Patents by Inventor Ross E. Bland

Ross E. Bland 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).

  • System and method for improved spur reduction in direct RF receiver architectures
    Patent number: 8509354
    Abstract: Improved spur reduction architectures that improve linearity in direct radio frequency (RF) receiver architectures. Non-uniform sampling in the form of sampling clock phase (or frequency) modulation is used to induce phase (or frequency) modulation on signals that are being received from a given Nyquist zone. At the output of the ADC (analog-to-digital converter), the signals are de-modulated to remove the induced modulation based on the Nyquist zone that is being received. The de-modulation process results in non-desired spurious artifacts (interfering leakage signals and ADC spurs) being spread in the frequency domain. Strong spurious artifacts may be removed after measuring the induced modulation and de-modulating. For the case of weak spurious artifacts, the de-modulation for the desired Nyquist zone spread these signals in the frequency domain. Induced modulation on signals may also provide a dithering effect on the ADC.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: August 13, 2013
    Assignee: L—3 Communications Integrated Systems L.P.
    Inventors: Gerald L. Fudge, Ross E. Bland, Sujit Ravindran, Mark A. Chivers
  • Systems and methods for interference cancellation
    Patent number: 8078130
    Abstract: Systems and methods for interference cancellation in which a first signal having a first frequency may be cancelled with a second frequency having a second and different (e.g., lower) frequency by employing sampling to cancel the first signal with the separate signal at the sample instances.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: December 13, 2011
    Assignee: L-3 Communications Integrated Systems L.P.
    Inventors: Gerald L. Fudge, Ross E. Bland, Antone L. Kusmanoff
  • System and method for improved spur reduction in direct RF receiver architectures
    Publication number: 20100202566
    Abstract: Improved spur reduction architectures that improve linearity in direct radio frequency (RF) receiver architectures. Non-uniform sampling in the form of sampling clock phase (or frequency) modulation is used to induce phase (or frequency) modulation on signals that are being received from a given Nyquist zone. At the output of the ADC (analog-to-digital converter), the signals are de-modulated to remove the induced modulation based on the Nyquist zone that is being received. The de-modulation process results in non-desired spurious artifacts (interfering leakage signals and ADC spurs) being spread in the frequency domain. Strong spurious artifacts may be removed after measuring the induced modulation and de-modulating. For the case of weak spurious artifacts, the de-modulation for the desired Nyquist zone spread these signals in the frequency domain. Induced modulation on signals may also provide a dithering effect on the ADC.
    Type: Application
    Filed: December 2, 2009
    Publication date: August 12, 2010
    Inventors: Gerald L. Fudge, Ross E. Bland, Sujit Ravindran, Mark A. Chivers
  • Systems and methods for interference cancellation
    Publication number: 20100159866
    Abstract: Systems and methods for interference cancellation in which a first signal having a first frequency may be cancelled with a second frequency having a second and different (e.g., lower) frequency by employing sampling to cancel the first signal with the separate signal at the sample instances.
    Type: Application
    Filed: December 23, 2008
    Publication date: June 24, 2010
    Inventors: Gerald L. Fudge, Ross E. Bland, Antone L. Kusmanoff