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
Touch panel structure and manufacturing method thereof
Power converter and method of power conversion
Managing job execution
High-resolution ranging and location finding using multicarrier signals
Protecting a gaming machine from rogue code
Real ear measurement system using thin tube
Terminal device and image printing method
  Randomly Featured Patents
Outdoor tanning enclosure
Method and device for thermally obliterating biological tissue
Systems and methods for remanufacturing imaging components
System for combining multiple-format multiple-source video signals
Assembly structure for Christmas light string controller
Method and apparatus of multi-entity wireless communication adapter
Reclosable containers and blanks therefor
Grade averaging calculator
Raphiolepis indica plant named `Sopink`
Method of repair paint curing for production lines and apparatus