Resources Contact Us Home
Method and apparatus for automated correlation of digital modulation impairment

Image Number 7 for United States Patent #7016401.

A method and apparatus for automated correlation of digital modulation impairment is described. The technique obtains soft decision data (116, 2502) and extracts signal space location information of sufficient resolution to distinguish different types of impairment to a digitally modulated signal. The technique applies an error vector magnitude mask (117, 502) and determines the signal-to-noise ratio of the digitally modulated signal. The technique applies impairment masks (118, 2504) and provides a characterization (119) of impairment affecting the digitally modulated signal (112). The technique determines a subset of the soft decision data (116, 2502) that falls within the impairment masks (118, 2505) and calculates correlation weights (2506). The technique may be used to identify, isolate, and classify different types of impairment. Given sufficient data collection, sources of impairments may be determined precisely.

  Recently Added Patents
Universal handle extension for unloading butterfly valve for tank trailer or other vehicle
Eyeglass component
Reliable event broadcaster with multiplexing and bandwidth control functions
Fuel cell system with mechanical check valve
Kit and method for the capture of tumor cells
Apparatus for restoring setting information of a board management controller from a backup memory before loading an OS when a system board is replaced
Focusing apparatus that effectively sets a focus area of an image when a focusing mode is changed
  Randomly Featured Patents
Method and apparatus for performing tone scale modifications on a sparsely sampled extended dynamic range digital image
Computer-readable storage device rack
Device for packaging and folding a flexible material part, in particular a parietal reinforcement
Furnace cooling system and method
Power circuit analysis apparatus and method that outputs an analysis result for segmented regions of the power circuit
Method and apparatus for network access
Implantable medical device lead connection assembly
Long-acting polypeptides and methods of producing same
Method for applying a protective coating on a magnetic recording head
Escalator drive mechanism with failure detection and backup