Method and Apparatus used at a receiver for determining the modulation used by a transmitter in a communication system with adaptive modulation

摘要

At transmitter is available MTAB with at least two different modulation methods (Mod0,1,,,) in connection with folding coding for fault protection. For modulating transmitted data (d) is selected a suitable modulation and is used for providing modulated symbols (s2). At receiver the symbols are demodulated, usign selected demodulating process, and suitable demodulation result is determined by stepwise perception of demodulation results of predetermined symbols. Independent claim is included for demodulator at station of communication network, for processing received symbols.