenna and the output antenna provides substantially linear processing and includes a delay. Means responsive to the signal in the amplification path produce a plurality of control coefficients. A transversal filter receives the signal in the amplification path and, under control by the control coefficient, provides a modified signal. A combiner is provided for combining the modified signal with the signal in said amplification path so as to reduce the effect of the feedback.Type: GrantFiled: February 12, 2001Date of Patent: February 14, 2006Assignee: British Broadcasting CorporationInventors: Jonathan Highton Stott, Nicholas Dominic Wells
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Patent number: 6792258Abstract: A diversity receiver for receiving digital signals has a soft-decision decoder in each of its receiving sections, to provide confidence values for the received decoded digital values, and combines the values from the receiving sections in dependence upon the confidence values. The receiver is especially suitable for use with COFDM, and has two sections, the outputs of which are applied to a soft-decision combiner which combines the signals in dependence upon confidence values received from the demodulators. The output is then applied to a Viterbi decoder. The combining can simply involve switching but preferably involves averaging. Synchronisation and squelching can be provided. The system can be used with frequency diversity, spatial or polarisation diversity, or with antenna pattern diversity, in which case it can constitute an automatic rotator. The system automatically switches between different types of diversity reception, e.g.Type: GrantFiled: April 17, 2000Date of Patent: September 14, 2004Assignee: British Broadcasting CorporationInventors: Christopher Ryan Nokes, Oliver Paul Haffenden, Jonathan Highton Stott, Peter Neil Moss
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Patent number: 6628730Abstract: 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: GrantFiled: January 16, 2001Date of Patent: September 30, 2003Assignee: LSI Logic CorporationInventors: Jonathan Highton Stott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Lauret Regis, Jean-Marc Guyot
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Publication number: 20020044667Abstract: The feedback caused between the output (39) and the input (30) of an amplification path (54, 42, 56, 60, 62, 64) is reduced by providing a delay (60) in the amplification path, passing through the amplification path a signal having an auto-correlation function which is substantially a delta function, correlating (72) the said signal before being delayed in the delay with the signal after being delayed in the delay to produce a plurality of correlation coefficients, modifying the signal in the amplification path to provide a modified signal, the modification being provided by a transversal filter (76) controlled by the said plurality of correlation coefficients, and combining (42) the modified signal with the signal in the amplification path so as to reduce the effect of the feedback. The signal having an auto-correlation function which is substantially a delta function may be an added noise signal (70) or may be constituted by the signal being processed itself.Type: ApplicationFiled: February 12, 2001Publication date: April 18, 2002Inventors: Jonathan Highton Stott, Nicholas Dominic Wells
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Patent number: 6320917Abstract: 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 assessingType: GrantFiled: May 1, 1998Date of Patent: November 20, 2001Assignee: LSI Logic CorporationInventors: Jonathan Highton Stott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Regis Lauret, Jean-Marc Guyot
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Patent number: 6269165Abstract: The feedback caused between the output and the input of an amplification path is reduced by providing a delay in the amplification path, passing through the amplification path a signal having an auto-correlation function which is substantially a delta function, correlating the said signal before being delayed in the delay with the signal after being delayed in the delay to produce a plurality of correlation coefficients, modifying the signal in the amplification path to provide a modified signal, the modification being provided by a transversal filter controlled by the said plurality of correlation coefficients, and combining the modified signal with the signal in the amplification path so as to reduce the effect of the feedback.Type: GrantFiled: August 10, 1998Date of Patent: July 31, 2001Assignee: British Broadcasting CorporationInventors: Jonathan Highton Stott, Nicholas Dominic Wells
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Patent number: 6240146Abstract: 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: GrantFiled: May 1, 1998Date of Patent: May 29, 2001Assignee: LSI Logic CorporationInventors: Jonathan Highton Stott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Lauret Regis, Jean-Marc Guyot
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Patent number: 6205188Abstract: 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, andType: GrantFiled: May 1, 1998Date of Patent: March 20, 2001Assignee: LSI Logic CorporationInventors: Jonathan Highton Stott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Lauret Regis, Jean-Marc Guyot
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Patent number: 6137847Abstract: 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: GrantFiled: May 1, 1998Date of Patent: October 24, 2000Assignee: LSI Logic CorporationInventors: Jonathan Highton Stott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Lauret Regis, Jean-Marc Guyot
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Patent number: 6130922Abstract: 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: GrantFiled: May 1, 1998Date of Patent: October 10, 2000Assignee: LSI Logic CorporationInventors: Jonathan Highton Stott, Justin David Mitchell, Christopher Keith Perry Clarke, Adrian Paul Robinson, Oliver Paul Haffenden, Philippe Sadot, Lauret Regis, Jean-Marc Guyot