DIGITAL COMMUNICATION SYSTEM HAVING IMPROVED COLOR CODE CAPABILITY

摘要

A time division multiple access communication system (10) is provided having multiple sub-channels according to known quadrature amplitude modulation techniques. Each sub-channel has a pre-determined time duration and is divid ed by a pre-determined number of symbol position time divisions. The symbol positions carry sync, pilot and data symbols. Color code information is incorporated into the sync and pilot symbols. The QAM constellation value of the sync symbol is mapped to a color code value. In addition, the sync symbo l carries a color code extension which enlarges the color code space.