Resources Contact Us Home
Techniques for applying modulation constraints to data using periodically changing symbol mappings

Image Number 3 for United States Patent #7030789.

Techniques are provided for applying modulation constraints to data by using periodically changing symbol mappings to replace certain prohibited error prone data patterns. Initially, user data in a first base is mapped to integers of a second base using a base conversion technique. The integers in the second base correspond to symbols. Subsequently, periodically changing symbol mappings are performed during which prohibited symbols generated during base conversion are mapped to permitted symbols. The periodically changing symbol mappings occur in multiple phases, and the prohibited symbols are different in each phase. The resulting data is processed by a precoder in some embodiments.

  Recently Added Patents
File management apparatus and file management apparatus controlling method
Semiconductor power amplifier
Method for conductivity control of (Al,In,Ga,B)N
Email certificates
Methods and system for providing drug pricing information from multiple pharmacy benefit managers (PBMs)
Electromagnetic sensor cable and electrical configuration therefor
  Randomly Featured Patents
Digitally controlled oscillators
Regulation of a current through an inductive load
Measuring system having a measuring transducer of vibrating-type
Fish catch store for boats
Connector socket for eSATA and USB plugs
Microscope device and image processing method
Fecal occult blood test product with positive and negative controls
Trigger device for explosion barrier